mirror of https://github.com/facebook/rocksdb.git
3293 lines
124 KiB
C++
3293 lines
124 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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//
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#include <cinttypes>
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#include "db/builder.h"
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#include "db/db_impl/db_impl.h"
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#include "db/error_handler.h"
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#include "db/event_helpers.h"
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#include "file/sst_file_manager_impl.h"
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#include "monitoring/iostats_context_imp.h"
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#include "monitoring/perf_context_imp.h"
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#include "monitoring/thread_status_updater.h"
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#include "monitoring/thread_status_util.h"
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#include "test_util/sync_point.h"
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#include "util/cast_util.h"
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#include "util/concurrent_task_limiter_impl.h"
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namespace ROCKSDB_NAMESPACE {
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bool DBImpl::EnoughRoomForCompaction(
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ColumnFamilyData* cfd, const std::vector<CompactionInputFiles>& inputs,
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bool* sfm_reserved_compact_space, LogBuffer* log_buffer) {
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// Check if we have enough room to do the compaction
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bool enough_room = true;
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#ifndef ROCKSDB_LITE
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auto sfm = static_cast<SstFileManagerImpl*>(
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immutable_db_options_.sst_file_manager.get());
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if (sfm) {
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// Pass the current bg_error_ to SFM so it can decide what checks to
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// perform. If this DB instance hasn't seen any error yet, the SFM can be
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// optimistic and not do disk space checks
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enough_room =
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sfm->EnoughRoomForCompaction(cfd, inputs, error_handler_.GetBGError());
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if (enough_room) {
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*sfm_reserved_compact_space = true;
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}
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}
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#else
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(void)cfd;
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(void)inputs;
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(void)sfm_reserved_compact_space;
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#endif // ROCKSDB_LITE
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if (!enough_room) {
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// Just in case tests want to change the value of enough_room
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TEST_SYNC_POINT_CALLBACK(
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"DBImpl::BackgroundCompaction():CancelledCompaction", &enough_room);
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ROCKS_LOG_BUFFER(log_buffer,
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"Cancelled compaction because not enough room");
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RecordTick(stats_, COMPACTION_CANCELLED, 1);
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}
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return enough_room;
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}
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bool DBImpl::RequestCompactionToken(ColumnFamilyData* cfd, bool force,
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std::unique_ptr<TaskLimiterToken>* token,
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LogBuffer* log_buffer) {
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assert(*token == nullptr);
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auto limiter = static_cast<ConcurrentTaskLimiterImpl*>(
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cfd->ioptions()->compaction_thread_limiter.get());
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if (limiter == nullptr) {
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return true;
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}
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*token = limiter->GetToken(force);
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if (*token != nullptr) {
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ROCKS_LOG_BUFFER(log_buffer,
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"Thread limiter [%s] increase [%s] compaction task, "
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"force: %s, tasks after: %d",
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limiter->GetName().c_str(), cfd->GetName().c_str(),
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force ? "true" : "false", limiter->GetOutstandingTask());
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return true;
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}
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return false;
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}
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IOStatus DBImpl::SyncClosedLogs(JobContext* job_context) {
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TEST_SYNC_POINT("DBImpl::SyncClosedLogs:Start");
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mutex_.AssertHeld();
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autovector<log::Writer*, 1> logs_to_sync;
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uint64_t current_log_number = logfile_number_;
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while (logs_.front().number < current_log_number &&
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logs_.front().getting_synced) {
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log_sync_cv_.Wait();
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}
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for (auto it = logs_.begin();
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it != logs_.end() && it->number < current_log_number; ++it) {
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auto& log = *it;
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assert(!log.getting_synced);
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log.getting_synced = true;
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logs_to_sync.push_back(log.writer);
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}
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IOStatus io_s;
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if (!logs_to_sync.empty()) {
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mutex_.Unlock();
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for (log::Writer* log : logs_to_sync) {
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ROCKS_LOG_INFO(immutable_db_options_.info_log,
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"[JOB %d] Syncing log #%" PRIu64, job_context->job_id,
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log->get_log_number());
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io_s = log->file()->Sync(immutable_db_options_.use_fsync);
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if (!io_s.ok()) {
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break;
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}
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if (immutable_db_options_.recycle_log_file_num > 0) {
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io_s = log->Close();
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if (!io_s.ok()) {
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break;
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}
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}
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}
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if (io_s.ok()) {
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io_s = directories_.GetWalDir()->Fsync(IOOptions(), nullptr);
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}
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mutex_.Lock();
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// "number <= current_log_number - 1" is equivalent to
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// "number < current_log_number".
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MarkLogsSynced(current_log_number - 1, true, io_s);
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if (!io_s.ok()) {
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if (total_log_size_ > 0) {
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error_handler_.SetBGError(io_s, BackgroundErrorReason::kFlush);
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} else {
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// If the WAL is empty, we use different error reason
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error_handler_.SetBGError(io_s, BackgroundErrorReason::kFlushNoWAL);
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}
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TEST_SYNC_POINT("DBImpl::SyncClosedLogs:Failed");
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return io_s;
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}
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}
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return io_s;
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}
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Status DBImpl::FlushMemTableToOutputFile(
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ColumnFamilyData* cfd, const MutableCFOptions& mutable_cf_options,
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bool* made_progress, JobContext* job_context,
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SuperVersionContext* superversion_context,
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std::vector<SequenceNumber>& snapshot_seqs,
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SequenceNumber earliest_write_conflict_snapshot,
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SnapshotChecker* snapshot_checker, LogBuffer* log_buffer,
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Env::Priority thread_pri) {
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mutex_.AssertHeld();
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assert(cfd);
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assert(cfd->imm()->NumNotFlushed() != 0);
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assert(cfd->imm()->IsFlushPending());
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FlushJob flush_job(
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dbname_, cfd, immutable_db_options_, mutable_cf_options,
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nullptr /* memtable_id */, file_options_for_compaction_, versions_.get(),
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&mutex_, &shutting_down_, snapshot_seqs, earliest_write_conflict_snapshot,
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snapshot_checker, job_context, log_buffer, directories_.GetDbDir(),
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GetDataDir(cfd, 0U),
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GetCompressionFlush(*cfd->ioptions(), mutable_cf_options), stats_,
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&event_logger_, mutable_cf_options.report_bg_io_stats,
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true /* sync_output_directory */, true /* write_manifest */, thread_pri,
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io_tracer_, db_id_, db_session_id_);
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FileMetaData file_meta;
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TEST_SYNC_POINT("DBImpl::FlushMemTableToOutputFile:BeforePickMemtables");
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flush_job.PickMemTable();
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TEST_SYNC_POINT("DBImpl::FlushMemTableToOutputFile:AfterPickMemtables");
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#ifndef ROCKSDB_LITE
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// may temporarily unlock and lock the mutex.
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NotifyOnFlushBegin(cfd, &file_meta, mutable_cf_options, job_context->job_id);
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#endif // ROCKSDB_LITE
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Status s;
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IOStatus io_s = IOStatus::OK();
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if (logfile_number_ > 0 &&
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versions_->GetColumnFamilySet()->NumberOfColumnFamilies() > 1) {
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// If there are more than one column families, we need to make sure that
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// all the log files except the most recent one are synced. Otherwise if
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// the host crashes after flushing and before WAL is persistent, the
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// flushed SST may contain data from write batches whose updates to
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// other column families are missing.
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// SyncClosedLogs() may unlock and re-lock the db_mutex.
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io_s = SyncClosedLogs(job_context);
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s = io_s;
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if (!io_s.ok() && !io_s.IsShutdownInProgress() &&
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!io_s.IsColumnFamilyDropped()) {
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error_handler_.SetBGError(io_s, BackgroundErrorReason::kFlush);
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}
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} else {
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TEST_SYNC_POINT("DBImpl::SyncClosedLogs:Skip");
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}
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// Within flush_job.Run, rocksdb may call event listener to notify
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// file creation and deletion.
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//
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// Note that flush_job.Run will unlock and lock the db_mutex,
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// and EventListener callback will be called when the db_mutex
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// is unlocked by the current thread.
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if (s.ok()) {
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s = flush_job.Run(&logs_with_prep_tracker_, &file_meta);
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} else {
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flush_job.Cancel();
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}
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if (io_s.ok()) {
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io_s = flush_job.io_status();
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}
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if (s.ok()) {
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InstallSuperVersionAndScheduleWork(cfd, superversion_context,
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mutable_cf_options);
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if (made_progress) {
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*made_progress = true;
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}
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const std::string& column_family_name = cfd->GetName();
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Version* const current = cfd->current();
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assert(current);
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const VersionStorageInfo* const storage_info = current->storage_info();
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assert(storage_info);
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VersionStorageInfo::LevelSummaryStorage tmp;
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ROCKS_LOG_BUFFER(log_buffer, "[%s] Level summary: %s\n",
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column_family_name.c_str(),
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storage_info->LevelSummary(&tmp));
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const auto& blob_files = storage_info->GetBlobFiles();
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if (!blob_files.empty()) {
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ROCKS_LOG_BUFFER(log_buffer,
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"[%s] Blob file summary: head=%" PRIu64 ", tail=%" PRIu64
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"\n",
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column_family_name.c_str(), blob_files.begin()->first,
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blob_files.rbegin()->first);
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}
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}
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if (!s.ok() && !s.IsShutdownInProgress() && !s.IsColumnFamilyDropped()) {
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if (!io_s.ok() && !io_s.IsShutdownInProgress() &&
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!io_s.IsColumnFamilyDropped()) {
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// Error while writing to MANIFEST.
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// In fact, versions_->io_status() can also be the result of renaming
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// CURRENT file. With current code, it's just difficult to tell. So just
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// be pessimistic and try write to a new MANIFEST.
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// TODO: distinguish between MANIFEST write and CURRENT renaming
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if (!versions_->io_status().ok()) {
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error_handler_.SetBGError(io_s, BackgroundErrorReason::kManifestWrite);
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} else if (total_log_size_ > 0) {
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error_handler_.SetBGError(io_s, BackgroundErrorReason::kFlush);
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} else {
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// If the WAL is empty, we use different error reason
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error_handler_.SetBGError(io_s, BackgroundErrorReason::kFlushNoWAL);
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}
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} else {
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Status new_bg_error = s;
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error_handler_.SetBGError(new_bg_error, BackgroundErrorReason::kFlush);
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}
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} else {
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// If we got here, then we decided not to care about the i_os status (either
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// from never needing it or ignoring the flush job status
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io_s.PermitUncheckedError();
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}
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if (s.ok()) {
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#ifndef ROCKSDB_LITE
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// may temporarily unlock and lock the mutex.
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NotifyOnFlushCompleted(cfd, mutable_cf_options,
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flush_job.GetCommittedFlushJobsInfo());
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auto sfm = static_cast<SstFileManagerImpl*>(
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immutable_db_options_.sst_file_manager.get());
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if (sfm) {
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// Notify sst_file_manager that a new file was added
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std::string file_path = MakeTableFileName(
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cfd->ioptions()->cf_paths[0].path, file_meta.fd.GetNumber());
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sfm->OnAddFile(file_path);
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if (sfm->IsMaxAllowedSpaceReached()) {
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Status new_bg_error =
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Status::SpaceLimit("Max allowed space was reached");
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TEST_SYNC_POINT_CALLBACK(
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"DBImpl::FlushMemTableToOutputFile:MaxAllowedSpaceReached",
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&new_bg_error);
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error_handler_.SetBGError(new_bg_error, BackgroundErrorReason::kFlush);
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}
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}
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#endif // ROCKSDB_LITE
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}
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TEST_SYNC_POINT("DBImpl::FlushMemTableToOutputFile:Finish");
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return s;
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}
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Status DBImpl::FlushMemTablesToOutputFiles(
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const autovector<BGFlushArg>& bg_flush_args, bool* made_progress,
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JobContext* job_context, LogBuffer* log_buffer, Env::Priority thread_pri) {
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if (immutable_db_options_.atomic_flush) {
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return AtomicFlushMemTablesToOutputFiles(
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bg_flush_args, made_progress, job_context, log_buffer, thread_pri);
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}
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std::vector<SequenceNumber> snapshot_seqs;
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SequenceNumber earliest_write_conflict_snapshot;
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SnapshotChecker* snapshot_checker;
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GetSnapshotContext(job_context, &snapshot_seqs,
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&earliest_write_conflict_snapshot, &snapshot_checker);
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Status status;
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for (auto& arg : bg_flush_args) {
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ColumnFamilyData* cfd = arg.cfd_;
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MutableCFOptions mutable_cf_options = *cfd->GetLatestMutableCFOptions();
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SuperVersionContext* superversion_context = arg.superversion_context_;
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Status s = FlushMemTableToOutputFile(
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cfd, mutable_cf_options, made_progress, job_context,
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superversion_context, snapshot_seqs, earliest_write_conflict_snapshot,
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snapshot_checker, log_buffer, thread_pri);
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if (!s.ok()) {
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status = s;
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if (!s.IsShutdownInProgress() && !s.IsColumnFamilyDropped()) {
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// At this point, DB is not shutting down, nor is cfd dropped.
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// Something is wrong, thus we break out of the loop.
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break;
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}
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}
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}
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return status;
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}
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/*
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* Atomically flushes multiple column families.
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*
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* For each column family, all memtables with ID smaller than or equal to the
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* ID specified in bg_flush_args will be flushed. Only after all column
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* families finish flush will this function commit to MANIFEST. If any of the
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* column families are not flushed successfully, this function does not have
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* any side-effect on the state of the database.
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*/
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Status DBImpl::AtomicFlushMemTablesToOutputFiles(
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const autovector<BGFlushArg>& bg_flush_args, bool* made_progress,
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JobContext* job_context, LogBuffer* log_buffer, Env::Priority thread_pri) {
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mutex_.AssertHeld();
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autovector<ColumnFamilyData*> cfds;
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for (const auto& arg : bg_flush_args) {
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cfds.emplace_back(arg.cfd_);
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}
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#ifndef NDEBUG
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for (const auto cfd : cfds) {
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assert(cfd->imm()->NumNotFlushed() != 0);
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assert(cfd->imm()->IsFlushPending());
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}
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#endif /* !NDEBUG */
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std::vector<SequenceNumber> snapshot_seqs;
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SequenceNumber earliest_write_conflict_snapshot;
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SnapshotChecker* snapshot_checker;
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GetSnapshotContext(job_context, &snapshot_seqs,
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&earliest_write_conflict_snapshot, &snapshot_checker);
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autovector<FSDirectory*> distinct_output_dirs;
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autovector<std::string> distinct_output_dir_paths;
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std::vector<std::unique_ptr<FlushJob>> jobs;
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std::vector<MutableCFOptions> all_mutable_cf_options;
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int num_cfs = static_cast<int>(cfds.size());
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all_mutable_cf_options.reserve(num_cfs);
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for (int i = 0; i < num_cfs; ++i) {
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auto cfd = cfds[i];
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FSDirectory* data_dir = GetDataDir(cfd, 0U);
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const std::string& curr_path = cfd->ioptions()->cf_paths[0].path;
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// Add to distinct output directories if eligible. Use linear search. Since
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// the number of elements in the vector is not large, performance should be
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// tolerable.
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bool found = false;
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for (const auto& path : distinct_output_dir_paths) {
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if (path == curr_path) {
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found = true;
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break;
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}
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}
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if (!found) {
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distinct_output_dir_paths.emplace_back(curr_path);
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distinct_output_dirs.emplace_back(data_dir);
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}
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all_mutable_cf_options.emplace_back(*cfd->GetLatestMutableCFOptions());
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const MutableCFOptions& mutable_cf_options = all_mutable_cf_options.back();
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const uint64_t* max_memtable_id = &(bg_flush_args[i].max_memtable_id_);
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jobs.emplace_back(new FlushJob(
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dbname_, cfd, immutable_db_options_, mutable_cf_options,
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max_memtable_id, file_options_for_compaction_, versions_.get(), &mutex_,
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&shutting_down_, snapshot_seqs, earliest_write_conflict_snapshot,
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snapshot_checker, job_context, log_buffer, directories_.GetDbDir(),
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data_dir, GetCompressionFlush(*cfd->ioptions(), mutable_cf_options),
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stats_, &event_logger_, mutable_cf_options.report_bg_io_stats,
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false /* sync_output_directory */, false /* write_manifest */,
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thread_pri, io_tracer_, db_id_, db_session_id_));
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jobs.back()->PickMemTable();
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}
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std::vector<FileMetaData> file_meta(num_cfs);
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Status s;
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IOStatus io_s;
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assert(num_cfs == static_cast<int>(jobs.size()));
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#ifndef ROCKSDB_LITE
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for (int i = 0; i != num_cfs; ++i) {
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const MutableCFOptions& mutable_cf_options = all_mutable_cf_options.at(i);
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// may temporarily unlock and lock the mutex.
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NotifyOnFlushBegin(cfds[i], &file_meta[i], mutable_cf_options,
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job_context->job_id);
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}
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#endif /* !ROCKSDB_LITE */
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if (logfile_number_ > 0) {
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// TODO (yanqin) investigate whether we should sync the closed logs for
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// single column family case.
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io_s = SyncClosedLogs(job_context);
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s = io_s;
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}
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// exec_status stores the execution status of flush_jobs as
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// <bool /* executed */, Status /* status code */>
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autovector<std::pair<bool, Status>> exec_status;
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autovector<IOStatus> io_status;
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for (int i = 0; i != num_cfs; ++i) {
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// Initially all jobs are not executed, with status OK.
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exec_status.emplace_back(false, Status::OK());
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io_status.emplace_back(IOStatus::OK());
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}
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if (s.ok()) {
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// TODO (yanqin): parallelize jobs with threads.
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for (int i = 1; i != num_cfs; ++i) {
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exec_status[i].second =
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jobs[i]->Run(&logs_with_prep_tracker_, &file_meta[i]);
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exec_status[i].first = true;
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io_status[i] = jobs[i]->io_status();
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}
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if (num_cfs > 1) {
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TEST_SYNC_POINT(
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"DBImpl::AtomicFlushMemTablesToOutputFiles:SomeFlushJobsComplete:1");
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TEST_SYNC_POINT(
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"DBImpl::AtomicFlushMemTablesToOutputFiles:SomeFlushJobsComplete:2");
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|
}
|
|
assert(exec_status.size() > 0);
|
|
assert(!file_meta.empty());
|
|
exec_status[0].second =
|
|
jobs[0]->Run(&logs_with_prep_tracker_, &file_meta[0]);
|
|
exec_status[0].first = true;
|
|
io_status[0] = jobs[0]->io_status();
|
|
|
|
Status error_status;
|
|
for (const auto& e : exec_status) {
|
|
if (!e.second.ok()) {
|
|
s = e.second;
|
|
if (!e.second.IsShutdownInProgress() &&
|
|
!e.second.IsColumnFamilyDropped()) {
|
|
// If a flush job did not return OK, and the CF is not dropped, and
|
|
// the DB is not shutting down, then we have to return this result to
|
|
// caller later.
|
|
error_status = e.second;
|
|
}
|
|
}
|
|
}
|
|
|
|
s = error_status.ok() ? s : error_status;
|
|
}
|
|
|
|
if (io_s.ok()) {
|
|
IOStatus io_error = IOStatus::OK();
|
|
for (int i = 0; i != static_cast<int>(io_status.size()); i++) {
|
|
if (!io_status[i].ok() && !io_status[i].IsShutdownInProgress() &&
|
|
!io_status[i].IsColumnFamilyDropped()) {
|
|
io_error = io_status[i];
|
|
}
|
|
}
|
|
io_s = io_error;
|
|
if (s.ok() && !io_s.ok()) {
|
|
s = io_s;
|
|
}
|
|
}
|
|
|
|
if (s.IsColumnFamilyDropped()) {
|
|
s = Status::OK();
|
|
}
|
|
|
|
if (s.ok() || s.IsShutdownInProgress()) {
|
|
// Sync on all distinct output directories.
|
|
for (auto dir : distinct_output_dirs) {
|
|
if (dir != nullptr) {
|
|
Status error_status = dir->Fsync(IOOptions(), nullptr);
|
|
if (!error_status.ok()) {
|
|
s = error_status;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
// Need to undo atomic flush if something went wrong, i.e. s is not OK and
|
|
// it is not because of CF drop.
|
|
// Have to cancel the flush jobs that have NOT executed because we need to
|
|
// unref the versions.
|
|
for (int i = 0; i != num_cfs; ++i) {
|
|
if (!exec_status[i].first) {
|
|
jobs[i]->Cancel();
|
|
}
|
|
}
|
|
for (int i = 0; i != num_cfs; ++i) {
|
|
if (exec_status[i].first && exec_status[i].second.ok()) {
|
|
auto& mems = jobs[i]->GetMemTables();
|
|
cfds[i]->imm()->RollbackMemtableFlush(mems,
|
|
file_meta[i].fd.GetNumber());
|
|
}
|
|
}
|
|
}
|
|
|
|
if (s.ok()) {
|
|
auto wait_to_install_func = [&]() {
|
|
bool ready = true;
|
|
for (size_t i = 0; i != cfds.size(); ++i) {
|
|
const auto& mems = jobs[i]->GetMemTables();
|
|
if (cfds[i]->IsDropped()) {
|
|
// If the column family is dropped, then do not wait.
|
|
continue;
|
|
} else if (!mems.empty() &&
|
|
cfds[i]->imm()->GetEarliestMemTableID() < mems[0]->GetID()) {
|
|
// If a flush job needs to install the flush result for mems and
|
|
// mems[0] is not the earliest memtable, it means another thread must
|
|
// be installing flush results for the same column family, then the
|
|
// current thread needs to wait.
|
|
ready = false;
|
|
break;
|
|
} else if (mems.empty() && cfds[i]->imm()->GetEarliestMemTableID() <=
|
|
bg_flush_args[i].max_memtable_id_) {
|
|
// If a flush job does not need to install flush results, then it has
|
|
// to wait until all memtables up to max_memtable_id_ (inclusive) are
|
|
// installed.
|
|
ready = false;
|
|
break;
|
|
}
|
|
}
|
|
return ready;
|
|
};
|
|
|
|
bool resuming_from_bg_err = error_handler_.IsDBStopped();
|
|
while ((!error_handler_.IsDBStopped() ||
|
|
error_handler_.GetRecoveryError().ok()) &&
|
|
!wait_to_install_func()) {
|
|
atomic_flush_install_cv_.Wait();
|
|
}
|
|
|
|
s = resuming_from_bg_err ? error_handler_.GetRecoveryError()
|
|
: error_handler_.GetBGError();
|
|
}
|
|
|
|
if (s.ok()) {
|
|
autovector<ColumnFamilyData*> tmp_cfds;
|
|
autovector<const autovector<MemTable*>*> mems_list;
|
|
autovector<const MutableCFOptions*> mutable_cf_options_list;
|
|
autovector<FileMetaData*> tmp_file_meta;
|
|
for (int i = 0; i != num_cfs; ++i) {
|
|
const auto& mems = jobs[i]->GetMemTables();
|
|
if (!cfds[i]->IsDropped() && !mems.empty()) {
|
|
tmp_cfds.emplace_back(cfds[i]);
|
|
mems_list.emplace_back(&mems);
|
|
mutable_cf_options_list.emplace_back(&all_mutable_cf_options[i]);
|
|
tmp_file_meta.emplace_back(&file_meta[i]);
|
|
}
|
|
}
|
|
|
|
s = InstallMemtableAtomicFlushResults(
|
|
nullptr /* imm_lists */, tmp_cfds, mutable_cf_options_list, mems_list,
|
|
versions_.get(), &mutex_, tmp_file_meta,
|
|
&job_context->memtables_to_free, directories_.GetDbDir(), log_buffer);
|
|
}
|
|
|
|
if (s.ok()) {
|
|
assert(num_cfs ==
|
|
static_cast<int>(job_context->superversion_contexts.size()));
|
|
for (int i = 0; i != num_cfs; ++i) {
|
|
assert(cfds[i]);
|
|
|
|
if (cfds[i]->IsDropped()) {
|
|
continue;
|
|
}
|
|
InstallSuperVersionAndScheduleWork(cfds[i],
|
|
&job_context->superversion_contexts[i],
|
|
all_mutable_cf_options[i]);
|
|
|
|
const std::string& column_family_name = cfds[i]->GetName();
|
|
|
|
Version* const current = cfds[i]->current();
|
|
assert(current);
|
|
|
|
const VersionStorageInfo* const storage_info = current->storage_info();
|
|
assert(storage_info);
|
|
|
|
VersionStorageInfo::LevelSummaryStorage tmp;
|
|
ROCKS_LOG_BUFFER(log_buffer, "[%s] Level summary: %s\n",
|
|
column_family_name.c_str(),
|
|
storage_info->LevelSummary(&tmp));
|
|
|
|
const auto& blob_files = storage_info->GetBlobFiles();
|
|
if (!blob_files.empty()) {
|
|
ROCKS_LOG_BUFFER(log_buffer,
|
|
"[%s] Blob file summary: head=%" PRIu64
|
|
", tail=%" PRIu64 "\n",
|
|
column_family_name.c_str(), blob_files.begin()->first,
|
|
blob_files.rbegin()->first);
|
|
}
|
|
}
|
|
if (made_progress) {
|
|
*made_progress = true;
|
|
}
|
|
#ifndef ROCKSDB_LITE
|
|
auto sfm = static_cast<SstFileManagerImpl*>(
|
|
immutable_db_options_.sst_file_manager.get());
|
|
assert(all_mutable_cf_options.size() == static_cast<size_t>(num_cfs));
|
|
for (int i = 0; i != num_cfs; ++i) {
|
|
if (cfds[i]->IsDropped()) {
|
|
continue;
|
|
}
|
|
NotifyOnFlushCompleted(cfds[i], all_mutable_cf_options[i],
|
|
jobs[i]->GetCommittedFlushJobsInfo());
|
|
if (sfm) {
|
|
std::string file_path = MakeTableFileName(
|
|
cfds[i]->ioptions()->cf_paths[0].path, file_meta[i].fd.GetNumber());
|
|
sfm->OnAddFile(file_path);
|
|
if (sfm->IsMaxAllowedSpaceReached() &&
|
|
error_handler_.GetBGError().ok()) {
|
|
Status new_bg_error =
|
|
Status::SpaceLimit("Max allowed space was reached");
|
|
error_handler_.SetBGError(new_bg_error,
|
|
BackgroundErrorReason::kFlush);
|
|
}
|
|
}
|
|
}
|
|
#endif // ROCKSDB_LITE
|
|
}
|
|
|
|
// Need to undo atomic flush if something went wrong, i.e. s is not OK and
|
|
// it is not because of CF drop.
|
|
if (!s.ok() && !s.IsColumnFamilyDropped()) {
|
|
if (!io_s.ok() && !io_s.IsColumnFamilyDropped()) {
|
|
// Error while writing to MANIFEST.
|
|
// In fact, versions_->io_status() can also be the result of renaming
|
|
// CURRENT file. With current code, it's just difficult to tell. So just
|
|
// be pessimistic and try write to a new MANIFEST.
|
|
// TODO: distinguish between MANIFEST write and CURRENT renaming
|
|
if (!versions_->io_status().ok()) {
|
|
error_handler_.SetBGError(io_s, BackgroundErrorReason::kManifestWrite);
|
|
} else if (total_log_size_ > 0) {
|
|
error_handler_.SetBGError(io_s, BackgroundErrorReason::kFlush);
|
|
} else {
|
|
// If the WAL is empty, we use different error reason
|
|
error_handler_.SetBGError(io_s, BackgroundErrorReason::kFlushNoWAL);
|
|
}
|
|
} else {
|
|
Status new_bg_error = s;
|
|
error_handler_.SetBGError(new_bg_error, BackgroundErrorReason::kFlush);
|
|
}
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
void DBImpl::NotifyOnFlushBegin(ColumnFamilyData* cfd, FileMetaData* file_meta,
|
|
const MutableCFOptions& mutable_cf_options,
|
|
int job_id) {
|
|
#ifndef ROCKSDB_LITE
|
|
if (immutable_db_options_.listeners.size() == 0U) {
|
|
return;
|
|
}
|
|
mutex_.AssertHeld();
|
|
if (shutting_down_.load(std::memory_order_acquire)) {
|
|
return;
|
|
}
|
|
bool triggered_writes_slowdown =
|
|
(cfd->current()->storage_info()->NumLevelFiles(0) >=
|
|
mutable_cf_options.level0_slowdown_writes_trigger);
|
|
bool triggered_writes_stop =
|
|
(cfd->current()->storage_info()->NumLevelFiles(0) >=
|
|
mutable_cf_options.level0_stop_writes_trigger);
|
|
// release lock while notifying events
|
|
mutex_.Unlock();
|
|
{
|
|
FlushJobInfo info{};
|
|
info.cf_id = cfd->GetID();
|
|
info.cf_name = cfd->GetName();
|
|
// TODO(yhchiang): make db_paths dynamic in case flush does not
|
|
// go to L0 in the future.
|
|
const uint64_t file_number = file_meta->fd.GetNumber();
|
|
info.file_path =
|
|
MakeTableFileName(cfd->ioptions()->cf_paths[0].path, file_number);
|
|
info.file_number = file_number;
|
|
info.thread_id = env_->GetThreadID();
|
|
info.job_id = job_id;
|
|
info.triggered_writes_slowdown = triggered_writes_slowdown;
|
|
info.triggered_writes_stop = triggered_writes_stop;
|
|
info.smallest_seqno = file_meta->fd.smallest_seqno;
|
|
info.largest_seqno = file_meta->fd.largest_seqno;
|
|
info.flush_reason = cfd->GetFlushReason();
|
|
for (auto listener : immutable_db_options_.listeners) {
|
|
listener->OnFlushBegin(this, info);
|
|
}
|
|
}
|
|
mutex_.Lock();
|
|
// no need to signal bg_cv_ as it will be signaled at the end of the
|
|
// flush process.
|
|
#else
|
|
(void)cfd;
|
|
(void)file_meta;
|
|
(void)mutable_cf_options;
|
|
(void)job_id;
|
|
#endif // ROCKSDB_LITE
|
|
}
|
|
|
|
void DBImpl::NotifyOnFlushCompleted(
|
|
ColumnFamilyData* cfd, const MutableCFOptions& mutable_cf_options,
|
|
std::list<std::unique_ptr<FlushJobInfo>>* flush_jobs_info) {
|
|
#ifndef ROCKSDB_LITE
|
|
assert(flush_jobs_info != nullptr);
|
|
if (immutable_db_options_.listeners.size() == 0U) {
|
|
return;
|
|
}
|
|
mutex_.AssertHeld();
|
|
if (shutting_down_.load(std::memory_order_acquire)) {
|
|
return;
|
|
}
|
|
bool triggered_writes_slowdown =
|
|
(cfd->current()->storage_info()->NumLevelFiles(0) >=
|
|
mutable_cf_options.level0_slowdown_writes_trigger);
|
|
bool triggered_writes_stop =
|
|
(cfd->current()->storage_info()->NumLevelFiles(0) >=
|
|
mutable_cf_options.level0_stop_writes_trigger);
|
|
// release lock while notifying events
|
|
mutex_.Unlock();
|
|
{
|
|
for (auto& info : *flush_jobs_info) {
|
|
info->triggered_writes_slowdown = triggered_writes_slowdown;
|
|
info->triggered_writes_stop = triggered_writes_stop;
|
|
for (auto listener : immutable_db_options_.listeners) {
|
|
listener->OnFlushCompleted(this, *info);
|
|
}
|
|
}
|
|
flush_jobs_info->clear();
|
|
}
|
|
mutex_.Lock();
|
|
// no need to signal bg_cv_ as it will be signaled at the end of the
|
|
// flush process.
|
|
#else
|
|
(void)cfd;
|
|
(void)mutable_cf_options;
|
|
(void)flush_jobs_info;
|
|
#endif // ROCKSDB_LITE
|
|
}
|
|
|
|
Status DBImpl::CompactRange(const CompactRangeOptions& options,
|
|
ColumnFamilyHandle* column_family,
|
|
const Slice* begin, const Slice* end) {
|
|
auto cfh = static_cast_with_check<ColumnFamilyHandleImpl>(column_family);
|
|
auto cfd = cfh->cfd();
|
|
|
|
if (options.target_path_id >= cfd->ioptions()->cf_paths.size()) {
|
|
return Status::InvalidArgument("Invalid target path ID");
|
|
}
|
|
|
|
bool flush_needed = true;
|
|
if (begin != nullptr && end != nullptr) {
|
|
// TODO(ajkr): We could also optimize away the flush in certain cases where
|
|
// one/both sides of the interval are unbounded. But it requires more
|
|
// changes to RangesOverlapWithMemtables.
|
|
Range range(*begin, *end);
|
|
SuperVersion* super_version = cfd->GetReferencedSuperVersion(this);
|
|
cfd->RangesOverlapWithMemtables({range}, super_version, &flush_needed);
|
|
CleanupSuperVersion(super_version);
|
|
}
|
|
|
|
Status s;
|
|
if (flush_needed) {
|
|
FlushOptions fo;
|
|
fo.allow_write_stall = options.allow_write_stall;
|
|
if (immutable_db_options_.atomic_flush) {
|
|
autovector<ColumnFamilyData*> cfds;
|
|
mutex_.Lock();
|
|
SelectColumnFamiliesForAtomicFlush(&cfds);
|
|
mutex_.Unlock();
|
|
s = AtomicFlushMemTables(cfds, fo, FlushReason::kManualCompaction,
|
|
false /* writes_stopped */);
|
|
} else {
|
|
s = FlushMemTable(cfd, fo, FlushReason::kManualCompaction,
|
|
false /* writes_stopped*/);
|
|
}
|
|
if (!s.ok()) {
|
|
LogFlush(immutable_db_options_.info_log);
|
|
return s;
|
|
}
|
|
}
|
|
|
|
constexpr int kInvalidLevel = -1;
|
|
int final_output_level = kInvalidLevel;
|
|
bool exclusive = options.exclusive_manual_compaction;
|
|
if (cfd->ioptions()->compaction_style == kCompactionStyleUniversal &&
|
|
cfd->NumberLevels() > 1) {
|
|
// Always compact all files together.
|
|
final_output_level = cfd->NumberLevels() - 1;
|
|
// if bottom most level is reserved
|
|
if (immutable_db_options_.allow_ingest_behind) {
|
|
final_output_level--;
|
|
}
|
|
s = RunManualCompaction(cfd, ColumnFamilyData::kCompactAllLevels,
|
|
final_output_level, options, begin, end, exclusive,
|
|
false, port::kMaxUint64);
|
|
} else {
|
|
int first_overlapped_level = kInvalidLevel;
|
|
int max_overlapped_level = kInvalidLevel;
|
|
{
|
|
SuperVersion* super_version = cfd->GetReferencedSuperVersion(this);
|
|
Version* current_version = super_version->current;
|
|
ReadOptions ro;
|
|
ro.total_order_seek = true;
|
|
bool overlap;
|
|
for (int level = 0;
|
|
level < current_version->storage_info()->num_non_empty_levels();
|
|
level++) {
|
|
overlap = true;
|
|
if (begin != nullptr && end != nullptr) {
|
|
Status status = current_version->OverlapWithLevelIterator(
|
|
ro, file_options_, *begin, *end, level, &overlap);
|
|
if (!status.ok()) {
|
|
overlap = current_version->storage_info()->OverlapInLevel(
|
|
level, begin, end);
|
|
}
|
|
} else {
|
|
overlap = current_version->storage_info()->OverlapInLevel(level,
|
|
begin, end);
|
|
}
|
|
if (overlap) {
|
|
if (first_overlapped_level == kInvalidLevel) {
|
|
first_overlapped_level = level;
|
|
}
|
|
max_overlapped_level = level;
|
|
}
|
|
}
|
|
CleanupSuperVersion(super_version);
|
|
}
|
|
if (s.ok() && first_overlapped_level != kInvalidLevel) {
|
|
// max_file_num_to_ignore can be used to filter out newly created SST
|
|
// files, useful for bottom level compaction in a manual compaction
|
|
uint64_t max_file_num_to_ignore = port::kMaxUint64;
|
|
uint64_t next_file_number = versions_->current_next_file_number();
|
|
final_output_level = max_overlapped_level;
|
|
int output_level;
|
|
for (int level = first_overlapped_level; level <= max_overlapped_level;
|
|
level++) {
|
|
// in case the compaction is universal or if we're compacting the
|
|
// bottom-most level, the output level will be the same as input one.
|
|
// level 0 can never be the bottommost level (i.e. if all files are in
|
|
// level 0, we will compact to level 1)
|
|
if (cfd->ioptions()->compaction_style == kCompactionStyleUniversal ||
|
|
cfd->ioptions()->compaction_style == kCompactionStyleFIFO) {
|
|
output_level = level;
|
|
} else if (level == max_overlapped_level && level > 0) {
|
|
if (options.bottommost_level_compaction ==
|
|
BottommostLevelCompaction::kSkip) {
|
|
// Skip bottommost level compaction
|
|
continue;
|
|
} else if (options.bottommost_level_compaction ==
|
|
BottommostLevelCompaction::kIfHaveCompactionFilter &&
|
|
cfd->ioptions()->compaction_filter == nullptr &&
|
|
cfd->ioptions()->compaction_filter_factory == nullptr) {
|
|
// Skip bottommost level compaction since we don't have a compaction
|
|
// filter
|
|
continue;
|
|
}
|
|
output_level = level;
|
|
// update max_file_num_to_ignore only for bottom level compaction
|
|
// because data in newly compacted files in middle levels may still
|
|
// need to be pushed down
|
|
max_file_num_to_ignore = next_file_number;
|
|
} else {
|
|
output_level = level + 1;
|
|
if (cfd->ioptions()->compaction_style == kCompactionStyleLevel &&
|
|
cfd->ioptions()->level_compaction_dynamic_level_bytes &&
|
|
level == 0) {
|
|
output_level = ColumnFamilyData::kCompactToBaseLevel;
|
|
}
|
|
}
|
|
s = RunManualCompaction(cfd, level, output_level, options, begin, end,
|
|
exclusive, false, max_file_num_to_ignore);
|
|
if (!s.ok()) {
|
|
break;
|
|
}
|
|
if (output_level == ColumnFamilyData::kCompactToBaseLevel) {
|
|
final_output_level = cfd->NumberLevels() - 1;
|
|
} else if (output_level > final_output_level) {
|
|
final_output_level = output_level;
|
|
}
|
|
TEST_SYNC_POINT("DBImpl::RunManualCompaction()::1");
|
|
TEST_SYNC_POINT("DBImpl::RunManualCompaction()::2");
|
|
}
|
|
}
|
|
}
|
|
if (!s.ok() || final_output_level == kInvalidLevel) {
|
|
LogFlush(immutable_db_options_.info_log);
|
|
return s;
|
|
}
|
|
|
|
if (options.change_level) {
|
|
TEST_SYNC_POINT("DBImpl::CompactRange:BeforeRefit:1");
|
|
TEST_SYNC_POINT("DBImpl::CompactRange:BeforeRefit:2");
|
|
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"[RefitLevel] waiting for background threads to stop");
|
|
DisableManualCompaction();
|
|
s = PauseBackgroundWork();
|
|
if (s.ok()) {
|
|
TEST_SYNC_POINT("DBImpl::CompactRange:PreRefitLevel");
|
|
s = ReFitLevel(cfd, final_output_level, options.target_level);
|
|
TEST_SYNC_POINT("DBImpl::CompactRange:PostRefitLevel");
|
|
// ContinueBackgroundWork always return Status::OK().
|
|
assert(ContinueBackgroundWork().ok());
|
|
}
|
|
EnableManualCompaction();
|
|
}
|
|
LogFlush(immutable_db_options_.info_log);
|
|
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
// an automatic compaction that has been scheduled might have been
|
|
// preempted by the manual compactions. Need to schedule it back.
|
|
MaybeScheduleFlushOrCompaction();
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
Status DBImpl::CompactFiles(const CompactionOptions& compact_options,
|
|
ColumnFamilyHandle* column_family,
|
|
const std::vector<std::string>& input_file_names,
|
|
const int output_level, const int output_path_id,
|
|
std::vector<std::string>* const output_file_names,
|
|
CompactionJobInfo* compaction_job_info) {
|
|
#ifdef ROCKSDB_LITE
|
|
(void)compact_options;
|
|
(void)column_family;
|
|
(void)input_file_names;
|
|
(void)output_level;
|
|
(void)output_path_id;
|
|
(void)output_file_names;
|
|
(void)compaction_job_info;
|
|
// not supported in lite version
|
|
return Status::NotSupported("Not supported in ROCKSDB LITE");
|
|
#else
|
|
if (column_family == nullptr) {
|
|
return Status::InvalidArgument("ColumnFamilyHandle must be non-null.");
|
|
}
|
|
|
|
auto cfd =
|
|
static_cast_with_check<ColumnFamilyHandleImpl>(column_family)->cfd();
|
|
assert(cfd);
|
|
|
|
Status s;
|
|
JobContext job_context(0, true);
|
|
LogBuffer log_buffer(InfoLogLevel::INFO_LEVEL,
|
|
immutable_db_options_.info_log.get());
|
|
|
|
// Perform CompactFiles
|
|
TEST_SYNC_POINT("TestCompactFiles::IngestExternalFile2");
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
|
|
// This call will unlock/lock the mutex to wait for current running
|
|
// IngestExternalFile() calls to finish.
|
|
WaitForIngestFile();
|
|
|
|
// We need to get current after `WaitForIngestFile`, because
|
|
// `IngestExternalFile` may add files that overlap with `input_file_names`
|
|
auto* current = cfd->current();
|
|
current->Ref();
|
|
|
|
s = CompactFilesImpl(compact_options, cfd, current, input_file_names,
|
|
output_file_names, output_level, output_path_id,
|
|
&job_context, &log_buffer, compaction_job_info);
|
|
|
|
current->Unref();
|
|
}
|
|
|
|
// Find and delete obsolete files
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
// If !s.ok(), this means that Compaction failed. In that case, we want
|
|
// to delete all obsolete files we might have created and we force
|
|
// FindObsoleteFiles(). This is because job_context does not
|
|
// catch all created files if compaction failed.
|
|
FindObsoleteFiles(&job_context, !s.ok());
|
|
} // release the mutex
|
|
|
|
// delete unnecessary files if any, this is done outside the mutex
|
|
if (job_context.HaveSomethingToClean() ||
|
|
job_context.HaveSomethingToDelete() || !log_buffer.IsEmpty()) {
|
|
// Have to flush the info logs before bg_compaction_scheduled_--
|
|
// because if bg_flush_scheduled_ becomes 0 and the lock is
|
|
// released, the deconstructor of DB can kick in and destroy all the
|
|
// states of DB so info_log might not be available after that point.
|
|
// It also applies to access other states that DB owns.
|
|
log_buffer.FlushBufferToLog();
|
|
if (job_context.HaveSomethingToDelete()) {
|
|
// no mutex is locked here. No need to Unlock() and Lock() here.
|
|
PurgeObsoleteFiles(job_context);
|
|
}
|
|
job_context.Clean();
|
|
}
|
|
|
|
return s;
|
|
#endif // ROCKSDB_LITE
|
|
}
|
|
|
|
#ifndef ROCKSDB_LITE
|
|
Status DBImpl::CompactFilesImpl(
|
|
const CompactionOptions& compact_options, ColumnFamilyData* cfd,
|
|
Version* version, const std::vector<std::string>& input_file_names,
|
|
std::vector<std::string>* const output_file_names, const int output_level,
|
|
int output_path_id, JobContext* job_context, LogBuffer* log_buffer,
|
|
CompactionJobInfo* compaction_job_info) {
|
|
mutex_.AssertHeld();
|
|
|
|
if (shutting_down_.load(std::memory_order_acquire)) {
|
|
return Status::ShutdownInProgress();
|
|
}
|
|
if (manual_compaction_paused_.load(std::memory_order_acquire) > 0) {
|
|
return Status::Incomplete(Status::SubCode::kManualCompactionPaused);
|
|
}
|
|
|
|
std::unordered_set<uint64_t> input_set;
|
|
for (const auto& file_name : input_file_names) {
|
|
input_set.insert(TableFileNameToNumber(file_name));
|
|
}
|
|
|
|
ColumnFamilyMetaData cf_meta;
|
|
// TODO(yhchiang): can directly use version here if none of the
|
|
// following functions call is pluggable to external developers.
|
|
version->GetColumnFamilyMetaData(&cf_meta);
|
|
|
|
if (output_path_id < 0) {
|
|
if (cfd->ioptions()->cf_paths.size() == 1U) {
|
|
output_path_id = 0;
|
|
} else {
|
|
return Status::NotSupported(
|
|
"Automatic output path selection is not "
|
|
"yet supported in CompactFiles()");
|
|
}
|
|
}
|
|
|
|
Status s = cfd->compaction_picker()->SanitizeCompactionInputFiles(
|
|
&input_set, cf_meta, output_level);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
|
|
std::vector<CompactionInputFiles> input_files;
|
|
s = cfd->compaction_picker()->GetCompactionInputsFromFileNumbers(
|
|
&input_files, &input_set, version->storage_info(), compact_options);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
|
|
for (const auto& inputs : input_files) {
|
|
if (cfd->compaction_picker()->AreFilesInCompaction(inputs.files)) {
|
|
return Status::Aborted(
|
|
"Some of the necessary compaction input "
|
|
"files are already being compacted");
|
|
}
|
|
}
|
|
bool sfm_reserved_compact_space = false;
|
|
// First check if we have enough room to do the compaction
|
|
bool enough_room = EnoughRoomForCompaction(
|
|
cfd, input_files, &sfm_reserved_compact_space, log_buffer);
|
|
|
|
if (!enough_room) {
|
|
// m's vars will get set properly at the end of this function,
|
|
// as long as status == CompactionTooLarge
|
|
return Status::CompactionTooLarge();
|
|
}
|
|
|
|
// At this point, CompactFiles will be run.
|
|
bg_compaction_scheduled_++;
|
|
|
|
std::unique_ptr<Compaction> c;
|
|
assert(cfd->compaction_picker());
|
|
c.reset(cfd->compaction_picker()->CompactFiles(
|
|
compact_options, input_files, output_level, version->storage_info(),
|
|
*cfd->GetLatestMutableCFOptions(), mutable_db_options_, output_path_id));
|
|
// we already sanitized the set of input files and checked for conflicts
|
|
// without releasing the lock, so we're guaranteed a compaction can be formed.
|
|
assert(c != nullptr);
|
|
|
|
c->SetInputVersion(version);
|
|
// deletion compaction currently not allowed in CompactFiles.
|
|
assert(!c->deletion_compaction());
|
|
|
|
std::vector<SequenceNumber> snapshot_seqs;
|
|
SequenceNumber earliest_write_conflict_snapshot;
|
|
SnapshotChecker* snapshot_checker;
|
|
GetSnapshotContext(job_context, &snapshot_seqs,
|
|
&earliest_write_conflict_snapshot, &snapshot_checker);
|
|
|
|
std::unique_ptr<std::list<uint64_t>::iterator> pending_outputs_inserted_elem(
|
|
new std::list<uint64_t>::iterator(
|
|
CaptureCurrentFileNumberInPendingOutputs()));
|
|
|
|
assert(is_snapshot_supported_ || snapshots_.empty());
|
|
CompactionJobStats compaction_job_stats;
|
|
CompactionJob compaction_job(
|
|
job_context->job_id, c.get(), immutable_db_options_,
|
|
file_options_for_compaction_, versions_.get(), &shutting_down_,
|
|
preserve_deletes_seqnum_.load(), log_buffer, directories_.GetDbDir(),
|
|
GetDataDir(c->column_family_data(), c->output_path_id()), stats_, &mutex_,
|
|
&error_handler_, snapshot_seqs, earliest_write_conflict_snapshot,
|
|
snapshot_checker, table_cache_, &event_logger_,
|
|
c->mutable_cf_options()->paranoid_file_checks,
|
|
c->mutable_cf_options()->report_bg_io_stats, dbname_,
|
|
&compaction_job_stats, Env::Priority::USER, io_tracer_,
|
|
&manual_compaction_paused_, db_id_, db_session_id_);
|
|
|
|
// Creating a compaction influences the compaction score because the score
|
|
// takes running compactions into account (by skipping files that are already
|
|
// being compacted). Since we just changed compaction score, we recalculate it
|
|
// here.
|
|
version->storage_info()->ComputeCompactionScore(*cfd->ioptions(),
|
|
*c->mutable_cf_options());
|
|
|
|
compaction_job.Prepare();
|
|
|
|
mutex_.Unlock();
|
|
TEST_SYNC_POINT("CompactFilesImpl:0");
|
|
TEST_SYNC_POINT("CompactFilesImpl:1");
|
|
compaction_job.Run();
|
|
TEST_SYNC_POINT("CompactFilesImpl:2");
|
|
TEST_SYNC_POINT("CompactFilesImpl:3");
|
|
mutex_.Lock();
|
|
|
|
Status status = compaction_job.Install(*c->mutable_cf_options());
|
|
if (status.ok()) {
|
|
InstallSuperVersionAndScheduleWork(c->column_family_data(),
|
|
&job_context->superversion_contexts[0],
|
|
*c->mutable_cf_options());
|
|
}
|
|
c->ReleaseCompactionFiles(s);
|
|
#ifndef ROCKSDB_LITE
|
|
// Need to make sure SstFileManager does its bookkeeping
|
|
auto sfm = static_cast<SstFileManagerImpl*>(
|
|
immutable_db_options_.sst_file_manager.get());
|
|
if (sfm && sfm_reserved_compact_space) {
|
|
sfm->OnCompactionCompletion(c.get());
|
|
}
|
|
#endif // ROCKSDB_LITE
|
|
|
|
ReleaseFileNumberFromPendingOutputs(pending_outputs_inserted_elem);
|
|
|
|
if (compaction_job_info != nullptr) {
|
|
BuildCompactionJobInfo(cfd, c.get(), s, compaction_job_stats,
|
|
job_context->job_id, version, compaction_job_info);
|
|
}
|
|
|
|
if (status.ok()) {
|
|
// Done
|
|
} else if (status.IsColumnFamilyDropped() || status.IsShutdownInProgress()) {
|
|
// Ignore compaction errors found during shutting down
|
|
} else if (status.IsManualCompactionPaused()) {
|
|
// Don't report stopping manual compaction as error
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"[%s] [JOB %d] Stopping manual compaction",
|
|
c->column_family_data()->GetName().c_str(),
|
|
job_context->job_id);
|
|
} else {
|
|
ROCKS_LOG_WARN(immutable_db_options_.info_log,
|
|
"[%s] [JOB %d] Compaction error: %s",
|
|
c->column_family_data()->GetName().c_str(),
|
|
job_context->job_id, status.ToString().c_str());
|
|
IOStatus io_s = compaction_job.io_status();
|
|
if (!io_s.ok()) {
|
|
error_handler_.SetBGError(io_s, BackgroundErrorReason::kCompaction);
|
|
} else {
|
|
error_handler_.SetBGError(status, BackgroundErrorReason::kCompaction);
|
|
}
|
|
}
|
|
|
|
if (output_file_names != nullptr) {
|
|
for (const auto& newf : c->edit()->GetNewFiles()) {
|
|
(*output_file_names)
|
|
.push_back(TableFileName(c->immutable_cf_options()->cf_paths,
|
|
newf.second.fd.GetNumber(),
|
|
newf.second.fd.GetPathId()));
|
|
}
|
|
}
|
|
|
|
c.reset();
|
|
|
|
bg_compaction_scheduled_--;
|
|
if (bg_compaction_scheduled_ == 0) {
|
|
bg_cv_.SignalAll();
|
|
}
|
|
MaybeScheduleFlushOrCompaction();
|
|
TEST_SYNC_POINT("CompactFilesImpl:End");
|
|
|
|
return status;
|
|
}
|
|
#endif // ROCKSDB_LITE
|
|
|
|
Status DBImpl::PauseBackgroundWork() {
|
|
InstrumentedMutexLock guard_lock(&mutex_);
|
|
bg_compaction_paused_++;
|
|
while (bg_bottom_compaction_scheduled_ > 0 || bg_compaction_scheduled_ > 0 ||
|
|
bg_flush_scheduled_ > 0) {
|
|
bg_cv_.Wait();
|
|
}
|
|
bg_work_paused_++;
|
|
return Status::OK();
|
|
}
|
|
|
|
Status DBImpl::ContinueBackgroundWork() {
|
|
InstrumentedMutexLock guard_lock(&mutex_);
|
|
if (bg_work_paused_ == 0) {
|
|
return Status::InvalidArgument();
|
|
}
|
|
assert(bg_work_paused_ > 0);
|
|
assert(bg_compaction_paused_ > 0);
|
|
bg_compaction_paused_--;
|
|
bg_work_paused_--;
|
|
// It's sufficient to check just bg_work_paused_ here since
|
|
// bg_work_paused_ is always no greater than bg_compaction_paused_
|
|
if (bg_work_paused_ == 0) {
|
|
MaybeScheduleFlushOrCompaction();
|
|
}
|
|
return Status::OK();
|
|
}
|
|
|
|
void DBImpl::NotifyOnCompactionBegin(ColumnFamilyData* cfd, Compaction* c,
|
|
const Status& st,
|
|
const CompactionJobStats& job_stats,
|
|
int job_id) {
|
|
#ifndef ROCKSDB_LITE
|
|
if (immutable_db_options_.listeners.empty()) {
|
|
return;
|
|
}
|
|
mutex_.AssertHeld();
|
|
if (shutting_down_.load(std::memory_order_acquire)) {
|
|
return;
|
|
}
|
|
if (c->is_manual_compaction() &&
|
|
manual_compaction_paused_.load(std::memory_order_acquire) > 0) {
|
|
return;
|
|
}
|
|
Version* current = cfd->current();
|
|
current->Ref();
|
|
// release lock while notifying events
|
|
mutex_.Unlock();
|
|
TEST_SYNC_POINT("DBImpl::NotifyOnCompactionBegin::UnlockMutex");
|
|
{
|
|
CompactionJobInfo info{};
|
|
BuildCompactionJobInfo(cfd, c, st, job_stats, job_id, current, &info);
|
|
for (auto listener : immutable_db_options_.listeners) {
|
|
listener->OnCompactionBegin(this, info);
|
|
}
|
|
info.status.PermitUncheckedError();
|
|
}
|
|
mutex_.Lock();
|
|
current->Unref();
|
|
#else
|
|
(void)cfd;
|
|
(void)c;
|
|
(void)st;
|
|
(void)job_stats;
|
|
(void)job_id;
|
|
#endif // ROCKSDB_LITE
|
|
}
|
|
|
|
void DBImpl::NotifyOnCompactionCompleted(
|
|
ColumnFamilyData* cfd, Compaction* c, const Status& st,
|
|
const CompactionJobStats& compaction_job_stats, const int job_id) {
|
|
#ifndef ROCKSDB_LITE
|
|
if (immutable_db_options_.listeners.size() == 0U) {
|
|
return;
|
|
}
|
|
mutex_.AssertHeld();
|
|
if (shutting_down_.load(std::memory_order_acquire)) {
|
|
return;
|
|
}
|
|
if (c->is_manual_compaction() &&
|
|
manual_compaction_paused_.load(std::memory_order_acquire) > 0) {
|
|
return;
|
|
}
|
|
Version* current = cfd->current();
|
|
current->Ref();
|
|
// release lock while notifying events
|
|
mutex_.Unlock();
|
|
TEST_SYNC_POINT("DBImpl::NotifyOnCompactionCompleted::UnlockMutex");
|
|
{
|
|
CompactionJobInfo info{};
|
|
BuildCompactionJobInfo(cfd, c, st, compaction_job_stats, job_id, current,
|
|
&info);
|
|
for (auto listener : immutable_db_options_.listeners) {
|
|
listener->OnCompactionCompleted(this, info);
|
|
}
|
|
}
|
|
mutex_.Lock();
|
|
current->Unref();
|
|
// no need to signal bg_cv_ as it will be signaled at the end of the
|
|
// flush process.
|
|
#else
|
|
(void)cfd;
|
|
(void)c;
|
|
(void)st;
|
|
(void)compaction_job_stats;
|
|
(void)job_id;
|
|
#endif // ROCKSDB_LITE
|
|
}
|
|
|
|
// REQUIREMENT: block all background work by calling PauseBackgroundWork()
|
|
// before calling this function
|
|
Status DBImpl::ReFitLevel(ColumnFamilyData* cfd, int level, int target_level) {
|
|
assert(level < cfd->NumberLevels());
|
|
if (target_level >= cfd->NumberLevels()) {
|
|
return Status::InvalidArgument("Target level exceeds number of levels");
|
|
}
|
|
|
|
SuperVersionContext sv_context(/* create_superversion */ true);
|
|
|
|
Status status;
|
|
|
|
InstrumentedMutexLock guard_lock(&mutex_);
|
|
|
|
// only allow one thread refitting
|
|
if (refitting_level_) {
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"[ReFitLevel] another thread is refitting");
|
|
return Status::NotSupported("another thread is refitting");
|
|
}
|
|
refitting_level_ = true;
|
|
|
|
const MutableCFOptions mutable_cf_options = *cfd->GetLatestMutableCFOptions();
|
|
// move to a smaller level
|
|
int to_level = target_level;
|
|
if (target_level < 0) {
|
|
to_level = FindMinimumEmptyLevelFitting(cfd, mutable_cf_options, level);
|
|
}
|
|
|
|
auto* vstorage = cfd->current()->storage_info();
|
|
if (to_level != level) {
|
|
if (to_level > level) {
|
|
if (level == 0) {
|
|
return Status::NotSupported(
|
|
"Cannot change from level 0 to other levels.");
|
|
}
|
|
// Check levels are empty for a trivial move
|
|
for (int l = level + 1; l <= to_level; l++) {
|
|
if (vstorage->NumLevelFiles(l) > 0) {
|
|
return Status::NotSupported(
|
|
"Levels between source and target are not empty for a move.");
|
|
}
|
|
}
|
|
} else {
|
|
// to_level < level
|
|
// Check levels are empty for a trivial move
|
|
for (int l = to_level; l < level; l++) {
|
|
if (vstorage->NumLevelFiles(l) > 0) {
|
|
return Status::NotSupported(
|
|
"Levels between source and target are not empty for a move.");
|
|
}
|
|
}
|
|
}
|
|
ROCKS_LOG_DEBUG(immutable_db_options_.info_log,
|
|
"[%s] Before refitting:\n%s", cfd->GetName().c_str(),
|
|
cfd->current()->DebugString().data());
|
|
|
|
VersionEdit edit;
|
|
edit.SetColumnFamily(cfd->GetID());
|
|
for (const auto& f : vstorage->LevelFiles(level)) {
|
|
edit.DeleteFile(level, f->fd.GetNumber());
|
|
edit.AddFile(to_level, f->fd.GetNumber(), f->fd.GetPathId(),
|
|
f->fd.GetFileSize(), f->smallest, f->largest,
|
|
f->fd.smallest_seqno, f->fd.largest_seqno,
|
|
f->marked_for_compaction, f->oldest_blob_file_number,
|
|
f->oldest_ancester_time, f->file_creation_time,
|
|
f->file_checksum, f->file_checksum_func_name);
|
|
}
|
|
ROCKS_LOG_DEBUG(immutable_db_options_.info_log,
|
|
"[%s] Apply version edit:\n%s", cfd->GetName().c_str(),
|
|
edit.DebugString().data());
|
|
|
|
status = versions_->LogAndApply(cfd, mutable_cf_options, &edit, &mutex_,
|
|
directories_.GetDbDir());
|
|
InstallSuperVersionAndScheduleWork(cfd, &sv_context, mutable_cf_options);
|
|
|
|
ROCKS_LOG_DEBUG(immutable_db_options_.info_log, "[%s] LogAndApply: %s\n",
|
|
cfd->GetName().c_str(), status.ToString().data());
|
|
|
|
if (status.ok()) {
|
|
ROCKS_LOG_DEBUG(immutable_db_options_.info_log,
|
|
"[%s] After refitting:\n%s", cfd->GetName().c_str(),
|
|
cfd->current()->DebugString().data());
|
|
}
|
|
}
|
|
|
|
sv_context.Clean();
|
|
refitting_level_ = false;
|
|
|
|
return status;
|
|
}
|
|
|
|
int DBImpl::NumberLevels(ColumnFamilyHandle* column_family) {
|
|
auto cfh = static_cast_with_check<ColumnFamilyHandleImpl>(column_family);
|
|
return cfh->cfd()->NumberLevels();
|
|
}
|
|
|
|
int DBImpl::MaxMemCompactionLevel(ColumnFamilyHandle* /*column_family*/) {
|
|
return 0;
|
|
}
|
|
|
|
int DBImpl::Level0StopWriteTrigger(ColumnFamilyHandle* column_family) {
|
|
auto cfh = static_cast_with_check<ColumnFamilyHandleImpl>(column_family);
|
|
InstrumentedMutexLock l(&mutex_);
|
|
return cfh->cfd()
|
|
->GetSuperVersion()
|
|
->mutable_cf_options.level0_stop_writes_trigger;
|
|
}
|
|
|
|
Status DBImpl::Flush(const FlushOptions& flush_options,
|
|
ColumnFamilyHandle* column_family) {
|
|
auto cfh = static_cast_with_check<ColumnFamilyHandleImpl>(column_family);
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log, "[%s] Manual flush start.",
|
|
cfh->GetName().c_str());
|
|
Status s;
|
|
if (immutable_db_options_.atomic_flush) {
|
|
s = AtomicFlushMemTables({cfh->cfd()}, flush_options,
|
|
FlushReason::kManualFlush);
|
|
} else {
|
|
s = FlushMemTable(cfh->cfd(), flush_options, FlushReason::kManualFlush);
|
|
}
|
|
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"[%s] Manual flush finished, status: %s\n",
|
|
cfh->GetName().c_str(), s.ToString().c_str());
|
|
return s;
|
|
}
|
|
|
|
Status DBImpl::Flush(const FlushOptions& flush_options,
|
|
const std::vector<ColumnFamilyHandle*>& column_families) {
|
|
Status s;
|
|
if (!immutable_db_options_.atomic_flush) {
|
|
for (auto cfh : column_families) {
|
|
s = Flush(flush_options, cfh);
|
|
if (!s.ok()) {
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"Manual atomic flush start.\n"
|
|
"=====Column families:=====");
|
|
for (auto cfh : column_families) {
|
|
auto cfhi = static_cast<ColumnFamilyHandleImpl*>(cfh);
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log, "%s",
|
|
cfhi->GetName().c_str());
|
|
}
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"=====End of column families list=====");
|
|
autovector<ColumnFamilyData*> cfds;
|
|
std::for_each(column_families.begin(), column_families.end(),
|
|
[&cfds](ColumnFamilyHandle* elem) {
|
|
auto cfh = static_cast<ColumnFamilyHandleImpl*>(elem);
|
|
cfds.emplace_back(cfh->cfd());
|
|
});
|
|
s = AtomicFlushMemTables(cfds, flush_options, FlushReason::kManualFlush);
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"Manual atomic flush finished, status: %s\n"
|
|
"=====Column families:=====",
|
|
s.ToString().c_str());
|
|
for (auto cfh : column_families) {
|
|
auto cfhi = static_cast<ColumnFamilyHandleImpl*>(cfh);
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log, "%s",
|
|
cfhi->GetName().c_str());
|
|
}
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"=====End of column families list=====");
|
|
}
|
|
return s;
|
|
}
|
|
|
|
Status DBImpl::RunManualCompaction(
|
|
ColumnFamilyData* cfd, int input_level, int output_level,
|
|
const CompactRangeOptions& compact_range_options, const Slice* begin,
|
|
const Slice* end, bool exclusive, bool disallow_trivial_move,
|
|
uint64_t max_file_num_to_ignore) {
|
|
assert(input_level == ColumnFamilyData::kCompactAllLevels ||
|
|
input_level >= 0);
|
|
|
|
InternalKey begin_storage, end_storage;
|
|
CompactionArg* ca;
|
|
|
|
bool scheduled = false;
|
|
bool manual_conflict = false;
|
|
ManualCompactionState manual;
|
|
manual.cfd = cfd;
|
|
manual.input_level = input_level;
|
|
manual.output_level = output_level;
|
|
manual.output_path_id = compact_range_options.target_path_id;
|
|
manual.done = false;
|
|
manual.in_progress = false;
|
|
manual.incomplete = false;
|
|
manual.exclusive = exclusive;
|
|
manual.disallow_trivial_move = disallow_trivial_move;
|
|
// For universal compaction, we enforce every manual compaction to compact
|
|
// all files.
|
|
if (begin == nullptr ||
|
|
cfd->ioptions()->compaction_style == kCompactionStyleUniversal ||
|
|
cfd->ioptions()->compaction_style == kCompactionStyleFIFO) {
|
|
manual.begin = nullptr;
|
|
} else {
|
|
begin_storage.SetMinPossibleForUserKey(*begin);
|
|
manual.begin = &begin_storage;
|
|
}
|
|
if (end == nullptr ||
|
|
cfd->ioptions()->compaction_style == kCompactionStyleUniversal ||
|
|
cfd->ioptions()->compaction_style == kCompactionStyleFIFO) {
|
|
manual.end = nullptr;
|
|
} else {
|
|
end_storage.SetMaxPossibleForUserKey(*end);
|
|
manual.end = &end_storage;
|
|
}
|
|
|
|
TEST_SYNC_POINT("DBImpl::RunManualCompaction:0");
|
|
TEST_SYNC_POINT("DBImpl::RunManualCompaction:1");
|
|
InstrumentedMutexLock l(&mutex_);
|
|
|
|
// When a manual compaction arrives, temporarily disable scheduling of
|
|
// non-manual compactions and wait until the number of scheduled compaction
|
|
// jobs drops to zero. This is needed to ensure that this manual compaction
|
|
// can compact any range of keys/files.
|
|
//
|
|
// HasPendingManualCompaction() is true when at least one thread is inside
|
|
// RunManualCompaction(), i.e. during that time no other compaction will
|
|
// get scheduled (see MaybeScheduleFlushOrCompaction).
|
|
//
|
|
// Note that the following loop doesn't stop more that one thread calling
|
|
// RunManualCompaction() from getting to the second while loop below.
|
|
// However, only one of them will actually schedule compaction, while
|
|
// others will wait on a condition variable until it completes.
|
|
|
|
AddManualCompaction(&manual);
|
|
TEST_SYNC_POINT_CALLBACK("DBImpl::RunManualCompaction:NotScheduled", &mutex_);
|
|
if (exclusive) {
|
|
while (bg_bottom_compaction_scheduled_ > 0 ||
|
|
bg_compaction_scheduled_ > 0) {
|
|
TEST_SYNC_POINT("DBImpl::RunManualCompaction:WaitScheduled");
|
|
ROCKS_LOG_INFO(
|
|
immutable_db_options_.info_log,
|
|
"[%s] Manual compaction waiting for all other scheduled background "
|
|
"compactions to finish",
|
|
cfd->GetName().c_str());
|
|
bg_cv_.Wait();
|
|
}
|
|
}
|
|
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"[%s] Manual compaction starting", cfd->GetName().c_str());
|
|
|
|
LogBuffer log_buffer(InfoLogLevel::INFO_LEVEL,
|
|
immutable_db_options_.info_log.get());
|
|
// We don't check bg_error_ here, because if we get the error in compaction,
|
|
// the compaction will set manual.status to bg_error_ and set manual.done to
|
|
// true.
|
|
while (!manual.done) {
|
|
assert(HasPendingManualCompaction());
|
|
manual_conflict = false;
|
|
Compaction* compaction = nullptr;
|
|
if (ShouldntRunManualCompaction(&manual) || (manual.in_progress == true) ||
|
|
scheduled ||
|
|
(((manual.manual_end = &manual.tmp_storage1) != nullptr) &&
|
|
((compaction = manual.cfd->CompactRange(
|
|
*manual.cfd->GetLatestMutableCFOptions(), mutable_db_options_,
|
|
manual.input_level, manual.output_level, compact_range_options,
|
|
manual.begin, manual.end, &manual.manual_end, &manual_conflict,
|
|
max_file_num_to_ignore)) == nullptr &&
|
|
manual_conflict))) {
|
|
// exclusive manual compactions should not see a conflict during
|
|
// CompactRange
|
|
assert(!exclusive || !manual_conflict);
|
|
// Running either this or some other manual compaction
|
|
bg_cv_.Wait();
|
|
if (scheduled && manual.incomplete == true) {
|
|
assert(!manual.in_progress);
|
|
scheduled = false;
|
|
manual.incomplete = false;
|
|
}
|
|
} else if (!scheduled) {
|
|
if (compaction == nullptr) {
|
|
manual.done = true;
|
|
bg_cv_.SignalAll();
|
|
continue;
|
|
}
|
|
ca = new CompactionArg;
|
|
ca->db = this;
|
|
ca->prepicked_compaction = new PrepickedCompaction;
|
|
ca->prepicked_compaction->manual_compaction_state = &manual;
|
|
ca->prepicked_compaction->compaction = compaction;
|
|
if (!RequestCompactionToken(
|
|
cfd, true, &ca->prepicked_compaction->task_token, &log_buffer)) {
|
|
// Don't throttle manual compaction, only count outstanding tasks.
|
|
assert(false);
|
|
}
|
|
manual.incomplete = false;
|
|
bg_compaction_scheduled_++;
|
|
Env::Priority thread_pool_pri = Env::Priority::LOW;
|
|
if (compaction->bottommost_level() &&
|
|
env_->GetBackgroundThreads(Env::Priority::BOTTOM) > 0) {
|
|
thread_pool_pri = Env::Priority::BOTTOM;
|
|
}
|
|
env_->Schedule(&DBImpl::BGWorkCompaction, ca, thread_pool_pri, this,
|
|
&DBImpl::UnscheduleCompactionCallback);
|
|
scheduled = true;
|
|
}
|
|
}
|
|
|
|
log_buffer.FlushBufferToLog();
|
|
assert(!manual.in_progress);
|
|
assert(HasPendingManualCompaction());
|
|
RemoveManualCompaction(&manual);
|
|
bg_cv_.SignalAll();
|
|
return manual.status;
|
|
}
|
|
|
|
void DBImpl::GenerateFlushRequest(const autovector<ColumnFamilyData*>& cfds,
|
|
FlushRequest* req) {
|
|
assert(req != nullptr);
|
|
req->reserve(cfds.size());
|
|
for (const auto cfd : cfds) {
|
|
if (nullptr == cfd) {
|
|
// cfd may be null, see DBImpl::ScheduleFlushes
|
|
continue;
|
|
}
|
|
uint64_t max_memtable_id = cfd->imm()->GetLatestMemTableID();
|
|
req->emplace_back(cfd, max_memtable_id);
|
|
}
|
|
}
|
|
|
|
Status DBImpl::FlushMemTable(ColumnFamilyData* cfd,
|
|
const FlushOptions& flush_options,
|
|
FlushReason flush_reason, bool writes_stopped) {
|
|
Status s;
|
|
uint64_t flush_memtable_id = 0;
|
|
if (!flush_options.allow_write_stall) {
|
|
bool flush_needed = true;
|
|
s = WaitUntilFlushWouldNotStallWrites(cfd, &flush_needed);
|
|
TEST_SYNC_POINT("DBImpl::FlushMemTable:StallWaitDone");
|
|
if (!s.ok() || !flush_needed) {
|
|
return s;
|
|
}
|
|
}
|
|
|
|
FlushRequest flush_req;
|
|
{
|
|
WriteContext context;
|
|
InstrumentedMutexLock guard_lock(&mutex_);
|
|
|
|
WriteThread::Writer w;
|
|
WriteThread::Writer nonmem_w;
|
|
if (!writes_stopped) {
|
|
write_thread_.EnterUnbatched(&w, &mutex_);
|
|
if (two_write_queues_) {
|
|
nonmem_write_thread_.EnterUnbatched(&nonmem_w, &mutex_);
|
|
}
|
|
}
|
|
WaitForPendingWrites();
|
|
|
|
if (!cfd->mem()->IsEmpty() || !cached_recoverable_state_empty_.load()) {
|
|
if (flush_reason != FlushReason::kErrorRecoveryRetryFlush) {
|
|
s = SwitchMemtable(cfd, &context);
|
|
} else {
|
|
assert(cfd->imm()->NumNotFlushed() > 0);
|
|
}
|
|
}
|
|
if (s.ok()) {
|
|
if (cfd->imm()->NumNotFlushed() != 0 || !cfd->mem()->IsEmpty() ||
|
|
!cached_recoverable_state_empty_.load()) {
|
|
flush_memtable_id = cfd->imm()->GetLatestMemTableID();
|
|
flush_req.emplace_back(cfd, flush_memtable_id);
|
|
}
|
|
if (immutable_db_options_.persist_stats_to_disk &&
|
|
flush_reason != FlushReason::kErrorRecoveryRetryFlush) {
|
|
ColumnFamilyData* cfd_stats =
|
|
versions_->GetColumnFamilySet()->GetColumnFamily(
|
|
kPersistentStatsColumnFamilyName);
|
|
if (cfd_stats != nullptr && cfd_stats != cfd &&
|
|
!cfd_stats->mem()->IsEmpty()) {
|
|
// only force flush stats CF when it will be the only CF lagging
|
|
// behind after the current flush
|
|
bool stats_cf_flush_needed = true;
|
|
for (auto* loop_cfd : *versions_->GetColumnFamilySet()) {
|
|
if (loop_cfd == cfd_stats || loop_cfd == cfd) {
|
|
continue;
|
|
}
|
|
if (loop_cfd->GetLogNumber() <= cfd_stats->GetLogNumber()) {
|
|
stats_cf_flush_needed = false;
|
|
}
|
|
}
|
|
if (stats_cf_flush_needed) {
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"Force flushing stats CF with manual flush of %s "
|
|
"to avoid holding old logs",
|
|
cfd->GetName().c_str());
|
|
s = SwitchMemtable(cfd_stats, &context);
|
|
flush_memtable_id = cfd_stats->imm()->GetLatestMemTableID();
|
|
flush_req.emplace_back(cfd_stats, flush_memtable_id);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (s.ok() && !flush_req.empty()) {
|
|
for (auto& elem : flush_req) {
|
|
ColumnFamilyData* loop_cfd = elem.first;
|
|
loop_cfd->imm()->FlushRequested();
|
|
}
|
|
// If the caller wants to wait for this flush to complete, it indicates
|
|
// that the caller expects the ColumnFamilyData not to be free'ed by
|
|
// other threads which may drop the column family concurrently.
|
|
// Therefore, we increase the cfd's ref count.
|
|
if (flush_options.wait) {
|
|
for (auto& elem : flush_req) {
|
|
ColumnFamilyData* loop_cfd = elem.first;
|
|
loop_cfd->Ref();
|
|
}
|
|
}
|
|
SchedulePendingFlush(flush_req, flush_reason);
|
|
MaybeScheduleFlushOrCompaction();
|
|
}
|
|
|
|
if (!writes_stopped) {
|
|
write_thread_.ExitUnbatched(&w);
|
|
if (two_write_queues_) {
|
|
nonmem_write_thread_.ExitUnbatched(&nonmem_w);
|
|
}
|
|
}
|
|
}
|
|
TEST_SYNC_POINT("DBImpl::FlushMemTable:AfterScheduleFlush");
|
|
TEST_SYNC_POINT("DBImpl::FlushMemTable:BeforeWaitForBgFlush");
|
|
if (s.ok() && flush_options.wait) {
|
|
autovector<ColumnFamilyData*> cfds;
|
|
autovector<const uint64_t*> flush_memtable_ids;
|
|
for (auto& iter : flush_req) {
|
|
cfds.push_back(iter.first);
|
|
flush_memtable_ids.push_back(&(iter.second));
|
|
}
|
|
s = WaitForFlushMemTables(
|
|
cfds, flush_memtable_ids,
|
|
(flush_reason == FlushReason::kErrorRecovery ||
|
|
flush_reason == FlushReason::kErrorRecoveryRetryFlush));
|
|
InstrumentedMutexLock lock_guard(&mutex_);
|
|
for (auto* tmp_cfd : cfds) {
|
|
tmp_cfd->UnrefAndTryDelete();
|
|
}
|
|
}
|
|
TEST_SYNC_POINT("DBImpl::FlushMemTable:FlushMemTableFinished");
|
|
return s;
|
|
}
|
|
|
|
// Flush all elements in 'column_family_datas'
|
|
// and atomically record the result to the MANIFEST.
|
|
Status DBImpl::AtomicFlushMemTables(
|
|
const autovector<ColumnFamilyData*>& column_family_datas,
|
|
const FlushOptions& flush_options, FlushReason flush_reason,
|
|
bool writes_stopped) {
|
|
Status s;
|
|
if (!flush_options.allow_write_stall) {
|
|
int num_cfs_to_flush = 0;
|
|
for (auto cfd : column_family_datas) {
|
|
bool flush_needed = true;
|
|
s = WaitUntilFlushWouldNotStallWrites(cfd, &flush_needed);
|
|
if (!s.ok()) {
|
|
return s;
|
|
} else if (flush_needed) {
|
|
++num_cfs_to_flush;
|
|
}
|
|
}
|
|
if (0 == num_cfs_to_flush) {
|
|
return s;
|
|
}
|
|
}
|
|
FlushRequest flush_req;
|
|
autovector<ColumnFamilyData*> cfds;
|
|
{
|
|
WriteContext context;
|
|
InstrumentedMutexLock guard_lock(&mutex_);
|
|
|
|
WriteThread::Writer w;
|
|
WriteThread::Writer nonmem_w;
|
|
if (!writes_stopped) {
|
|
write_thread_.EnterUnbatched(&w, &mutex_);
|
|
if (two_write_queues_) {
|
|
nonmem_write_thread_.EnterUnbatched(&nonmem_w, &mutex_);
|
|
}
|
|
}
|
|
WaitForPendingWrites();
|
|
|
|
for (auto cfd : column_family_datas) {
|
|
if (cfd->IsDropped()) {
|
|
continue;
|
|
}
|
|
if (cfd->imm()->NumNotFlushed() != 0 || !cfd->mem()->IsEmpty() ||
|
|
!cached_recoverable_state_empty_.load()) {
|
|
cfds.emplace_back(cfd);
|
|
}
|
|
}
|
|
for (auto cfd : cfds) {
|
|
if ((cfd->mem()->IsEmpty() && cached_recoverable_state_empty_.load()) ||
|
|
flush_reason == FlushReason::kErrorRecoveryRetryFlush) {
|
|
continue;
|
|
}
|
|
cfd->Ref();
|
|
s = SwitchMemtable(cfd, &context);
|
|
cfd->UnrefAndTryDelete();
|
|
if (!s.ok()) {
|
|
break;
|
|
}
|
|
}
|
|
if (s.ok()) {
|
|
AssignAtomicFlushSeq(cfds);
|
|
for (auto cfd : cfds) {
|
|
cfd->imm()->FlushRequested();
|
|
}
|
|
// If the caller wants to wait for this flush to complete, it indicates
|
|
// that the caller expects the ColumnFamilyData not to be free'ed by
|
|
// other threads which may drop the column family concurrently.
|
|
// Therefore, we increase the cfd's ref count.
|
|
if (flush_options.wait) {
|
|
for (auto cfd : cfds) {
|
|
cfd->Ref();
|
|
}
|
|
}
|
|
GenerateFlushRequest(cfds, &flush_req);
|
|
SchedulePendingFlush(flush_req, flush_reason);
|
|
MaybeScheduleFlushOrCompaction();
|
|
}
|
|
|
|
if (!writes_stopped) {
|
|
write_thread_.ExitUnbatched(&w);
|
|
if (two_write_queues_) {
|
|
nonmem_write_thread_.ExitUnbatched(&nonmem_w);
|
|
}
|
|
}
|
|
}
|
|
TEST_SYNC_POINT("DBImpl::AtomicFlushMemTables:AfterScheduleFlush");
|
|
TEST_SYNC_POINT("DBImpl::AtomicFlushMemTables:BeforeWaitForBgFlush");
|
|
if (s.ok() && flush_options.wait) {
|
|
autovector<const uint64_t*> flush_memtable_ids;
|
|
for (auto& iter : flush_req) {
|
|
flush_memtable_ids.push_back(&(iter.second));
|
|
}
|
|
s = WaitForFlushMemTables(
|
|
cfds, flush_memtable_ids,
|
|
(flush_reason == FlushReason::kErrorRecovery ||
|
|
flush_reason == FlushReason::kErrorRecoveryRetryFlush));
|
|
InstrumentedMutexLock lock_guard(&mutex_);
|
|
for (auto* cfd : cfds) {
|
|
cfd->UnrefAndTryDelete();
|
|
}
|
|
}
|
|
return s;
|
|
}
|
|
|
|
// Calling FlushMemTable(), whether from DB::Flush() or from Backup Engine, can
|
|
// cause write stall, for example if one memtable is being flushed already.
|
|
// This method tries to avoid write stall (similar to CompactRange() behavior)
|
|
// it emulates how the SuperVersion / LSM would change if flush happens, checks
|
|
// it against various constrains and delays flush if it'd cause write stall.
|
|
// Called should check status and flush_needed to see if flush already happened.
|
|
Status DBImpl::WaitUntilFlushWouldNotStallWrites(ColumnFamilyData* cfd,
|
|
bool* flush_needed) {
|
|
{
|
|
*flush_needed = true;
|
|
InstrumentedMutexLock l(&mutex_);
|
|
uint64_t orig_active_memtable_id = cfd->mem()->GetID();
|
|
WriteStallCondition write_stall_condition = WriteStallCondition::kNormal;
|
|
do {
|
|
if (write_stall_condition != WriteStallCondition::kNormal) {
|
|
// Same error handling as user writes: Don't wait if there's a
|
|
// background error, even if it's a soft error. We might wait here
|
|
// indefinitely as the pending flushes/compactions may never finish
|
|
// successfully, resulting in the stall condition lasting indefinitely
|
|
if (error_handler_.IsBGWorkStopped()) {
|
|
return error_handler_.GetBGError();
|
|
}
|
|
|
|
TEST_SYNC_POINT("DBImpl::WaitUntilFlushWouldNotStallWrites:StallWait");
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"[%s] WaitUntilFlushWouldNotStallWrites"
|
|
" waiting on stall conditions to clear",
|
|
cfd->GetName().c_str());
|
|
bg_cv_.Wait();
|
|
}
|
|
if (cfd->IsDropped()) {
|
|
return Status::ColumnFamilyDropped();
|
|
}
|
|
if (shutting_down_.load(std::memory_order_acquire)) {
|
|
return Status::ShutdownInProgress();
|
|
}
|
|
|
|
uint64_t earliest_memtable_id =
|
|
std::min(cfd->mem()->GetID(), cfd->imm()->GetEarliestMemTableID());
|
|
if (earliest_memtable_id > orig_active_memtable_id) {
|
|
// We waited so long that the memtable we were originally waiting on was
|
|
// flushed.
|
|
*flush_needed = false;
|
|
return Status::OK();
|
|
}
|
|
|
|
const auto& mutable_cf_options = *cfd->GetLatestMutableCFOptions();
|
|
const auto* vstorage = cfd->current()->storage_info();
|
|
|
|
// Skip stalling check if we're below auto-flush and auto-compaction
|
|
// triggers. If it stalled in these conditions, that'd mean the stall
|
|
// triggers are so low that stalling is needed for any background work. In
|
|
// that case we shouldn't wait since background work won't be scheduled.
|
|
if (cfd->imm()->NumNotFlushed() <
|
|
cfd->ioptions()->min_write_buffer_number_to_merge &&
|
|
vstorage->l0_delay_trigger_count() <
|
|
mutable_cf_options.level0_file_num_compaction_trigger) {
|
|
break;
|
|
}
|
|
|
|
// check whether one extra immutable memtable or an extra L0 file would
|
|
// cause write stalling mode to be entered. It could still enter stall
|
|
// mode due to pending compaction bytes, but that's less common
|
|
write_stall_condition =
|
|
ColumnFamilyData::GetWriteStallConditionAndCause(
|
|
cfd->imm()->NumNotFlushed() + 1,
|
|
vstorage->l0_delay_trigger_count() + 1,
|
|
vstorage->estimated_compaction_needed_bytes(), mutable_cf_options)
|
|
.first;
|
|
} while (write_stall_condition != WriteStallCondition::kNormal);
|
|
}
|
|
return Status::OK();
|
|
}
|
|
|
|
// Wait for memtables to be flushed for multiple column families.
|
|
// let N = cfds.size()
|
|
// for i in [0, N),
|
|
// 1) if flush_memtable_ids[i] is not null, then the memtables with lower IDs
|
|
// have to be flushed for THIS column family;
|
|
// 2) if flush_memtable_ids[i] is null, then all memtables in THIS column
|
|
// family have to be flushed.
|
|
// Finish waiting when ALL column families finish flushing memtables.
|
|
// resuming_from_bg_err indicates whether the caller is trying to resume from
|
|
// background error or in normal processing.
|
|
Status DBImpl::WaitForFlushMemTables(
|
|
const autovector<ColumnFamilyData*>& cfds,
|
|
const autovector<const uint64_t*>& flush_memtable_ids,
|
|
bool resuming_from_bg_err) {
|
|
int num = static_cast<int>(cfds.size());
|
|
// Wait until the compaction completes
|
|
InstrumentedMutexLock l(&mutex_);
|
|
// If the caller is trying to resume from bg error, then
|
|
// error_handler_.IsDBStopped() is true.
|
|
while (resuming_from_bg_err || !error_handler_.IsDBStopped()) {
|
|
if (shutting_down_.load(std::memory_order_acquire)) {
|
|
return Status::ShutdownInProgress();
|
|
}
|
|
// If an error has occurred during resumption, then no need to wait.
|
|
if (!error_handler_.GetRecoveryError().ok()) {
|
|
break;
|
|
}
|
|
// If BGWorkStopped, which indicate that there is a BG error and
|
|
// 1) soft error but requires no BG work, 2) no in auto_recovery_
|
|
if (!resuming_from_bg_err && error_handler_.IsBGWorkStopped() &&
|
|
error_handler_.GetBGError().severity() < Status::Severity::kHardError) {
|
|
return error_handler_.GetBGError();
|
|
}
|
|
|
|
// Number of column families that have been dropped.
|
|
int num_dropped = 0;
|
|
// Number of column families that have finished flush.
|
|
int num_finished = 0;
|
|
for (int i = 0; i < num; ++i) {
|
|
if (cfds[i]->IsDropped()) {
|
|
++num_dropped;
|
|
} else if (cfds[i]->imm()->NumNotFlushed() == 0 ||
|
|
(flush_memtable_ids[i] != nullptr &&
|
|
cfds[i]->imm()->GetEarliestMemTableID() >
|
|
*flush_memtable_ids[i])) {
|
|
++num_finished;
|
|
}
|
|
}
|
|
if (1 == num_dropped && 1 == num) {
|
|
return Status::ColumnFamilyDropped();
|
|
}
|
|
// Column families involved in this flush request have either been dropped
|
|
// or finished flush. Then it's time to finish waiting.
|
|
if (num_dropped + num_finished == num) {
|
|
break;
|
|
}
|
|
bg_cv_.Wait();
|
|
}
|
|
Status s;
|
|
// If not resuming from bg error, and an error has caused the DB to stop,
|
|
// then report the bg error to caller.
|
|
if (!resuming_from_bg_err && error_handler_.IsDBStopped()) {
|
|
s = error_handler_.GetBGError();
|
|
}
|
|
return s;
|
|
}
|
|
|
|
Status DBImpl::EnableAutoCompaction(
|
|
const std::vector<ColumnFamilyHandle*>& column_family_handles) {
|
|
Status s;
|
|
for (auto cf_ptr : column_family_handles) {
|
|
Status status =
|
|
this->SetOptions(cf_ptr, {{"disable_auto_compactions", "false"}});
|
|
if (!status.ok()) {
|
|
s = status;
|
|
}
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
void DBImpl::DisableManualCompaction() {
|
|
InstrumentedMutexLock l(&mutex_);
|
|
manual_compaction_paused_.fetch_add(1, std::memory_order_release);
|
|
// Wait for any pending manual compactions to finish (typically through
|
|
// failing with `Status::Incomplete`) prior to returning. This way we are
|
|
// guaranteed no pending manual compaction will commit while manual
|
|
// compactions are "disabled".
|
|
while (HasPendingManualCompaction()) {
|
|
bg_cv_.Wait();
|
|
}
|
|
}
|
|
|
|
void DBImpl::EnableManualCompaction() {
|
|
InstrumentedMutexLock l(&mutex_);
|
|
assert(manual_compaction_paused_ > 0);
|
|
manual_compaction_paused_.fetch_sub(1, std::memory_order_release);
|
|
}
|
|
|
|
void DBImpl::MaybeScheduleFlushOrCompaction() {
|
|
mutex_.AssertHeld();
|
|
if (!opened_successfully_) {
|
|
// Compaction may introduce data race to DB open
|
|
return;
|
|
}
|
|
if (bg_work_paused_ > 0) {
|
|
// we paused the background work
|
|
return;
|
|
} else if (error_handler_.IsBGWorkStopped() &&
|
|
!error_handler_.IsRecoveryInProgress()) {
|
|
// There has been a hard error and this call is not part of the recovery
|
|
// sequence. Bail out here so we don't get into an endless loop of
|
|
// scheduling BG work which will again call this function
|
|
return;
|
|
} else if (shutting_down_.load(std::memory_order_acquire)) {
|
|
// DB is being deleted; no more background compactions
|
|
return;
|
|
}
|
|
auto bg_job_limits = GetBGJobLimits();
|
|
bool is_flush_pool_empty =
|
|
env_->GetBackgroundThreads(Env::Priority::HIGH) == 0;
|
|
while (!is_flush_pool_empty && unscheduled_flushes_ > 0 &&
|
|
bg_flush_scheduled_ < bg_job_limits.max_flushes) {
|
|
bg_flush_scheduled_++;
|
|
FlushThreadArg* fta = new FlushThreadArg;
|
|
fta->db_ = this;
|
|
fta->thread_pri_ = Env::Priority::HIGH;
|
|
env_->Schedule(&DBImpl::BGWorkFlush, fta, Env::Priority::HIGH, this,
|
|
&DBImpl::UnscheduleFlushCallback);
|
|
--unscheduled_flushes_;
|
|
TEST_SYNC_POINT_CALLBACK(
|
|
"DBImpl::MaybeScheduleFlushOrCompaction:AfterSchedule:0",
|
|
&unscheduled_flushes_);
|
|
}
|
|
|
|
// special case -- if high-pri (flush) thread pool is empty, then schedule
|
|
// flushes in low-pri (compaction) thread pool.
|
|
if (is_flush_pool_empty) {
|
|
while (unscheduled_flushes_ > 0 &&
|
|
bg_flush_scheduled_ + bg_compaction_scheduled_ <
|
|
bg_job_limits.max_flushes) {
|
|
bg_flush_scheduled_++;
|
|
FlushThreadArg* fta = new FlushThreadArg;
|
|
fta->db_ = this;
|
|
fta->thread_pri_ = Env::Priority::LOW;
|
|
env_->Schedule(&DBImpl::BGWorkFlush, fta, Env::Priority::LOW, this,
|
|
&DBImpl::UnscheduleFlushCallback);
|
|
--unscheduled_flushes_;
|
|
}
|
|
}
|
|
|
|
if (bg_compaction_paused_ > 0) {
|
|
// we paused the background compaction
|
|
return;
|
|
} else if (error_handler_.IsBGWorkStopped()) {
|
|
// Compaction is not part of the recovery sequence from a hard error. We
|
|
// might get here because recovery might do a flush and install a new
|
|
// super version, which will try to schedule pending compactions. Bail
|
|
// out here and let the higher level recovery handle compactions
|
|
return;
|
|
}
|
|
|
|
if (HasExclusiveManualCompaction()) {
|
|
// only manual compactions are allowed to run. don't schedule automatic
|
|
// compactions
|
|
TEST_SYNC_POINT("DBImpl::MaybeScheduleFlushOrCompaction:Conflict");
|
|
return;
|
|
}
|
|
|
|
while (bg_compaction_scheduled_ < bg_job_limits.max_compactions &&
|
|
unscheduled_compactions_ > 0) {
|
|
CompactionArg* ca = new CompactionArg;
|
|
ca->db = this;
|
|
ca->prepicked_compaction = nullptr;
|
|
bg_compaction_scheduled_++;
|
|
unscheduled_compactions_--;
|
|
env_->Schedule(&DBImpl::BGWorkCompaction, ca, Env::Priority::LOW, this,
|
|
&DBImpl::UnscheduleCompactionCallback);
|
|
}
|
|
}
|
|
|
|
DBImpl::BGJobLimits DBImpl::GetBGJobLimits() const {
|
|
mutex_.AssertHeld();
|
|
return GetBGJobLimits(mutable_db_options_.max_background_flushes,
|
|
mutable_db_options_.max_background_compactions,
|
|
mutable_db_options_.max_background_jobs,
|
|
write_controller_.NeedSpeedupCompaction());
|
|
}
|
|
|
|
DBImpl::BGJobLimits DBImpl::GetBGJobLimits(int max_background_flushes,
|
|
int max_background_compactions,
|
|
int max_background_jobs,
|
|
bool parallelize_compactions) {
|
|
BGJobLimits res;
|
|
if (max_background_flushes == -1 && max_background_compactions == -1) {
|
|
// for our first stab implementing max_background_jobs, simply allocate a
|
|
// quarter of the threads to flushes.
|
|
res.max_flushes = std::max(1, max_background_jobs / 4);
|
|
res.max_compactions = std::max(1, max_background_jobs - res.max_flushes);
|
|
} else {
|
|
// compatibility code in case users haven't migrated to max_background_jobs,
|
|
// which automatically computes flush/compaction limits
|
|
res.max_flushes = std::max(1, max_background_flushes);
|
|
res.max_compactions = std::max(1, max_background_compactions);
|
|
}
|
|
if (!parallelize_compactions) {
|
|
// throttle background compactions until we deem necessary
|
|
res.max_compactions = 1;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
void DBImpl::AddToCompactionQueue(ColumnFamilyData* cfd) {
|
|
assert(!cfd->queued_for_compaction());
|
|
cfd->Ref();
|
|
compaction_queue_.push_back(cfd);
|
|
cfd->set_queued_for_compaction(true);
|
|
}
|
|
|
|
ColumnFamilyData* DBImpl::PopFirstFromCompactionQueue() {
|
|
assert(!compaction_queue_.empty());
|
|
auto cfd = *compaction_queue_.begin();
|
|
compaction_queue_.pop_front();
|
|
assert(cfd->queued_for_compaction());
|
|
cfd->set_queued_for_compaction(false);
|
|
return cfd;
|
|
}
|
|
|
|
DBImpl::FlushRequest DBImpl::PopFirstFromFlushQueue() {
|
|
assert(!flush_queue_.empty());
|
|
FlushRequest flush_req = flush_queue_.front();
|
|
flush_queue_.pop_front();
|
|
// TODO: need to unset flush reason?
|
|
return flush_req;
|
|
}
|
|
|
|
ColumnFamilyData* DBImpl::PickCompactionFromQueue(
|
|
std::unique_ptr<TaskLimiterToken>* token, LogBuffer* log_buffer) {
|
|
assert(!compaction_queue_.empty());
|
|
assert(*token == nullptr);
|
|
autovector<ColumnFamilyData*> throttled_candidates;
|
|
ColumnFamilyData* cfd = nullptr;
|
|
while (!compaction_queue_.empty()) {
|
|
auto first_cfd = *compaction_queue_.begin();
|
|
compaction_queue_.pop_front();
|
|
assert(first_cfd->queued_for_compaction());
|
|
if (!RequestCompactionToken(first_cfd, false, token, log_buffer)) {
|
|
throttled_candidates.push_back(first_cfd);
|
|
continue;
|
|
}
|
|
cfd = first_cfd;
|
|
cfd->set_queued_for_compaction(false);
|
|
break;
|
|
}
|
|
// Add throttled compaction candidates back to queue in the original order.
|
|
for (auto iter = throttled_candidates.rbegin();
|
|
iter != throttled_candidates.rend(); ++iter) {
|
|
compaction_queue_.push_front(*iter);
|
|
}
|
|
return cfd;
|
|
}
|
|
|
|
void DBImpl::SchedulePendingFlush(const FlushRequest& flush_req,
|
|
FlushReason flush_reason) {
|
|
if (flush_req.empty()) {
|
|
return;
|
|
}
|
|
for (auto& iter : flush_req) {
|
|
ColumnFamilyData* cfd = iter.first;
|
|
cfd->Ref();
|
|
cfd->SetFlushReason(flush_reason);
|
|
}
|
|
++unscheduled_flushes_;
|
|
flush_queue_.push_back(flush_req);
|
|
}
|
|
|
|
void DBImpl::SchedulePendingCompaction(ColumnFamilyData* cfd) {
|
|
if (!cfd->queued_for_compaction() && cfd->NeedsCompaction()) {
|
|
AddToCompactionQueue(cfd);
|
|
++unscheduled_compactions_;
|
|
}
|
|
}
|
|
|
|
void DBImpl::SchedulePendingPurge(std::string fname, std::string dir_to_sync,
|
|
FileType type, uint64_t number, int job_id) {
|
|
mutex_.AssertHeld();
|
|
PurgeFileInfo file_info(fname, dir_to_sync, type, number, job_id);
|
|
purge_files_.insert({{number, std::move(file_info)}});
|
|
}
|
|
|
|
void DBImpl::BGWorkFlush(void* arg) {
|
|
FlushThreadArg fta = *(reinterpret_cast<FlushThreadArg*>(arg));
|
|
delete reinterpret_cast<FlushThreadArg*>(arg);
|
|
|
|
IOSTATS_SET_THREAD_POOL_ID(fta.thread_pri_);
|
|
TEST_SYNC_POINT("DBImpl::BGWorkFlush");
|
|
static_cast_with_check<DBImpl>(fta.db_)->BackgroundCallFlush(fta.thread_pri_);
|
|
TEST_SYNC_POINT("DBImpl::BGWorkFlush:done");
|
|
}
|
|
|
|
void DBImpl::BGWorkCompaction(void* arg) {
|
|
CompactionArg ca = *(reinterpret_cast<CompactionArg*>(arg));
|
|
delete reinterpret_cast<CompactionArg*>(arg);
|
|
IOSTATS_SET_THREAD_POOL_ID(Env::Priority::LOW);
|
|
TEST_SYNC_POINT("DBImpl::BGWorkCompaction");
|
|
auto prepicked_compaction =
|
|
static_cast<PrepickedCompaction*>(ca.prepicked_compaction);
|
|
static_cast_with_check<DBImpl>(ca.db)->BackgroundCallCompaction(
|
|
prepicked_compaction, Env::Priority::LOW);
|
|
delete prepicked_compaction;
|
|
}
|
|
|
|
void DBImpl::BGWorkBottomCompaction(void* arg) {
|
|
CompactionArg ca = *(static_cast<CompactionArg*>(arg));
|
|
delete static_cast<CompactionArg*>(arg);
|
|
IOSTATS_SET_THREAD_POOL_ID(Env::Priority::BOTTOM);
|
|
TEST_SYNC_POINT("DBImpl::BGWorkBottomCompaction");
|
|
auto* prepicked_compaction = ca.prepicked_compaction;
|
|
assert(prepicked_compaction && prepicked_compaction->compaction &&
|
|
!prepicked_compaction->manual_compaction_state);
|
|
ca.db->BackgroundCallCompaction(prepicked_compaction, Env::Priority::BOTTOM);
|
|
delete prepicked_compaction;
|
|
}
|
|
|
|
void DBImpl::BGWorkPurge(void* db) {
|
|
IOSTATS_SET_THREAD_POOL_ID(Env::Priority::HIGH);
|
|
TEST_SYNC_POINT("DBImpl::BGWorkPurge:start");
|
|
reinterpret_cast<DBImpl*>(db)->BackgroundCallPurge();
|
|
TEST_SYNC_POINT("DBImpl::BGWorkPurge:end");
|
|
}
|
|
|
|
void DBImpl::UnscheduleCompactionCallback(void* arg) {
|
|
CompactionArg ca = *(reinterpret_cast<CompactionArg*>(arg));
|
|
delete reinterpret_cast<CompactionArg*>(arg);
|
|
if (ca.prepicked_compaction != nullptr) {
|
|
if (ca.prepicked_compaction->compaction != nullptr) {
|
|
delete ca.prepicked_compaction->compaction;
|
|
}
|
|
delete ca.prepicked_compaction;
|
|
}
|
|
TEST_SYNC_POINT("DBImpl::UnscheduleCompactionCallback");
|
|
}
|
|
|
|
void DBImpl::UnscheduleFlushCallback(void* arg) {
|
|
delete reinterpret_cast<FlushThreadArg*>(arg);
|
|
TEST_SYNC_POINT("DBImpl::UnscheduleFlushCallback");
|
|
}
|
|
|
|
Status DBImpl::BackgroundFlush(bool* made_progress, JobContext* job_context,
|
|
LogBuffer* log_buffer, FlushReason* reason,
|
|
Env::Priority thread_pri) {
|
|
mutex_.AssertHeld();
|
|
|
|
Status status;
|
|
*reason = FlushReason::kOthers;
|
|
// If BG work is stopped due to an error, but a recovery is in progress,
|
|
// that means this flush is part of the recovery. So allow it to go through
|
|
if (!error_handler_.IsBGWorkStopped()) {
|
|
if (shutting_down_.load(std::memory_order_acquire)) {
|
|
status = Status::ShutdownInProgress();
|
|
}
|
|
} else if (!error_handler_.IsRecoveryInProgress()) {
|
|
status = error_handler_.GetBGError();
|
|
}
|
|
|
|
if (!status.ok()) {
|
|
return status;
|
|
}
|
|
|
|
autovector<BGFlushArg> bg_flush_args;
|
|
std::vector<SuperVersionContext>& superversion_contexts =
|
|
job_context->superversion_contexts;
|
|
autovector<ColumnFamilyData*> column_families_not_to_flush;
|
|
while (!flush_queue_.empty()) {
|
|
// This cfd is already referenced
|
|
const FlushRequest& flush_req = PopFirstFromFlushQueue();
|
|
superversion_contexts.clear();
|
|
superversion_contexts.reserve(flush_req.size());
|
|
|
|
for (const auto& iter : flush_req) {
|
|
ColumnFamilyData* cfd = iter.first;
|
|
if (cfd->IsDropped() || !cfd->imm()->IsFlushPending()) {
|
|
// can't flush this CF, try next one
|
|
column_families_not_to_flush.push_back(cfd);
|
|
continue;
|
|
}
|
|
superversion_contexts.emplace_back(SuperVersionContext(true));
|
|
bg_flush_args.emplace_back(cfd, iter.second,
|
|
&(superversion_contexts.back()));
|
|
}
|
|
if (!bg_flush_args.empty()) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!bg_flush_args.empty()) {
|
|
auto bg_job_limits = GetBGJobLimits();
|
|
for (const auto& arg : bg_flush_args) {
|
|
ColumnFamilyData* cfd = arg.cfd_;
|
|
ROCKS_LOG_BUFFER(
|
|
log_buffer,
|
|
"Calling FlushMemTableToOutputFile with column "
|
|
"family [%s], flush slots available %d, compaction slots available "
|
|
"%d, "
|
|
"flush slots scheduled %d, compaction slots scheduled %d",
|
|
cfd->GetName().c_str(), bg_job_limits.max_flushes,
|
|
bg_job_limits.max_compactions, bg_flush_scheduled_,
|
|
bg_compaction_scheduled_);
|
|
}
|
|
status = FlushMemTablesToOutputFiles(bg_flush_args, made_progress,
|
|
job_context, log_buffer, thread_pri);
|
|
TEST_SYNC_POINT("DBImpl::BackgroundFlush:BeforeFlush");
|
|
// All the CFDs in the FlushReq must have the same flush reason, so just
|
|
// grab the first one
|
|
*reason = bg_flush_args[0].cfd_->GetFlushReason();
|
|
for (auto& arg : bg_flush_args) {
|
|
ColumnFamilyData* cfd = arg.cfd_;
|
|
if (cfd->UnrefAndTryDelete()) {
|
|
arg.cfd_ = nullptr;
|
|
}
|
|
}
|
|
}
|
|
for (auto cfd : column_families_not_to_flush) {
|
|
cfd->UnrefAndTryDelete();
|
|
}
|
|
return status;
|
|
}
|
|
|
|
void DBImpl::BackgroundCallFlush(Env::Priority thread_pri) {
|
|
bool made_progress = false;
|
|
JobContext job_context(next_job_id_.fetch_add(1), true);
|
|
|
|
TEST_SYNC_POINT("DBImpl::BackgroundCallFlush:start");
|
|
|
|
LogBuffer log_buffer(InfoLogLevel::INFO_LEVEL,
|
|
immutable_db_options_.info_log.get());
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
assert(bg_flush_scheduled_);
|
|
num_running_flushes_++;
|
|
|
|
std::unique_ptr<std::list<uint64_t>::iterator>
|
|
pending_outputs_inserted_elem(new std::list<uint64_t>::iterator(
|
|
CaptureCurrentFileNumberInPendingOutputs()));
|
|
FlushReason reason;
|
|
|
|
Status s = BackgroundFlush(&made_progress, &job_context, &log_buffer,
|
|
&reason, thread_pri);
|
|
if (!s.ok() && !s.IsShutdownInProgress() && !s.IsColumnFamilyDropped() &&
|
|
reason != FlushReason::kErrorRecovery) {
|
|
// Wait a little bit before retrying background flush in
|
|
// case this is an environmental problem and we do not want to
|
|
// chew up resources for failed flushes for the duration of
|
|
// the problem.
|
|
uint64_t error_cnt =
|
|
default_cf_internal_stats_->BumpAndGetBackgroundErrorCount();
|
|
bg_cv_.SignalAll(); // In case a waiter can proceed despite the error
|
|
mutex_.Unlock();
|
|
ROCKS_LOG_ERROR(immutable_db_options_.info_log,
|
|
"Waiting after background flush error: %s"
|
|
"Accumulated background error counts: %" PRIu64,
|
|
s.ToString().c_str(), error_cnt);
|
|
log_buffer.FlushBufferToLog();
|
|
LogFlush(immutable_db_options_.info_log);
|
|
env_->SleepForMicroseconds(1000000);
|
|
mutex_.Lock();
|
|
}
|
|
|
|
TEST_SYNC_POINT("DBImpl::BackgroundCallFlush:FlushFinish:0");
|
|
ReleaseFileNumberFromPendingOutputs(pending_outputs_inserted_elem);
|
|
|
|
// If flush failed, we want to delete all temporary files that we might have
|
|
// created. Thus, we force full scan in FindObsoleteFiles()
|
|
FindObsoleteFiles(&job_context, !s.ok() && !s.IsShutdownInProgress() &&
|
|
!s.IsColumnFamilyDropped());
|
|
// delete unnecessary files if any, this is done outside the mutex
|
|
if (job_context.HaveSomethingToClean() ||
|
|
job_context.HaveSomethingToDelete() || !log_buffer.IsEmpty()) {
|
|
mutex_.Unlock();
|
|
TEST_SYNC_POINT("DBImpl::BackgroundCallFlush:FilesFound");
|
|
// Have to flush the info logs before bg_flush_scheduled_--
|
|
// because if bg_flush_scheduled_ becomes 0 and the lock is
|
|
// released, the deconstructor of DB can kick in and destroy all the
|
|
// states of DB so info_log might not be available after that point.
|
|
// It also applies to access other states that DB owns.
|
|
log_buffer.FlushBufferToLog();
|
|
if (job_context.HaveSomethingToDelete()) {
|
|
PurgeObsoleteFiles(job_context);
|
|
}
|
|
job_context.Clean();
|
|
mutex_.Lock();
|
|
}
|
|
TEST_SYNC_POINT("DBImpl::BackgroundCallFlush:ContextCleanedUp");
|
|
|
|
assert(num_running_flushes_ > 0);
|
|
num_running_flushes_--;
|
|
bg_flush_scheduled_--;
|
|
// See if there's more work to be done
|
|
MaybeScheduleFlushOrCompaction();
|
|
atomic_flush_install_cv_.SignalAll();
|
|
bg_cv_.SignalAll();
|
|
// IMPORTANT: there should be no code after calling SignalAll. This call may
|
|
// signal the DB destructor that it's OK to proceed with destruction. In
|
|
// that case, all DB variables will be dealloacated and referencing them
|
|
// will cause trouble.
|
|
}
|
|
}
|
|
|
|
void DBImpl::BackgroundCallCompaction(PrepickedCompaction* prepicked_compaction,
|
|
Env::Priority bg_thread_pri) {
|
|
bool made_progress = false;
|
|
JobContext job_context(next_job_id_.fetch_add(1), true);
|
|
TEST_SYNC_POINT("BackgroundCallCompaction:0");
|
|
LogBuffer log_buffer(InfoLogLevel::INFO_LEVEL,
|
|
immutable_db_options_.info_log.get());
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
|
|
// This call will unlock/lock the mutex to wait for current running
|
|
// IngestExternalFile() calls to finish.
|
|
WaitForIngestFile();
|
|
|
|
num_running_compactions_++;
|
|
|
|
std::unique_ptr<std::list<uint64_t>::iterator>
|
|
pending_outputs_inserted_elem(new std::list<uint64_t>::iterator(
|
|
CaptureCurrentFileNumberInPendingOutputs()));
|
|
|
|
assert((bg_thread_pri == Env::Priority::BOTTOM &&
|
|
bg_bottom_compaction_scheduled_) ||
|
|
(bg_thread_pri == Env::Priority::LOW && bg_compaction_scheduled_));
|
|
Status s = BackgroundCompaction(&made_progress, &job_context, &log_buffer,
|
|
prepicked_compaction, bg_thread_pri);
|
|
TEST_SYNC_POINT("BackgroundCallCompaction:1");
|
|
if (s.IsBusy()) {
|
|
bg_cv_.SignalAll(); // In case a waiter can proceed despite the error
|
|
mutex_.Unlock();
|
|
env_->SleepForMicroseconds(10000); // prevent hot loop
|
|
mutex_.Lock();
|
|
} else if (!s.ok() && !s.IsShutdownInProgress() &&
|
|
!s.IsManualCompactionPaused() && !s.IsColumnFamilyDropped()) {
|
|
// Wait a little bit before retrying background compaction in
|
|
// case this is an environmental problem and we do not want to
|
|
// chew up resources for failed compactions for the duration of
|
|
// the problem.
|
|
uint64_t error_cnt =
|
|
default_cf_internal_stats_->BumpAndGetBackgroundErrorCount();
|
|
bg_cv_.SignalAll(); // In case a waiter can proceed despite the error
|
|
mutex_.Unlock();
|
|
log_buffer.FlushBufferToLog();
|
|
ROCKS_LOG_ERROR(immutable_db_options_.info_log,
|
|
"Waiting after background compaction error: %s, "
|
|
"Accumulated background error counts: %" PRIu64,
|
|
s.ToString().c_str(), error_cnt);
|
|
LogFlush(immutable_db_options_.info_log);
|
|
env_->SleepForMicroseconds(1000000);
|
|
mutex_.Lock();
|
|
} else if (s.IsManualCompactionPaused()) {
|
|
ManualCompactionState* m = prepicked_compaction->manual_compaction_state;
|
|
assert(m);
|
|
ROCKS_LOG_BUFFER(&log_buffer, "[%s] [JOB %d] Manual compaction paused",
|
|
m->cfd->GetName().c_str(), job_context.job_id);
|
|
}
|
|
|
|
ReleaseFileNumberFromPendingOutputs(pending_outputs_inserted_elem);
|
|
|
|
// If compaction failed, we want to delete all temporary files that we might
|
|
// have created (they might not be all recorded in job_context in case of a
|
|
// failure). Thus, we force full scan in FindObsoleteFiles()
|
|
FindObsoleteFiles(&job_context, !s.ok() && !s.IsShutdownInProgress() &&
|
|
!s.IsManualCompactionPaused() &&
|
|
!s.IsColumnFamilyDropped());
|
|
TEST_SYNC_POINT("DBImpl::BackgroundCallCompaction:FoundObsoleteFiles");
|
|
|
|
// delete unnecessary files if any, this is done outside the mutex
|
|
if (job_context.HaveSomethingToClean() ||
|
|
job_context.HaveSomethingToDelete() || !log_buffer.IsEmpty()) {
|
|
mutex_.Unlock();
|
|
// Have to flush the info logs before bg_compaction_scheduled_--
|
|
// because if bg_flush_scheduled_ becomes 0 and the lock is
|
|
// released, the deconstructor of DB can kick in and destroy all the
|
|
// states of DB so info_log might not be available after that point.
|
|
// It also applies to access other states that DB owns.
|
|
log_buffer.FlushBufferToLog();
|
|
if (job_context.HaveSomethingToDelete()) {
|
|
PurgeObsoleteFiles(job_context);
|
|
TEST_SYNC_POINT("DBImpl::BackgroundCallCompaction:PurgedObsoleteFiles");
|
|
}
|
|
job_context.Clean();
|
|
mutex_.Lock();
|
|
}
|
|
|
|
assert(num_running_compactions_ > 0);
|
|
num_running_compactions_--;
|
|
if (bg_thread_pri == Env::Priority::LOW) {
|
|
bg_compaction_scheduled_--;
|
|
} else {
|
|
assert(bg_thread_pri == Env::Priority::BOTTOM);
|
|
bg_bottom_compaction_scheduled_--;
|
|
}
|
|
|
|
versions_->GetColumnFamilySet()->FreeDeadColumnFamilies();
|
|
|
|
// See if there's more work to be done
|
|
MaybeScheduleFlushOrCompaction();
|
|
if (made_progress ||
|
|
(bg_compaction_scheduled_ == 0 &&
|
|
bg_bottom_compaction_scheduled_ == 0) ||
|
|
HasPendingManualCompaction() || unscheduled_compactions_ == 0) {
|
|
// signal if
|
|
// * made_progress -- need to wakeup DelayWrite
|
|
// * bg_{bottom,}_compaction_scheduled_ == 0 -- need to wakeup ~DBImpl
|
|
// * HasPendingManualCompaction -- need to wakeup RunManualCompaction
|
|
// If none of this is true, there is no need to signal since nobody is
|
|
// waiting for it
|
|
bg_cv_.SignalAll();
|
|
}
|
|
// IMPORTANT: there should be no code after calling SignalAll. This call may
|
|
// signal the DB destructor that it's OK to proceed with destruction. In
|
|
// that case, all DB variables will be dealloacated and referencing them
|
|
// will cause trouble.
|
|
}
|
|
}
|
|
|
|
Status DBImpl::BackgroundCompaction(bool* made_progress,
|
|
JobContext* job_context,
|
|
LogBuffer* log_buffer,
|
|
PrepickedCompaction* prepicked_compaction,
|
|
Env::Priority thread_pri) {
|
|
ManualCompactionState* manual_compaction =
|
|
prepicked_compaction == nullptr
|
|
? nullptr
|
|
: prepicked_compaction->manual_compaction_state;
|
|
*made_progress = false;
|
|
mutex_.AssertHeld();
|
|
TEST_SYNC_POINT("DBImpl::BackgroundCompaction:Start");
|
|
|
|
bool is_manual = (manual_compaction != nullptr);
|
|
std::unique_ptr<Compaction> c;
|
|
if (prepicked_compaction != nullptr &&
|
|
prepicked_compaction->compaction != nullptr) {
|
|
c.reset(prepicked_compaction->compaction);
|
|
}
|
|
bool is_prepicked = is_manual || c;
|
|
|
|
// (manual_compaction->in_progress == false);
|
|
bool trivial_move_disallowed =
|
|
is_manual && manual_compaction->disallow_trivial_move;
|
|
|
|
CompactionJobStats compaction_job_stats;
|
|
Status status;
|
|
if (!error_handler_.IsBGWorkStopped()) {
|
|
if (shutting_down_.load(std::memory_order_acquire)) {
|
|
status = Status::ShutdownInProgress();
|
|
} else if (is_manual &&
|
|
manual_compaction_paused_.load(std::memory_order_acquire) > 0) {
|
|
status = Status::Incomplete(Status::SubCode::kManualCompactionPaused);
|
|
}
|
|
} else {
|
|
status = error_handler_.GetBGError();
|
|
// If we get here, it means a hard error happened after this compaction
|
|
// was scheduled by MaybeScheduleFlushOrCompaction(), but before it got
|
|
// a chance to execute. Since we didn't pop a cfd from the compaction
|
|
// queue, increment unscheduled_compactions_
|
|
unscheduled_compactions_++;
|
|
}
|
|
|
|
if (!status.ok()) {
|
|
if (is_manual) {
|
|
manual_compaction->status = status;
|
|
manual_compaction->done = true;
|
|
manual_compaction->in_progress = false;
|
|
manual_compaction = nullptr;
|
|
}
|
|
if (c) {
|
|
c->ReleaseCompactionFiles(status);
|
|
c.reset();
|
|
}
|
|
return status;
|
|
}
|
|
|
|
if (is_manual) {
|
|
// another thread cannot pick up the same work
|
|
manual_compaction->in_progress = true;
|
|
}
|
|
|
|
std::unique_ptr<TaskLimiterToken> task_token;
|
|
|
|
// InternalKey manual_end_storage;
|
|
// InternalKey* manual_end = &manual_end_storage;
|
|
bool sfm_reserved_compact_space = false;
|
|
if (is_manual) {
|
|
ManualCompactionState* m = manual_compaction;
|
|
assert(m->in_progress);
|
|
if (!c) {
|
|
m->done = true;
|
|
m->manual_end = nullptr;
|
|
ROCKS_LOG_BUFFER(
|
|
log_buffer,
|
|
"[%s] Manual compaction from level-%d from %s .. "
|
|
"%s; nothing to do\n",
|
|
m->cfd->GetName().c_str(), m->input_level,
|
|
(m->begin ? m->begin->DebugString(true).c_str() : "(begin)"),
|
|
(m->end ? m->end->DebugString(true).c_str() : "(end)"));
|
|
} else {
|
|
// First check if we have enough room to do the compaction
|
|
bool enough_room = EnoughRoomForCompaction(
|
|
m->cfd, *(c->inputs()), &sfm_reserved_compact_space, log_buffer);
|
|
|
|
if (!enough_room) {
|
|
// Then don't do the compaction
|
|
c->ReleaseCompactionFiles(status);
|
|
c.reset();
|
|
// m's vars will get set properly at the end of this function,
|
|
// as long as status == CompactionTooLarge
|
|
status = Status::CompactionTooLarge();
|
|
} else {
|
|
ROCKS_LOG_BUFFER(
|
|
log_buffer,
|
|
"[%s] Manual compaction from level-%d to level-%d from %s .. "
|
|
"%s; will stop at %s\n",
|
|
m->cfd->GetName().c_str(), m->input_level, c->output_level(),
|
|
(m->begin ? m->begin->DebugString(true).c_str() : "(begin)"),
|
|
(m->end ? m->end->DebugString(true).c_str() : "(end)"),
|
|
((m->done || m->manual_end == nullptr)
|
|
? "(end)"
|
|
: m->manual_end->DebugString(true).c_str()));
|
|
}
|
|
}
|
|
} else if (!is_prepicked && !compaction_queue_.empty()) {
|
|
if (HasExclusiveManualCompaction()) {
|
|
// Can't compact right now, but try again later
|
|
TEST_SYNC_POINT("DBImpl::BackgroundCompaction()::Conflict");
|
|
|
|
// Stay in the compaction queue.
|
|
unscheduled_compactions_++;
|
|
|
|
return Status::OK();
|
|
}
|
|
|
|
auto cfd = PickCompactionFromQueue(&task_token, log_buffer);
|
|
if (cfd == nullptr) {
|
|
// Can't find any executable task from the compaction queue.
|
|
// All tasks have been throttled by compaction thread limiter.
|
|
++unscheduled_compactions_;
|
|
return Status::Busy();
|
|
}
|
|
|
|
// We unreference here because the following code will take a Ref() on
|
|
// this cfd if it is going to use it (Compaction class holds a
|
|
// reference).
|
|
// This will all happen under a mutex so we don't have to be afraid of
|
|
// somebody else deleting it.
|
|
if (cfd->UnrefAndTryDelete()) {
|
|
// This was the last reference of the column family, so no need to
|
|
// compact.
|
|
return Status::OK();
|
|
}
|
|
|
|
// Pick up latest mutable CF Options and use it throughout the
|
|
// compaction job
|
|
// Compaction makes a copy of the latest MutableCFOptions. It should be used
|
|
// throughout the compaction procedure to make sure consistency. It will
|
|
// eventually be installed into SuperVersion
|
|
auto* mutable_cf_options = cfd->GetLatestMutableCFOptions();
|
|
if (!mutable_cf_options->disable_auto_compactions && !cfd->IsDropped()) {
|
|
// NOTE: try to avoid unnecessary copy of MutableCFOptions if
|
|
// compaction is not necessary. Need to make sure mutex is held
|
|
// until we make a copy in the following code
|
|
TEST_SYNC_POINT("DBImpl::BackgroundCompaction():BeforePickCompaction");
|
|
c.reset(cfd->PickCompaction(*mutable_cf_options, mutable_db_options_,
|
|
log_buffer));
|
|
TEST_SYNC_POINT("DBImpl::BackgroundCompaction():AfterPickCompaction");
|
|
|
|
if (c != nullptr) {
|
|
bool enough_room = EnoughRoomForCompaction(
|
|
cfd, *(c->inputs()), &sfm_reserved_compact_space, log_buffer);
|
|
|
|
if (!enough_room) {
|
|
// Then don't do the compaction
|
|
c->ReleaseCompactionFiles(status);
|
|
c->column_family_data()
|
|
->current()
|
|
->storage_info()
|
|
->ComputeCompactionScore(*(c->immutable_cf_options()),
|
|
*(c->mutable_cf_options()));
|
|
AddToCompactionQueue(cfd);
|
|
++unscheduled_compactions_;
|
|
|
|
c.reset();
|
|
// Don't need to sleep here, because BackgroundCallCompaction
|
|
// will sleep if !s.ok()
|
|
status = Status::CompactionTooLarge();
|
|
} else {
|
|
// update statistics
|
|
RecordInHistogram(stats_, NUM_FILES_IN_SINGLE_COMPACTION,
|
|
c->inputs(0)->size());
|
|
// There are three things that can change compaction score:
|
|
// 1) When flush or compaction finish. This case is covered by
|
|
// InstallSuperVersionAndScheduleWork
|
|
// 2) When MutableCFOptions changes. This case is also covered by
|
|
// InstallSuperVersionAndScheduleWork, because this is when the new
|
|
// options take effect.
|
|
// 3) When we Pick a new compaction, we "remove" those files being
|
|
// compacted from the calculation, which then influences compaction
|
|
// score. Here we check if we need the new compaction even without the
|
|
// files that are currently being compacted. If we need another
|
|
// compaction, we might be able to execute it in parallel, so we add
|
|
// it to the queue and schedule a new thread.
|
|
if (cfd->NeedsCompaction()) {
|
|
// Yes, we need more compactions!
|
|
AddToCompactionQueue(cfd);
|
|
++unscheduled_compactions_;
|
|
MaybeScheduleFlushOrCompaction();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
IOStatus io_s;
|
|
if (!c) {
|
|
// Nothing to do
|
|
ROCKS_LOG_BUFFER(log_buffer, "Compaction nothing to do");
|
|
} else if (c->deletion_compaction()) {
|
|
// TODO(icanadi) Do we want to honor snapshots here? i.e. not delete old
|
|
// file if there is alive snapshot pointing to it
|
|
TEST_SYNC_POINT_CALLBACK("DBImpl::BackgroundCompaction:BeforeCompaction",
|
|
c->column_family_data());
|
|
assert(c->num_input_files(1) == 0);
|
|
assert(c->level() == 0);
|
|
assert(c->column_family_data()->ioptions()->compaction_style ==
|
|
kCompactionStyleFIFO);
|
|
|
|
compaction_job_stats.num_input_files = c->num_input_files(0);
|
|
|
|
NotifyOnCompactionBegin(c->column_family_data(), c.get(), status,
|
|
compaction_job_stats, job_context->job_id);
|
|
|
|
for (const auto& f : *c->inputs(0)) {
|
|
c->edit()->DeleteFile(c->level(), f->fd.GetNumber());
|
|
}
|
|
status = versions_->LogAndApply(c->column_family_data(),
|
|
*c->mutable_cf_options(), c->edit(),
|
|
&mutex_, directories_.GetDbDir());
|
|
io_s = versions_->io_status();
|
|
InstallSuperVersionAndScheduleWork(c->column_family_data(),
|
|
&job_context->superversion_contexts[0],
|
|
*c->mutable_cf_options());
|
|
ROCKS_LOG_BUFFER(log_buffer, "[%s] Deleted %d files\n",
|
|
c->column_family_data()->GetName().c_str(),
|
|
c->num_input_files(0));
|
|
*made_progress = true;
|
|
TEST_SYNC_POINT_CALLBACK("DBImpl::BackgroundCompaction:AfterCompaction",
|
|
c->column_family_data());
|
|
} else if (!trivial_move_disallowed && c->IsTrivialMove()) {
|
|
TEST_SYNC_POINT("DBImpl::BackgroundCompaction:TrivialMove");
|
|
TEST_SYNC_POINT_CALLBACK("DBImpl::BackgroundCompaction:BeforeCompaction",
|
|
c->column_family_data());
|
|
// Instrument for event update
|
|
// TODO(yhchiang): add op details for showing trivial-move.
|
|
ThreadStatusUtil::SetColumnFamily(
|
|
c->column_family_data(), c->column_family_data()->ioptions()->env,
|
|
immutable_db_options_.enable_thread_tracking);
|
|
ThreadStatusUtil::SetThreadOperation(ThreadStatus::OP_COMPACTION);
|
|
|
|
compaction_job_stats.num_input_files = c->num_input_files(0);
|
|
|
|
NotifyOnCompactionBegin(c->column_family_data(), c.get(), status,
|
|
compaction_job_stats, job_context->job_id);
|
|
|
|
// Move files to next level
|
|
int32_t moved_files = 0;
|
|
int64_t moved_bytes = 0;
|
|
for (unsigned int l = 0; l < c->num_input_levels(); l++) {
|
|
if (c->level(l) == c->output_level()) {
|
|
continue;
|
|
}
|
|
for (size_t i = 0; i < c->num_input_files(l); i++) {
|
|
FileMetaData* f = c->input(l, i);
|
|
c->edit()->DeleteFile(c->level(l), f->fd.GetNumber());
|
|
c->edit()->AddFile(c->output_level(), f->fd.GetNumber(),
|
|
f->fd.GetPathId(), f->fd.GetFileSize(), f->smallest,
|
|
f->largest, f->fd.smallest_seqno,
|
|
f->fd.largest_seqno, f->marked_for_compaction,
|
|
f->oldest_blob_file_number, f->oldest_ancester_time,
|
|
f->file_creation_time, f->file_checksum,
|
|
f->file_checksum_func_name);
|
|
|
|
ROCKS_LOG_BUFFER(
|
|
log_buffer,
|
|
"[%s] Moving #%" PRIu64 " to level-%d %" PRIu64 " bytes\n",
|
|
c->column_family_data()->GetName().c_str(), f->fd.GetNumber(),
|
|
c->output_level(), f->fd.GetFileSize());
|
|
++moved_files;
|
|
moved_bytes += f->fd.GetFileSize();
|
|
}
|
|
}
|
|
|
|
status = versions_->LogAndApply(c->column_family_data(),
|
|
*c->mutable_cf_options(), c->edit(),
|
|
&mutex_, directories_.GetDbDir());
|
|
io_s = versions_->io_status();
|
|
// Use latest MutableCFOptions
|
|
InstallSuperVersionAndScheduleWork(c->column_family_data(),
|
|
&job_context->superversion_contexts[0],
|
|
*c->mutable_cf_options());
|
|
|
|
VersionStorageInfo::LevelSummaryStorage tmp;
|
|
c->column_family_data()->internal_stats()->IncBytesMoved(c->output_level(),
|
|
moved_bytes);
|
|
{
|
|
event_logger_.LogToBuffer(log_buffer)
|
|
<< "job" << job_context->job_id << "event"
|
|
<< "trivial_move"
|
|
<< "destination_level" << c->output_level() << "files" << moved_files
|
|
<< "total_files_size" << moved_bytes;
|
|
}
|
|
ROCKS_LOG_BUFFER(
|
|
log_buffer,
|
|
"[%s] Moved #%d files to level-%d %" PRIu64 " bytes %s: %s\n",
|
|
c->column_family_data()->GetName().c_str(), moved_files,
|
|
c->output_level(), moved_bytes, status.ToString().c_str(),
|
|
c->column_family_data()->current()->storage_info()->LevelSummary(&tmp));
|
|
*made_progress = true;
|
|
|
|
// Clear Instrument
|
|
ThreadStatusUtil::ResetThreadStatus();
|
|
TEST_SYNC_POINT_CALLBACK("DBImpl::BackgroundCompaction:AfterCompaction",
|
|
c->column_family_data());
|
|
} else if (!is_prepicked && c->output_level() > 0 &&
|
|
c->output_level() ==
|
|
c->column_family_data()
|
|
->current()
|
|
->storage_info()
|
|
->MaxOutputLevel(
|
|
immutable_db_options_.allow_ingest_behind) &&
|
|
env_->GetBackgroundThreads(Env::Priority::BOTTOM) > 0) {
|
|
// Forward compactions involving last level to the bottom pool if it exists,
|
|
// such that compactions unlikely to contribute to write stalls can be
|
|
// delayed or deprioritized.
|
|
TEST_SYNC_POINT("DBImpl::BackgroundCompaction:ForwardToBottomPriPool");
|
|
CompactionArg* ca = new CompactionArg;
|
|
ca->db = this;
|
|
ca->prepicked_compaction = new PrepickedCompaction;
|
|
ca->prepicked_compaction->compaction = c.release();
|
|
ca->prepicked_compaction->manual_compaction_state = nullptr;
|
|
// Transfer requested token, so it doesn't need to do it again.
|
|
ca->prepicked_compaction->task_token = std::move(task_token);
|
|
++bg_bottom_compaction_scheduled_;
|
|
env_->Schedule(&DBImpl::BGWorkBottomCompaction, ca, Env::Priority::BOTTOM,
|
|
this, &DBImpl::UnscheduleCompactionCallback);
|
|
} else {
|
|
TEST_SYNC_POINT_CALLBACK("DBImpl::BackgroundCompaction:BeforeCompaction",
|
|
c->column_family_data());
|
|
int output_level __attribute__((__unused__));
|
|
output_level = c->output_level();
|
|
TEST_SYNC_POINT_CALLBACK("DBImpl::BackgroundCompaction:NonTrivial",
|
|
&output_level);
|
|
std::vector<SequenceNumber> snapshot_seqs;
|
|
SequenceNumber earliest_write_conflict_snapshot;
|
|
SnapshotChecker* snapshot_checker;
|
|
GetSnapshotContext(job_context, &snapshot_seqs,
|
|
&earliest_write_conflict_snapshot, &snapshot_checker);
|
|
assert(is_snapshot_supported_ || snapshots_.empty());
|
|
CompactionJob compaction_job(
|
|
job_context->job_id, c.get(), immutable_db_options_,
|
|
file_options_for_compaction_, versions_.get(), &shutting_down_,
|
|
preserve_deletes_seqnum_.load(), log_buffer, directories_.GetDbDir(),
|
|
GetDataDir(c->column_family_data(), c->output_path_id()), stats_,
|
|
&mutex_, &error_handler_, snapshot_seqs,
|
|
earliest_write_conflict_snapshot, snapshot_checker, table_cache_,
|
|
&event_logger_, c->mutable_cf_options()->paranoid_file_checks,
|
|
c->mutable_cf_options()->report_bg_io_stats, dbname_,
|
|
&compaction_job_stats, thread_pri, io_tracer_,
|
|
is_manual ? &manual_compaction_paused_ : nullptr, db_id_,
|
|
db_session_id_);
|
|
compaction_job.Prepare();
|
|
|
|
NotifyOnCompactionBegin(c->column_family_data(), c.get(), status,
|
|
compaction_job_stats, job_context->job_id);
|
|
mutex_.Unlock();
|
|
TEST_SYNC_POINT_CALLBACK(
|
|
"DBImpl::BackgroundCompaction:NonTrivial:BeforeRun", nullptr);
|
|
compaction_job.Run();
|
|
TEST_SYNC_POINT("DBImpl::BackgroundCompaction:NonTrivial:AfterRun");
|
|
mutex_.Lock();
|
|
|
|
status = compaction_job.Install(*c->mutable_cf_options());
|
|
io_s = compaction_job.io_status();
|
|
if (status.ok()) {
|
|
InstallSuperVersionAndScheduleWork(c->column_family_data(),
|
|
&job_context->superversion_contexts[0],
|
|
*c->mutable_cf_options());
|
|
}
|
|
*made_progress = true;
|
|
TEST_SYNC_POINT_CALLBACK("DBImpl::BackgroundCompaction:AfterCompaction",
|
|
c->column_family_data());
|
|
}
|
|
|
|
if (status.ok() && !io_s.ok()) {
|
|
status = io_s;
|
|
}
|
|
|
|
if (c != nullptr) {
|
|
c->ReleaseCompactionFiles(status);
|
|
*made_progress = true;
|
|
|
|
#ifndef ROCKSDB_LITE
|
|
// Need to make sure SstFileManager does its bookkeeping
|
|
auto sfm = static_cast<SstFileManagerImpl*>(
|
|
immutable_db_options_.sst_file_manager.get());
|
|
if (sfm && sfm_reserved_compact_space) {
|
|
sfm->OnCompactionCompletion(c.get());
|
|
}
|
|
#endif // ROCKSDB_LITE
|
|
|
|
NotifyOnCompactionCompleted(c->column_family_data(), c.get(), status,
|
|
compaction_job_stats, job_context->job_id);
|
|
}
|
|
|
|
if (status.ok() || status.IsCompactionTooLarge() ||
|
|
status.IsManualCompactionPaused()) {
|
|
// Done
|
|
} else if (status.IsColumnFamilyDropped() || status.IsShutdownInProgress()) {
|
|
// Ignore compaction errors found during shutting down
|
|
} else {
|
|
ROCKS_LOG_WARN(immutable_db_options_.info_log, "Compaction error: %s",
|
|
status.ToString().c_str());
|
|
if (!io_s.ok()) {
|
|
// Error while writing to MANIFEST.
|
|
// In fact, versions_->io_status() can also be the result of renaming
|
|
// CURRENT file. With current code, it's just difficult to tell. So just
|
|
// be pessimistic and try write to a new MANIFEST.
|
|
// TODO: distinguish between MANIFEST write and CURRENT renaming
|
|
auto err_reason = versions_->io_status().ok()
|
|
? BackgroundErrorReason::kCompaction
|
|
: BackgroundErrorReason::kManifestWrite;
|
|
error_handler_.SetBGError(io_s, err_reason);
|
|
} else {
|
|
error_handler_.SetBGError(status, BackgroundErrorReason::kCompaction);
|
|
}
|
|
if (c != nullptr && !is_manual && !error_handler_.IsBGWorkStopped()) {
|
|
// Put this cfd back in the compaction queue so we can retry after some
|
|
// time
|
|
auto cfd = c->column_family_data();
|
|
assert(cfd != nullptr);
|
|
// Since this compaction failed, we need to recompute the score so it
|
|
// takes the original input files into account
|
|
c->column_family_data()
|
|
->current()
|
|
->storage_info()
|
|
->ComputeCompactionScore(*(c->immutable_cf_options()),
|
|
*(c->mutable_cf_options()));
|
|
if (!cfd->queued_for_compaction()) {
|
|
AddToCompactionQueue(cfd);
|
|
++unscheduled_compactions_;
|
|
}
|
|
}
|
|
}
|
|
// this will unref its input_version and column_family_data
|
|
c.reset();
|
|
|
|
if (is_manual) {
|
|
ManualCompactionState* m = manual_compaction;
|
|
if (!status.ok()) {
|
|
m->status = status;
|
|
m->done = true;
|
|
}
|
|
// For universal compaction:
|
|
// Because universal compaction always happens at level 0, so one
|
|
// compaction will pick up all overlapped files. No files will be
|
|
// filtered out due to size limit and left for a successive compaction.
|
|
// So we can safely conclude the current compaction.
|
|
//
|
|
// Also note that, if we don't stop here, then the current compaction
|
|
// writes a new file back to level 0, which will be used in successive
|
|
// compaction. Hence the manual compaction will never finish.
|
|
//
|
|
// Stop the compaction if manual_end points to nullptr -- this means
|
|
// that we compacted the whole range. manual_end should always point
|
|
// to nullptr in case of universal compaction
|
|
if (m->manual_end == nullptr) {
|
|
m->done = true;
|
|
}
|
|
if (!m->done) {
|
|
// We only compacted part of the requested range. Update *m
|
|
// to the range that is left to be compacted.
|
|
// Universal and FIFO compactions should always compact the whole range
|
|
assert(m->cfd->ioptions()->compaction_style !=
|
|
kCompactionStyleUniversal ||
|
|
m->cfd->ioptions()->num_levels > 1);
|
|
assert(m->cfd->ioptions()->compaction_style != kCompactionStyleFIFO);
|
|
m->tmp_storage = *m->manual_end;
|
|
m->begin = &m->tmp_storage;
|
|
m->incomplete = true;
|
|
}
|
|
m->in_progress = false; // not being processed anymore
|
|
}
|
|
TEST_SYNC_POINT("DBImpl::BackgroundCompaction:Finish");
|
|
return status;
|
|
}
|
|
|
|
bool DBImpl::HasPendingManualCompaction() {
|
|
return (!manual_compaction_dequeue_.empty());
|
|
}
|
|
|
|
void DBImpl::AddManualCompaction(DBImpl::ManualCompactionState* m) {
|
|
manual_compaction_dequeue_.push_back(m);
|
|
}
|
|
|
|
void DBImpl::RemoveManualCompaction(DBImpl::ManualCompactionState* m) {
|
|
// Remove from queue
|
|
std::deque<ManualCompactionState*>::iterator it =
|
|
manual_compaction_dequeue_.begin();
|
|
while (it != manual_compaction_dequeue_.end()) {
|
|
if (m == (*it)) {
|
|
it = manual_compaction_dequeue_.erase(it);
|
|
return;
|
|
}
|
|
++it;
|
|
}
|
|
assert(false);
|
|
return;
|
|
}
|
|
|
|
bool DBImpl::ShouldntRunManualCompaction(ManualCompactionState* m) {
|
|
if (num_running_ingest_file_ > 0) {
|
|
// We need to wait for other IngestExternalFile() calls to finish
|
|
// before running a manual compaction.
|
|
return true;
|
|
}
|
|
if (m->exclusive) {
|
|
return (bg_bottom_compaction_scheduled_ > 0 ||
|
|
bg_compaction_scheduled_ > 0);
|
|
}
|
|
std::deque<ManualCompactionState*>::iterator it =
|
|
manual_compaction_dequeue_.begin();
|
|
bool seen = false;
|
|
while (it != manual_compaction_dequeue_.end()) {
|
|
if (m == (*it)) {
|
|
++it;
|
|
seen = true;
|
|
continue;
|
|
} else if (MCOverlap(m, (*it)) && (!seen && !(*it)->in_progress)) {
|
|
// Consider the other manual compaction *it, conflicts if:
|
|
// overlaps with m
|
|
// and (*it) is ahead in the queue and is not yet in progress
|
|
return true;
|
|
}
|
|
++it;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool DBImpl::HaveManualCompaction(ColumnFamilyData* cfd) {
|
|
// Remove from priority queue
|
|
std::deque<ManualCompactionState*>::iterator it =
|
|
manual_compaction_dequeue_.begin();
|
|
while (it != manual_compaction_dequeue_.end()) {
|
|
if ((*it)->exclusive) {
|
|
return true;
|
|
}
|
|
if ((cfd == (*it)->cfd) && (!((*it)->in_progress || (*it)->done))) {
|
|
// Allow automatic compaction if manual compaction is
|
|
// in progress
|
|
return true;
|
|
}
|
|
++it;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool DBImpl::HasExclusiveManualCompaction() {
|
|
// Remove from priority queue
|
|
std::deque<ManualCompactionState*>::iterator it =
|
|
manual_compaction_dequeue_.begin();
|
|
while (it != manual_compaction_dequeue_.end()) {
|
|
if ((*it)->exclusive) {
|
|
return true;
|
|
}
|
|
++it;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool DBImpl::MCOverlap(ManualCompactionState* m, ManualCompactionState* m1) {
|
|
if ((m->exclusive) || (m1->exclusive)) {
|
|
return true;
|
|
}
|
|
if (m->cfd != m1->cfd) {
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
#ifndef ROCKSDB_LITE
|
|
void DBImpl::BuildCompactionJobInfo(
|
|
const ColumnFamilyData* cfd, Compaction* c, const Status& st,
|
|
const CompactionJobStats& compaction_job_stats, const int job_id,
|
|
const Version* current, CompactionJobInfo* compaction_job_info) const {
|
|
assert(compaction_job_info != nullptr);
|
|
compaction_job_info->cf_id = cfd->GetID();
|
|
compaction_job_info->cf_name = cfd->GetName();
|
|
compaction_job_info->status = st;
|
|
compaction_job_info->thread_id = env_->GetThreadID();
|
|
compaction_job_info->job_id = job_id;
|
|
compaction_job_info->base_input_level = c->start_level();
|
|
compaction_job_info->output_level = c->output_level();
|
|
compaction_job_info->stats = compaction_job_stats;
|
|
compaction_job_info->table_properties = c->GetOutputTableProperties();
|
|
compaction_job_info->compaction_reason = c->compaction_reason();
|
|
compaction_job_info->compression = c->output_compression();
|
|
for (size_t i = 0; i < c->num_input_levels(); ++i) {
|
|
for (const auto fmd : *c->inputs(i)) {
|
|
const FileDescriptor& desc = fmd->fd;
|
|
const uint64_t file_number = desc.GetNumber();
|
|
auto fn = TableFileName(c->immutable_cf_options()->cf_paths, file_number,
|
|
desc.GetPathId());
|
|
compaction_job_info->input_files.push_back(fn);
|
|
compaction_job_info->input_file_infos.push_back(CompactionFileInfo{
|
|
static_cast<int>(i), file_number, fmd->oldest_blob_file_number});
|
|
if (compaction_job_info->table_properties.count(fn) == 0) {
|
|
std::shared_ptr<const TableProperties> tp;
|
|
auto s = current->GetTableProperties(&tp, fmd, &fn);
|
|
if (s.ok()) {
|
|
compaction_job_info->table_properties[fn] = tp;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
for (const auto& newf : c->edit()->GetNewFiles()) {
|
|
const FileMetaData& meta = newf.second;
|
|
const FileDescriptor& desc = meta.fd;
|
|
const uint64_t file_number = desc.GetNumber();
|
|
compaction_job_info->output_files.push_back(TableFileName(
|
|
c->immutable_cf_options()->cf_paths, file_number, desc.GetPathId()));
|
|
compaction_job_info->output_file_infos.push_back(CompactionFileInfo{
|
|
newf.first, file_number, meta.oldest_blob_file_number});
|
|
}
|
|
}
|
|
#endif
|
|
|
|
// SuperVersionContext gets created and destructed outside of the lock --
|
|
// we use this conveniently to:
|
|
// * malloc one SuperVersion() outside of the lock -- new_superversion
|
|
// * delete SuperVersion()s outside of the lock -- superversions_to_free
|
|
//
|
|
// However, if InstallSuperVersionAndScheduleWork() gets called twice with the
|
|
// same sv_context, we can't reuse the SuperVersion() that got
|
|
// malloced because
|
|
// first call already used it. In that rare case, we take a hit and create a
|
|
// new SuperVersion() inside of the mutex. We do similar thing
|
|
// for superversion_to_free
|
|
|
|
void DBImpl::InstallSuperVersionAndScheduleWork(
|
|
ColumnFamilyData* cfd, SuperVersionContext* sv_context,
|
|
const MutableCFOptions& mutable_cf_options) {
|
|
mutex_.AssertHeld();
|
|
|
|
// Update max_total_in_memory_state_
|
|
size_t old_memtable_size = 0;
|
|
auto* old_sv = cfd->GetSuperVersion();
|
|
if (old_sv) {
|
|
old_memtable_size = old_sv->mutable_cf_options.write_buffer_size *
|
|
old_sv->mutable_cf_options.max_write_buffer_number;
|
|
}
|
|
|
|
// this branch is unlikely to step in
|
|
if (UNLIKELY(sv_context->new_superversion == nullptr)) {
|
|
sv_context->NewSuperVersion();
|
|
}
|
|
cfd->InstallSuperVersion(sv_context, &mutex_, mutable_cf_options);
|
|
|
|
// There may be a small data race here. The snapshot tricking bottommost
|
|
// compaction may already be released here. But assuming there will always be
|
|
// newer snapshot created and released frequently, the compaction will be
|
|
// triggered soon anyway.
|
|
bottommost_files_mark_threshold_ = kMaxSequenceNumber;
|
|
for (auto* my_cfd : *versions_->GetColumnFamilySet()) {
|
|
bottommost_files_mark_threshold_ = std::min(
|
|
bottommost_files_mark_threshold_,
|
|
my_cfd->current()->storage_info()->bottommost_files_mark_threshold());
|
|
}
|
|
|
|
// Whenever we install new SuperVersion, we might need to issue new flushes or
|
|
// compactions.
|
|
SchedulePendingCompaction(cfd);
|
|
MaybeScheduleFlushOrCompaction();
|
|
|
|
// Update max_total_in_memory_state_
|
|
max_total_in_memory_state_ = max_total_in_memory_state_ - old_memtable_size +
|
|
mutable_cf_options.write_buffer_size *
|
|
mutable_cf_options.max_write_buffer_number;
|
|
}
|
|
|
|
// ShouldPurge is called by FindObsoleteFiles when doing a full scan,
|
|
// and db mutex (mutex_) should already be held.
|
|
// Actually, the current implementation of FindObsoleteFiles with
|
|
// full_scan=true can issue I/O requests to obtain list of files in
|
|
// directories, e.g. env_->getChildren while holding db mutex.
|
|
bool DBImpl::ShouldPurge(uint64_t file_number) const {
|
|
return files_grabbed_for_purge_.find(file_number) ==
|
|
files_grabbed_for_purge_.end() &&
|
|
purge_files_.find(file_number) == purge_files_.end();
|
|
}
|
|
|
|
// MarkAsGrabbedForPurge is called by FindObsoleteFiles, and db mutex
|
|
// (mutex_) should already be held.
|
|
void DBImpl::MarkAsGrabbedForPurge(uint64_t file_number) {
|
|
files_grabbed_for_purge_.insert(file_number);
|
|
}
|
|
|
|
void DBImpl::SetSnapshotChecker(SnapshotChecker* snapshot_checker) {
|
|
InstrumentedMutexLock l(&mutex_);
|
|
// snapshot_checker_ should only set once. If we need to set it multiple
|
|
// times, we need to make sure the old one is not deleted while it is still
|
|
// using by a compaction job.
|
|
assert(!snapshot_checker_);
|
|
snapshot_checker_.reset(snapshot_checker);
|
|
}
|
|
|
|
void DBImpl::GetSnapshotContext(
|
|
JobContext* job_context, std::vector<SequenceNumber>* snapshot_seqs,
|
|
SequenceNumber* earliest_write_conflict_snapshot,
|
|
SnapshotChecker** snapshot_checker_ptr) {
|
|
mutex_.AssertHeld();
|
|
assert(job_context != nullptr);
|
|
assert(snapshot_seqs != nullptr);
|
|
assert(earliest_write_conflict_snapshot != nullptr);
|
|
assert(snapshot_checker_ptr != nullptr);
|
|
|
|
*snapshot_checker_ptr = snapshot_checker_.get();
|
|
if (use_custom_gc_ && *snapshot_checker_ptr == nullptr) {
|
|
*snapshot_checker_ptr = DisableGCSnapshotChecker::Instance();
|
|
}
|
|
if (*snapshot_checker_ptr != nullptr) {
|
|
// If snapshot_checker is used, that means the flush/compaction may
|
|
// contain values not visible to snapshot taken after
|
|
// flush/compaction job starts. Take a snapshot and it will appear
|
|
// in snapshot_seqs and force compaction iterator to consider such
|
|
// snapshots.
|
|
const Snapshot* job_snapshot =
|
|
GetSnapshotImpl(false /*write_conflict_boundary*/, false /*lock*/);
|
|
job_context->job_snapshot.reset(new ManagedSnapshot(this, job_snapshot));
|
|
}
|
|
*snapshot_seqs = snapshots_.GetAll(earliest_write_conflict_snapshot);
|
|
}
|
|
} // namespace ROCKSDB_NAMESPACE
|