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fix

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This commit is contained in:
feng lv 2021-10-18 06:38:47 +00:00
parent 9378b93e41
commit 074e02eb14
10 changed files with 228 additions and 66 deletions
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26
src/Storages/FileLog/DirectoryWatcherBase.cpp
View File

@ -1,6 +1,8 @@
#include <Interpreters/Context.h>
#include <Storages/FileLog/DirectoryWatcherBase.h>
#include <Storages/FileLog/FileLogDirectoryWatcher.h>
#include <Storages/FileLog/StorageFileLog.h>
#include <base/sleep.h>
#include <filesystem>
#include <unistd.h>
@ -20,7 +22,11 @@ static constexpr int buffer_size = 4096;
DirectoryWatcherBase::DirectoryWatcherBase(
FileLogDirectoryWatcher & owner_, const std::string & path_, ContextPtr context_, int event_mask_)
: WithContext(context_), owner(owner_), path(path_), event_mask(event_mask_)
: WithContext(context_)
, owner(owner_)
, path(path_)
, event_mask(event_mask_)
, milliseconds_to_wait(owner.storage.getFileLogSettings()->poll_directory_watch_events_backoff_init.totalMilliseconds())
{
if (!std::filesystem::exists(path))
throw Exception(ErrorCodes::FILE_DOESNT_EXIST, "Path {} does not exist", path);
@ -64,8 +70,9 @@ void DirectoryWatcherBase::watchFunc()
while (!stopped)
{
const auto & settings = owner.storage.getFileLogSettings();
if (poll(&pfd, 1, 500) > 0 && pfd.revents & POLLIN)
if (poll(&pfd, 1, milliseconds_to_wait) > 0 && pfd.revents & POLLIN)
{
milliseconds_to_wait = settings->poll_directory_watch_events_backoff_init.totalMilliseconds();
int n = read(fd, buffer.data(), buffer.size());
int i = 0;
if (n > 0)
@ -109,33 +116,20 @@ void DirectoryWatcherBase::watchFunc()
}
/// Wake up reader thread
auto & mutex = owner.storage.getMutex();
auto & cv = owner.storage.getConditionVariable();
std::unique_lock<std::mutex> lock(mutex);
owner.storage.setNewEvents();
lock.unlock();
cv.notify_one();
owner.storage.wakeUp();
}
else
{
if (milliseconds_to_wait < static_cast<uint64_t>(settings->poll_directory_watch_events_backoff_max.totalMilliseconds()))
milliseconds_to_wait *= settings->poll_directory_watch_events_backoff_factor.value;
break;
}
}
if (!stopped)
watch_task->scheduleAfter(milliseconds_to_wait);
}
DirectoryWatcherBase::~DirectoryWatcherBase()
{
stop();
close(fd);
if (watch_task)
watch_task->deactivate();
}
void DirectoryWatcherBase::start()

3
src/Storages/FileLog/DirectoryWatcherBase.h
View File

@ -97,10 +97,11 @@ private:
std::atomic<bool> stopped{false};
uint64_t milliseconds_to_wait;
const std::string path;
int event_mask;
uint64_t milliseconds_to_wait;
int fd;
};

2
src/Storages/FileLog/FileLogDirectoryWatcher.cpp
View File

@ -78,9 +78,9 @@ void FileLogDirectoryWatcher::onItemModified(DirectoryWatcherBase::DirectoryEven
auto event_path = ev.path;
EventInfo info{ev.event, "onItemModified"};
/// Already have MODIFY event for this file
if (auto it = events.find(event_path); it != events.end())
{
/// Already have MODIFY event for this file
if (it->second.received_modification_event)
return;
else

2
src/Storages/FileLog/FileLogDirectoryWatcher.h
View File

@ -1,7 +1,6 @@
#pragma once
#include <Storages/FileLog/DirectoryWatcherBase.h>
#include <Storages/FileLog/StorageFileLog.h>
#include <base/logger_useful.h>
@ -10,6 +9,7 @@
namespace DB
{
class StorageFileLog;
class FileLogDirectoryWatcher
{

2
src/Storages/FileLog/ReadBufferFromFileLog.cpp
View File

@ -117,7 +117,7 @@ void ReadBufferFromFileLog::readNewRecords(ReadBufferFromFileLog::Records & new_
{
/// Need to get offset before reading record from stream
auto offset = reader.tellg();
if (static_cast<UInt64>(offset) < file_meta.last_open_end)
if (static_cast<UInt64>(offset) >= file_meta.last_open_end)
break;
record.offset = offset;
StorageFileLog::assertStreamGood(reader);

43
src/Storages/FileLog/StorageFileLog.cpp
View File

@ -47,8 +47,6 @@ namespace ErrorCodes
namespace
{
const auto RESCHEDULE_MS = 500;
const auto BACKOFF_TRESHOLD = 32000;
const auto MAX_THREAD_WORK_DURATION_MS = 60000;
}
@ -57,7 +55,6 @@ StorageFileLog::StorageFileLog(
ContextPtr context_,
const ColumnsDescription & columns_,
const String & path_,
const String & relative_data_path_,
const String & format_name_,
std::unique_ptr<FileLogSettings> settings,
const String & comment,
@ -66,10 +63,9 @@ StorageFileLog::StorageFileLog(
, WithContext(context_->getGlobalContext())
, filelog_settings(std::move(settings))
, path(path_)
, relative_data_path(relative_data_path_)
, format_name(format_name_)
, log(&Poco::Logger::get("StorageFileLog (" + table_id_.table_name + ")"))
, milliseconds_to_wait(RESCHEDULE_MS)
, milliseconds_to_wait(filelog_settings->poll_directory_watch_events_backoff_init.totalMilliseconds())
{
StorageInMemoryMetadata storage_metadata;
storage_metadata.setColumns(columns_);
@ -100,9 +96,9 @@ StorageFileLog::StorageFileLog(
void StorageFileLog::loadMetaFiles(bool attach)
{
const auto & storage_id = getStorageID();
root_meta_path = std::filesystem::path(getContext()->getPath()) / "metadata" / "filelog_storage_metadata" / storage_id.getDatabaseName()
/ storage_id.getTableName();
const auto & storage = getStorageID();
root_meta_path
= std::filesystem::path(getContext()->getPath()) / ".filelog_storage_metadata" / storage.getDatabaseName() / storage.getTableName();
/// Attach table
if (attach)
@ -110,8 +106,8 @@ void StorageFileLog::loadMetaFiles(bool attach)
/// Meta file may lost, log and create directory
if (!std::filesystem::exists(root_meta_path))
{
/// Create root_meta_path directory when store meta data
LOG_ERROR(log, "Metadata files of table {} are lost.", getStorageID().getTableName());
std::filesystem::create_directories(root_meta_path);
}
/// Load all meta info to file_infos;
deserialize();
@ -180,8 +176,8 @@ void StorageFileLog::loadFiles()
/// data file have been renamed, need update meta file's name
if (it->second.file_name != file)
{
it->second.file_name = file;
std::filesystem::rename(getFullMetaPath(it->second.file_name), getFullMetaPath(file));
it->second.file_name = file;
}
}
/// New file
@ -261,6 +257,8 @@ void StorageFileLog::serialize(UInt64 inode, const FileMeta & file_meta) const
void StorageFileLog::deserialize()
{
if (!std::filesystem::exists(root_meta_path))
return;
/// In case of single file (not a watched directory),
/// iterated directoy always has one file inside.
for (const auto & dir_entry : std::filesystem::directory_iterator{root_meta_path})
@ -324,7 +322,7 @@ Pipe StorageFileLog::read(
getStorageID().getTableName());
}
if (running_streams.load(std::memory_order_relaxed))
if (running_streams)
{
throw Exception("Another select query is running on this table, need to wait it finish.", ErrorCodes::CANNOT_SELECT);
}
@ -409,6 +407,9 @@ void StorageFileLog::shutdown()
{
task->stream_cancelled = true;
/// Reader thread may wait for wake up
wakeUp();
LOG_TRACE(log, "Waiting for cleanup");
task->holder->deactivate();
}
@ -627,6 +628,9 @@ void StorageFileLog::threadFunc()
/// Waiting for watch directory thread to wake up
cv.wait(lock, [this] { return has_new_events; });
has_new_events = false;
if (task->stream_cancelled)
return;
task->holder->schedule();
}
else
@ -636,7 +640,7 @@ void StorageFileLog::threadFunc()
bool StorageFileLog::streamToViews()
{
if (running_streams.load(std::memory_order_relaxed))
if (running_streams)
{
throw Exception("Another select query is running on this table, need to wait it finish.", ErrorCodes::CANNOT_SELECT);
}
@ -702,6 +706,14 @@ bool StorageFileLog::streamToViews()
return updateFileInfos();
}
void StorageFileLog::wakeUp()
{
std::unique_lock<std::mutex> lock(mutex);
has_new_events = true;
lock.unlock();
cv.notify_one();
}
void registerStorageFileLog(StorageFactory & factory)
{
auto creator_fn = [](const StorageFactory::Arguments & args)
@ -767,7 +779,6 @@ void registerStorageFileLog(StorageFactory & factory)
args.getContext(),
args.columns,
path,
args.relative_data_path,
format,
std::move(filelog_settings),
args.comment,
@ -813,10 +824,10 @@ bool StorageFileLog::updateFileInfos()
auto events = directory_watch->getEventsAndReset();
for (const auto & [file_name, event_info] : events)
for (const auto & [file_name, event_infos] : events)
{
String file_path = getFullDataPath(file_name);
for(const auto & event_info : event_info.file_events)
for (const auto & event_info : event_infos.file_events)
{
switch (event_info.type)
{
@ -836,7 +847,7 @@ bool StorageFileLog::updateFileInfos()
file_infos.meta_by_inode.emplace(inode, FileMeta{.file_name = file_name});
if (auto it = file_infos.context_by_name.find(file_name); it != file_infos.context_by_name.end())
it->second = FileContext{.inode = inode};
it->second = FileContext{.status = FileStatus::OPEN, .inode = inode};
else
file_infos.context_by_name.emplace(file_name, FileContext{.inode = inode});
}

33
src/Storages/FileLog/StorageFileLog.h
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@ -1,6 +1,7 @@
#pragma once
#include <Storages/FileLog/Buffer_fwd.h>
#include <Storages/FileLog/FileLogDirectoryWatcher.h>
#include <Storages/FileLog/FileLogSettings.h>
#include <Core/BackgroundSchedulePool.h>
@ -126,9 +127,7 @@ public:
void increaseStreams();
void reduceStreams();
auto & getConditionVariable() { return cv; }
auto & getMutex() { return mutex; }
void setNewEvents() { has_new_events = true; }
void wakeUp();
const auto & getFileLogSettings() const { return filelog_settings; }
@ -138,7 +137,6 @@ protected:
ContextPtr context_,
const ColumnsDescription & columns_,
const String & path_,
const String & relative_data_path_,
const String & format_name_,
std::unique_ptr<FileLogSettings> settings,
const String & comment,
@ -148,14 +146,11 @@ private:
std::unique_ptr<FileLogSettings> filelog_settings;
const String path;
/// For meta file
const String relative_data_path;
bool path_is_directory = true;
/// If path argument of the table is a regular file, it equals to user_files_path
/// otherwise, it equals to user_files_path/ + path_argument/, e.g. path
String root_data_path;
/// relative_data_path/ + table_name/
String root_meta_path;
FileInfos file_infos;
@ -163,20 +158,8 @@ private:
const String format_name;
Poco::Logger * log;
std::unique_ptr<FileLogDirectoryWatcher> directory_watch = nullptr;
uint64_t milliseconds_to_wait;
struct TaskContext
{
BackgroundSchedulePool::TaskHolder holder;
std::atomic<bool> stream_cancelled {false};
explicit TaskContext(BackgroundSchedulePool::TaskHolder&& task_) : holder(std::move(task_))
{
}
};
std::shared_ptr<TaskContext> task;
/// In order to avoid data race, using a naive trick to forbid execute two select
/// simultaneously, although read is not useful in this engine. Using an atomic
/// variable to records current unfinishing streams, then if have unfinishing streams,
@ -189,6 +172,18 @@ private:
bool has_new_events = false;
std::condition_variable cv;
struct TaskContext
{
BackgroundSchedulePool::TaskHolder holder;
std::atomic<bool> stream_cancelled {false};
explicit TaskContext(BackgroundSchedulePool::TaskHolder&& task_) : holder(std::move(task_))
{
}
};
std::shared_ptr<TaskContext> task;
std::unique_ptr<FileLogDirectoryWatcher> directory_watch = nullptr;
void loadFiles();
void loadMetaFiles(bool attach);

143
tests/queries/0_stateless/02023_storage_filelog.reference
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@ -141,4 +141,147 @@
120 120
120 120
120 120
1 1
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250 250
OK

19
tests/queries/0_stateless/02023_storage_filelog.sh
View File

@ -10,7 +10,7 @@ CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
# Data preparation.
# Now we can get the user_files_path by use the table file function for trick. also we can get it by query as:
# "insert into function file('exist.txt', 'CSV', 'val1 char') values ('aaaa'); select _path from file('exist.txt', 'CSV', 'val1 char')"
user_files_path=$(clickhouse-client --query "select _path,_file from file('nonexist.txt', 'CSV', 'val1 char')" 2>&1 | grep Exception | awk '{gsub("/nonexist.txt","",$9); print $9}')
user_files_path=$(${CLICKHOUSE_CLIENT} --query "select _path,_file from file('nonexist.txt', 'CSV', 'val1 char')" 2>&1 | grep Exception | awk '{gsub("/nonexist.txt","",$9); print $9}')
mkdir -p ${user_files_path}/logs/
@ -41,11 +41,28 @@ touch ${user_files_path}/logs/a.txt
cp ${user_files_path}/logs/a.txt ${user_files_path}/logs/c.txt
cp ${user_files_path}/logs/a.txt ${user_files_path}/logs/d.txt
cp ${user_files_path}/logs/a.txt ${user_files_path}/logs/e.txt
mv ${user_files_path}/logs/b.txt ${user_files_path}/logs/j.txt
rm ${user_files_path}/logs/d.txt
${CLICKHOUSE_CLIENT} --query "select * from file_log order by k;"
${CLICKHOUSE_CLIENT} --query "detach table file_log;"
cp ${user_files_path}/logs/e.txt ${user_files_path}/logs/f.txt
mv ${user_files_path}/logs/e.txt ${user_files_path}/logs/g.txt
mv ${user_files_path}/logs/c.txt ${user_files_path}/logs/h.txt
for i in {150..200}
do
echo $i, $i >> ${user_files_path}/logs/h.txt
done
for i in {200..250}
do
echo $i, $i >> ${user_files_path}/logs/i.txt
done
${CLICKHOUSE_CLIENT} --query "attach table file_log;"
${CLICKHOUSE_CLIENT} --query "select * from file_log order by k;"
${CLICKHOUSE_CLIENT} --query "detach table file_log;"
${CLICKHOUSE_CLIENT} --query "attach table file_log;"

9
tests/queries/0_stateless/02024_storage_filelog_mv.sh
View File

@ -14,10 +14,6 @@ user_files_path=$(clickhouse-client --query "select _path,_file from file('nonex
mkdir -p ${user_files_path}/logs/
rm -rf ${user_files_path}/logs/*
for i in {1..20}
do
echo $i, $i >> ${user_files_path}/logs/a.txt
done
${CLICKHOUSE_CLIENT} --query "drop table if exists file_log;"
${CLICKHOUSE_CLIENT} --query "create table file_log(k UInt8, v UInt8) engine=FileLog('${user_files_path}/logs/', 'CSV');"
@ -25,6 +21,11 @@ ${CLICKHOUSE_CLIENT} --query "create table file_log(k UInt8, v UInt8) engine=Fil
${CLICKHOUSE_CLIENT} --query "drop table if exists mv;"
${CLICKHOUSE_CLIENT} --query "create Materialized View mv engine=MergeTree order by k as select * from file_log;"
for i in {1..20}
do
echo $i, $i >> ${user_files_path}/logs/a.txt
done
for i in {1..200}
do
sleep 0.1