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Merge branch 'master' into kvm-clock

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This commit is contained in:
Sergei Trifonov 2022-09-13 12:45:24 +02:00 committed by GitHub
commit 5ee2f1701c
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47 changed files with 982 additions and 598 deletions
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6
docker/server/entrypoint.sh
View File

@ -38,6 +38,7 @@ FORMAT_SCHEMA_PATH="$(clickhouse extract-from-config --config-file "$CLICKHOUSE_
# There could be many disks declared in config
readarray -t DISKS_PATHS < <(clickhouse extract-from-config --config-file "$CLICKHOUSE_CONFIG" --key='storage_configuration.disks.*.path' || true)
readarray -t DISKS_METADATA_PATHS < <(clickhouse extract-from-config --config-file "$CLICKHOUSE_CONFIG" --key='storage_configuration.disks.*.metadata_path' || true)
CLICKHOUSE_USER="${CLICKHOUSE_USER:-default}"
CLICKHOUSE_PASSWORD="${CLICKHOUSE_PASSWORD:-}"
@ -50,7 +51,8 @@ for dir in "$DATA_DIR" \
"$TMP_DIR" \
"$USER_PATH" \
"$FORMAT_SCHEMA_PATH" \
"${DISKS_PATHS[@]}"
"${DISKS_PATHS[@]}" \
"${DISKS_METADATA_PATHS[@]}"
do
# check if variable not empty
[ -z "$dir" ] && continue
@ -106,7 +108,7 @@ if [ -n "$(ls /docker-entrypoint-initdb.d/)" ] || [ -n "$CLICKHOUSE_DB" ]; then
# port is needed to check if clickhouse-server is ready for connections
HTTP_PORT="$(clickhouse extract-from-config --config-file "$CLICKHOUSE_CONFIG" --key=http_port)"
HTTPS_PORT="$(clickhouse extract-from-config --config-file "$CLICKHOUSE_CONFIG" --key=https_port)"
if [ -n "$HTTP_PORT" ]; then
URL="http://127.0.0.1:$HTTP_PORT/ping"
else

1
docker/test/stress/run.sh
View File

@ -370,6 +370,7 @@ else
# Avoid "Setting s3_check_objects_after_upload is neither a builtin setting..."
rm -f /etc/clickhouse-server/users.d/enable_blobs_check.xml ||:
rm -f /etc/clickhouse-server/users.d/marks.xml ||:
# Remove s3 related configs to avoid "there is no disk type `cache`"
rm -f /etc/clickhouse-server/config.d/storage_conf.xml ||:

4
programs/local/LocalServer.cpp
View File

@ -227,6 +227,8 @@ void LocalServer::cleanup()
global_context.reset();
}
/// thread status should be destructed before shared context because it relies on process list.
status.reset();
// Delete the temporary directory if needed.
@ -366,7 +368,7 @@ int LocalServer::main(const std::vector<std::string> & /*args*/)
try
{
UseSSL use_ssl;
ThreadStatus thread_status;
thread_status.emplace();
StackTrace::setShowAddresses(config().getBool("show_addresses_in_stack_traces", true));

8
src/Client/ClientBase.h
View File

@ -176,9 +176,6 @@ protected:
bool stderr_is_a_tty = false; /// stderr is a terminal.
uint64_t terminal_width = 0;
ServerConnectionPtr connection;
ConnectionParameters connection_parameters;
String format; /// Query results output format.
bool select_into_file = false; /// If writing result INTO OUTFILE. It affects progress rendering.
bool select_into_file_and_stdout = false; /// If writing result INTO OUTFILE AND STDOUT. It affects progress rendering.
@ -199,6 +196,11 @@ protected:
SharedContextHolder shared_context;
ContextMutablePtr global_context;
std::optional<ThreadStatus> thread_status;
ServerConnectionPtr connection;
ConnectionParameters connection_parameters;
/// Buffer that reads from stdin in batch mode.
ReadBufferFromFileDescriptor std_in{STDIN_FILENO};
/// Console output.

3
src/Client/LocalConnection.cpp
View File

@ -31,9 +31,6 @@ LocalConnection::LocalConnection(ContextPtr context_, bool send_progress_, bool
/// Authenticate and create a context to execute queries.
session.authenticate("default", "", Poco::Net::SocketAddress{});
session.makeSessionContext();
if (!CurrentThread::isInitialized())
thread_status.emplace();
}
LocalConnection::~LocalConnection()

1
src/Client/LocalConnection.h
View File

@ -156,7 +156,6 @@ private:
String description = "clickhouse-local";
std::optional<LocalQueryState> state;
std::optional<ThreadStatus> thread_status;
/// Last "server" packet.
std::optional<UInt64> next_packet_type;

3
src/Common/ProfileEvents.cpp
View File

@ -146,6 +146,9 @@
M(SelectedRows, "Number of rows SELECTed from all tables.") \
M(SelectedBytes, "Number of bytes (uncompressed; for columns as they stored in memory) SELECTed from all tables.") \
\
M(WaitMarksLoadMicroseconds, "Time spent loading marks") \
M(BackgroundLoadingMarksTasks, "Number of background tasks for loading marks") \
\
M(Merge, "Number of launched background merges.") \
M(MergedRows, "Rows read for background merges. This is the number of rows before merge.") \
M(MergedUncompressedBytes, "Uncompressed bytes (for columns as they stored in memory) that was read for background merges. This is the number before merge.") \

6
src/Coordination/KeeperServer.cpp
View File

@ -442,9 +442,9 @@ void KeeperServer::shutdownRaftServer()
void KeeperServer::shutdown()
{
state_machine->shutdownStorage();
state_manager->flushAndShutDownLogStore();
shutdownRaftServer();
state_machine->shutdownStorage();
}
namespace
@ -617,7 +617,9 @@ nuraft::cb_func::ReturnCode KeeperServer::callbackFunc(nuraft::cb_func::Type typ
auto & entry_buf = entry->get_buf();
auto request_for_session = state_machine->parseRequest(entry_buf);
request_for_session.zxid = next_zxid;
state_machine->preprocess(request_for_session);
if (!state_machine->preprocess(request_for_session))
return nuraft::cb_func::ReturnCode::ReturnNull;
request_for_session.digest = state_machine->getNodesDigest();
entry = nuraft::cs_new<nuraft::log_entry>(entry->get_term(), getZooKeeperLogEntry(request_for_session), entry->get_val_type());
break;

10
src/Coordination/KeeperStateMachine.cpp
View File

@ -191,12 +191,16 @@ KeeperStorage::RequestForSession KeeperStateMachine::parseRequest(nuraft::buffer
return request_for_session;
}
void KeeperStateMachine::preprocess(const KeeperStorage::RequestForSession & request_for_session)
bool KeeperStateMachine::preprocess(const KeeperStorage::RequestForSession & request_for_session)
{
if (request_for_session.request->getOpNum() == Coordination::OpNum::SessionID)
return;
return true;
std::lock_guard lock(storage_and_responses_lock);
if (storage->isFinalized())
return false;
try
{
storage->preprocessRequest(
@ -215,6 +219,8 @@ void KeeperStateMachine::preprocess(const KeeperStorage::RequestForSession & req
if (keeper_context->digest_enabled && request_for_session.digest)
assertDigest(*request_for_session.digest, storage->getNodesDigest(false), *request_for_session.request, false);
return true;
}
nuraft::ptr<nuraft::buffer> KeeperStateMachine::commit(const uint64_t log_idx, nuraft::buffer & data)

2
src/Coordination/KeeperStateMachine.h
View File

@ -33,7 +33,7 @@ public:
static KeeperStorage::RequestForSession parseRequest(nuraft::buffer & data);
void preprocess(const KeeperStorage::RequestForSession & request_for_session);
bool preprocess(const KeeperStorage::RequestForSession & request_for_session);
nuraft::ptr<nuraft::buffer> pre_commit(uint64_t log_idx, nuraft::buffer & data) override;

15
src/Coordination/KeeperStorage.cpp
View File

@ -516,7 +516,7 @@ void KeeperStorage::UncommittedState::rollback(int64_t rollback_zxid)
std::shared_ptr<KeeperStorage::Node> KeeperStorage::UncommittedState::getNode(StringRef path) const
{
if (auto node_it = nodes.find(std::string{path}); node_it != nodes.end())
if (auto node_it = nodes.find(path.toView()); node_it != nodes.end())
return node_it->second.node;
return tryGetNodeFromStorage(path);
@ -524,7 +524,7 @@ std::shared_ptr<KeeperStorage::Node> KeeperStorage::UncommittedState::getNode(St
Coordination::ACLs KeeperStorage::UncommittedState::getACLs(StringRef path) const
{
if (auto node_it = nodes.find(std::string{path}); node_it != nodes.end())
if (auto node_it = nodes.find(path.toView()); node_it != nodes.end())
return node_it->second.acls;
auto node_it = storage.container.find(path);
@ -830,7 +830,9 @@ bool KeeperStorage::checkACL(StringRef path, int32_t permission, int64_t session
void KeeperStorage::unregisterEphemeralPath(int64_t session_id, const std::string & path)
{
auto ephemerals_it = ephemerals.find(session_id);
assert(ephemerals_it != ephemerals.end());
if (ephemerals_it == ephemerals.end())
throw Exception(ErrorCodes::LOGICAL_ERROR, "Session {} is missing ephemeral path");
ephemerals_it->second.erase(path);
if (ephemerals_it->second.empty())
ephemerals.erase(ephemerals_it);
@ -1825,6 +1827,11 @@ void KeeperStorage::finalize()
session_expiry_queue.clear();
}
bool KeeperStorage::isFinalized() const
{
return finalized;
}
class KeeperStorageRequestProcessorsFactory final : private boost::noncopyable
{
@ -1892,7 +1899,7 @@ UInt64 KeeperStorage::calculateNodesDigest(UInt64 current_digest, const std::vec
if (!keeper_context->digest_enabled)
return current_digest;
std::unordered_map<std::string, std::shared_ptr<Node>> updated_nodes;
std::unordered_map<std::string_view, std::shared_ptr<Node>> updated_nodes;
for (const auto & delta : new_deltas)
{

2
src/Coordination/KeeperStorage.h
View File

@ -425,6 +425,8 @@ public:
void finalize();
bool isFinalized() const;
/// Set of methods for creating snapshots
/// Turn on snapshot mode, so data inside Container is not deleted, but replaced with new version.

2
src/Core/Settings.h
View File

@ -602,6 +602,8 @@ static constexpr UInt64 operator""_GiB(unsigned long long value)
M(Bool, skip_download_if_exceeds_query_cache, true, "Skip download from remote filesystem if exceeds query cache size", 0) \
M(UInt64, max_query_cache_size, (128UL * 1024 * 1024 * 1024), "Max remote filesystem cache size that can be used by a single query", 0) \
\
M(Bool, load_marks_asynchronously, false, "Load MergeTree marks asynchronously", 0) \
\
M(Bool, use_structure_from_insertion_table_in_table_functions, false, "Use structure from insertion table instead of schema inference from data", 0) \
\
M(UInt64, http_max_tries, 10, "Max attempts to read via http.", 0) \

207
src/Disks/IO/CachedOnDiskReadBufferFromFile.cpp
View File

@ -118,7 +118,11 @@ void CachedOnDiskReadBufferFromFile::initialize(size_t offset, size_t size)
}
else
{
file_segments_holder.emplace(cache->getOrSet(cache_key, offset, size, is_persistent));
CreateFileSegmentSettings create_settings{
.is_persistent = is_persistent
};
file_segments_holder.emplace(cache->getOrSet(cache_key, offset, size, create_settings));
}
/**
@ -156,7 +160,7 @@ CachedOnDiskReadBufferFromFile::getCacheReadBuffer(size_t offset) const
}
CachedOnDiskReadBufferFromFile::ImplementationBufferPtr
CachedOnDiskReadBufferFromFile::getRemoteFSReadBuffer(FileSegmentPtr & file_segment, ReadType read_type_)
CachedOnDiskReadBufferFromFile::getRemoteFSReadBuffer(FileSegment & file_segment, ReadType read_type_)
{
switch (read_type_)
{
@ -178,7 +182,7 @@ CachedOnDiskReadBufferFromFile::getRemoteFSReadBuffer(FileSegmentPtr & file_segm
* Implementation buffer from segment1 is passed to segment2 once segment1 is loaded.
*/
auto remote_fs_segment_reader = file_segment->getRemoteFileReader();
auto remote_fs_segment_reader = file_segment.getRemoteFileReader();
if (!remote_fs_segment_reader)
{
@ -189,7 +193,7 @@ CachedOnDiskReadBufferFromFile::getRemoteFSReadBuffer(FileSegmentPtr & file_segm
ErrorCodes::CANNOT_USE_CACHE,
"Cache cannot be used with a ReadBuffer which does not support right bounded reads");
file_segment->setRemoteFileReader(remote_fs_segment_reader);
file_segment.setRemoteFileReader(remote_fs_segment_reader);
}
return remote_fs_segment_reader;
@ -201,8 +205,8 @@ CachedOnDiskReadBufferFromFile::getRemoteFSReadBuffer(FileSegmentPtr & file_segm
if (remote_file_reader && remote_file_reader->getFileOffsetOfBufferEnd() == file_offset_of_buffer_end)
return remote_file_reader;
auto remote_fs_segment_reader = file_segment->extractRemoteFileReader();
if (remote_fs_segment_reader)
auto remote_fs_segment_reader = file_segment.extractRemoteFileReader();
if (remote_fs_segment_reader && file_offset_of_buffer_end == remote_file_reader->getFileOffsetOfBufferEnd())
remote_file_reader = remote_fs_segment_reader;
else
remote_file_reader = implementation_buffer_creator();
@ -217,6 +221,19 @@ CachedOnDiskReadBufferFromFile::getRemoteFSReadBuffer(FileSegmentPtr & file_segm
}
}
bool CachedOnDiskReadBufferFromFile::canStartFromCache(size_t current_offset, const FileSegment & file_segment)
{
/// segment{k} state: DOWNLOADING
/// cache: [______|___________
/// ^
/// first_non_downloaded_offset (in progress)
/// requested_range: [__________]
/// ^
/// current_offset
size_t first_non_downloaded_offset = file_segment.getFirstNonDownloadedOffset();
return first_non_downloaded_offset > current_offset;
}
CachedOnDiskReadBufferFromFile::ImplementationBufferPtr
CachedOnDiskReadBufferFromFile::getReadBufferForFileSegment(FileSegmentPtr & file_segment)
{
@ -236,7 +253,7 @@ CachedOnDiskReadBufferFromFile::getReadBufferForFileSegment(FileSegmentPtr & fil
{
LOG_DEBUG(log, "Bypassing cache because `read_from_filesystem_cache_if_exists_otherwise_bypass_cache` option is used");
read_type = ReadType::REMOTE_FS_READ_BYPASS_CACHE;
return getRemoteFSReadBuffer(file_segment, read_type);
return getRemoteFSReadBuffer(*file_segment, read_type);
}
}
@ -248,21 +265,16 @@ CachedOnDiskReadBufferFromFile::getReadBufferForFileSegment(FileSegmentPtr & fil
{
LOG_DEBUG(log, "Bypassing cache because file segment state is `SKIP_CACHE`");
read_type = ReadType::REMOTE_FS_READ_BYPASS_CACHE;
return getRemoteFSReadBuffer(file_segment, read_type);
return getRemoteFSReadBuffer(*file_segment, read_type);
}
case FileSegment::State::DOWNLOADING:
{
size_t download_offset = file_segment->getDownloadOffset();
bool can_start_from_cache = download_offset > file_offset_of_buffer_end;
/// If file segment is being downloaded but we can already read
/// from already downloaded part, do that.
if (can_start_from_cache)
if (canStartFromCache(file_offset_of_buffer_end, *file_segment))
{
/// segment{k} state: DOWNLOADING
/// cache: [______|___________
/// ^
/// download_offset (in progress)
/// first_non_downloaded_offset (in progress)
/// requested_range: [__________]
/// ^
/// file_offset_of_buffer_end
@ -282,12 +294,12 @@ CachedOnDiskReadBufferFromFile::getReadBufferForFileSegment(FileSegmentPtr & fil
case FileSegment::State::EMPTY:
case FileSegment::State::PARTIALLY_DOWNLOADED:
{
if (file_segment->getDownloadOffset() > file_offset_of_buffer_end)
if (canStartFromCache(file_offset_of_buffer_end, *file_segment))
{
/// segment{k} state: PARTIALLY_DOWNLOADED
/// cache: [______|___________
/// ^
/// download_offset (in progress)
/// first_non_downloaded_offset (in progress)
/// requested_range: [__________]
/// ^
/// file_offset_of_buffer_end
@ -299,20 +311,12 @@ CachedOnDiskReadBufferFromFile::getReadBufferForFileSegment(FileSegmentPtr & fil
auto downloader_id = file_segment->getOrSetDownloader();
if (downloader_id == file_segment->getCallerId())
{
size_t download_offset = file_segment->getDownloadOffset();
bool can_start_from_cache = download_offset > file_offset_of_buffer_end;
LOG_TEST(
log,
"Current download offset: {}, file offset of buffer end: {}",
download_offset, file_offset_of_buffer_end);
if (can_start_from_cache)
if (canStartFromCache(file_offset_of_buffer_end, *file_segment))
{
/// segment{k}
/// cache: [______|___________
/// ^
/// download_offset
/// first_non_downloaded_offset
/// requested_range: [__________]
/// ^
/// file_offset_of_buffer_end
@ -322,27 +326,24 @@ CachedOnDiskReadBufferFromFile::getReadBufferForFileSegment(FileSegmentPtr & fil
return getCacheReadBuffer(range.left);
}
if (download_offset < file_offset_of_buffer_end)
if (file_segment->getCurrentWriteOffset() < file_offset_of_buffer_end)
{
/// segment{1}
/// cache: [_____|___________
/// ^
/// download_offset
/// current_write_offset
/// requested_range: [__________]
/// ^
/// file_offset_of_buffer_end
assert(file_offset_of_buffer_end > file_segment->getDownloadOffset());
bytes_to_predownload = file_offset_of_buffer_end - file_segment->getDownloadOffset();
assert(bytes_to_predownload < range.size());
LOG_TEST(log, "Predownload. File segment info: {}", file_segment->getInfoForLog());
chassert(file_offset_of_buffer_end > file_segment->getCurrentWriteOffset());
bytes_to_predownload = file_offset_of_buffer_end - file_segment->getCurrentWriteOffset();
chassert(bytes_to_predownload < range.size());
}
download_offset = file_segment->getDownloadOffset();
can_start_from_cache = download_offset > file_offset_of_buffer_end;
assert(!can_start_from_cache);
read_type = ReadType::REMOTE_FS_READ_AND_PUT_IN_CACHE;
return getRemoteFSReadBuffer(file_segment, read_type);
return getRemoteFSReadBuffer(*file_segment, read_type);
}
download_state = file_segment->state();
@ -350,10 +351,7 @@ CachedOnDiskReadBufferFromFile::getReadBufferForFileSegment(FileSegmentPtr & fil
}
case FileSegment::State::PARTIALLY_DOWNLOADED_NO_CONTINUATION:
{
size_t download_offset = file_segment->getDownloadOffset();
bool can_start_from_cache = download_offset > file_offset_of_buffer_end;
if (can_start_from_cache)
if (canStartFromCache(file_offset_of_buffer_end, *file_segment))
{
read_type = ReadType::CACHED;
return getCacheReadBuffer(range.left);
@ -364,7 +362,7 @@ CachedOnDiskReadBufferFromFile::getReadBufferForFileSegment(FileSegmentPtr & fil
log,
"Bypassing cache because file segment state is `PARTIALLY_DOWNLOADED_NO_CONTINUATION` and downloaded part already used");
read_type = ReadType::REMOTE_FS_READ_BYPASS_CACHE;
return getRemoteFSReadBuffer(file_segment, read_type);
return getRemoteFSReadBuffer(*file_segment, read_type);
}
}
}
@ -374,8 +372,8 @@ CachedOnDiskReadBufferFromFile::getReadBufferForFileSegment(FileSegmentPtr & fil
CachedOnDiskReadBufferFromFile::ImplementationBufferPtr
CachedOnDiskReadBufferFromFile::getImplementationBuffer(FileSegmentPtr & file_segment)
{
assert(!file_segment->isDownloader());
assert(file_offset_of_buffer_end >= file_segment->range().left);
chassert(!file_segment->isDownloader());
chassert(file_offset_of_buffer_end >= file_segment->range().left);
auto range = file_segment->range();
bytes_to_predownload = 0;
@ -389,10 +387,10 @@ CachedOnDiskReadBufferFromFile::getImplementationBuffer(FileSegmentPtr & file_se
ProfileEvents::FileSegmentWaitReadBufferMicroseconds, watch.elapsedMicroseconds());
[[maybe_unused]] auto download_current_segment = read_type == ReadType::REMOTE_FS_READ_AND_PUT_IN_CACHE;
assert(download_current_segment == file_segment->isDownloader());
chassert(download_current_segment == file_segment->isDownloader());
assert(file_segment->range() == range);
assert(file_offset_of_buffer_end >= range.left && file_offset_of_buffer_end <= range.right);
chassert(file_segment->range() == range);
chassert(file_offset_of_buffer_end >= range.left && file_offset_of_buffer_end <= range.right);
LOG_TEST(
log,
@ -441,12 +439,12 @@ CachedOnDiskReadBufferFromFile::getImplementationBuffer(FileSegmentPtr & file_se
}
case ReadType::REMOTE_FS_READ_AND_PUT_IN_CACHE:
{
assert(file_segment->isDownloader());
chassert(file_segment->isDownloader());
if (bytes_to_predownload)
{
size_t download_offset = file_segment->getDownloadOffset();
read_buffer_for_file_segment->seek(download_offset, SEEK_SET);
size_t current_write_offset = file_segment->getCurrentWriteOffset();
read_buffer_for_file_segment->seek(current_write_offset, SEEK_SET);
}
else
{
@ -456,18 +454,15 @@ CachedOnDiskReadBufferFromFile::getImplementationBuffer(FileSegmentPtr & file_se
assert(static_cast<size_t>(read_buffer_for_file_segment->getFileOffsetOfBufferEnd()) == file_offset_of_buffer_end);
}
auto download_offset = file_segment->getDownloadOffset();
if (download_offset != static_cast<size_t>(read_buffer_for_file_segment->getPosition()))
auto current_write_offset = file_segment->getCurrentWriteOffset();
if (current_write_offset != static_cast<size_t>(read_buffer_for_file_segment->getPosition()))
{
throw Exception(
ErrorCodes::LOGICAL_ERROR,
"Buffer's offsets mismatch; cached buffer offset: {}, download_offset: {}, "
"position: {}, implementation buffer remaining read range: {}, file segment info: {}",
file_offset_of_buffer_end,
download_offset,
read_buffer_for_file_segment->getPosition(),
read_buffer_for_file_segment->getRemainingReadRange().toString(),
file_segment->getInfoForLog());
"Buffer's offsets mismatch. Cached buffer offset: {}, current_write_offset: {} implementation buffer offset: {}, "
"implementation buffer remaining range: {}, file segment info: {}",
file_offset_of_buffer_end, current_write_offset, read_buffer_for_file_segment->getPosition(),
read_buffer_for_file_segment->getRemainingReadRange().toString(), file_segment->getInfoForLog());
}
break;
@ -488,7 +483,7 @@ bool CachedOnDiskReadBufferFromFile::completeFileSegmentAndGetNext()
auto & file_segment = *file_segment_it;
[[maybe_unused]] const auto & range = file_segment->range();
assert(file_offset_of_buffer_end > range.right);
chassert(file_offset_of_buffer_end > range.right);
LOG_TEST(
log,
@ -499,10 +494,8 @@ bool CachedOnDiskReadBufferFromFile::completeFileSegmentAndGetNext()
/// Do not hold pointer to file segment if it is not needed anymore
/// so can become releasable and can be evicted from cache.
/// If the status of filesegment state is SKIP_CACHE, it will not be deleted.
/// It will be deleted from the cache when the holder is destructed.
if ((*file_segment_it)->state() != FileSegment::State::SKIP_CACHE)
file_segments_holder->file_segments.erase(file_segment_it);
file_segment->completeWithoutState();
file_segments_holder->file_segments.erase(file_segment_it);
if (current_file_segment_it == file_segments_holder->file_segments.end())
return false;
@ -545,8 +538,8 @@ void CachedOnDiskReadBufferFromFile::predownload(FileSegmentPtr & file_segment)
/// download from offset a'' < a', but return buffer from offset a'.
LOG_TEST(log, "Bytes to predownload: {}, caller_id: {}", bytes_to_predownload, FileSegment::getCallerId());
assert(implementation_buffer->getFileOffsetOfBufferEnd() == file_segment->getDownloadOffset());
size_t current_offset = file_segment->getDownloadOffset();
chassert(implementation_buffer->getFileOffsetOfBufferEnd() == file_segment->getCurrentWriteOffset());
size_t current_offset = file_segment->getCurrentWriteOffset();
const auto & current_range = file_segment->range();
while (true)
@ -572,7 +565,7 @@ void CachedOnDiskReadBufferFromFile::predownload(FileSegmentPtr & file_segment)
"current download offset: {}, expected: {}, eof: {}",
bytes_to_predownload,
current_range.toString(),
file_segment->getDownloadOffset(),
file_segment->getCurrentWriteOffset(),
file_offset_of_buffer_end,
implementation_buffer->eof());
@ -582,18 +575,20 @@ void CachedOnDiskReadBufferFromFile::predownload(FileSegmentPtr & file_segment)
{
nextimpl_working_buffer_offset = implementation_buffer->offset();
auto download_offset = file_segment->getDownloadOffset();
if (download_offset != static_cast<size_t>(implementation_buffer->getPosition())
|| download_offset != file_offset_of_buffer_end)
auto current_write_offset = file_segment->getCurrentWriteOffset();
if (current_write_offset != static_cast<size_t>(implementation_buffer->getPosition())
|| current_write_offset != file_offset_of_buffer_end)
{
throw Exception(
ErrorCodes::LOGICAL_ERROR,
"Buffer's offsets mismatch after predownloading; download offset: {}, "
"cached buffer offset: {}, implementation buffer offset: {}, "
"file segment info: {}",
download_offset,
current_write_offset,
file_offset_of_buffer_end,
implementation_buffer->getPosition(),
file_segment->getInfoForLog());
}
}
break;
@ -609,7 +604,7 @@ void CachedOnDiskReadBufferFromFile::predownload(FileSegmentPtr & file_segment)
{
LOG_TEST(log, "Left to predownload: {}, buffer size: {}", bytes_to_predownload, current_impl_buffer_size);
assert(file_segment->getDownloadOffset() == static_cast<size_t>(implementation_buffer->getPosition()));
chassert(file_segment->getCurrentWriteOffset() == static_cast<size_t>(implementation_buffer->getPosition()));
bool success = writeCache(implementation_buffer->buffer().begin(), current_predownload_size, current_offset, *file_segment);
if (success)
@ -635,7 +630,7 @@ void CachedOnDiskReadBufferFromFile::predownload(FileSegmentPtr & file_segment)
/// segment{1}
/// cache: [_____|___________
/// ^
/// download_offset
/// current_write_offset
/// requested_range: [__________]
/// ^
/// file_offset_of_buffer_end
@ -649,17 +644,18 @@ void CachedOnDiskReadBufferFromFile::predownload(FileSegmentPtr & file_segment)
bytes_to_predownload = 0;
file_segment->completeWithState(FileSegment::State::PARTIALLY_DOWNLOADED_NO_CONTINUATION);
LOG_TEST(log, "Bypassing cache because space reservation failed");
LOG_TEST(log, "Bypassing cache because for {}", file_segment->getInfoForLog());
read_type = ReadType::REMOTE_FS_READ_BYPASS_CACHE;
swap(*implementation_buffer);
resetWorkingBuffer();
implementation_buffer = getRemoteFSReadBuffer(file_segment, read_type);
implementation_buffer = getRemoteFSReadBuffer(*file_segment, read_type);
swap(*implementation_buffer);
implementation_buffer->setReadUntilPosition(current_range.right + 1); /// [..., range.right]
implementation_buffer->setReadUntilPosition(file_segment->range().right + 1); /// [..., range.right]
implementation_buffer->seek(file_offset_of_buffer_end, SEEK_SET);
LOG_TEST(
@ -680,8 +676,8 @@ bool CachedOnDiskReadBufferFromFile::updateImplementationBufferIfNeeded()
auto current_read_range = file_segment->range();
auto current_state = file_segment->state();
assert(current_read_range.left <= file_offset_of_buffer_end);
assert(!file_segment->isDownloader());
chassert(current_read_range.left <= file_offset_of_buffer_end);
chassert(!file_segment->isDownloader());
if (file_offset_of_buffer_end > current_read_range.right)
{
@ -695,13 +691,15 @@ bool CachedOnDiskReadBufferFromFile::updateImplementationBufferIfNeeded()
/// segment{k}
/// cache: [______|___________
/// ^
/// download_offset
/// current_write_offset
/// requested_range: [__________]
/// ^
/// file_offset_of_buffer_end
size_t download_offset = file_segment->getDownloadOffset();
bool cached_part_is_finished = download_offset == file_offset_of_buffer_end;
auto current_write_offset = file_segment->getCurrentWriteOffset();
bool cached_part_is_finished = current_write_offset == file_offset_of_buffer_end;
LOG_TEST(log, "Current write offset: {}, file offset of buffer end: {}", current_write_offset, file_offset_of_buffer_end);
if (cached_part_is_finished)
{
@ -710,12 +708,12 @@ bool CachedOnDiskReadBufferFromFile::updateImplementationBufferIfNeeded()
return true;
}
else if (download_offset < file_offset_of_buffer_end)
else if (current_write_offset < file_offset_of_buffer_end)
{
throw Exception(
ErrorCodes::LOGICAL_ERROR,
"Expected {} >= {} ({})",
download_offset, file_offset_of_buffer_end, getInfoForLog());
current_write_offset, file_offset_of_buffer_end, getInfoForLog());
}
}
@ -725,7 +723,7 @@ bool CachedOnDiskReadBufferFromFile::updateImplementationBufferIfNeeded()
* ReadType::REMOTE_FS_READ_AND_PUT_IN_CACHE means that on previous getImplementationBuffer() call
* current buffer successfully called file_segment->getOrSetDownloader() and became a downloader
* for this file segment. However, the downloader's term has a lifespan of 1 nextImpl() call,
* e.g. downloader reads buffer_size byte and calls completeBatchAndResetDownloader() and some other
* e.g. downloader reads buffer_size byte and calls completePartAndResetDownloader() and some other
* thread can become a downloader if it calls getOrSetDownloader() faster.
*
* So downloader is committed to download only buffer_size bytes and then is not a downloader anymore,
@ -817,11 +815,11 @@ bool CachedOnDiskReadBufferFromFile::nextImplStep()
if (need_complete_file_segment)
{
LOG_TEST(log, "Resetting downloader {} from scope exit", file_segment->getDownloader());
file_segment->completeBatchAndResetDownloader();
file_segment->completePartAndResetDownloader();
}
}
assert(!file_segment->isDownloader());
chassert(!file_segment->isDownloader());
}
catch (...)
{
@ -845,7 +843,7 @@ bool CachedOnDiskReadBufferFromFile::nextImplStep()
(*current_file_segment_it)->incrementHitsCount();
}
assert(!internal_buffer.empty());
chassert(!internal_buffer.empty());
swap(*implementation_buffer);
@ -854,15 +852,14 @@ bool CachedOnDiskReadBufferFromFile::nextImplStep()
LOG_TEST(
log,
"Current segment: {}, downloader: {}, current count: {}, position: {}, read range: {}",
current_read_range.toString(),
file_segment->getDownloader(),
"Current count: {}, position: {}, read range: {}, file segment: {}",
implementation_buffer->count(),
implementation_buffer->getPosition(),
implementation_buffer->getRemainingReadRange().toString());
implementation_buffer->getRemainingReadRange().toString(),
file_segment->getInfoForLog());
assert(current_read_range.left <= file_offset_of_buffer_end);
assert(current_read_range.right >= file_offset_of_buffer_end);
chassert(current_read_range.left <= file_offset_of_buffer_end);
chassert(current_read_range.right >= file_offset_of_buffer_end);
bool result = false;
size_t size = 0;
@ -939,24 +936,26 @@ bool CachedOnDiskReadBufferFromFile::nextImplStep()
{
if (download_current_segment)
{
assert(file_offset_of_buffer_end + size - 1 <= file_segment->range().right);
chassert(file_offset_of_buffer_end + size - 1 <= file_segment->range().right);
bool success = file_segment->reserve(size);
if (success)
{
assert(file_segment->getDownloadOffset() == static_cast<size_t>(implementation_buffer->getPosition()));
chassert(file_segment->getCurrentWriteOffset() == static_cast<size_t>(implementation_buffer->getPosition()));
success = writeCache(implementation_buffer->position(), size, file_offset_of_buffer_end, *file_segment);
if (success)
{
assert(file_segment->getDownloadOffset() <= file_segment->range().right + 1);
assert(
chassert(file_segment->getCurrentWriteOffset() <= file_segment->range().right + 1);
chassert(
std::next(current_file_segment_it) == file_segments_holder->file_segments.end()
|| file_segment->getDownloadOffset() == implementation_buffer->getFileOffsetOfBufferEnd());
|| file_segment->getCurrentWriteOffset() == implementation_buffer->getFileOffsetOfBufferEnd());
LOG_TEST(log, "Successfully written {} bytes", size);
}
else
{
assert(file_segment->state() == FileSegment::State::PARTIALLY_DOWNLOADED_NO_CONTINUATION);
chassert(file_segment->state() == FileSegment::State::PARTIALLY_DOWNLOADED_NO_CONTINUATION);
LOG_TEST(log, "Bypassing cache because writeCache method failed");
}
}
@ -984,7 +983,7 @@ bool CachedOnDiskReadBufferFromFile::nextImplStep()
size_t remaining_size_to_read
= std::min(current_read_range.right, read_until_position - 1) - file_offset_of_buffer_end + 1;
size = std::min(size, remaining_size_to_read);
assert(implementation_buffer->buffer().size() >= nextimpl_working_buffer_offset + size);
chassert(implementation_buffer->buffer().size() >= nextimpl_working_buffer_offset + size);
implementation_buffer->buffer().resize(nextimpl_working_buffer_offset + size);
}
@ -996,15 +995,15 @@ bool CachedOnDiskReadBufferFromFile::nextImplStep()
current_file_segment_counters.increment(ProfileEvents::FileSegmentUsedBytes, available());
if (download_current_segment)
file_segment->completeBatchAndResetDownloader();
file_segment->completePartAndResetDownloader();
assert(!file_segment->isDownloader());
chassert(!file_segment->isDownloader());
LOG_TEST(
log,
"Key: {}. Returning with {} bytes, buffer position: {} (offset: {}, predownloaded: {}), "
"buffer available: {}, current range: {}, current offset: {}, file segment state: {}, "
"download offset: {}, read_type: {}, reading until position: {}, started with offset: {}, "
"current write offset: {}, read_type: {}, reading until position: {}, started with offset: {}, "
"remaining ranges: {}",
getHexUIntLowercase(cache_key),
working_buffer.size(),
@ -1015,7 +1014,7 @@ bool CachedOnDiskReadBufferFromFile::nextImplStep()
current_read_range.toString(),
file_offset_of_buffer_end,
FileSegment::stateToString(file_segment->state()),
file_segment->getDownloadOffset(),
file_segment->getCurrentWriteOffset(),
toString(read_type),
read_until_position,
first_offset,

4
src/Disks/IO/CachedOnDiskReadBufferFromFile.h
View File

@ -80,7 +80,7 @@ private:
void assertCorrectness() const;
std::shared_ptr<ReadBufferFromFileBase> getRemoteFSReadBuffer(FileSegmentPtr & file_segment, ReadType read_type_);
std::shared_ptr<ReadBufferFromFileBase> getRemoteFSReadBuffer(FileSegment & file_segment, ReadType read_type_);
size_t getTotalSizeToRead();
@ -90,6 +90,8 @@ private:
bool writeCache(char * data, size_t size, size_t offset, FileSegment & file_segment);
static bool canStartFromCache(size_t current_offset, const FileSegment & file_segment);
Poco::Logger * log;
FileCache::Key cache_key;
String source_file_path;

9
src/Disks/IO/CachedOnDiskWriteBufferFromFile.cpp
View File

@ -77,7 +77,7 @@ void CachedOnDiskWriteBufferFromFile::nextImpl()
void CachedOnDiskWriteBufferFromFile::cacheData(char * data, size_t size)
{
if (stop_caching)
if (cache_in_error_state_or_disabled)
return;
if (!cache_writer)
@ -88,14 +88,13 @@ void CachedOnDiskWriteBufferFromFile::cacheData(char * data, size_t size)
Stopwatch watch(CLOCK_MONOTONIC);
cache_in_error_state_or_disabled = true;
try
{
if (!cache_writer->write(data, size, current_download_offset, is_persistent_cache_file))
{
LOG_INFO(log, "Write-through cache is stopped as cache limit is reached and nothing can be evicted");
/// No space left, disable caching.
stop_caching = true;
return;
}
}
@ -122,6 +121,8 @@ void CachedOnDiskWriteBufferFromFile::cacheData(char * data, size_t size)
current_file_segment_counters.increment(
ProfileEvents::FileSegmentWriteMicroseconds, watch.elapsedMicroseconds());
cache_in_error_state_or_disabled = false;
}
void CachedOnDiskWriteBufferFromFile::appendFilesystemCacheLog(const FileSegment & file_segment)

2
src/Disks/IO/CachedOnDiskWriteBufferFromFile.h
View File

@ -51,7 +51,7 @@ private:
bool enable_cache_log;
std::shared_ptr<FilesystemCacheLog> cache_log;
bool stop_caching = false;
bool cache_in_error_state_or_disabled = false;
ProfileEvents::Counters current_file_segment_counters;
std::unique_ptr<FileSegmentRangeWriter> cache_writer;

2
src/IO/ReadSettings.h
View File

@ -76,6 +76,8 @@ struct ReadSettings
/// For 'pread_threadpool' method. Lower is more priority.
size_t priority = 0;
bool load_marks_asynchronously = true;
size_t remote_fs_read_max_backoff_ms = 10000;
size_t remote_fs_read_backoff_max_tries = 4;

21
src/IO/ReadWriteBufferFromHTTP.h
View File

@ -26,6 +26,7 @@
#include <Common/config.h>
#include <Common/config_version.h>
#include <filesystem>
namespace ProfileEvents
{
@ -346,13 +347,29 @@ namespace detail
non_retriable_errors.begin(), non_retriable_errors.end(), [&](const auto status) { return http_status != status; });
}
Poco::URI getUriAfterRedirect(const Poco::URI & prev_uri, Poco::Net::HTTPResponse & response)
{
auto location = response.get("Location");
auto location_uri = Poco::URI(location);
if (!location_uri.isRelative())
return location_uri;
/// Location header contains relative path. So we need to concatenate it
/// with path from the original URI and normalize it.
auto path = std::filesystem::weakly_canonical(std::filesystem::path(prev_uri.getPath()) / location);
location_uri = prev_uri;
location_uri.setPath(path);
return location_uri;
}
void callWithRedirects(Poco::Net::HTTPResponse & response, const String & method_, bool throw_on_all_errors = false)
{
call(response, method_, throw_on_all_errors);
Poco::URI prev_uri = uri;
while (isRedirect(response.getStatus()))
{
Poco::URI uri_redirect(response.get("Location"));
Poco::URI uri_redirect = getUriAfterRedirect(prev_uri, response);
prev_uri = uri_redirect;
if (remote_host_filter)
remote_host_filter->checkURL(uri_redirect);
@ -408,7 +425,7 @@ namespace detail
while (isRedirect(response.getStatus()))
{
Poco::URI uri_redirect(response.get("Location"));
Poco::URI uri_redirect = getUriAfterRedirect(saved_uri_redirect.value_or(uri), response);
if (remote_host_filter)
remote_host_filter->checkURL(uri_redirect);

150
src/Interpreters/Cache/FileCache.cpp
View File

@ -122,7 +122,6 @@ void FileCache::initialize()
fs::create_directories(cache_base_path);
}
status_file = make_unique<StatusFile>(fs::path(cache_base_path) / "status", StatusFile::write_full_info);
is_initialized = true;
}
}
@ -258,7 +257,7 @@ FileSegments FileCache::splitRangeIntoCells(
size_t offset,
size_t size,
FileSegment::State state,
bool is_persistent,
const CreateFileSegmentSettings & settings,
std::lock_guard<std::mutex> & cache_lock)
{
assert(size > 0);
@ -275,7 +274,7 @@ FileSegments FileCache::splitRangeIntoCells(
current_cell_size = std::min(remaining_size, max_file_segment_size);
remaining_size -= current_cell_size;
auto * cell = addCell(key, current_pos, current_cell_size, state, is_persistent, cache_lock);
auto * cell = addCell(key, current_pos, current_cell_size, state, settings, cache_lock);
if (cell)
file_segments.push_back(cell->file_segment);
assert(cell);
@ -292,7 +291,7 @@ void FileCache::fillHolesWithEmptyFileSegments(
const Key & key,
const FileSegment::Range & range,
bool fill_with_detached_file_segments,
bool is_persistent,
const CreateFileSegmentSettings & settings,
std::lock_guard<std::mutex> & cache_lock)
{
/// There are segments [segment1, ..., segmentN]
@ -339,16 +338,16 @@ void FileCache::fillHolesWithEmptyFileSegments(
if (fill_with_detached_file_segments)
{
auto file_segment = std::make_shared<FileSegment>(current_pos, hole_size, key, this, FileSegment::State::EMPTY);
auto file_segment = std::make_shared<FileSegment>(current_pos, hole_size, key, this, FileSegment::State::EMPTY, settings);
{
std::lock_guard segment_lock(file_segment->mutex);
file_segment->markAsDetached(segment_lock);
std::unique_lock segment_lock(file_segment->mutex);
file_segment->detachAssumeStateFinalized(segment_lock);
}
file_segments.insert(it, file_segment);
}
else
{
file_segments.splice(it, splitRangeIntoCells(key, current_pos, hole_size, FileSegment::State::EMPTY, is_persistent, cache_lock));
file_segments.splice(it, splitRangeIntoCells(key, current_pos, hole_size, FileSegment::State::EMPTY, settings, cache_lock));
}
current_pos = segment_range.right + 1;
@ -366,22 +365,23 @@ void FileCache::fillHolesWithEmptyFileSegments(
if (fill_with_detached_file_segments)
{
auto file_segment = std::make_shared<FileSegment>(current_pos, hole_size, key, this, FileSegment::State::EMPTY);
auto file_segment = std::make_shared<FileSegment>(current_pos, hole_size, key, this, FileSegment::State::EMPTY, settings);
{
std::lock_guard segment_lock(file_segment->mutex);
file_segment->markAsDetached(segment_lock);
std::unique_lock segment_lock(file_segment->mutex);
file_segment->detachAssumeStateFinalized(segment_lock);
}
file_segments.insert(file_segments.end(), file_segment);
}
else
{
file_segments.splice(
file_segments.end(), splitRangeIntoCells(key, current_pos, hole_size, FileSegment::State::EMPTY, is_persistent, cache_lock));
file_segments.end(),
splitRangeIntoCells(key, current_pos, hole_size, FileSegment::State::EMPTY, settings, cache_lock));
}
}
}
FileSegmentsHolder FileCache::getOrSet(const Key & key, size_t offset, size_t size, bool is_persistent)
FileSegmentsHolder FileCache::getOrSet(const Key & key, size_t offset, size_t size, const CreateFileSegmentSettings & settings)
{
std::lock_guard cache_lock(mutex);
@ -398,11 +398,11 @@ FileSegmentsHolder FileCache::getOrSet(const Key & key, size_t offset, size_t si
if (file_segments.empty())
{
file_segments = splitRangeIntoCells(key, offset, size, FileSegment::State::EMPTY, is_persistent, cache_lock);
file_segments = splitRangeIntoCells(key, offset, size, FileSegment::State::EMPTY, settings, cache_lock);
}
else
{
fillHolesWithEmptyFileSegments(file_segments, key, range, /* fill_with_detached */false, is_persistent, cache_lock);
fillHolesWithEmptyFileSegments(file_segments, key, range, /* fill_with_detached */false, settings, cache_lock);
}
assert(!file_segments.empty());
@ -426,16 +426,17 @@ FileSegmentsHolder FileCache::get(const Key & key, size_t offset, size_t size)
if (file_segments.empty())
{
auto file_segment = std::make_shared<FileSegment>(offset, size, key, this, FileSegment::State::EMPTY);
auto file_segment = std::make_shared<FileSegment>(
offset, size, key, this, FileSegment::State::EMPTY, CreateFileSegmentSettings{});
{
std::lock_guard segment_lock(file_segment->mutex);
file_segment->markAsDetached(segment_lock);
std::unique_lock segment_lock(file_segment->mutex);
file_segment->detachAssumeStateFinalized(segment_lock);
}
file_segments = { file_segment };
}
else
{
fillHolesWithEmptyFileSegments(file_segments, key, range, /* fill_with_detached */true, /* is_persistent */false, cache_lock);
fillHolesWithEmptyFileSegments(file_segments, key, range, /* fill_with_detached */true, {}, cache_lock);
}
return FileSegmentsHolder(std::move(file_segments));
@ -443,7 +444,7 @@ FileSegmentsHolder FileCache::get(const Key & key, size_t offset, size_t size)
FileCache::FileSegmentCell * FileCache::addCell(
const Key & key, size_t offset, size_t size,
FileSegment::State state, bool is_persistent,
FileSegment::State state, const CreateFileSegmentSettings & settings,
std::lock_guard<std::mutex> & cache_lock)
{
/// Create a file segment cell and put it in `files` map by [key][offset].
@ -475,18 +476,23 @@ FileCache::FileSegmentCell * FileCache::addCell(
stash_records.erase({remove_priority_iter->key(), remove_priority_iter->offset()});
remove_priority_iter->removeAndGetNext(cache_lock);
}
/// For segments that do not reach the download threshold, we do not download them, but directly read them
/// For segments that do not reach the download threshold,
/// we do not download them, but directly read them
result_state = FileSegment::State::SKIP_CACHE;
}
else
{
auto priority_iter = record->second;
priority_iter->use(cache_lock);
result_state = priority_iter->hits() >= enable_cache_hits_threshold ? FileSegment::State::EMPTY : FileSegment::State::SKIP_CACHE;
result_state = priority_iter->hits() >= enable_cache_hits_threshold
? FileSegment::State::EMPTY
: FileSegment::State::SKIP_CACHE;
}
}
return std::make_shared<FileSegment>(offset, size, key, this, result_state, is_persistent);
return std::make_shared<FileSegment>(offset, size, key, this, result_state, settings);
};
FileSegmentCell cell(skip_or_download(), this, cache_lock);
@ -495,6 +501,7 @@ FileCache::FileSegmentCell * FileCache::addCell(
if (offsets.empty())
{
auto key_path = getPathInLocalCache(key);
if (!fs::exists(key_path))
fs::create_directories(key_path);
}
@ -513,7 +520,7 @@ FileSegmentPtr FileCache::createFileSegmentForDownload(
const Key & key,
size_t offset,
size_t size,
bool is_persistent,
const CreateFileSegmentSettings & settings,
std::lock_guard<std::mutex> & cache_lock)
{
#ifndef NDEBUG
@ -530,7 +537,7 @@ FileSegmentPtr FileCache::createFileSegmentForDownload(
"Cache cell already exists for key `{}` and offset {}",
key.toString(), offset);
cell = addCell(key, offset, size, FileSegment::State::EMPTY, is_persistent, cache_lock);
cell = addCell(key, offset, size, FileSegment::State::EMPTY, settings, cache_lock);
if (!cell)
throw Exception(ErrorCodes::LOGICAL_ERROR, "Failed to add a new cell for download");
@ -542,18 +549,21 @@ bool FileCache::tryReserve(const Key & key, size_t offset, size_t size, std::loc
{
auto query_context = enable_filesystem_query_cache_limit ? getCurrentQueryContext(cache_lock) : nullptr;
if (!query_context)
{
return tryReserveForMainList(key, offset, size, nullptr, cache_lock);
}
/// The maximum cache capacity of the request is not reached, thus the
//// cache block is evicted from the main LRU queue by tryReserveForMainList().
else if (query_context->getCacheSize() + size <= query_context->getMaxCacheSize())
{
return tryReserveForMainList(key, offset, size, query_context, cache_lock);
}
/// When skip_download_if_exceeds_query_cache is true, there is no need
/// to evict old data, skip the cache and read directly from remote fs.
else if (query_context->isSkipDownloadIfExceed())
{
return false;
}
/// The maximum cache size of the query is reached, the cache will be
/// evicted from the history cache accessed by the current query.
else
@ -833,7 +843,7 @@ void FileCache::removeIfExists(const Key & key)
auto file_segment = cell->file_segment;
if (file_segment)
{
std::lock_guard<std::mutex> segment_lock(file_segment->mutex);
std::unique_lock<std::mutex> segment_lock(file_segment->mutex);
file_segment->detach(cache_lock, segment_lock);
remove(file_segment->key(), file_segment->offset(), cache_lock, segment_lock);
}
@ -863,9 +873,11 @@ void FileCache::removeIfReleasable()
auto * cell = getCell(key, offset, cache_lock);
if (!cell)
{
throw Exception(
ErrorCodes::LOGICAL_ERROR,
"Cache is in inconsistent state: LRU queue contains entries with no cache cell");
}
if (cell->releasable())
{
@ -880,7 +892,7 @@ void FileCache::removeIfReleasable()
for (auto & file_segment : to_remove)
{
std::lock_guard segment_lock(file_segment->mutex);
std::unique_lock segment_lock(file_segment->mutex);
file_segment->detach(cache_lock, segment_lock);
remove(file_segment->key(), file_segment->offset(), cache_lock, segment_lock);
}
@ -896,13 +908,13 @@ void FileCache::removeIfReleasable()
void FileCache::remove(FileSegmentPtr file_segment, std::lock_guard<std::mutex> & cache_lock)
{
std::lock_guard segment_lock(file_segment->mutex);
std::unique_lock segment_lock(file_segment->mutex);
remove(file_segment->key(), file_segment->offset(), cache_lock, segment_lock);
}
void FileCache::remove(
Key key, size_t offset,
std::lock_guard<std::mutex> & cache_lock, std::lock_guard<std::mutex> & /* segment_lock */)
std::lock_guard<std::mutex> & cache_lock, std::unique_lock<std::mutex> & /* segment_lock */)
{
LOG_DEBUG(log, "Remove from cache. Key: {}, offset: {}", key.toString(), offset);
@ -976,7 +988,7 @@ void FileCache::loadCacheInfoIntoMemory(std::lock_guard<std::mutex> & cache_lock
{
if (!key_it->is_directory())
{
LOG_DEBUG(log, "Unexpected file {} (not a directory), will skip it", key_it->path().string());
LOG_DEBUG(log, "Unexpected file: {}. Expected a directory", key_it->path().string());
continue;
}
@ -1012,7 +1024,10 @@ void FileCache::loadCacheInfoIntoMemory(std::lock_guard<std::mutex> & cache_lock
if (tryReserve(key, offset, size, cache_lock))
{
auto * cell = addCell(key, offset, size, FileSegment::State::DOWNLOADED, is_persistent, cache_lock);
auto * cell = addCell(
key, offset, size, FileSegment::State::DOWNLOADED,
CreateFileSegmentSettings{ .is_persistent = is_persistent }, cache_lock);
if (cell)
queue_entries.emplace_back(cell->queue_iterator, cell->file_segment);
}
@ -1049,7 +1064,7 @@ void FileCache::loadCacheInfoIntoMemory(std::lock_guard<std::mutex> & cache_lock
void FileCache::reduceSizeToDownloaded(
const Key & key, size_t offset,
std::lock_guard<std::mutex> & cache_lock, std::lock_guard<std::mutex> & /* segment_lock */)
std::lock_guard<std::mutex> & cache_lock, std::unique_lock<std::mutex> & segment_lock)
{
/**
* In case file was partially downloaded and it's download cannot be continued
@ -1069,20 +1084,25 @@ void FileCache::reduceSizeToDownloaded(
const auto & file_segment = cell->file_segment;
size_t downloaded_size = file_segment->downloaded_size;
if (downloaded_size == file_segment->range().size())
size_t full_size = file_segment->range().size();
if (downloaded_size == full_size)
{
throw Exception(
ErrorCodes::LOGICAL_ERROR,
"Nothing to reduce, file segment fully downloaded, key: {}, offset: {}",
key.toString(), offset);
"Nothing to reduce, file segment fully downloaded: {}",
file_segment->getInfoForLogUnlocked(segment_lock));
}
cell->file_segment = std::make_shared<FileSegment>(offset, downloaded_size, key, this, FileSegment::State::DOWNLOADED);
cell->file_segment = std::make_shared<FileSegment>(
offset, downloaded_size, key, this, FileSegment::State::DOWNLOADED, CreateFileSegmentSettings{});
assert(file_segment->reserved_size == downloaded_size);
}
bool FileCache::isLastFileSegmentHolder(
const Key & key, size_t offset,
std::lock_guard<std::mutex> & cache_lock, std::lock_guard<std::mutex> & /* segment_lock */)
std::lock_guard<std::mutex> & cache_lock, std::unique_lock<std::mutex> & /* segment_lock */)
{
auto * cell = getCell(key, offset, cache_lock);
@ -1167,7 +1187,8 @@ FileCache::FileSegmentCell::FileSegmentCell(
{
case FileSegment::State::DOWNLOADED:
{
queue_iterator = cache->main_priority->add(file_segment->key(), file_segment->offset(), file_segment->range().size(), cache_lock);
queue_iterator = cache->main_priority->add(
file_segment->key(), file_segment->offset(), file_segment->range().size(), cache_lock);
break;
}
case FileSegment::State::SKIP_CACHE:
@ -1246,14 +1267,41 @@ void FileCache::assertPriorityCorrectness(std::lock_guard<std::mutex> & cache_lo
ErrorCodes::LOGICAL_ERROR,
"Cache is in inconsistent state: LRU queue contains entries with no cache cell (assertCorrectness())");
}
assert(cell->size() == size);
if (cell->size() != size)
{
throw Exception(
ErrorCodes::LOGICAL_ERROR,
"Expected {} == {} size ({})",
cell->size(), size, cell->file_segment->getInfoForLog());
}
total_size += size;
}
assert(total_size == main_priority->getCacheSize(cache_lock));
assert(main_priority->getCacheSize(cache_lock) <= max_size);
assert(main_priority->getElementsNum(cache_lock) <= max_element_size);
}
FileCache::QueryContextHolder::QueryContextHolder(
const String & query_id_,
FileCache * cache_,
FileCache::QueryContextPtr context_)
: query_id(query_id_)
, cache(cache_)
, context(context_)
{
}
FileCache::QueryContextHolder::~QueryContextHolder()
{
/// If only the query_map and the current holder hold the context_query,
/// the query has been completed and the query_context is released.
if (context && context.use_count() == 2)
cache->removeQueryContext(query_id);
}
FileCache::QueryContextPtr FileCache::getCurrentQueryContext(std::lock_guard<std::mutex> & cache_lock)
{
if (!isQueryInitialized())
@ -1362,22 +1410,4 @@ void FileCache::QueryContext::use(const Key & key, size_t offset, std::lock_guar
record->second->use(cache_lock);
}
FileCache::QueryContextHolder::QueryContextHolder(
const String & query_id_,
FileCache * cache_,
FileCache::QueryContextPtr context_)
: query_id(query_id_)
, cache(cache_)
, context(context_)
{
}
FileCache::QueryContextHolder::~QueryContextHolder()
{
/// If only the query_map and the current holder hold the context_query,
/// the query has been completed and the query_context is released.
if (context && context.use_count() == 2)
cache->removeQueryContext(query_id);
}
}

44
src/Interpreters/Cache/FileCache.h
View File

@ -12,13 +12,14 @@
#include <boost/noncopyable.hpp>
#include <Core/Types.h>
#include <Common/logger_useful.h>
#include <Common/ThreadPool.h>
#include <IO/ReadSettings.h>
#include <Interpreters/Cache/IFileCachePriority.h>
#include <Interpreters/Cache/FileCacheKey.h>
#include <Interpreters/Cache/FileCache_fwd.h>
#include <Interpreters/Cache/FileSegment.h>
#include <Interpreters/Cache/IFileCachePriority.h>
#include <Common/logger_useful.h>
#include <Interpreters/Cache/FileCacheKey.h>
#include <Common/StatusFile.h>
namespace DB
{
@ -43,7 +44,6 @@ public:
~FileCache() = default;
/// Restore cache from local filesystem.
void initialize();
const String & getBasePath() const { return cache_base_path; }
@ -59,7 +59,7 @@ public:
* As long as pointers to returned file segments are hold
* it is guaranteed that these file segments are not removed from cache.
*/
FileSegmentsHolder getOrSet(const Key & key, size_t offset, size_t size, bool is_persistent);
FileSegmentsHolder getOrSet(const Key & key, size_t offset, size_t size, const CreateFileSegmentSettings & settings);
/**
* Segments in returned list are ordered in ascending order and represent a full contiguous
@ -104,7 +104,7 @@ public:
const Key & key,
size_t offset,
size_t size,
bool is_persistent,
const CreateFileSegmentSettings & create_settings,
std::lock_guard<std::mutex> & cache_lock);
FileSegments getSnapshot() const;
@ -132,21 +132,21 @@ public:
private:
String cache_base_path;
size_t max_size;
size_t max_element_size;
size_t max_file_segment_size;
const size_t max_size;
const size_t max_element_size;
const size_t max_file_segment_size;
bool allow_persistent_files;
size_t enable_cache_hits_threshold;
bool enable_filesystem_query_cache_limit;
const bool allow_persistent_files;
const size_t enable_cache_hits_threshold;
const bool enable_filesystem_query_cache_limit;
mutable std::mutex mutex;
Poco::Logger * log;
bool is_initialized = false;
std::exception_ptr initialization_exception;
std::unique_ptr<StatusFile> status_file;
mutable std::mutex mutex;
void assertInitialized(std::lock_guard<std::mutex> & cache_lock) const;
bool tryReserve(const Key & key, size_t offset, size_t size, std::lock_guard<std::mutex> & cache_lock);
@ -154,7 +154,7 @@ private:
Key key,
size_t offset,
std::lock_guard<std::mutex> & cache_lock,
std::lock_guard<std::mutex> & segment_lock);
std::unique_lock<std::mutex> & segment_lock);
void remove(
FileSegmentPtr file_segment,
@ -164,15 +164,13 @@ private:
const Key & key,
size_t offset,
std::lock_guard<std::mutex> & cache_lock,
std::lock_guard<std::mutex> & segment_lock);
std::unique_lock<std::mutex> & segment_lock);
void reduceSizeToDownloaded(
const Key & key,
size_t offset,
std::lock_guard<std::mutex> & cache_lock,
std::lock_guard<std::mutex> & segment_lock);
void assertInitialized(std::lock_guard<std::mutex> & cache_lock) const;
std::unique_lock<std::mutex> & segment_lock);
struct FileSegmentCell : private boost::noncopyable
{
@ -225,7 +223,7 @@ private:
size_t offset,
size_t size,
FileSegment::State state,
bool is_persistent,
const CreateFileSegmentSettings & create_settings,
std::lock_guard<std::mutex> & cache_lock);
static void useCell(const FileSegmentCell & cell, FileSegments & result, std::lock_guard<std::mutex> & cache_lock);
@ -242,7 +240,7 @@ private:
size_t offset,
size_t size,
FileSegment::State state,
bool is_persistent,
const CreateFileSegmentSettings & create_settings,
std::lock_guard<std::mutex> & cache_lock);
String dumpStructureUnlocked(const Key & key_, std::lock_guard<std::mutex> & cache_lock);
@ -252,7 +250,7 @@ private:
const Key & key,
const FileSegment::Range & range,
bool fill_with_detached_file_segments,
bool is_persistent,
const CreateFileSegmentSettings & settings,
std::lock_guard<std::mutex> & cache_lock);
size_t getUsedCacheSizeUnlocked(std::lock_guard<std::mutex> & cache_lock) const;

1
src/Interpreters/Cache/FileCache_fwd.h
View File

@ -12,5 +12,6 @@ class FileCache;
using FileCachePtr = std::shared_ptr<FileCache>;
struct FileCacheSettings;
struct CreateFileSegmentSettings;
}

556
src/Interpreters/Cache/FileSegment.cpp
View File

@ -1,10 +1,10 @@
#include "FileSegment.h"
#include <base/getThreadId.h>
#include <base/scope_guard.h>
#include <Common/scope_guard_safe.h>
#include <Common/hex.h>
#include <Common/logger_useful.h>
#include <Interpreters/Cache/FileCache.h>
#include <Common/hex.h>
#include <IO/WriteBufferFromString.h>
#include <IO/Operators.h>
#include <filesystem>
@ -29,7 +29,7 @@ FileSegment::FileSegment(
const Key & key_,
FileCache * cache_,
State download_state_,
bool is_persistent_)
const CreateFileSegmentSettings & settings)
: segment_range(offset_, offset_ + size_ - 1)
, download_state(download_state_)
, file_key(key_)
@ -39,7 +39,7 @@ FileSegment::FileSegment(
#else
, log(&Poco::Logger::get("FileSegment"))
#endif
, is_persistent(is_persistent_)
, is_persistent(settings.is_persistent)
{
/// On creation, file segment state can be EMPTY, DOWNLOADED, DOWNLOADING.
switch (download_state)
@ -64,50 +64,79 @@ FileSegment::FileSegment(
}
default:
{
throw Exception(ErrorCodes::REMOTE_FS_OBJECT_CACHE_ERROR, "Can create cell with either EMPTY, DOWNLOADED, DOWNLOADING state");
throw Exception(
ErrorCodes::REMOTE_FS_OBJECT_CACHE_ERROR,
"Can create cell with either EMPTY, DOWNLOADED, DOWNLOADING state");
}
}
}
String FileSegment::getPathInLocalCache() const
{
return cache->getPathInLocalCache(key(), offset(), isPersistent());
}
FileSegment::State FileSegment::state() const
{
std::lock_guard segment_lock(mutex);
std::unique_lock segment_lock(mutex);
return download_state;
}
size_t FileSegment::getDownloadOffset() const
void FileSegment::setDownloadState(State state)
{
LOG_TEST(log, "Updated state from {} to {}", stateToString(download_state), stateToString(state));
download_state = state;
}
size_t FileSegment::getFirstNonDownloadedOffset() const
{
std::unique_lock segment_lock(mutex);
return getFirstNonDownloadedOffsetUnlocked(segment_lock);
}
size_t FileSegment::getFirstNonDownloadedOffsetUnlocked(std::unique_lock<std::mutex> & segment_lock) const
{
std::lock_guard segment_lock(mutex);
return range().left + getDownloadedSizeUnlocked(segment_lock);
}
size_t FileSegment::getCurrentWriteOffset() const
{
std::unique_lock segment_lock(mutex);
return getCurrentWriteOffsetUnlocked(segment_lock);
}
size_t FileSegment::getCurrentWriteOffsetUnlocked(std::unique_lock<std::mutex> & segment_lock) const
{
return getFirstNonDownloadedOffsetUnlocked(segment_lock);
}
size_t FileSegment::getDownloadedSize() const
{
std::lock_guard segment_lock(mutex);
std::unique_lock segment_lock(mutex);
return getDownloadedSizeUnlocked(segment_lock);
}
size_t FileSegment::getRemainingSizeToDownload() const
{
std::lock_guard segment_lock(mutex);
return range().size() - getDownloadedSizeUnlocked(segment_lock);
}
bool FileSegment::isDetached() const
{
std::lock_guard segment_lock(mutex);
return is_detached;
}
size_t FileSegment::getDownloadedSizeUnlocked(std::lock_guard<std::mutex> & /* segment_lock */) const
size_t FileSegment::getDownloadedSizeUnlocked(std::unique_lock<std::mutex> & /* segment_lock */) const
{
if (download_state == State::DOWNLOADED)
return downloaded_size;
std::lock_guard download_lock(download_mutex);
std::unique_lock download_lock(download_mutex);
return downloaded_size;
}
size_t FileSegment::getRemainingSizeToDownload() const
{
std::unique_lock segment_lock(mutex);
return range().size() - getDownloadedSizeUnlocked(segment_lock);
}
bool FileSegment::isDownloaded() const
{
std::lock_guard segment_lock(mutex);
return is_downloaded;
}
String FileSegment::getCallerId()
{
if (!CurrentThread::isInitialized()
@ -118,84 +147,106 @@ String FileSegment::getCallerId()
return std::string(CurrentThread::getQueryId()) + ":" + toString(getThreadId());
}
String FileSegment::getDownloader() const
{
std::unique_lock segment_lock(mutex);
return getDownloaderUnlocked(segment_lock);
}
String FileSegment::getDownloaderUnlocked(std::unique_lock<std::mutex> & /* segment_lock */) const
{
return downloader_id;
}
String FileSegment::getOrSetDownloader()
{
std::lock_guard segment_lock(mutex);
std::unique_lock segment_lock(mutex);
assertNotDetached(segment_lock);
assertNotDetachedUnlocked(segment_lock);
if (downloader_id.empty())
auto current_downloader = getDownloaderUnlocked(segment_lock);
if (current_downloader.empty())
{
assert(download_state != State::DOWNLOADING);
bool allow_new_downloader = download_state == State::EMPTY || download_state == State::PARTIALLY_DOWNLOADED;
if (!allow_new_downloader)
return "notAllowed:" + stateToString(download_state);
if (download_state != State::EMPTY
&& download_state != State::PARTIALLY_DOWNLOADED)
return "None";
downloader_id = getCallerId();
download_state = State::DOWNLOADING;
current_downloader = downloader_id = getCallerId();
setDownloadState(State::DOWNLOADING);
}
else if (downloader_id == getCallerId())
throw Exception(ErrorCodes::REMOTE_FS_OBJECT_CACHE_ERROR,
"Attempt to set the same downloader for segment {} for the second time", range().toString());
return downloader_id;
return current_downloader;
}
void FileSegment::resetDownloadingStateUnlocked([[maybe_unused]] std::unique_lock<std::mutex> & segment_lock)
{
assert(isDownloaderUnlocked(segment_lock));
assert(download_state == State::DOWNLOADING);
size_t current_downloaded_size = getDownloadedSizeUnlocked(segment_lock);
/// range().size() can equal 0 in case of write-though cache.
if (current_downloaded_size != 0 && current_downloaded_size == range().size())
setDownloadedUnlocked(segment_lock);
else
setDownloadState(State::PARTIALLY_DOWNLOADED);
}
void FileSegment::resetDownloader()
{
std::lock_guard segment_lock(mutex);
std::unique_lock segment_lock(mutex);
assertNotDetached(segment_lock);
assertNotDetachedUnlocked(segment_lock);
assertIsDownloaderUnlocked("resetDownloader", segment_lock);
if (downloader_id.empty())
throw Exception(ErrorCodes::REMOTE_FS_OBJECT_CACHE_ERROR, "There is no downloader");
if (getCallerId() != downloader_id)
throw Exception(ErrorCodes::REMOTE_FS_OBJECT_CACHE_ERROR, "Downloader can be reset only by downloader");
resetDownloaderImpl(segment_lock);
resetDownloadingStateUnlocked(segment_lock);
resetDownloaderUnlocked(segment_lock);
}
void FileSegment::resetDownloaderImpl(std::lock_guard<std::mutex> & segment_lock)
void FileSegment::resetDownloaderUnlocked(std::unique_lock<std::mutex> & /* segment_lock */)
{
if (getDownloadedSizeUnlocked(segment_lock) == range().size())
setDownloaded(segment_lock);
else
download_state = State::PARTIALLY_DOWNLOADED;
LOG_TEST(log, "Resetting downloader from {}", downloader_id);
downloader_id.clear();
}
String FileSegment::getDownloader() const
void FileSegment::assertIsDownloaderUnlocked(const std::string & operation, std::unique_lock<std::mutex> & segment_lock) const
{
std::lock_guard segment_lock(mutex);
return downloader_id;
auto caller = getCallerId();
auto current_downloader = getDownloaderUnlocked(segment_lock);
LOG_TEST(log, "Downloader id: {}, caller id: {}", current_downloader, caller);
if (caller != current_downloader)
{
throw Exception(
ErrorCodes::LOGICAL_ERROR,
"Operation `{}` can be done only by downloader. "
"(CallerId: {}, downloader id: {})",
operation, caller, downloader_id);
}
}
bool FileSegment::isDownloader() const
{
std::lock_guard segment_lock(mutex);
return getCallerId() == downloader_id;
std::unique_lock segment_lock(mutex);
return isDownloaderUnlocked(segment_lock);
}
bool FileSegment::isDownloaderImpl(std::lock_guard<std::mutex> & /* segment_lock */) const
bool FileSegment::isDownloaderUnlocked(std::unique_lock<std::mutex> & segment_lock) const
{
return getCallerId() == downloader_id;
return getCallerId() == getDownloaderUnlocked(segment_lock);
}
FileSegment::RemoteFileReaderPtr FileSegment::getRemoteFileReader()
{
if (!isDownloader())
throw Exception(ErrorCodes::REMOTE_FS_OBJECT_CACHE_ERROR, "Only downloader can use remote filesystem file reader");
std::unique_lock segment_lock(mutex);
assertIsDownloaderUnlocked("getRemoteFileReader", segment_lock);
return remote_file_reader;
}
FileSegment::RemoteFileReaderPtr FileSegment::extractRemoteFileReader()
{
std::lock_guard cache_lock(cache->mutex);
std::lock_guard segment_lock(mutex);
std::unique_lock segment_lock(mutex);
if (!is_detached)
{
@ -210,8 +261,8 @@ FileSegment::RemoteFileReaderPtr FileSegment::extractRemoteFileReader()
void FileSegment::setRemoteFileReader(RemoteFileReaderPtr remote_file_reader_)
{
if (!isDownloader())
throw Exception(ErrorCodes::REMOTE_FS_OBJECT_CACHE_ERROR, "Only downloader can use remote filesystem file reader");
std::unique_lock segment_lock(mutex);
assertIsDownloaderUnlocked("setRemoteFileReader", segment_lock);
if (remote_file_reader)
throw Exception(ErrorCodes::LOGICAL_ERROR, "Remote file reader already exists");
@ -221,8 +272,8 @@ void FileSegment::setRemoteFileReader(RemoteFileReaderPtr remote_file_reader_)
void FileSegment::resetRemoteFileReader()
{
if (!isDownloader())
throw Exception(ErrorCodes::REMOTE_FS_OBJECT_CACHE_ERROR, "Only downloader can use remote filesystem file reader");
std::unique_lock segment_lock(mutex);
assertIsDownloaderUnlocked("resetRemoteFileReader", segment_lock);
if (!remote_file_reader)
throw Exception(ErrorCodes::LOGICAL_ERROR, "Remote file reader does not exist");
@ -230,55 +281,59 @@ void FileSegment::resetRemoteFileReader()
remote_file_reader.reset();
}
void FileSegment::write(const char * from, size_t size, size_t offset_)
void FileSegment::write(const char * from, size_t size, size_t offset)
{
if (!size)
throw Exception(ErrorCodes::REMOTE_FS_OBJECT_CACHE_ERROR, "Writing zero size is not allowed");
if (availableSize() < size)
throw Exception(
ErrorCodes::REMOTE_FS_OBJECT_CACHE_ERROR,
"Not enough space is reserved. Available: {}, expected: {}", availableSize(), size);
if (!isDownloader())
throw Exception(
ErrorCodes::LOGICAL_ERROR,
"Only downloader can do the downloading. (CallerId: {}, DownloaderId: {})",
getCallerId(), downloader_id);
if (getDownloadedSize() == range().size())
throw Exception(
ErrorCodes::REMOTE_FS_OBJECT_CACHE_ERROR,
"Attempt to write {} bytes to offset: {}, but current file segment is already fully downloaded",
size, offset_);
auto download_offset = range().left + downloaded_size;
if (offset_ != download_offset)
throw Exception(ErrorCodes::REMOTE_FS_OBJECT_CACHE_ERROR,
"Attempt to write {} bytes to offset: {}, but current download offset is {}",
size, offset_, download_offset);
{
std::lock_guard segment_lock(mutex);
assertNotDetached(segment_lock);
}
std::unique_lock segment_lock(mutex);
if (!cache_writer)
{
if (downloaded_size > 0)
throw Exception(ErrorCodes::LOGICAL_ERROR,
"Cache writer was finalized (downloaded size: {}, state: {})",
downloaded_size, stateToString(download_state));
assertIsDownloaderUnlocked("write", segment_lock);
assertNotDetachedUnlocked(segment_lock);
auto download_path = getPathInLocalCache();
cache_writer = std::make_unique<WriteBufferFromFile>(download_path);
if (download_state != State::DOWNLOADING)
throw Exception(
ErrorCodes::LOGICAL_ERROR,
"Expected DOWNLOADING state, got {}", stateToString(download_state));
size_t first_non_downloaded_offset = getFirstNonDownloadedOffsetUnlocked(segment_lock);
if (offset != first_non_downloaded_offset)
throw Exception(
ErrorCodes::REMOTE_FS_OBJECT_CACHE_ERROR,
"Attempt to write {} bytes to offset: {}, but current write offset is {}",
size, offset, first_non_downloaded_offset);
size_t current_downloaded_size = getDownloadedSizeUnlocked(segment_lock);
chassert(reserved_size >= current_downloaded_size);
size_t free_reserved_size = reserved_size - current_downloaded_size;
if (free_reserved_size < size)
throw Exception(
ErrorCodes::REMOTE_FS_OBJECT_CACHE_ERROR,
"Not enough space is reserved. Available: {}, expected: {}", free_reserved_size, size);
if (current_downloaded_size == range().size())
throw Exception(ErrorCodes::LOGICAL_ERROR, "File segment is already fully downloaded");
if (!cache_writer)
{
if (current_downloaded_size > 0)
throw Exception(
ErrorCodes::LOGICAL_ERROR,
"Cache writer was finalized (downloaded size: {}, state: {})",
current_downloaded_size, stateToString(download_state));
auto download_path = getPathInLocalCache();
cache_writer = std::make_unique<WriteBufferFromFile>(download_path);
}
}
try
{
cache_writer->write(from, size);
std::lock_guard download_lock(download_mutex);
std::unique_lock download_lock(download_mutex);
cache_writer->next();
@ -286,23 +341,20 @@ void FileSegment::write(const char * from, size_t size, size_t offset_)
}
catch (Exception & e)
{
std::lock_guard segment_lock(mutex);
std::unique_lock segment_lock(mutex);
wrapWithCacheInfo(e, "while writing into cache", segment_lock);
setDownloadFailed(segment_lock);
setDownloadFailedUnlocked(segment_lock);
cv.notify_all();
throw;
}
assert(getDownloadOffset() == offset_ + size);
}
String FileSegment::getPathInLocalCache() const
{
return cache->getPathInLocalCache(key(), offset(), isPersistent());
#ifndef NDEBUG
chassert(getFirstNonDownloadedOffset() == offset + size);
#endif
}
FileSegment::State FileSegment::wait()
@ -324,8 +376,8 @@ FileSegment::State FileSegment::wait()
{
LOG_TEST(log, "{} waiting on: {}, current downloader: {}", getCallerId(), range().toString(), downloader_id);
assert(!downloader_id.empty());
assert(downloader_id != getCallerId());
chassert(!getDownloaderUnlocked(segment_lock).empty());
chassert(!isDownloaderUnlocked(segment_lock));
cv.wait_for(segment_lock, std::chrono::seconds(60));
}
@ -338,30 +390,23 @@ bool FileSegment::reserve(size_t size_to_reserve)
if (!size_to_reserve)
throw Exception(ErrorCodes::REMOTE_FS_OBJECT_CACHE_ERROR, "Zero space reservation is not allowed");
size_t expected_downloaded_size;
{
std::lock_guard segment_lock(mutex);
assertNotDetached(segment_lock);
std::unique_lock segment_lock(mutex);
auto caller_id = getCallerId();
bool is_downloader = caller_id == downloader_id;
if (!is_downloader)
{
throw Exception(
ErrorCodes::LOGICAL_ERROR,
"Space can be reserved only by downloader (current: {}, expected: {})",
caller_id, downloader_id);
}
assertNotDetachedUnlocked(segment_lock);
assertIsDownloaderUnlocked("reserve", segment_lock);
size_t current_downloaded_size = getDownloadedSizeUnlocked(segment_lock);
if (current_downloaded_size + size_to_reserve > range().size())
{
expected_downloaded_size = getDownloadedSizeUnlocked(segment_lock);
if (expected_downloaded_size + size_to_reserve > range().size())
throw Exception(
ErrorCodes::REMOTE_FS_OBJECT_CACHE_ERROR,
"Attempt to reserve space too much space: {} ({})",
size_to_reserve, getInfoForLogImpl(segment_lock));
}
"Attempt to reserve space too much space ({}) for file segment with range: {} (downloaded size: {})",
size_to_reserve, range().toString(), downloaded_size);
assert(reserved_size >= current_downloaded_size);
chassert(reserved_size >= expected_downloaded_size);
}
/**
@ -370,9 +415,7 @@ bool FileSegment::reserve(size_t size_to_reserve)
* and the caller is going to continue;
*/
size_t current_downloaded_size = getDownloadedSize();
assert(reserved_size >= current_downloaded_size);
size_t already_reserved_size = reserved_size - current_downloaded_size;
size_t already_reserved_size = reserved_size - expected_downloaded_size;
bool reserved = already_reserved_size >= size_to_reserve;
if (!reserved)
@ -392,23 +435,13 @@ bool FileSegment::reserve(size_t size_to_reserve)
return reserved;
}
bool FileSegment::isDownloaded() const
{
std::lock_guard segment_lock(mutex);
return isDownloadedUnlocked(segment_lock);
}
bool FileSegment::isDownloadedUnlocked(std::lock_guard<std::mutex> & /* segment_lock */) const
{
return is_downloaded;
}
void FileSegment::setDownloaded([[maybe_unused]] std::lock_guard<std::mutex> & segment_lock)
void FileSegment::setDownloadedUnlocked([[maybe_unused]] std::unique_lock<std::mutex> & segment_lock)
{
if (is_downloaded)
return;
downloader_id.clear();
setDownloadState(State::DOWNLOADED);
is_downloaded = true;
if (cache_writer)
{
@ -424,10 +457,12 @@ void FileSegment::setDownloaded([[maybe_unused]] std::lock_guard<std::mutex> & s
assert(std::filesystem::file_size(getPathInLocalCache()) > 0);
}
void FileSegment::setDownloadFailed(std::lock_guard<std::mutex> & /* segment_lock */)
void FileSegment::setDownloadFailedUnlocked(std::unique_lock<std::mutex> & segment_lock)
{
download_state = State::PARTIALLY_DOWNLOADED_NO_CONTINUATION;
downloader_id.clear();
LOG_INFO(log, "Settings download as failed: {}", getInfoForLogUnlocked(segment_lock));
setDownloadState(State::PARTIALLY_DOWNLOADED_NO_CONTINUATION);
resetDownloaderUnlocked(segment_lock);
if (cache_writer)
{
@ -437,43 +472,31 @@ void FileSegment::setDownloadFailed(std::lock_guard<std::mutex> & /* segment_loc
}
}
void FileSegment::completeBatchAndResetDownloader()
void FileSegment::completePartAndResetDownloader()
{
std::lock_guard segment_lock(mutex);
std::unique_lock segment_lock(mutex);
completePartAndResetDownloaderUnlocked(segment_lock);
}
assertNotDetached(segment_lock);
void FileSegment::completePartAndResetDownloaderUnlocked(std::unique_lock<std::mutex> & segment_lock)
{
assertNotDetachedUnlocked(segment_lock);
assertIsDownloaderUnlocked("completePartAndResetDownloader", segment_lock);
if (!isDownloaderImpl(segment_lock))
{
cv.notify_all();
throw Exception(
ErrorCodes::REMOTE_FS_OBJECT_CACHE_ERROR,
"File segment can be completed only by downloader ({} != {})",
downloader_id, getCallerId());
}
resetDownloaderImpl(segment_lock);
LOG_TEST(log, "Complete batch. Current downloaded size: {}", getDownloadedSizeUnlocked(segment_lock));
resetDownloadingStateUnlocked(segment_lock);
resetDownloaderUnlocked(segment_lock);
LOG_TEST(log, "Complete batch. ({})", getInfoForLogUnlocked(segment_lock));
cv.notify_all();
}
void FileSegment::completeWithState(State state)
{
std::lock_guard cache_lock(cache->mutex);
std::lock_guard segment_lock(mutex);
std::unique_lock segment_lock(mutex);
assertNotDetached(segment_lock);
auto caller_id = getCallerId();
if (caller_id != downloader_id)
{
throw Exception(
ErrorCodes::LOGICAL_ERROR,
"File segment completion can be done only by downloader. (CallerId: {}, downloader id: {}",
caller_id, downloader_id);
}
assertNotDetachedUnlocked(segment_lock);
assertIsDownloaderUnlocked("complete", segment_lock);
if (state != State::DOWNLOADED
&& state != State::PARTIALLY_DOWNLOADED
@ -485,24 +508,29 @@ void FileSegment::completeWithState(State state)
"Cannot complete file segment with state: {}", stateToString(state));
}
download_state = state;
setDownloadState(state);
completeBasedOnCurrentState(cache_lock, segment_lock);
}
void FileSegment::completeWithoutState(std::lock_guard<std::mutex> & cache_lock)
void FileSegment::completeWithoutState()
{
std::lock_guard segment_lock(mutex);
std::lock_guard cache_lock(cache->mutex);
completeWithoutStateUnlocked(cache_lock);
}
void FileSegment::completeWithoutStateUnlocked(std::lock_guard<std::mutex> & cache_lock)
{
std::unique_lock segment_lock(mutex);
completeBasedOnCurrentState(cache_lock, segment_lock);
}
void FileSegment::completeBasedOnCurrentState(std::lock_guard<std::mutex> & cache_lock, std::lock_guard<std::mutex> & segment_lock)
void FileSegment::completeBasedOnCurrentState(std::lock_guard<std::mutex> & cache_lock, std::unique_lock<std::mutex> & segment_lock)
{
if (is_detached)
return;
bool is_downloader = isDownloaderImpl(segment_lock);
bool is_downloader = isDownloaderUnlocked(segment_lock);
bool is_last_holder = cache->isLastFileSegmentHolder(key(), offset(), cache_lock, segment_lock);
bool can_update_segment_state = is_downloader || is_last_holder;
size_t current_downloaded_size = getDownloadedSizeUnlocked(segment_lock);
SCOPE_EXIT({
@ -512,16 +540,16 @@ void FileSegment::completeBasedOnCurrentState(std::lock_guard<std::mutex> & cach
}
});
LOG_TEST(log, "Complete without state (is_last_holder: {}). File segment info: {}", is_last_holder, getInfoForLogImpl(segment_lock));
LOG_TEST(
log,
"Complete based on current state (is_last_holder: {}, {})",
is_last_holder, getInfoForLogUnlocked(segment_lock));
if (can_update_segment_state)
if (is_downloader)
{
if (current_downloaded_size == range().size())
setDownloaded(segment_lock);
else
download_state = State::PARTIALLY_DOWNLOADED;
resetDownloaderImpl(segment_lock);
if (download_state == State::DOWNLOADING) /// != in case of completeWithState
resetDownloadingStateUnlocked(segment_lock);
resetDownloaderUnlocked(segment_lock);
}
switch (download_state)
@ -535,16 +563,17 @@ void FileSegment::completeBasedOnCurrentState(std::lock_guard<std::mutex> & cach
}
case State::DOWNLOADED:
{
assert(getDownloadedSizeUnlocked(segment_lock) == range().size());
assert(isDownloadedUnlocked(segment_lock));
chassert(getDownloadedSizeUnlocked(segment_lock) == range().size());
assert(is_downloaded);
assert(!cache_writer);
break;
}
case State::DOWNLOADING:
case State::EMPTY:
{
assert(!is_last_holder);
chassert(!is_last_holder);
break;
}
case State::EMPTY:
case State::PARTIALLY_DOWNLOADED:
case State::PARTIALLY_DOWNLOADED_NO_CONTINUATION:
{
@ -554,7 +583,7 @@ void FileSegment::completeBasedOnCurrentState(std::lock_guard<std::mutex> & cach
{
LOG_TEST(log, "Remove cell {} (nothing downloaded)", range().toString());
download_state = State::SKIP_CACHE;
setDownloadState(State::SKIP_CACHE);
cache->remove(key(), offset(), cache_lock, segment_lock);
}
else
@ -567,7 +596,7 @@ void FileSegment::completeBasedOnCurrentState(std::lock_guard<std::mutex> & cach
* in FileSegmentsHolder represent a contiguous range, so we can resize
* it only when nobody needs it.
*/
download_state = State::PARTIALLY_DOWNLOADED_NO_CONTINUATION;
setDownloadState(State::PARTIALLY_DOWNLOADED_NO_CONTINUATION);
/// Resize this file segment by creating a copy file segment with DOWNLOADED state,
/// but current file segment should remain PARRTIALLY_DOWNLOADED_NO_CONTINUATION and with detached state,
@ -576,23 +605,22 @@ void FileSegment::completeBasedOnCurrentState(std::lock_guard<std::mutex> & cach
cache->reduceSizeToDownloaded(key(), offset(), cache_lock, segment_lock);
}
markAsDetached(segment_lock);
detachAssumeStateFinalized(segment_lock);
}
break;
}
}
LOG_TEST(log, "Completed file segment: {}", getInfoForLogImpl(segment_lock));
assertCorrectnessImpl(segment_lock);
LOG_TEST(log, "Completed file segment: {}", getInfoForLogUnlocked(segment_lock));
}
String FileSegment::getInfoForLog() const
{
std::lock_guard segment_lock(mutex);
return getInfoForLogImpl(segment_lock);
std::unique_lock segment_lock(mutex);
return getInfoForLogUnlocked(segment_lock);
}
String FileSegment::getInfoForLogImpl(std::lock_guard<std::mutex> & segment_lock) const
String FileSegment::getInfoForLogUnlocked(std::unique_lock<std::mutex> & segment_lock) const
{
WriteBufferFromOwnString info;
info << "File segment: " << range().toString() << ", ";
@ -601,15 +629,18 @@ String FileSegment::getInfoForLogImpl(std::lock_guard<std::mutex> & segment_lock
info << "downloaded size: " << getDownloadedSizeUnlocked(segment_lock) << ", ";
info << "reserved size: " << reserved_size << ", ";
info << "downloader id: " << (downloader_id.empty() ? "None" : downloader_id) << ", ";
info << "current write offset: " << getCurrentWriteOffsetUnlocked(segment_lock) << ", ";
info << "first non-downloaded offset: " << getFirstNonDownloadedOffsetUnlocked(segment_lock) << ", ";
info << "caller id: " << getCallerId() << ", ";
info << "detached: " << is_detached << ", ";
info << "persistent: " << is_persistent;
return info.str();
}
void FileSegment::wrapWithCacheInfo(Exception & e, const String & message, std::lock_guard<std::mutex> & segment_lock) const
void FileSegment::wrapWithCacheInfo(Exception & e, const String & message, std::unique_lock<std::mutex> & segment_lock) const
{
e.addMessage(fmt::format("{}, current cache state: {}", message, getInfoForLogImpl(segment_lock)));
e.addMessage(fmt::format("{}, current cache state: {}", message, getInfoForLogUnlocked(segment_lock)));
}
String FileSegment::stateToString(FileSegment::State state)
@ -634,63 +665,64 @@ String FileSegment::stateToString(FileSegment::State state)
void FileSegment::assertCorrectness() const
{
std::lock_guard segment_lock(mutex);
assertCorrectnessImpl(segment_lock);
std::unique_lock segment_lock(mutex);
assertCorrectnessUnlocked(segment_lock);
}
void FileSegment::assertCorrectnessImpl(std::lock_guard<std::mutex> & /* segment_lock */) const
void FileSegment::assertCorrectnessUnlocked(std::unique_lock<std::mutex> & segment_lock) const
{
assert(downloader_id.empty() == (download_state != FileSegment::State::DOWNLOADING));
assert(!downloader_id.empty() == (download_state == FileSegment::State::DOWNLOADING));
assert(download_state != FileSegment::State::DOWNLOADED || std::filesystem::file_size(getPathInLocalCache()) > 0);
auto current_downloader = getDownloaderUnlocked(segment_lock);
chassert(current_downloader.empty() == (download_state != FileSegment::State::DOWNLOADING));
chassert(!current_downloader.empty() == (download_state == FileSegment::State::DOWNLOADING));
chassert(download_state != FileSegment::State::DOWNLOADED || std::filesystem::file_size(getPathInLocalCache()) > 0);
}
void FileSegment::throwIfDetached() const
{
std::lock_guard segment_lock(mutex);
throwIfDetachedUnlocked(segment_lock);
}
void FileSegment::throwIfDetachedUnlocked(std::lock_guard<std::mutex> & segment_lock) const
void FileSegment::throwIfDetachedUnlocked(std::unique_lock<std::mutex> & segment_lock) const
{
throw Exception(
ErrorCodes::LOGICAL_ERROR,
"Cache file segment is in detached state, operation not allowed. "
"It can happen when cache was concurrently dropped with SYSTEM DROP FILESYSTEM CACHE FORCE. "
"Please, retry. File segment info: {}", getInfoForLogImpl(segment_lock));
"Please, retry. File segment info: {}", getInfoForLogUnlocked(segment_lock));
}
void FileSegment::assertNotDetached() const
{
std::unique_lock segment_lock(mutex);
assertNotDetachedUnlocked(segment_lock);
}
void FileSegment::assertNotDetached(std::lock_guard<std::mutex> & segment_lock) const
void FileSegment::assertNotDetachedUnlocked(std::unique_lock<std::mutex> & segment_lock) const
{
if (is_detached)
throwIfDetachedUnlocked(segment_lock);
}
void FileSegment::assertDetachedStatus(std::lock_guard<std::mutex> & segment_lock) const
void FileSegment::assertDetachedStatus(std::unique_lock<std::mutex> & segment_lock) const
{
/// Detached file segment is allowed to have only a certain subset of states.
/// It should be either EMPTY or one of the finalized states.
if (download_state != State::EMPTY && !hasFinalizedState())
if (download_state != State::EMPTY && !hasFinalizedStateUnlocked(segment_lock))
{
throw Exception(
ErrorCodes::LOGICAL_ERROR,
"Detached file segment has incorrect state: {}",
getInfoForLogImpl(segment_lock));
getInfoForLogUnlocked(segment_lock));
}
}
FileSegmentPtr FileSegment::getSnapshot(const FileSegmentPtr & file_segment, std::lock_guard<std::mutex> & /* cache_lock */)
{
std::lock_guard segment_lock(file_segment->mutex);
std::unique_lock segment_lock(file_segment->mutex);
auto snapshot = std::make_shared<FileSegment>(
file_segment->offset(),
file_segment->range().size(),
file_segment->key(),
nullptr,
State::EMPTY);
State::EMPTY,
CreateFileSegmentSettings{});
snapshot->hits_count = file_segment->getHitsCount();
snapshot->ref_count = file_segment.use_count();
@ -701,41 +733,43 @@ FileSegmentPtr FileSegment::getSnapshot(const FileSegmentPtr & file_segment, std
return snapshot;
}
bool FileSegment::hasFinalizedState() const
bool FileSegment::hasFinalizedStateUnlocked(std::unique_lock<std::mutex> & /* segment_lock */) const
{
return download_state == State::DOWNLOADED
|| download_state == State::PARTIALLY_DOWNLOADED_NO_CONTINUATION
|| download_state == State::SKIP_CACHE;
}
void FileSegment::detach(
std::lock_guard<std::mutex> & /* cache_lock */,
std::lock_guard<std::mutex> & segment_lock)
bool FileSegment::isDetached() const
{
std::unique_lock segment_lock(mutex);
return is_detached;
}
void FileSegment::detach(std::lock_guard<std::mutex> & /* cache_lock */, std::unique_lock<std::mutex> & segment_lock)
{
/// Now detached status can be in 2 cases, which do not do any complex logic:
/// 1. there is only 1 remaining file segment holder
/// && it does not need this segment anymore
/// && this file segment was in cache and needs to be removed
/// 2. in read_from_cache_if_exists_otherwise_bypass_cache case
if (is_detached)
return;
markAsDetached(segment_lock);
download_state = State::PARTIALLY_DOWNLOADED_NO_CONTINUATION;
downloader_id.clear();
if (download_state == State::DOWNLOADING)
resetDownloadingStateUnlocked(segment_lock);
else
setDownloadState(State::PARTIALLY_DOWNLOADED_NO_CONTINUATION);
LOG_DEBUG(log, "Detached file segment: {}", getInfoForLogImpl(segment_lock));
resetDownloaderUnlocked(segment_lock);
detachAssumeStateFinalized(segment_lock);
}
void FileSegment::markAsDetached(std::lock_guard<std::mutex> & /* segment_lock */)
void FileSegment::detachAssumeStateFinalized(std::unique_lock<std::mutex> & segment_lock)
{
is_detached = true;
CurrentMetrics::add(CurrentMetrics::CacheDetachedFileSegments);
LOG_TEST(log, "Detached file segment: {}", getInfoForLogUnlocked(segment_lock));
}
FileSegment::~FileSegment()
{
std::lock_guard segment_lock(mutex);
std::unique_lock segment_lock(mutex);
if (is_detached)
CurrentMetrics::sub(CurrentMetrics::CacheDetachedFileSegments);
}
@ -761,7 +795,7 @@ FileSegmentsHolder::~FileSegmentsHolder()
bool is_detached = false;
{
std::lock_guard segment_lock(file_segment->mutex);
std::unique_lock segment_lock(file_segment->mutex);
is_detached = file_segment->isDetached(segment_lock);
if (is_detached)
file_segment->assertDetachedStatus(segment_lock);
@ -779,7 +813,7 @@ FileSegmentsHolder::~FileSegmentsHolder()
/// under the same mutex, because complete() checks for segment pointers.
std::lock_guard cache_lock(cache->mutex);
file_segment->completeWithoutState(cache_lock);
file_segment->completeWithoutStateUnlocked(cache_lock);
file_segment_it = file_segments.erase(current_file_segment_it);
}
@ -822,10 +856,16 @@ FileSegments::iterator FileSegmentRangeWriter::allocateFileSegment(size_t offset
std::lock_guard cache_lock(cache->mutex);
CreateFileSegmentSettings create_settings
{
.is_persistent = is_persistent,
};
/// We set max_file_segment_size to be downloaded,
/// if we have less size to write, file segment will be resized in complete() method.
auto file_segment = cache->createFileSegmentForDownload(
key, offset, cache->max_file_segment_size, is_persistent, cache_lock);
key, offset, cache->max_file_segment_size, create_settings, cache_lock);
return file_segments_holder.add(std::move(file_segment));
}
@ -850,19 +890,18 @@ void FileSegmentRangeWriter::completeFileSegment(FileSegment & file_segment)
/// and therefore cannot be concurrently accessed. Nevertheless, it can be
/// accessed by cache system tables if someone read from them,
/// therefore we need a mutex.
std::lock_guard segment_lock(file_segment.mutex);
std::unique_lock segment_lock(file_segment.mutex);
assert(current_downloaded_size <= file_segment.range().size());
file_segment.segment_range = FileSegment::Range(
file_segment.segment_range.left,
file_segment.segment_range.left + current_downloaded_size - 1);
file_segment.reserved_size = current_downloaded_size;
file_segment.setDownloadedUnlocked(segment_lock);
}
{
std::lock_guard cache_lock(cache->mutex);
file_segment.completeWithoutState(cache_lock);
}
file_segment.completeWithoutState();
on_complete_file_segment_func(file_segment);
}
@ -893,18 +932,20 @@ bool FileSegmentRangeWriter::write(const char * data, size_t size, size_t offset
offset, current_file_segment_write_offset);
}
size_t current_write_offset = (*current_file_segment_it)->getCurrentWriteOffset();
auto current_file_segment = *current_file_segment_it;
if (current_file_segment->getRemainingSizeToDownload() == 0)
{
completeFileSegment(*current_file_segment);
current_file_segment_it = allocateFileSegment(current_file_segment_write_offset, is_persistent);
}
else if (current_file_segment->getDownloadOffset() != offset)
else if (current_write_offset != offset)
{
throw Exception(
ErrorCodes::LOGICAL_ERROR,
"Cannot file segment download offset {} does not match current write offset {}",
current_file_segment->getDownloadOffset(), offset);
current_write_offset, offset);
}
}
@ -915,7 +956,10 @@ bool FileSegmentRangeWriter::write(const char * data, size_t size, size_t offset
throw Exception(ErrorCodes::LOGICAL_ERROR, "Failed to set a downloader. ({})", file_segment->getInfoForLog());
SCOPE_EXIT({
file_segment->resetDownloader();
if (file_segment->isDownloader())
{
file_segment->completePartAndResetDownloader();
}
});
bool reserved = file_segment->reserve(size);
@ -932,7 +976,17 @@ bool FileSegmentRangeWriter::write(const char * data, size_t size, size_t offset
return false;
}
(*current_file_segment_it)->write(data, size, offset);
try
{
file_segment->write(data, size, offset);
}
catch (...)
{
file_segment->completePartAndResetDownloader();
throw;
}
file_segment->completePartAndResetDownloader();
current_file_segment_write_offset += size;
return true;

199
src/Interpreters/Cache/FileSegment.h
View File

@ -1,11 +1,15 @@
#pragma once
#include <Core/Types.h>
#include <boost/noncopyable.hpp>
#include <Interpreters/Cache/FileCacheKey.h>
#include <IO/WriteBufferFromFile.h>
#include <IO/ReadBufferFromFileBase.h>
#include <IO/WriteBufferFromString.h>
#include <IO/Operators.h>
#include <base/getThreadId.h>
#include <list>
#include <Interpreters/Cache/FileCacheKey.h>
#include <queue>
namespace Poco { class Logger; }
@ -26,17 +30,25 @@ using FileSegmentPtr = std::shared_ptr<FileSegment>;
using FileSegments = std::list<FileSegmentPtr>;
class FileSegment : boost::noncopyable
struct CreateFileSegmentSettings
{
bool is_persistent = false;
};
class FileSegment : private boost::noncopyable, public std::enable_shared_from_this<FileSegment>
{
friend class FileCache;
friend struct FileSegmentsHolder;
friend class FileSegmentRangeWriter;
friend class StorageSystemFilesystemCache;
public:
using Key = FileCacheKey;
using RemoteFileReaderPtr = std::shared_ptr<ReadBufferFromFileBase>;
using LocalCacheWriterPtr = std::unique_ptr<WriteBufferFromFile>;
using Downloader = std::string;
using DownloaderId = std::string;
enum class State
{
@ -78,7 +90,7 @@ public:
const Key & key_,
FileCache * cache_,
State download_state_,
bool is_persistent_ = false);
const CreateFileSegmentSettings & create_settings);
~FileSegment();
@ -101,6 +113,14 @@ public:
String toString() const { return fmt::format("[{}, {}]", std::to_string(left), std::to_string(right)); }
};
static String getCallerId();
String getInfoForLog() const;
/**
* ========== Methods to get file segment's constant state ==================
*/
const Range & range() const { return segment_range; }
const Key & key() const { return file_key; }
@ -109,11 +129,85 @@ public:
bool isPersistent() const { return is_persistent; }
using UniqueId = std::pair<FileCacheKey, size_t>;
UniqueId getUniqueId() const { return std::pair(key(), offset()); }
String getPathInLocalCache() const;
/**
* ========== Methods for _any_ file segment's owner ========================
*/
String getOrSetDownloader();
bool isDownloader() const;
DownloaderId getDownloader() const;
/// Wait for the change of state from DOWNLOADING to any other.
State wait();
bool reserve(size_t size);
bool isDownloaded() const;
void write(const char * from, size_t size, size_t offset_);
size_t getHitsCount() const { return hits_count; }
size_t getRefCount() const { return ref_count; }
void incrementHitsCount() { ++hits_count; }
size_t getCurrentWriteOffset() const;
size_t getFirstNonDownloadedOffset() const;
size_t getDownloadedSize() const;
/// Now detached status can be used in the following cases:
/// 1. there is only 1 remaining file segment holder
/// && it does not need this segment anymore
/// && this file segment was in cache and needs to be removed
/// 2. in read_from_cache_if_exists_otherwise_bypass_cache case to create NOOP file segments.
/// 3. removeIfExists - method which removes file segments from cache even though
/// it might be used at the moment.
/// If file segment is detached it means the following:
/// 1. It is not present in FileCache, e.g. will not be visible to any cache user apart from
/// those who acquired shared pointer to this file segment before it was detached.
/// 2. Detached file segment can still be hold by some cache users, but it's state became
/// immutable at the point it was detached, any non-const / stateful method will throw an
/// exception.
void detach(std::lock_guard<std::mutex> & cache_lock, std::unique_lock<std::mutex> & segment_lock);
static FileSegmentPtr getSnapshot(const FileSegmentPtr & file_segment, std::lock_guard<std::mutex> & cache_lock);
bool isDetached() const;
void assertCorrectness() const;
/**
* ========== Methods for _only_ file segment's `writer` ======================
*/
void synchronousWrite(const char * from, size_t size, size_t offset);
/**
* ========== Methods for _only_ file segment's `downloader` ==================
*/
/// Try to reserve exactly `size` bytes.
bool reserve(size_t size_to_reserve);
/// Write data into reserved space.
void write(const char * from, size_t size, size_t offset);
/// Complete file segment with a certain state.
void completeWithState(State state);
void completeWithoutState();
/// Complete file segment's part which was last written.
void completePartAndResetDownloader();
void resetDownloader();
RemoteFileReaderPtr getRemoteFileReader();
@ -123,91 +217,55 @@ public:
void resetRemoteFileReader();
String getOrSetDownloader();
String getDownloader() const;
void resetDownloader();
bool isDownloader() const;
bool isDownloaded() const;
static String getCallerId();
size_t getDownloadOffset() const;
size_t getDownloadedSize() const;
size_t getRemainingSizeToDownload() const;
void completeBatchAndResetDownloader();
void completeWithState(State state);
String getInfoForLog() const;
size_t getHitsCount() const { return hits_count; }
size_t getRefCount() const { return ref_count; }
void incrementHitsCount() { ++hits_count; }
void assertCorrectness() const;
static FileSegmentPtr getSnapshot(
const FileSegmentPtr & file_segment,
std::lock_guard<std::mutex> & cache_lock);
void detach(
std::lock_guard<std::mutex> & cache_lock,
std::lock_guard<std::mutex> & segment_lock);
[[noreturn]] void throwIfDetached() const;
bool isDetached() const;
String getPathInLocalCache() const;
private:
size_t availableSize() const { return reserved_size - downloaded_size; }
size_t getFirstNonDownloadedOffsetUnlocked(std::unique_lock<std::mutex> & segment_lock) const;
size_t getCurrentWriteOffsetUnlocked(std::unique_lock<std::mutex> & segment_lock) const;
size_t getDownloadedSizeUnlocked(std::unique_lock<std::mutex> & segment_lock) const;
size_t getDownloadedSizeUnlocked(std::lock_guard<std::mutex> & segment_lock) const;
String getInfoForLogImpl(std::lock_guard<std::mutex> & segment_lock) const;
void assertCorrectnessImpl(std::lock_guard<std::mutex> & segment_lock) const;
bool hasFinalizedState() const;
String getInfoForLogUnlocked(std::unique_lock<std::mutex> & segment_lock) const;
bool isDetached(std::lock_guard<std::mutex> & /* segment_lock */) const { return is_detached; }
void markAsDetached(std::lock_guard<std::mutex> & segment_lock);
[[noreturn]] void throwIfDetachedUnlocked(std::lock_guard<std::mutex> & segment_lock) const;
String getDownloaderUnlocked(std::unique_lock<std::mutex> & segment_lock) const;
void resetDownloaderUnlocked(std::unique_lock<std::mutex> & segment_lock);
void resetDownloadingStateUnlocked(std::unique_lock<std::mutex> & segment_lock);
void assertDetachedStatus(std::lock_guard<std::mutex> & segment_lock) const;
void assertNotDetached(std::lock_guard<std::mutex> & segment_lock) const;
void setDownloadState(State state);
void setDownloaded(std::lock_guard<std::mutex> & segment_lock);
void setDownloadFailed(std::lock_guard<std::mutex> & segment_lock);
bool isDownloaderImpl(std::lock_guard<std::mutex> & segment_lock) const;
void setDownloadedUnlocked(std::unique_lock<std::mutex> & segment_lock);
void setDownloadFailedUnlocked(std::unique_lock<std::mutex> & segment_lock);
bool isDownloadedUnlocked(std::lock_guard<std::mutex> & segment_lock) const;
bool hasFinalizedStateUnlocked(std::unique_lock<std::mutex> & segment_lock) const;
void wrapWithCacheInfo(Exception & e, const String & message, std::lock_guard<std::mutex> & segment_lock) const;
bool isDownloaderUnlocked(std::unique_lock<std::mutex> & segment_lock) const;
bool lastFileSegmentHolder() const;
bool isDetached(std::unique_lock<std::mutex> & /* segment_lock */) const { return is_detached; }
void detachAssumeStateFinalized(std::unique_lock<std::mutex> & segment_lock);
[[noreturn]] void throwIfDetachedUnlocked(std::unique_lock<std::mutex> & segment_lock) const;
void assertDetachedStatus(std::unique_lock<std::mutex> & segment_lock) const;
void assertNotDetached() const;
void assertNotDetachedUnlocked(std::unique_lock<std::mutex> & segment_lock) const;
void assertIsDownloaderUnlocked(const std::string & operation, std::unique_lock<std::mutex> & segment_lock) const;
void assertCorrectnessUnlocked(std::unique_lock<std::mutex> & segment_lock) const;
/// complete() without any completion state is called from destructor of
/// FileSegmentsHolder. complete() might check if the caller of the method
/// is the last alive holder of the segment. Therefore, complete() and destruction
/// of the file segment pointer must be done under the same cache mutex.
void completeBasedOnCurrentState(std::lock_guard<std::mutex> & cache_lock, std::lock_guard<std::mutex> & segment_lock);
void completeWithoutState(std::lock_guard<std::mutex> & cache_lock);
void completeWithoutStateUnlocked(std::lock_guard<std::mutex> & cache_lock);
void completeBasedOnCurrentState(std::lock_guard<std::mutex> & cache_lock, std::unique_lock<std::mutex> & segment_lock);
void resetDownloaderImpl(std::lock_guard<std::mutex> & segment_lock);
void completePartAndResetDownloaderUnlocked(std::unique_lock<std::mutex> & segment_lock);
void wrapWithCacheInfo(Exception & e, const String & message, std::unique_lock<std::mutex> & segment_lock) const;
Range segment_range;
State download_state;
String downloader_id;
/// The one who prepares the download
DownloaderId downloader_id;
RemoteFileReaderPtr remote_file_reader;
LocalCacheWriterPtr cache_writer;
@ -245,6 +303,7 @@ private:
std::atomic<size_t> ref_count = 0; /// Used for getting snapshot state
bool is_persistent;
CurrentMetrics::Increment metric_increment{CurrentMetrics::CacheFileSegments};
};

28
src/Interpreters/Context.cpp
View File

@ -143,7 +143,7 @@ namespace ErrorCodes
/** Set of known objects (environment), that could be used in query.
* Shared (global) part. Order of members (especially, order of destruction) is very important.
*/
struct ContextSharedPart
struct ContextSharedPart : boost::noncopyable
{
Poco::Logger * log = &Poco::Logger::get("Context");
@ -215,6 +215,7 @@ struct ContextSharedPart
std::unique_ptr<AccessControl> access_control;
mutable UncompressedCachePtr uncompressed_cache; /// The cache of decompressed blocks.
mutable MarkCachePtr mark_cache; /// Cache of marks in compressed files.
mutable std::unique_ptr<ThreadPool> load_marks_threadpool; /// Threadpool for loading marks cache.
mutable UncompressedCachePtr index_uncompressed_cache; /// The cache of decompressed blocks for MergeTree indices.
mutable MarkCachePtr index_mark_cache; /// Cache of marks in compressed files of MergeTree indices.
mutable MMappedFileCachePtr mmap_cache; /// Cache of mmapped files to avoid frequent open/map/unmap/close and to reuse from several threads.
@ -313,11 +314,19 @@ struct ContextSharedPart
~ContextSharedPart()
{
/// Wait for thread pool for background writes,
/// since it may use per-user MemoryTracker which will be destroyed here.
try
{
/// Wait for thread pool for background writes,
/// since it may use per-user MemoryTracker which will be destroyed here.
IObjectStorage::getThreadPoolWriter().wait();
/// Make sure that threadpool is destructed before this->process_list
/// because thread_status, which was created for threads inside threadpool,
/// relies on it.
if (load_marks_threadpool)
{
load_marks_threadpool->wait();
load_marks_threadpool.reset();
}
}
catch (...)
{
@ -1688,6 +1697,17 @@ void Context::dropMarkCache() const
shared->mark_cache->reset();
}
ThreadPool & Context::getLoadMarksThreadpool() const
{
auto lock = getLock();
if (!shared->load_marks_threadpool)
{
constexpr size_t pool_size = 50;
constexpr size_t queue_size = 1000000;
shared->load_marks_threadpool = std::make_unique<ThreadPool>(pool_size, pool_size, queue_size);
}
return *shared->load_marks_threadpool;
}
void Context::setIndexUncompressedCache(size_t max_size_in_bytes)
{
@ -3429,6 +3449,8 @@ ReadSettings Context::getReadSettings() const
res.local_fs_prefetch = settings.local_filesystem_read_prefetch;
res.remote_fs_prefetch = settings.remote_filesystem_read_prefetch;
res.load_marks_asynchronously = settings.load_marks_asynchronously;
res.remote_fs_read_max_backoff_ms = settings.remote_fs_read_max_backoff_ms;
res.remote_fs_read_backoff_max_tries = settings.remote_fs_read_backoff_max_tries;
res.enable_filesystem_cache = settings.enable_filesystem_cache;

1
src/Interpreters/Context.h
View File

@ -806,6 +806,7 @@ public:
void setMarkCache(size_t cache_size_in_bytes, const String & mark_cache_policy);
std::shared_ptr<MarkCache> getMarkCache() const;
void dropMarkCache() const;
ThreadPool & getLoadMarksThreadpool() const;
/// Create a cache of index uncompressed blocks of specified size. This can be done only once.
void setIndexUncompressedCache(size_t max_size_in_bytes);

2
src/Interpreters/FilesystemCacheLog.cpp
View File

@ -21,7 +21,7 @@ static String typeToString(FilesystemCacheLogElement::CacheType type)
case FilesystemCacheLogElement::CacheType::READ_FROM_FS_BYPASSING_CACHE:
return "READ_FROM_FS_BYPASSING_CACHE";
case FilesystemCacheLogElement::CacheType::WRITE_THROUGH_CACHE:
return "READ_FROM_FS_BYPASSING_CACHE";
return "WRITE_THROUGH_CACHE";
}
__builtin_unreachable();
}

57
src/Interpreters/tests/gtest_lru_file_cache.cpp
View File

@ -3,9 +3,9 @@
#include <gtest/gtest.h>
#include <Interpreters/Cache/FileCache.h>
#include <Interpreters/Cache/FileSegment.h>
#include <Interpreters/Cache/FileCacheSettings.h>
#include <Common/CurrentThread.h>
#include <Common/filesystemHelpers.h>
#include <Interpreters/Cache/FileCacheSettings.h>
#include <Common/tests/gtest_global_context.h>
#include <Common/SipHash.h>
#include <Common/hex.h>
@ -64,7 +64,7 @@ void download(DB::FileSegmentPtr file_segment)
fs::create_directories(subdir);
std::string data(size, '0');
file_segment->write(data.data(), size, file_segment->getDownloadOffset());
file_segment->write(data.data(), size, file_segment->getCurrentWriteOffset());
}
void prepareAndDownload(DB::FileSegmentPtr file_segment)
@ -89,6 +89,7 @@ TEST(FileCache, get)
{
if (fs::exists(cache_base_path))
fs::remove_all(cache_base_path);
fs::create_directories(cache_base_path);
DB::ThreadStatus thread_status;
@ -109,7 +110,7 @@ TEST(FileCache, get)
auto key = cache.hash("key1");
{
auto holder = cache.getOrSet(key, 0, 10, false); /// Add range [0, 9]
auto holder = cache.getOrSet(key, 0, 10, {}); /// Add range [0, 9]
auto segments = fromHolder(holder);
/// Range was not present in cache. It should be added in cache as one while file segment.
ASSERT_EQ(segments.size(), 1);
@ -138,7 +139,7 @@ TEST(FileCache, get)
{
/// Want range [5, 14], but [0, 9] already in cache, so only [10, 14] will be put in cache.
auto holder = cache.getOrSet(key, 5, 10, false);
auto holder = cache.getOrSet(key, 5, 10, {});
auto segments = fromHolder(holder);
ASSERT_EQ(segments.size(), 2);
@ -158,14 +159,14 @@ TEST(FileCache, get)
ASSERT_EQ(cache.getUsedCacheSize(), 15);
{
auto holder = cache.getOrSet(key, 9, 1, false); /// Get [9, 9]
auto holder = cache.getOrSet(key, 9, 1, {}); /// Get [9, 9]
auto segments = fromHolder(holder);
ASSERT_EQ(segments.size(), 1);
assertRange(7, segments[0], DB::FileSegment::Range(0, 9), DB::FileSegment::State::DOWNLOADED);
}
{
auto holder = cache.getOrSet(key, 9, 2, false); /// Get [9, 10]
auto holder = cache.getOrSet(key, 9, 2, {}); /// Get [9, 10]
auto segments = fromHolder(holder);
ASSERT_EQ(segments.size(), 2);
assertRange(8, segments[0], DB::FileSegment::Range(0, 9), DB::FileSegment::State::DOWNLOADED);
@ -173,15 +174,15 @@ TEST(FileCache, get)
}
{
auto holder = cache.getOrSet(key, 10, 1, false); /// Get [10, 10]
auto holder = cache.getOrSet(key, 10, 1, {}); /// Get [10, 10]
auto segments = fromHolder(holder);
ASSERT_EQ(segments.size(), 1);
assertRange(10, segments[0], DB::FileSegment::Range(10, 14), DB::FileSegment::State::DOWNLOADED);
}
complete(cache.getOrSet(key, 17, 4, false)); /// Get [17, 20]
complete(cache.getOrSet(key, 24, 3, false)); /// Get [24, 26]
/// complete(cache.getOrSet(key, 27, 1, false)); /// Get [27, 27]
complete(cache.getOrSet(key, 17, 4, {})); /// Get [17, 20]
complete(cache.getOrSet(key, 24, 3, {})); /// Get [24, 26]
/// completeWithState(cache.getOrSet(key, 27, 1, false)); /// Get [27, 27]
/// Current cache: [__________][_____] [____] [___][]
/// ^ ^^ ^ ^ ^ ^ ^^^
@ -191,7 +192,7 @@ TEST(FileCache, get)
ASSERT_EQ(cache.getUsedCacheSize(), 22);
{
auto holder = cache.getOrSet(key, 0, 26, false); /// Get [0, 25]
auto holder = cache.getOrSet(key, 0, 26, {}); /// Get [0, 25]
auto segments = fromHolder(holder);
ASSERT_EQ(segments.size(), 6);
@ -225,14 +226,14 @@ TEST(FileCache, get)
/// as max elements size is reached, next attempt to put something in cache should fail.
/// This will also check that [27, 27] was indeed evicted.
auto holder1 = cache.getOrSet(key, 27, 1, false);
auto holder1 = cache.getOrSet(key, 27, 1, {});
auto segments_1 = fromHolder(holder1); /// Get [27, 27]
ASSERT_EQ(segments_1.size(), 1);
assertRange(17, segments_1[0], DB::FileSegment::Range(27, 27), DB::FileSegment::State::EMPTY);
}
{
auto holder = cache.getOrSet(key, 12, 10, false); /// Get [12, 21]
auto holder = cache.getOrSet(key, 12, 10, {}); /// Get [12, 21]
auto segments = fromHolder(holder);
ASSERT_EQ(segments.size(), 4);
@ -256,7 +257,7 @@ TEST(FileCache, get)
ASSERT_EQ(cache.getFileSegmentsNum(), 5);
{
auto holder = cache.getOrSet(key, 23, 5, false); /// Get [23, 28]
auto holder = cache.getOrSet(key, 23, 5, {}); /// Get [23, 28]
auto segments = fromHolder(holder);
ASSERT_EQ(segments.size(), 3);
@ -277,12 +278,12 @@ TEST(FileCache, get)
/// 17 21 2324 26 28
{
auto holder5 = cache.getOrSet(key, 2, 3,false); /// Get [2, 4]
auto holder5 = cache.getOrSet(key, 2, 3, {}); /// Get [2, 4]
auto s5 = fromHolder(holder5);
ASSERT_EQ(s5.size(), 1);
assertRange(25, s5[0], DB::FileSegment::Range(2, 4), DB::FileSegment::State::EMPTY);
auto holder1 = cache.getOrSet(key, 30, 2, false); /// Get [30, 31]
auto holder1 = cache.getOrSet(key, 30, 2, {}); /// Get [30, 31]
auto s1 = fromHolder(holder1);
ASSERT_EQ(s1.size(), 1);
assertRange(26, s1[0], DB::FileSegment::Range(30, 31), DB::FileSegment::State::EMPTY);
@ -298,20 +299,20 @@ TEST(FileCache, get)
/// ^ ^ ^ ^ ^ ^ ^ ^
/// 2 4 23 24 26 27 30 31
auto holder2 = cache.getOrSet(key, 23, 1, false); /// Get [23, 23]
auto holder2 = cache.getOrSet(key, 23, 1, {}); /// Get [23, 23]
auto s2 = fromHolder(holder2);
ASSERT_EQ(s2.size(), 1);
auto holder3 = cache.getOrSet(key, 24, 3, false); /// Get [24, 26]
auto holder3 = cache.getOrSet(key, 24, 3, {}); /// Get [24, 26]
auto s3 = fromHolder(holder3);
ASSERT_EQ(s3.size(), 1);
auto holder4 = cache.getOrSet(key, 27, 1, false); /// Get [27, 27]
auto holder4 = cache.getOrSet(key, 27, 1, {}); /// Get [27, 27]
auto s4 = fromHolder(holder4);
ASSERT_EQ(s4.size(), 1);
/// All cache is now unreleasable because pointers are still hold
auto holder6 = cache.getOrSet(key, 0, 40, false);
auto holder6 = cache.getOrSet(key, 0, 40, {});
auto f = fromHolder(holder6);
ASSERT_EQ(f.size(), 9);
@ -332,7 +333,7 @@ TEST(FileCache, get)
}
{
auto holder = cache.getOrSet(key, 2, 3, false); /// Get [2, 4]
auto holder = cache.getOrSet(key, 2, 3, {}); /// Get [2, 4]
auto segments = fromHolder(holder);
ASSERT_EQ(segments.size(), 1);
assertRange(31, segments[0], DB::FileSegment::Range(2, 4), DB::FileSegment::State::DOWNLOADED);
@ -343,7 +344,7 @@ TEST(FileCache, get)
/// 2 4 23 24 26 27 30 31
{
auto holder = cache.getOrSet(key, 25, 5, false); /// Get [25, 29]
auto holder = cache.getOrSet(key, 25, 5, {}); /// Get [25, 29]
auto segments = fromHolder(holder);
ASSERT_EQ(segments.size(), 3);
@ -367,7 +368,7 @@ TEST(FileCache, get)
DB::CurrentThread::QueryScope query_scope_holder_1(query_context_1);
thread_status_1.attachQueryContext(query_context_1);
auto holder_2 = cache.getOrSet(key, 25, 5, false); /// Get [25, 29] once again.
auto holder_2 = cache.getOrSet(key, 25, 5, {}); /// Get [25, 29] once again.
auto segments_2 = fromHolder(holder_2);
ASSERT_EQ(segments.size(), 3);
@ -406,11 +407,11 @@ TEST(FileCache, get)
{
/// Now let's check the similar case but getting ERROR state after segment->wait(), when
/// state is changed not manually via segment->complete(state) but from destructor of holder
/// state is changed not manually via segment->completeWithState(state) but from destructor of holder
/// and notify_all() is also called from destructor of holder.
std::optional<DB::FileSegmentsHolder> holder;
holder.emplace(cache.getOrSet(key, 3, 23, false)); /// Get [3, 25]
holder.emplace(cache.getOrSet(key, 3, 23, {})); /// Get [3, 25]
auto segments = fromHolder(*holder);
ASSERT_EQ(segments.size(), 3);
@ -436,7 +437,7 @@ TEST(FileCache, get)
DB::CurrentThread::QueryScope query_scope_holder_1(query_context_1);
thread_status_1.attachQueryContext(query_context_1);
auto holder_2 = cache.getOrSet(key, 3, 23, false); /// Get [3, 25] once again
auto holder_2 = cache.getOrSet(key, 3, 23, {}); /// Get [3, 25] once again
auto segments_2 = fromHolder(*holder);
ASSERT_EQ(segments_2.size(), 3);
@ -485,7 +486,7 @@ TEST(FileCache, get)
cache2.initialize();
auto key = cache2.hash("key1");
auto holder1 = cache2.getOrSet(key, 2, 28, false); /// Get [2, 29]
auto holder1 = cache2.getOrSet(key, 2, 28, {}); /// Get [2, 29]
auto segments1 = fromHolder(holder1);
ASSERT_EQ(segments1.size(), 5);
@ -506,7 +507,7 @@ TEST(FileCache, get)
cache2.initialize();
auto key = cache2.hash("key1");
auto holder1 = cache2.getOrSet(key, 0, 25, false); /// Get [0, 24]
auto holder1 = cache2.getOrSet(key, 0, 25, {}); /// Get [0, 24]
auto segments1 = fromHolder(holder1);
ASSERT_EQ(segments1.size(), 3);

13
src/Storages/MergeTree/MergeTreeDataPartCompact.cpp
View File

@ -2,6 +2,7 @@
#include <DataTypes/NestedUtils.h>
#include <Storages/MergeTree/MergeTreeReaderCompact.h>
#include <Storages/MergeTree/MergeTreeDataPartWriterCompact.h>
#include <Interpreters/Context.h>
#include <Storages/MergeTree/LoadedMergeTreeDataPartInfoForReader.h>
@ -47,9 +48,11 @@ IMergeTreeDataPart::MergeTreeReaderPtr MergeTreeDataPartCompact::getReader(
const ReadBufferFromFileBase::ProfileCallback & profile_callback) const
{
auto read_info = std::make_shared<LoadedMergeTreeDataPartInfoForReader>(shared_from_this());
auto * load_marks_threadpool = reader_settings.read_settings.load_marks_asynchronously ? &read_info->getContext()->getLoadMarksThreadpool() : nullptr;
return std::make_unique<MergeTreeReaderCompact>(
read_info, columns_to_read, metadata_snapshot, uncompressed_cache,
mark_cache, mark_ranges, reader_settings,
mark_cache, mark_ranges, reader_settings, load_marks_threadpool,
avg_value_size_hints, profile_callback);
}
@ -93,7 +96,7 @@ void MergeTreeDataPartCompact::calculateEachColumnSizes(ColumnSizeByName & /*eac
void MergeTreeDataPartCompact::loadIndexGranularityImpl(
MergeTreeIndexGranularity & index_granularity_, const MergeTreeIndexGranularityInfo & index_granularity_info_,
const NamesAndTypesList & columns_, const DataPartStoragePtr & data_part_storage_)
size_t columns_count, const DataPartStoragePtr & data_part_storage_)
{
if (!index_granularity_info_.is_adaptive)
throw Exception("MergeTreeDataPartCompact cannot be created with non-adaptive granulary.", ErrorCodes::NOT_IMPLEMENTED);
@ -111,13 +114,13 @@ void MergeTreeDataPartCompact::loadIndexGranularityImpl(
while (!buffer->eof())
{
/// Skip offsets for columns
buffer->seek(columns_.size() * sizeof(MarkInCompressedFile), SEEK_CUR);
buffer->seek(columns_count * sizeof(MarkInCompressedFile), SEEK_CUR);
size_t granularity;
readIntBinary(granularity, *buffer);
index_granularity_.appendMark(granularity);
}
if (index_granularity_.getMarksCount() * index_granularity_info_.getMarkSizeInBytes(columns_.size()) != marks_file_size)
if (index_granularity_.getMarksCount() * index_granularity_info_.getMarkSizeInBytes(columns_count) != marks_file_size)
throw Exception("Cannot read all marks from file " + marks_file_path, ErrorCodes::CANNOT_READ_ALL_DATA);
index_granularity_.setInitialized();
@ -128,7 +131,7 @@ void MergeTreeDataPartCompact::loadIndexGranularity()
if (columns.empty())
throw Exception("No columns in part " + name, ErrorCodes::NO_FILE_IN_DATA_PART);
loadIndexGranularityImpl(index_granularity, index_granularity_info, columns, data_part_storage);
loadIndexGranularityImpl(index_granularity, index_granularity_info, columns.size(), data_part_storage);
}
bool MergeTreeDataPartCompact::hasColumnFiles(const NameAndTypePair & column) const

2
src/Storages/MergeTree/MergeTreeDataPartCompact.h
View File

@ -68,7 +68,7 @@ public:
protected:
static void loadIndexGranularityImpl(
MergeTreeIndexGranularity & index_granularity_, const MergeTreeIndexGranularityInfo & index_granularity_info_,
const NamesAndTypesList & columns_, const DataPartStoragePtr & data_part_storage_);
size_t columns_count, const DataPartStoragePtr & data_part_storage_);
private:
void checkConsistency(bool require_part_metadata) const override;

6
src/Storages/MergeTree/MergeTreeIndexReader.cpp
View File

@ -1,4 +1,5 @@
#include <Storages/MergeTree/MergeTreeIndexReader.h>
#include <Interpreters/Context.h>
namespace
{
@ -15,6 +16,9 @@ std::unique_ptr<MergeTreeReaderStream> makeIndexReader(
UncompressedCache * uncompressed_cache,
MergeTreeReaderSettings settings)
{
auto context = part->storage.getContext();
auto * load_marks_threadpool = settings.read_settings.load_marks_asynchronously ? &context->getLoadMarksThreadpool() : nullptr;
return std::make_unique<MergeTreeReaderStream>(
part->data_part_storage,
index->getFileName(), extension, marks_count,
@ -22,7 +26,7 @@ std::unique_ptr<MergeTreeReaderStream> makeIndexReader(
std::move(settings), mark_cache, uncompressed_cache,
part->getFileSizeOrZero(index->getFileName() + extension),
&part->index_granularity_info,
ReadBufferFromFileBase::ProfileCallback{}, CLOCK_MONOTONIC_COARSE, false);
ReadBufferFromFileBase::ProfileCallback{}, CLOCK_MONOTONIC_COARSE, false, load_marks_threadpool);
}
}

92
src/Storages/MergeTree/MergeTreeMarksLoader.cpp
View File

@ -2,9 +2,19 @@
#include <Storages/MergeTree/MergeTreeData.h>
#include <Common/MemoryTrackerBlockerInThread.h>
#include <IO/ReadBufferFromFile.h>
#include <Common/setThreadName.h>
#include <Common/scope_guard_safe.h>
#include <Common/CurrentMetrics.h>
#include <Common/ThreadPool.h>
#include <utility>
namespace ProfileEvents
{
extern const Event WaitMarksLoadMicroseconds;
extern const Event BackgroundLoadingMarksTasks;
}
namespace DB
{
@ -23,6 +33,7 @@ MergeTreeMarksLoader::MergeTreeMarksLoader(
const MergeTreeIndexGranularityInfo & index_granularity_info_,
bool save_marks_in_cache_,
const ReadSettings & read_settings_,
ThreadPool * load_marks_threadpool_,
size_t columns_in_mark_)
: data_part_storage(std::move(data_part_storage_))
, mark_cache(mark_cache_)
@ -32,13 +43,41 @@ MergeTreeMarksLoader::MergeTreeMarksLoader(
, save_marks_in_cache(save_marks_in_cache_)
, columns_in_mark(columns_in_mark_)
, read_settings(read_settings_)
, load_marks_threadpool(load_marks_threadpool_)
{
if (load_marks_threadpool)
{
future = loadMarksAsync();
}
}
MergeTreeMarksLoader::~MergeTreeMarksLoader()
{
if (future.valid())
{
future.wait();
}
}
const MarkInCompressedFile & MergeTreeMarksLoader::getMark(size_t row_index, size_t column_index)
{
if (!marks)
loadMarks();
{
Stopwatch watch(CLOCK_MONOTONIC);
if (future.valid())
{
marks = future.get();
future = {};
}
else
{
marks = loadMarks();
}
watch.stop();
ProfileEvents::increment(ProfileEvents::WaitMarksLoadMicroseconds, watch.elapsedMicroseconds());
}
#ifndef NDEBUG
if (column_index >= columns_in_mark)
@ -95,28 +134,63 @@ MarkCache::MappedPtr MergeTreeMarksLoader::loadMarksImpl()
return res;
}
void MergeTreeMarksLoader::loadMarks()
MarkCache::MappedPtr MergeTreeMarksLoader::loadMarks()
{
MarkCache::MappedPtr loaded_marks;
if (mark_cache)
{
auto key = mark_cache->hash(fs::path(data_part_storage->getFullPath()) / mrk_path);
if (save_marks_in_cache)
{
auto callback = [this]{ return loadMarksImpl(); };
marks = mark_cache->getOrSet(key, callback);
loaded_marks = mark_cache->getOrSet(key, callback);
}
else
{
marks = mark_cache->get(key);
if (!marks)
marks = loadMarksImpl();
loaded_marks = mark_cache->get(key);
if (!loaded_marks)
loaded_marks = loadMarksImpl();
}
}
else
marks = loadMarksImpl();
loaded_marks = loadMarksImpl();
if (!marks)
throw Exception(ErrorCodes::LOGICAL_ERROR, "Failed to load marks: {}", String(fs::path(data_part_storage->getFullPath()) / mrk_path));
if (!loaded_marks)
{
throw Exception(
ErrorCodes::LOGICAL_ERROR, "Failed to load marks: {}",
(fs::path(data_part_storage->getFullPath()) / mrk_path).string());
}
return loaded_marks;
}
std::future<MarkCache::MappedPtr> MergeTreeMarksLoader::loadMarksAsync()
{
ThreadGroupStatusPtr thread_group;
if (CurrentThread::isInitialized() && CurrentThread::get().getThreadGroup())
thread_group = CurrentThread::get().getThreadGroup();
auto task = std::make_shared<std::packaged_task<MarkCache::MappedPtr()>>([thread_group, this]
{
setThreadName("loadMarksThread");
if (thread_group)
CurrentThread::attachTo(thread_group);
SCOPE_EXIT_SAFE({
if (thread_group)
CurrentThread::detachQuery();
});
ProfileEvents::increment(ProfileEvents::BackgroundLoadingMarksTasks);
return loadMarks();
});
auto task_future = task->get_future();
load_marks_threadpool->scheduleOrThrow([task]{ (*task)(); });
return task_future;
}
}

11
src/Storages/MergeTree/MergeTreeMarksLoader.h
View File

@ -2,11 +2,13 @@
#include <Storages/MergeTree/IDataPartStorage.h>
#include <Storages/MarkCache.h>
#include <IO/ReadSettings.h>
#include <Common/ThreadPool.h>
namespace DB
{
struct MergeTreeIndexGranularityInfo;
class Threadpool;
class MergeTreeMarksLoader
{
@ -21,8 +23,11 @@ public:
const MergeTreeIndexGranularityInfo & index_granularity_info_,
bool save_marks_in_cache_,
const ReadSettings & read_settings_,
ThreadPool * load_marks_threadpool_,
size_t columns_in_mark_ = 1);
~MergeTreeMarksLoader();
const MarkInCompressedFile & getMark(size_t row_index, size_t column_index = 0);
private:
@ -36,8 +41,12 @@ private:
MarkCache::MappedPtr marks;
ReadSettings read_settings;
void loadMarks();
MarkCache::MappedPtr loadMarks();
std::future<MarkCache::MappedPtr> loadMarksAsync();
MarkCache::MappedPtr loadMarksImpl();
std::future<MarkCache::MappedPtr> future;
ThreadPool * load_marks_threadpool;
};
}

2
src/Storages/MergeTree/MergeTreeReaderCompact.cpp
View File

@ -22,6 +22,7 @@ MergeTreeReaderCompact::MergeTreeReaderCompact(
MarkCache * mark_cache_,
MarkRanges mark_ranges_,
MergeTreeReaderSettings settings_,
ThreadPool * load_marks_threadpool_,
ValueSizeMap avg_value_size_hints_,
const ReadBufferFromFileBase::ProfileCallback & profile_callback_,
clockid_t clock_type_)
@ -42,6 +43,7 @@ MergeTreeReaderCompact::MergeTreeReaderCompact(
data_part_info_for_read_->getIndexGranularityInfo(),
settings.save_marks_in_cache,
settings.read_settings,
load_marks_threadpool_,
data_part_info_for_read_->getColumns().size())
{
try

1
src/Storages/MergeTree/MergeTreeReaderCompact.h
View File

@ -26,6 +26,7 @@ public:
MarkCache * mark_cache_,
MarkRanges mark_ranges_,
MergeTreeReaderSettings settings_,
ThreadPool * load_marks_threadpool_,
ValueSizeMap avg_value_size_hints_ = {},
const ReadBufferFromFileBase::ProfileCallback & profile_callback_ = {},
clockid_t clock_type_ = CLOCK_MONOTONIC_COARSE);

16
src/Storages/MergeTree/MergeTreeReaderStream.cpp
View File

@ -16,14 +16,19 @@ namespace ErrorCodes
MergeTreeReaderStream::MergeTreeReaderStream(
DataPartStoragePtr data_part_storage_,
const String & path_prefix_, const String & data_file_extension_, size_t marks_count_,
const String & path_prefix_,
const String & data_file_extension_,
size_t marks_count_,
const MarkRanges & all_mark_ranges_,
const MergeTreeReaderSettings & settings_,
MarkCache * mark_cache_,
UncompressedCache * uncompressed_cache_, size_t file_size_,
UncompressedCache * uncompressed_cache_,
size_t file_size_,
const MergeTreeIndexGranularityInfo * index_granularity_info_,
const ReadBufferFromFileBase::ProfileCallback & profile_callback_, clockid_t clock_type_,
bool is_low_cardinality_dictionary_)
const ReadBufferFromFileBase::ProfileCallback & profile_callback_,
clockid_t clock_type_,
bool is_low_cardinality_dictionary_,
ThreadPool * load_marks_cache_threadpool_)
: settings(settings_)
, profile_callback(profile_callback_)
, clock_type(clock_type_)
@ -45,7 +50,8 @@ MergeTreeReaderStream::MergeTreeReaderStream(
marks_count,
*index_granularity_info,
save_marks_in_cache,
settings.read_settings)
settings.read_settings,
load_marks_cache_threadpool_)
{
}

16
src/Storages/MergeTree/MergeTreeReaderStream.h
View File

@ -20,13 +20,19 @@ class MergeTreeReaderStream
public:
MergeTreeReaderStream(
DataPartStoragePtr data_part_storage_,
const String & path_prefix_, const String & data_file_extension_, size_t marks_count_,
const String & path_prefix_,
const String & data_file_extension_,
size_t marks_count_,
const MarkRanges & all_mark_ranges,
const MergeTreeReaderSettings & settings_,
MarkCache * mark_cache, UncompressedCache * uncompressed_cache,
size_t file_size_, const MergeTreeIndexGranularityInfo * index_granularity_info_,
const ReadBufferFromFileBase::ProfileCallback & profile_callback, clockid_t clock_type,
bool is_low_cardinality_dictionary_);
MarkCache * mark_cache,
UncompressedCache * uncompressed_cache,
size_t file_size_,
const MergeTreeIndexGranularityInfo * index_granularity_info_,
const ReadBufferFromFileBase::ProfileCallback & profile_callback,
clockid_t clock_type,
bool is_low_cardinality_dictionary_,
ThreadPool * load_marks_cache_threadpool_);
void seekToMark(size_t index);

6
src/Storages/MergeTree/MergeTreeReaderWide.cpp
View File

@ -6,6 +6,7 @@
#include <DataTypes/NestedUtils.h>
#include <DataTypes/DataTypeNested.h>
#include <Interpreters/inplaceBlockConversions.h>
#include <Interpreters/Context.h>
#include <Storages/MergeTree/IMergeTreeReader.h>
#include <Storages/MergeTree/MergeTreeDataPartWide.h>
#include <Common/escapeForFileName.h>
@ -186,12 +187,15 @@ void MergeTreeReaderWide::addStreams(
has_any_stream = true;
bool is_lc_dict = substream_path.size() > 1 && substream_path[substream_path.size() - 2].type == ISerialization::Substream::Type::DictionaryKeys;
auto context = data_part_info_for_read->getContext();
auto * load_marks_threadpool = settings.read_settings.load_marks_asynchronously ? &context->getLoadMarksThreadpool() : nullptr;
streams.emplace(stream_name, std::make_unique<MergeTreeReaderStream>(
data_part_info_for_read->getDataPartStorage(), stream_name, DATA_FILE_EXTENSION,
data_part_info_for_read->getMarksCount(), all_mark_ranges, settings, mark_cache,
uncompressed_cache, data_part_info_for_read->getFileSizeOrZero(stream_name + DATA_FILE_EXTENSION),
&data_part_info_for_read->getIndexGranularityInfo(),
profile_callback, clock_type, is_lc_dict));
profile_callback, clock_type, is_lc_dict, load_marks_threadpool));
};
serialization->enumerateStreams(callback);

3
src/Storages/RocksDB/StorageEmbeddedRocksDB.cpp
View File

@ -523,8 +523,7 @@ Chunk StorageEmbeddedRocksDB::getByKeys(
Block StorageEmbeddedRocksDB::getSampleBlock(const Names &) const
{
auto metadata = getInMemoryMetadataPtr();
return metadata ? metadata->getSampleBlock() : Block();
return getInMemoryMetadataPtr()->getSampleBlock();
}
Chunk StorageEmbeddedRocksDB::getBySerializedKeys(

1
tests/config/install.sh
View File

@ -61,6 +61,7 @@ ln -sf $SRC_PATH/users.d/memory_profiler.xml $DEST_SERVER_PATH/users.d/
ln -sf $SRC_PATH/users.d/no_fsync_metadata.xml $DEST_SERVER_PATH/users.d/
ln -sf $SRC_PATH/users.d/filelog.xml $DEST_SERVER_PATH/users.d/
ln -sf $SRC_PATH/users.d/enable_blobs_check.xml $DEST_SERVER_PATH/users.d/
ln -sf $SRC_PATH/users.d/marks.xml $DEST_SERVER_PATH/users.d/
# FIXME DataPartsExchange may hang for http_send_timeout seconds
# when nobody is going to read from the other side of socket (due to "Fetching of part was cancelled"),

7
tests/config/users.d/marks.xml Normal file
View File

@ -0,0 +1,7 @@
<clickhouse>
<profiles>
<default>
<load_marks_asynchronously>1</load_marks_asynchronously>
</default>
</profiles>
</clickhouse>

1
tests/queries/0_stateless/01283_max_threads_simple_query_optimization.sql
View File

@ -2,6 +2,7 @@ DROP TABLE IF EXISTS data_01283;
set remote_filesystem_read_method = 'read';
set local_filesystem_read_method = 'pread';
set load_marks_asynchronously = 0;
CREATE TABLE data_01283 engine=MergeTree()
ORDER BY key

1
tests/queries/0_stateless/01323_too_many_threads_bug.sql
View File

@ -2,6 +2,7 @@ drop table if exists table_01323_many_parts;
set remote_filesystem_read_method = 'read';
set local_filesystem_read_method = 'pread';
set load_marks_asynchronously = 0;
create table table_01323_many_parts (x UInt64) engine = MergeTree order by x partition by x % 100;
set max_partitions_per_insert_block = 100;

1
tests/queries/0_stateless/01524_do_not_merge_across_partitions_select_final.sql
View File

@ -33,6 +33,7 @@ OPTIMIZE TABLE select_final FINAL;
SET remote_filesystem_read_method = 'read';
SET local_filesystem_read_method = 'pread';
set load_marks_asynchronously = 0;
SELECT max(x) FROM select_final FINAL;

2
tests/queries/0_stateless/02263_lazy_mark_load.sh
View File

@ -30,7 +30,7 @@ EOF
${CLICKHOUSE_CLIENT} -q "SYSTEM STOP MERGES lazy_mark_test"
${CLICKHOUSE_CLIENT} -q "INSERT INTO lazy_mark_test select number, number % 3, number % 5, number % 10, number % 13, number % 15, number % 17, number % 18, number % 22, number % 25 from numbers(1000000)"
${CLICKHOUSE_CLIENT} -q "SYSTEM DROP MARK CACHE"
${CLICKHOUSE_CLIENT} --log_queries=1 --query_id "${QUERY_ID}" -q "SELECT * FROM lazy_mark_test WHERE n3==11"
${CLICKHOUSE_CLIENT} --log_queries=1 --query_id "${QUERY_ID}" -q "SELECT * FROM lazy_mark_test WHERE n3==11 SETTINGS load_marks_asynchronously=0"
${CLICKHOUSE_CLIENT} -q "SYSTEM FLUSH LOGS"
${CLICKHOUSE_CLIENT} -q "select ProfileEvents['FileOpen'] from system.query_log where query_id = '${QUERY_ID}' and type = 'QueryFinish' and current_database = currentDatabase()"

2
tests/queries/0_stateless/02417_load_marks_async.reference Normal file
View File

@ -0,0 +1,2 @@
Ok
Ok

51
tests/queries/0_stateless/02417_load_marks_async.sh Executable file
View File

@ -0,0 +1,51 @@
#!/usr/bin/env bash
CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
# shellcheck source=../shell_config.sh
. "$CURDIR"/../shell_config.sh
${CLICKHOUSE_CLIENT} -q "DROP TABLE IF EXISTS test;"
${CLICKHOUSE_CLIENT} -n -q "
CREATE TABLE test
(
n0 UInt64,
n1 UInt64,
n2 UInt64,
n3 UInt64,
n4 UInt64,
n5 UInt64,
n6 UInt64,
n7 UInt64,
n8 UInt64,
n9 UInt64
)
ENGINE = MergeTree
ORDER BY n0 SETTINGS min_bytes_for_wide_part = 1;"
${CLICKHOUSE_CLIENT} -q "INSERT INTO test select number, number % 3, number % 5, number % 10, number % 13, number % 15, number % 17, number % 18, number % 22, number % 25 from numbers(1000000)"
${CLICKHOUSE_CLIENT} -q "SYSTEM STOP MERGES test"
function test
{
QUERY_ID=$(${CLICKHOUSE_CLIENT} -q "select lower(hex(reverse(reinterpretAsString(generateUUIDv4()))))")
${CLICKHOUSE_CLIENT} -q "SYSTEM DROP MARK CACHE"
${CLICKHOUSE_CLIENT} --query_id "${QUERY_ID}" -q "SELECT * FROM test SETTINGS load_marks_asynchronously=$1 FORMAT Null"
${CLICKHOUSE_CLIENT} -q "SYSTEM FLUSH LOGS"
result=$(${CLICKHOUSE_CLIENT} -q "SELECT ProfileEvents['WaitMarksLoadMicroseconds'] FROM system.query_log WHERE query_id = '${QUERY_ID}' AND type = 'QueryFinish' AND current_database = currentDatabase()")
if [[ $result -ne 0 ]]; then
echo 'Ok'
else
echo 'F'
fi
result=$(${CLICKHOUSE_CLIENT} -q "SELECT ProfileEvents['BackgroundLoadingMarksTasks'] FROM system.query_log WHERE query_id = '${QUERY_ID}' AND type = 'QueryFinish' AND current_database = currentDatabase()")
if [[ $result -ne 0 ]]; then
echo 'Ok'
else
echo 'F'
fi
}
test 1