mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-17 20:02:05 +00:00
Avoid taking lock
This commit is contained in:
Antonio Andelic
parent
9d30a7f056
commit
5c9aac484d
@ -57,7 +57,7 @@ int mainEntryClickHouseKeeperConverter(int argc, char ** argv)
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DB::KeeperSnapshotManager manager(1, keeper_context);
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auto snp = manager.serializeSnapshotToBuffer(snapshot);
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auto file_info = manager.serializeSnapshotBufferToDisk(*snp, storage.getZXID());
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std::cout << "Snapshot serialized to path:" << fs::path(file_info.disk->getPath()) / file_info.path << std::endl;
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std::cout << "Snapshot serialized to path:" << fs::path(file_info->disk->getPath()) / file_info->path << std::endl;
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}
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catch (...)
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{
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@ -13,8 +13,9 @@ struct CopyableAtomic
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: value(other.value.load())
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{}
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explicit CopyableAtomic(T && value_)
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: value(std::forward<T>(value_))
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template <std::convertible_to<T> U>
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explicit CopyableAtomic(U && value_)
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: value(std::forward<U>(value_))
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{}
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CopyableAtomic & operator=(const CopyableAtomic & other)
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@ -23,9 +24,10 @@ struct CopyableAtomic
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return *this;
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}
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CopyableAtomic & operator=(bool value_)
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template <std::convertible_to<T> U>
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CopyableAtomic & operator=(U && value_)
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{
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value = value_;
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value = std::forward<U>(value_);
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return *this;
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}
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@ -332,9 +332,10 @@ void KeeperDispatcher::snapshotThread()
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if (shutdown_called)
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break;
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if (snapshot_file_info.path.empty())
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if (!snapshot_file_info)
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continue;
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chassert(snapshot_file_info->disk != nullptr);
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if (isLeader())
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snapshot_s3.uploadSnapshot(snapshot_file_info);
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}
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@ -618,7 +618,7 @@ KeeperSnapshotManager::KeeperSnapshotManager(
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LOG_TRACE(log, "Found {} on {}", snapshot_file, disk->getName());
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size_t snapshot_up_to = getSnapshotPathUpToLogIdx(snapshot_file);
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auto [_, inserted] = existing_snapshots.insert_or_assign(snapshot_up_to, SnapshotFileInfo{snapshot_file, disk});
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auto [_, inserted] = existing_snapshots.insert_or_assign(snapshot_up_to, std::make_shared<SnapshotFileInfo>(snapshot_file, disk));
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if (!inserted)
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LOG_WARNING(
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@ -651,7 +651,7 @@ KeeperSnapshotManager::KeeperSnapshotManager(
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moveSnapshotsIfNeeded();
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}
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SnapshotFileInfo KeeperSnapshotManager::serializeSnapshotBufferToDisk(nuraft::buffer & buffer, uint64_t up_to_log_idx)
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SnapshotFileInfoPtr KeeperSnapshotManager::serializeSnapshotBufferToDisk(nuraft::buffer & buffer, uint64_t up_to_log_idx)
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{
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ReadBufferFromNuraftBuffer reader(buffer);
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@ -672,11 +672,12 @@ SnapshotFileInfo KeeperSnapshotManager::serializeSnapshotBufferToDisk(nuraft::bu
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disk->removeFile(tmp_snapshot_file_name);
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existing_snapshots.emplace(up_to_log_idx, SnapshotFileInfo{snapshot_file_name, disk});
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auto snapshot_file_info = std::make_shared<SnapshotFileInfo>(snapshot_file_name, disk);
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existing_snapshots.emplace(up_to_log_idx, snapshot_file_info);
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removeOutdatedSnapshotsIfNeeded();
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moveSnapshotsIfNeeded();
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return {snapshot_file_name, disk};
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return snapshot_file_info;
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}
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nuraft::ptr<nuraft::buffer> KeeperSnapshotManager::deserializeLatestSnapshotBufferFromDisk()
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@ -690,7 +691,7 @@ nuraft::ptr<nuraft::buffer> KeeperSnapshotManager::deserializeLatestSnapshotBuff
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}
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catch (const DB::Exception &)
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{
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const auto & [path, disk, size] = latest_itr->second;
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const auto & [path, disk, size] = *latest_itr->second;
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disk->removeFile(path);
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existing_snapshots.erase(latest_itr->first);
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tryLogCurrentException(__PRETTY_FUNCTION__);
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@ -702,7 +703,7 @@ nuraft::ptr<nuraft::buffer> KeeperSnapshotManager::deserializeLatestSnapshotBuff
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nuraft::ptr<nuraft::buffer> KeeperSnapshotManager::deserializeSnapshotBufferFromDisk(uint64_t up_to_log_idx) const
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{
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const auto & [snapshot_path, snapshot_disk, size] = existing_snapshots.at(up_to_log_idx);
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const auto & [snapshot_path, snapshot_disk, size] = *existing_snapshots.at(up_to_log_idx);
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WriteBufferFromNuraftBuffer writer;
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auto reader = snapshot_disk->readFile(snapshot_path);
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copyData(*reader, writer);
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@ -794,18 +795,18 @@ void KeeperSnapshotManager::moveSnapshotsIfNeeded()
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{
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if (idx == latest_snapshot_idx)
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{
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if (file_info.disk != latest_snapshot_disk)
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if (file_info->disk != latest_snapshot_disk)
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{
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moveSnapshotBetweenDisks(file_info.disk, file_info.path, latest_snapshot_disk, file_info.path, keeper_context);
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file_info.disk = latest_snapshot_disk;
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moveSnapshotBetweenDisks(file_info->disk, file_info->path, latest_snapshot_disk, file_info->path, keeper_context);
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file_info->disk = latest_snapshot_disk;
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}
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}
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else
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{
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if (file_info.disk != disk)
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if (file_info->disk != disk)
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{
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moveSnapshotBetweenDisks(file_info.disk, file_info.path, disk, file_info.path, keeper_context);
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file_info.disk = disk;
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moveSnapshotBetweenDisks(file_info->disk, file_info->path, disk, file_info->path, keeper_context);
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file_info->disk = disk;
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}
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}
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}
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@ -817,12 +818,12 @@ void KeeperSnapshotManager::removeSnapshot(uint64_t log_idx)
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auto itr = existing_snapshots.find(log_idx);
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if (itr == existing_snapshots.end())
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throw Exception(ErrorCodes::UNKNOWN_SNAPSHOT, "Unknown snapshot with log index {}", log_idx);
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const auto & [path, disk, size] = itr->second;
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const auto & [path, disk, size] = *itr->second;
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disk->removeFileIfExists(path);
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existing_snapshots.erase(itr);
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}
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SnapshotFileInfo KeeperSnapshotManager::serializeSnapshotToDisk(const KeeperStorageSnapshot & snapshot)
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SnapshotFileInfoPtr KeeperSnapshotManager::serializeSnapshotToDisk(const KeeperStorageSnapshot & snapshot)
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{
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auto up_to_log_idx = snapshot.snapshot_meta->get_last_log_idx();
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auto snapshot_file_name = getSnapshotFileName(up_to_log_idx, compress_snapshots_zstd);
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@ -847,7 +848,8 @@ SnapshotFileInfo KeeperSnapshotManager::serializeSnapshotToDisk(const KeeperStor
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disk->removeFile(tmp_snapshot_file_name);
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existing_snapshots.emplace(up_to_log_idx, SnapshotFileInfo{snapshot_file_name, disk});
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auto snapshot_file_info = std::make_shared<SnapshotFileInfo>(snapshot_file_name, disk);
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existing_snapshots.emplace(up_to_log_idx, snapshot_file_info);
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try
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{
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@ -859,7 +861,7 @@ SnapshotFileInfo KeeperSnapshotManager::serializeSnapshotToDisk(const KeeperStor
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tryLogCurrentException(log, "Failed to cleanup and/or move older snapshots");
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}
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return {snapshot_file_name, disk};
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return snapshot_file_info;
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}
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size_t KeeperSnapshotManager::getLatestSnapshotIndex() const
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@ -869,23 +871,23 @@ size_t KeeperSnapshotManager::getLatestSnapshotIndex() const
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return 0;
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}
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SnapshotFileInfo KeeperSnapshotManager::getLatestSnapshotInfo() const
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SnapshotFileInfoPtr KeeperSnapshotManager::getLatestSnapshotInfo() const
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{
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if (!existing_snapshots.empty())
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{
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const auto & [path, disk, size] = existing_snapshots.at(getLatestSnapshotIndex());
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const auto & [path, disk, size] = *existing_snapshots.at(getLatestSnapshotIndex());
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try
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{
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if (disk->exists(path))
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return {path, disk};
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return std::make_shared<SnapshotFileInfo>(path, disk);
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}
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catch (...)
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{
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tryLogCurrentException(log);
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}
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}
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return {"", nullptr};
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return nullptr;
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}
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}
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@ -1,5 +1,6 @@
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#pragma once
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#include <Coordination/KeeperStorage.h>
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#include <Common/CopyableAtomic.h>
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#include <libnuraft/nuraft.hxx>
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namespace DB
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@ -93,13 +94,20 @@ public:
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struct SnapshotFileInfo
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{
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SnapshotFileInfo(std::string path_, DiskPtr disk_)
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: path(std::move(path_))
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, disk(std::move(disk_))
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{}
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std::string path;
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DiskPtr disk;
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mutable std::optional<size_t> size = std::nullopt;
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mutable std::atomic<size_t> size{0};
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};
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using SnapshotFileInfoPtr = std::shared_ptr<SnapshotFileInfo>;
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using KeeperStorageSnapshotPtr = std::shared_ptr<KeeperStorageSnapshot>;
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using CreateSnapshotCallback = std::function<SnapshotFileInfo(KeeperStorageSnapshotPtr &&, bool)>;
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using CreateSnapshotCallback = std::function<std::shared_ptr<SnapshotFileInfo>(KeeperStorageSnapshotPtr &&, bool)>;
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using SnapshotMetaAndStorage = std::pair<SnapshotMetadataPtr, KeeperStoragePtr>;
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@ -122,10 +130,10 @@ public:
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nuraft::ptr<nuraft::buffer> serializeSnapshotToBuffer(const KeeperStorageSnapshot & snapshot) const;
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/// Serialize already compressed snapshot to disk (return path)
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SnapshotFileInfo serializeSnapshotBufferToDisk(nuraft::buffer & buffer, uint64_t up_to_log_idx);
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SnapshotFileInfoPtr serializeSnapshotBufferToDisk(nuraft::buffer & buffer, uint64_t up_to_log_idx);
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/// Serialize snapshot directly to disk
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SnapshotFileInfo serializeSnapshotToDisk(const KeeperStorageSnapshot & snapshot);
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SnapshotFileInfoPtr serializeSnapshotToDisk(const KeeperStorageSnapshot & snapshot);
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SnapshotDeserializationResult deserializeSnapshotFromBuffer(nuraft::ptr<nuraft::buffer> buffer) const;
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@ -144,7 +152,7 @@ public:
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/// The most fresh snapshot log index we have
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size_t getLatestSnapshotIndex() const;
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SnapshotFileInfo getLatestSnapshotInfo() const;
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SnapshotFileInfoPtr getLatestSnapshotInfo() const;
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private:
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void removeOutdatedSnapshotsIfNeeded();
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@ -160,7 +168,7 @@ private:
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/// How many snapshots to keep before remove
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const size_t snapshots_to_keep;
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/// All existing snapshots in our path (log_index -> path)
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std::map<uint64_t, SnapshotFileInfo> existing_snapshots;
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std::map<uint64_t, SnapshotFileInfoPtr> existing_snapshots;
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/// Compress snapshots in common ZSTD format instead of custom ClickHouse block LZ4 format
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const bool compress_snapshots_zstd;
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/// Superdigest for deserialization of storage
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@ -145,9 +145,9 @@ std::shared_ptr<KeeperSnapshotManagerS3::S3Configuration> KeeperSnapshotManagerS
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return snapshot_s3_client;
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}
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void KeeperSnapshotManagerS3::uploadSnapshotImpl(const SnapshotFileInfo & snapshot_file_info)
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void KeeperSnapshotManagerS3::uploadSnapshotImpl(const SnapshotFileInfoPtr & snapshot_file_info)
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{
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const auto & [snapshot_path, snapshot_disk, snapshot_size] = snapshot_file_info;
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const auto & [snapshot_path, snapshot_disk, snapshot_size] = *snapshot_file_info;
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try
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{
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auto s3_client = getSnapshotS3Client();
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@ -169,9 +169,9 @@ void KeeperSnapshotManagerS3::uploadSnapshotImpl(const SnapshotFileInfo & snapsh
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);
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};
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LOG_INFO(log, "Will try to upload snapshot on {} to S3", snapshot_file_info.path);
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LOG_INFO(log, "Will try to upload snapshot on {} to S3", snapshot_path);
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auto snapshot_file = snapshot_disk->readFile(snapshot_file_info.path);
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auto snapshot_file = snapshot_disk->readFile(snapshot_path);
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auto snapshot_name = fs::path(snapshot_path).filename().string();
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auto lock_file = fmt::format(".{}_LOCK", snapshot_name);
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@ -261,7 +261,7 @@ void KeeperSnapshotManagerS3::snapshotS3Thread()
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while (!shutdown_called)
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{
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SnapshotFileInfo snapshot_file_info;
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SnapshotFileInfoPtr snapshot_file_info;
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if (!snapshots_s3_queue.pop(snapshot_file_info))
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break;
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@ -272,7 +272,7 @@ void KeeperSnapshotManagerS3::snapshotS3Thread()
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}
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}
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void KeeperSnapshotManagerS3::uploadSnapshot(const SnapshotFileInfo & file_info, bool async_upload)
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void KeeperSnapshotManagerS3::uploadSnapshot(const SnapshotFileInfoPtr & file_info, bool async_upload)
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{
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if (getSnapshotS3Client() == nullptr)
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return;
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@ -280,7 +280,7 @@ void KeeperSnapshotManagerS3::uploadSnapshot(const SnapshotFileInfo & file_info,
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if (async_upload)
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{
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if (!snapshots_s3_queue.push(file_info))
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LOG_WARNING(log, "Failed to add snapshot {} to S3 queue", file_info.path);
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LOG_WARNING(log, "Failed to add snapshot {} to S3 queue", file_info->path);
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return;
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}
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@ -12,8 +12,6 @@
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#include <Common/ConcurrentBoundedQueue.h>
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#include <Common/ThreadPool.h>
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#include <string>
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#endif
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namespace DB
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@ -27,13 +25,13 @@ public:
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/// 'macros' are used to substitute macros in endpoint of disks
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void updateS3Configuration(const Poco::Util::AbstractConfiguration & config, const MultiVersion<Macros>::Version & macros);
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void uploadSnapshot(const SnapshotFileInfo & file_info, bool async_upload = true);
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void uploadSnapshot(const SnapshotFileInfoPtr & file_info, bool async_upload = true);
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/// 'macros' are used to substitute macros in endpoint of disks
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void startup(const Poco::Util::AbstractConfiguration & config, const MultiVersion<Macros>::Version & macros);
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void shutdown();
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private:
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using SnapshotS3Queue = ConcurrentBoundedQueue<SnapshotFileInfo>;
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using SnapshotS3Queue = ConcurrentBoundedQueue<SnapshotFileInfoPtr>;
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SnapshotS3Queue snapshots_s3_queue;
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/// Upload new snapshots to S3
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@ -51,7 +49,7 @@ private:
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std::shared_ptr<S3Configuration> getSnapshotS3Client() const;
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void uploadSnapshotImpl(const SnapshotFileInfo & snapshot_file_info);
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void uploadSnapshotImpl(const SnapshotFileInfoPtr & snapshot_file_info);
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/// Thread upload snapshots to S3 in the background
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void snapshotS3Thread();
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@ -1,3 +1,4 @@
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#include <atomic>
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#include <cerrno>
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#include <Coordination/KeeperSnapshotManager.h>
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#include <Coordination/KeeperStateMachine.h>
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@ -90,8 +91,9 @@ void KeeperStateMachine::init()
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latest_snapshot_buf = snapshot_manager.deserializeSnapshotBufferFromDisk(latest_log_index);
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auto snapshot_deserialization_result = snapshot_manager.deserializeSnapshotFromBuffer(latest_snapshot_buf);
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latest_snapshot_info = snapshot_manager.getLatestSnapshotInfo();
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chassert(latest_snapshot_info);
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if (isLocalDisk(*latest_snapshot_info.disk))
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if (isLocalDisk(*latest_snapshot_info->disk))
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latest_snapshot_buf = nullptr;
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storage = std::move(snapshot_deserialization_result.storage);
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@ -603,7 +605,11 @@ void KeeperStateMachine::create_snapshot(nuraft::snapshot & s, nuraft::async_res
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}
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ProfileEvents::increment(ProfileEvents::KeeperSnapshotCreations);
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LOG_DEBUG(log, "Created persistent snapshot {} with path {}", latest_snapshot_meta->get_last_log_idx(), latest_snapshot_info.path);
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LOG_DEBUG(
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log,
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"Created persistent snapshot {} with path {}",
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latest_snapshot_meta->get_last_log_idx(),
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latest_snapshot_info->path);
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}
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}
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}
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@ -627,7 +633,7 @@ void KeeperStateMachine::create_snapshot(nuraft::snapshot & s, nuraft::async_res
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when_done(ret, exception);
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return ret ? latest_snapshot_info : SnapshotFileInfo{};
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return ret ? latest_snapshot_info : nullptr;
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};
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if (keeper_context->getServerState() == KeeperContext::Phase::SHUTDOWN)
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@ -635,9 +641,9 @@ void KeeperStateMachine::create_snapshot(nuraft::snapshot & s, nuraft::async_res
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LOG_INFO(log, "Creating a snapshot during shutdown because 'create_snapshot_on_exit' is enabled.");
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auto snapshot_file_info = snapshot_task.create_snapshot(std::move(snapshot_task.snapshot), /*execute_only_cleanup=*/false);
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if (!snapshot_file_info.path.empty() && snapshot_manager_s3)
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if (snapshot_file_info && snapshot_manager_s3)
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{
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LOG_INFO(log, "Uploading snapshot {} during shutdown because 'upload_snapshot_on_exit' is enabled.", snapshot_file_info.path);
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LOG_INFO(log, "Uploading snapshot {} during shutdown because 'upload_snapshot_on_exit' is enabled.", snapshot_file_info->path);
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snapshot_manager_s3->uploadSnapshot(snapshot_file_info, /* asnyc_upload */ false);
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}
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@ -672,7 +678,7 @@ void KeeperStateMachine::save_logical_snp_obj(
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latest_snapshot_info = snapshot_manager.serializeSnapshotBufferToDisk(data, s.get_last_log_idx());
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latest_snapshot_meta = cloned_meta;
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latest_snapshot_buf = std::move(cloned_buffer);
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LOG_DEBUG(log, "Saved snapshot {} to path {}", s.get_last_log_idx(), latest_snapshot_info.path);
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LOG_DEBUG(log, "Saved snapshot {} to path {}", s.get_last_log_idx(), latest_snapshot_info->path);
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obj_id++;
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ProfileEvents::increment(ProfileEvents::KeeperSaveSnapshot);
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}
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@ -733,7 +739,7 @@ int KeeperStateMachine::read_logical_snp_obj(
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return -1;
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}
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const auto & [path, disk, size] = latest_snapshot_info;
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const auto & [path, disk, size] = *latest_snapshot_info;
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if (isLocalDisk(*disk))
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{
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auto full_path = fs::path(disk->getPath()) / path;
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@ -864,14 +870,25 @@ uint64_t KeeperStateMachine::getKeyArenaSize() const
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uint64_t KeeperStateMachine::getLatestSnapshotSize() const
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{
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std::lock_guard lock(snapshots_lock);
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if (latest_snapshot_info.disk == nullptr)
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auto snapshot_info = [&]
|
||||
{
|
||||
std::lock_guard lock(snapshots_lock);
|
||||
return latest_snapshot_info;
|
||||
}();
|
||||
|
||||
if (snapshot_info == nullptr || snapshot_info->disk == nullptr)
|
||||
return 0;
|
||||
|
||||
if (!latest_snapshot_info.size.has_value())
|
||||
latest_snapshot_info.size = latest_snapshot_info.disk->getFileSize(latest_snapshot_info.path);
|
||||
/// there is a possibility multiple threads can try to get size
|
||||
/// this can happen in rare cases while it's not a heavy operation
|
||||
size_t size = snapshot_info->size.load(std::memory_order_relaxed);
|
||||
if (size == 0)
|
||||
{
|
||||
size = snapshot_info->disk->getFileSize(snapshot_info->path);
|
||||
snapshot_info->size.store(size, std::memory_order_relaxed);
|
||||
}
|
||||
|
||||
return *latest_snapshot_info.size;
|
||||
return size;
|
||||
}
|
||||
|
||||
ClusterConfigPtr KeeperStateMachine::getClusterConfig() const
|
||||
|
||||
@ -135,7 +135,7 @@ private:
|
||||
/// In our state machine we always have a single snapshot which is stored
|
||||
/// in memory in compressed (serialized) format.
|
||||
SnapshotMetadataPtr latest_snapshot_meta = nullptr;
|
||||
SnapshotFileInfo latest_snapshot_info;
|
||||
std::shared_ptr<SnapshotFileInfo> latest_snapshot_info;
|
||||
nuraft::ptr<nuraft::buffer> latest_snapshot_buf = nullptr;
|
||||
|
||||
/// Main state machine logic
|
||||
|
||||
Loading…
Reference in New Issue
Block a user