// Copyright (c) 2011-present, Facebook, Inc. All rights reserved. // This source code is licensed under both the GPLv2 (found in the // COPYING file in the root directory) and Apache 2.0 License // (found in the LICENSE.Apache file in the root directory). // // Copyright (c) 2011 The LevelDB Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. See the AUTHORS file for names of contributors. #include "db/compaction/compaction_job.h" #include #include #include #include #include #include #include #include "db/blob/blob_counting_iterator.h" #include "db/blob/blob_file_addition.h" #include "db/blob/blob_file_builder.h" #include "db/builder.h" #include "db/compaction/clipping_iterator.h" #include "db/compaction/compaction_state.h" #include "db/db_impl/db_impl.h" #include "db/dbformat.h" #include "db/error_handler.h" #include "db/event_helpers.h" #include "db/history_trimming_iterator.h" #include "db/log_writer.h" #include "db/merge_helper.h" #include "db/range_del_aggregator.h" #include "db/version_edit.h" #include "db/version_set.h" #include "file/filename.h" #include "file/read_write_util.h" #include "file/sst_file_manager_impl.h" #include "file/writable_file_writer.h" #include "logging/log_buffer.h" #include "logging/logging.h" #include "monitoring/iostats_context_imp.h" #include "monitoring/thread_status_util.h" #include "options/configurable_helper.h" #include "options/options_helper.h" #include "port/port.h" #include "rocksdb/db.h" #include "rocksdb/env.h" #include "rocksdb/options.h" #include "rocksdb/statistics.h" #include "rocksdb/status.h" #include "rocksdb/table.h" #include "rocksdb/utilities/options_type.h" #include "table/merging_iterator.h" #include "table/table_builder.h" #include "table/unique_id_impl.h" #include "test_util/sync_point.h" #include "util/stop_watch.h" namespace ROCKSDB_NAMESPACE { const char* GetCompactionReasonString(CompactionReason compaction_reason) { switch (compaction_reason) { case CompactionReason::kUnknown: return "Unknown"; case CompactionReason::kLevelL0FilesNum: return "LevelL0FilesNum"; case CompactionReason::kLevelMaxLevelSize: return "LevelMaxLevelSize"; case CompactionReason::kUniversalSizeAmplification: return "UniversalSizeAmplification"; case CompactionReason::kUniversalSizeRatio: return "UniversalSizeRatio"; case CompactionReason::kUniversalSortedRunNum: return "UniversalSortedRunNum"; case CompactionReason::kFIFOMaxSize: return "FIFOMaxSize"; case CompactionReason::kFIFOReduceNumFiles: return "FIFOReduceNumFiles"; case CompactionReason::kFIFOTtl: return "FIFOTtl"; case CompactionReason::kManualCompaction: return "ManualCompaction"; case CompactionReason::kFilesMarkedForCompaction: return "FilesMarkedForCompaction"; case CompactionReason::kBottommostFiles: return "BottommostFiles"; case CompactionReason::kTtl: return "Ttl"; case CompactionReason::kFlush: return "Flush"; case CompactionReason::kExternalSstIngestion: return "ExternalSstIngestion"; case CompactionReason::kPeriodicCompaction: return "PeriodicCompaction"; case CompactionReason::kChangeTemperature: return "ChangeTemperature"; case CompactionReason::kForcedBlobGC: return "ForcedBlobGC"; case CompactionReason::kRoundRobinTtl: return "RoundRobinTtl"; case CompactionReason::kRefitLevel: return "RefitLevel"; case CompactionReason::kNumOfReasons: // fall through default: assert(false); return "Invalid"; } } const char* GetCompactionPenultimateOutputRangeTypeString( Compaction::PenultimateOutputRangeType range_type) { switch (range_type) { case Compaction::PenultimateOutputRangeType::kNotSupported: return "NotSupported"; case Compaction::PenultimateOutputRangeType::kFullRange: return "FullRange"; case Compaction::PenultimateOutputRangeType::kNonLastRange: return "NonLastRange"; case Compaction::PenultimateOutputRangeType::kDisabled: return "Disabled"; default: assert(false); return "Invalid"; } } CompactionJob::CompactionJob( int job_id, Compaction* compaction, const ImmutableDBOptions& db_options, const MutableDBOptions& mutable_db_options, const FileOptions& file_options, VersionSet* versions, const std::atomic* shutting_down, LogBuffer* log_buffer, FSDirectory* db_directory, FSDirectory* output_directory, FSDirectory* blob_output_directory, Statistics* stats, InstrumentedMutex* db_mutex, ErrorHandler* db_error_handler, std::vector existing_snapshots, SequenceNumber earliest_write_conflict_snapshot, const SnapshotChecker* snapshot_checker, JobContext* job_context, std::shared_ptr table_cache, EventLogger* event_logger, bool paranoid_file_checks, bool measure_io_stats, const std::string& dbname, CompactionJobStats* compaction_job_stats, Env::Priority thread_pri, const std::shared_ptr& io_tracer, const std::atomic& manual_compaction_canceled, const std::string& db_id, const std::string& db_session_id, std::string full_history_ts_low, std::string trim_ts, BlobFileCompletionCallback* blob_callback, int* bg_compaction_scheduled, int* bg_bottom_compaction_scheduled) : compact_(new CompactionState(compaction)), compaction_stats_(compaction->compaction_reason(), 1), db_options_(db_options), mutable_db_options_copy_(mutable_db_options), log_buffer_(log_buffer), output_directory_(output_directory), stats_(stats), bottommost_level_(false), write_hint_(Env::WLTH_NOT_SET), compaction_job_stats_(compaction_job_stats), job_id_(job_id), dbname_(dbname), db_id_(db_id), db_session_id_(db_session_id), file_options_(file_options), env_(db_options.env), io_tracer_(io_tracer), fs_(db_options.fs, io_tracer), file_options_for_read_( fs_->OptimizeForCompactionTableRead(file_options, db_options_)), versions_(versions), shutting_down_(shutting_down), manual_compaction_canceled_(manual_compaction_canceled), db_directory_(db_directory), blob_output_directory_(blob_output_directory), db_mutex_(db_mutex), db_error_handler_(db_error_handler), existing_snapshots_(std::move(existing_snapshots)), earliest_snapshot_(existing_snapshots_.empty() ? kMaxSequenceNumber : existing_snapshots_.at(0)), earliest_write_conflict_snapshot_(earliest_write_conflict_snapshot), snapshot_checker_(snapshot_checker), job_context_(job_context), table_cache_(std::move(table_cache)), event_logger_(event_logger), paranoid_file_checks_(paranoid_file_checks), measure_io_stats_(measure_io_stats), thread_pri_(thread_pri), full_history_ts_low_(std::move(full_history_ts_low)), trim_ts_(std::move(trim_ts)), blob_callback_(blob_callback), extra_num_subcompaction_threads_reserved_(0), bg_compaction_scheduled_(bg_compaction_scheduled), bg_bottom_compaction_scheduled_(bg_bottom_compaction_scheduled) { assert(compaction_job_stats_ != nullptr); assert(log_buffer_ != nullptr); const auto* cfd = compact_->compaction->column_family_data(); ThreadStatusUtil::SetEnableTracking(db_options_.enable_thread_tracking); ThreadStatusUtil::SetColumnFamily(cfd); ThreadStatusUtil::SetThreadOperation(ThreadStatus::OP_COMPACTION); ReportStartedCompaction(compaction); } CompactionJob::~CompactionJob() { assert(compact_ == nullptr); ThreadStatusUtil::ResetThreadStatus(); } void CompactionJob::ReportStartedCompaction(Compaction* compaction) { ThreadStatusUtil::SetThreadOperationProperty(ThreadStatus::COMPACTION_JOB_ID, job_id_); ThreadStatusUtil::SetThreadOperationProperty( ThreadStatus::COMPACTION_INPUT_OUTPUT_LEVEL, (static_cast(compact_->compaction->start_level()) << 32) + compact_->compaction->output_level()); // In the current design, a CompactionJob is always created // for non-trivial compaction. assert(compaction->IsTrivialMove() == false || compaction->is_manual_compaction() == true); ThreadStatusUtil::SetThreadOperationProperty( ThreadStatus::COMPACTION_PROP_FLAGS, compaction->is_manual_compaction() + (compaction->deletion_compaction() << 1)); ThreadStatusUtil::SetThreadOperationProperty( ThreadStatus::COMPACTION_TOTAL_INPUT_BYTES, compaction->CalculateTotalInputSize()); IOSTATS_RESET(bytes_written); IOSTATS_RESET(bytes_read); ThreadStatusUtil::SetThreadOperationProperty( ThreadStatus::COMPACTION_BYTES_WRITTEN, 0); ThreadStatusUtil::SetThreadOperationProperty( ThreadStatus::COMPACTION_BYTES_READ, 0); // Set the thread operation after operation properties // to ensure GetThreadList() can always show them all together. ThreadStatusUtil::SetThreadOperation(ThreadStatus::OP_COMPACTION); compaction_job_stats_->is_manual_compaction = compaction->is_manual_compaction(); compaction_job_stats_->is_full_compaction = compaction->is_full_compaction(); } void CompactionJob::Prepare() { AutoThreadOperationStageUpdater stage_updater( ThreadStatus::STAGE_COMPACTION_PREPARE); // Generate file_levels_ for compaction before making Iterator auto* c = compact_->compaction; [[maybe_unused]] ColumnFamilyData* cfd = c->column_family_data(); assert(cfd != nullptr); const VersionStorageInfo* storage_info = c->input_version()->storage_info(); assert(storage_info); assert(storage_info->NumLevelFiles(compact_->compaction->level()) > 0); write_hint_ = storage_info->CalculateSSTWriteHint(c->output_level()); bottommost_level_ = c->bottommost_level(); if (c->ShouldFormSubcompactions()) { StopWatch sw(db_options_.clock, stats_, SUBCOMPACTION_SETUP_TIME); GenSubcompactionBoundaries(); } if (boundaries_.size() >= 1) { for (size_t i = 0; i <= boundaries_.size(); i++) { compact_->sub_compact_states.emplace_back( c, (i != 0) ? std::optional(boundaries_[i - 1]) : std::nullopt, (i != boundaries_.size()) ? std::optional(boundaries_[i]) : std::nullopt, static_cast(i)); // assert to validate that boundaries don't have same user keys (without // timestamp part). assert(i == 0 || i == boundaries_.size() || cfd->user_comparator()->CompareWithoutTimestamp( boundaries_[i - 1], boundaries_[i]) < 0); } RecordInHistogram(stats_, NUM_SUBCOMPACTIONS_SCHEDULED, compact_->sub_compact_states.size()); } else { compact_->sub_compact_states.emplace_back(c, std::nullopt, std::nullopt, /*sub_job_id*/ 0); } // collect all seqno->time information from the input files which will be used // to encode seqno->time to the output files. uint64_t preserve_time_duration = std::max(c->immutable_options()->preserve_internal_time_seconds, c->immutable_options()->preclude_last_level_data_seconds); if (preserve_time_duration > 0) { const ReadOptions read_options(Env::IOActivity::kCompaction); // Setup seqno_to_time_mapping_ with relevant time range. seqno_to_time_mapping_.SetMaxTimeSpan(preserve_time_duration); for (const auto& each_level : *c->inputs()) { for (const auto& fmd : each_level.files) { std::shared_ptr tp; Status s = c->input_version()->GetTableProperties(read_options, &tp, fmd, nullptr); if (s.ok()) { s = seqno_to_time_mapping_.DecodeFrom(tp->seqno_to_time_mapping); } if (!s.ok()) { ROCKS_LOG_WARN( db_options_.info_log, "Problem reading or processing seqno-to-time mapping: %s", s.ToString().c_str()); } } } int64_t _current_time = 0; Status s = db_options_.clock->GetCurrentTime(&_current_time); if (!s.ok()) { ROCKS_LOG_WARN(db_options_.info_log, "Failed to get current time in compaction: Status: %s", s.ToString().c_str()); // preserve all time information preserve_time_min_seqno_ = 0; preclude_last_level_min_seqno_ = 0; seqno_to_time_mapping_.Enforce(); } else { seqno_to_time_mapping_.Enforce(_current_time); seqno_to_time_mapping_.GetCurrentTieringCutoffSeqnos( static_cast(_current_time), c->immutable_options()->preserve_internal_time_seconds, c->immutable_options()->preclude_last_level_data_seconds, &preserve_time_min_seqno_, &preclude_last_level_min_seqno_); } // For accuracy of the GetProximalSeqnoBeforeTime queries above, we only // limit the capacity after them. // Here If we set capacity to the per-SST limit, we could be throwing away // fidelity when a compaction output file has a narrower seqno range than // all the inputs. If we only limit capacity for each compaction output, we // could be doing a lot of unnecessary recomputation in a large compaction // (up to quadratic in number of files). Thus, we do soemthing in the // middle: enforce a resonably large constant size limit substantially // larger than kMaxSeqnoTimePairsPerSST. seqno_to_time_mapping_.SetCapacity(kMaxSeqnoToTimeEntries); } } uint64_t CompactionJob::GetSubcompactionsLimit() { return extra_num_subcompaction_threads_reserved_ + std::max( std::uint64_t(1), static_cast(compact_->compaction->max_subcompactions())); } void CompactionJob::AcquireSubcompactionResources( int num_extra_required_subcompactions) { TEST_SYNC_POINT("CompactionJob::AcquireSubcompactionResources:0"); TEST_SYNC_POINT("CompactionJob::AcquireSubcompactionResources:1"); int max_db_compactions = DBImpl::GetBGJobLimits( mutable_db_options_copy_.max_background_flushes, mutable_db_options_copy_.max_background_compactions, mutable_db_options_copy_.max_background_jobs, versions_->GetColumnFamilySet() ->write_controller() ->NeedSpeedupCompaction()) .max_compactions; InstrumentedMutexLock l(db_mutex_); // Apply min function first since We need to compute the extra subcompaction // against compaction limits. And then try to reserve threads for extra // subcompactions. The actual number of reserved threads could be less than // the desired number. int available_bg_compactions_against_db_limit = std::max(max_db_compactions - *bg_compaction_scheduled_ - *bg_bottom_compaction_scheduled_, 0); // Reservation only supports backgrdoun threads of which the priority is // between BOTTOM and HIGH. Need to degrade the priority to HIGH if the // origin thread_pri_ is higher than that. Similar to ReleaseThreads(). extra_num_subcompaction_threads_reserved_ = env_->ReserveThreads(std::min(num_extra_required_subcompactions, available_bg_compactions_against_db_limit), std::min(thread_pri_, Env::Priority::HIGH)); // Update bg_compaction_scheduled_ or bg_bottom_compaction_scheduled_ // depending on if this compaction has the bottommost priority if (thread_pri_ == Env::Priority::BOTTOM) { *bg_bottom_compaction_scheduled_ += extra_num_subcompaction_threads_reserved_; } else { *bg_compaction_scheduled_ += extra_num_subcompaction_threads_reserved_; } } void CompactionJob::ShrinkSubcompactionResources(uint64_t num_extra_resources) { // Do nothing when we have zero resources to shrink if (num_extra_resources == 0) { return; } db_mutex_->Lock(); // We cannot release threads more than what we reserved before int extra_num_subcompaction_threads_released = env_->ReleaseThreads( (int)num_extra_resources, std::min(thread_pri_, Env::Priority::HIGH)); // Update the number of reserved threads and the number of background // scheduled compactions for this compaction job extra_num_subcompaction_threads_reserved_ -= extra_num_subcompaction_threads_released; // TODO (zichen): design a test case with new subcompaction partitioning // when the number of actual partitions is less than the number of planned // partitions assert(extra_num_subcompaction_threads_released == (int)num_extra_resources); // Update bg_compaction_scheduled_ or bg_bottom_compaction_scheduled_ // depending on if this compaction has the bottommost priority if (thread_pri_ == Env::Priority::BOTTOM) { *bg_bottom_compaction_scheduled_ -= extra_num_subcompaction_threads_released; } else { *bg_compaction_scheduled_ -= extra_num_subcompaction_threads_released; } db_mutex_->Unlock(); TEST_SYNC_POINT("CompactionJob::ShrinkSubcompactionResources:0"); } void CompactionJob::ReleaseSubcompactionResources() { if (extra_num_subcompaction_threads_reserved_ == 0) { return; } { InstrumentedMutexLock l(db_mutex_); // The number of reserved threads becomes larger than 0 only if the // compaction prioity is round robin and there is no sufficient // sub-compactions available // The scheduled compaction must be no less than 1 + extra number // subcompactions using acquired resources since this compaction job has not // finished yet assert(*bg_bottom_compaction_scheduled_ >= 1 + extra_num_subcompaction_threads_reserved_ || *bg_compaction_scheduled_ >= 1 + extra_num_subcompaction_threads_reserved_); } ShrinkSubcompactionResources(extra_num_subcompaction_threads_reserved_); } void CompactionJob::GenSubcompactionBoundaries() { // The goal is to find some boundary keys so that we can evenly partition // the compaction input data into max_subcompactions ranges. // For every input file, we ask TableReader to estimate 128 anchor points // that evenly partition the input file into 128 ranges and the range // sizes. This can be calculated by scanning index blocks of the file. // Once we have the anchor points for all the input files, we merge them // together and try to find keys dividing ranges evenly. // For example, if we have two input files, and each returns following // ranges: // File1: (a1, 1000), (b1, 1200), (c1, 1100) // File2: (a2, 1100), (b2, 1000), (c2, 1000) // We total sort the keys to following: // (a1, 1000), (a2, 1100), (b1, 1200), (b2, 1000), (c1, 1100), (c2, 1000) // We calculate the total size by adding up all ranges' size, which is 6400. // If we would like to partition into 2 subcompactions, the target of the // range size is 3200. Based on the size, we take "b1" as the partition key // since the first three ranges would hit 3200. // // Note that the ranges are actually overlapping. For example, in the example // above, the range ending with "b1" is overlapping with the range ending with // "b2". So the size 1000+1100+1200 is an underestimation of data size up to // "b1". In extreme cases where we only compact N L0 files, a range can // overlap with N-1 other ranges. Since we requested a relatively large number // (128) of ranges from each input files, even N range overlapping would // cause relatively small inaccuracy. ReadOptions read_options(Env::IOActivity::kCompaction); read_options.rate_limiter_priority = GetRateLimiterPriority(); auto* c = compact_->compaction; if (c->immutable_options()->table_factory->Name() == TableFactory::kPlainTableName()) { return; } if (c->max_subcompactions() <= 1 && !(c->immutable_options()->compaction_pri == kRoundRobin && c->immutable_options()->compaction_style == kCompactionStyleLevel)) { return; } auto* cfd = c->column_family_data(); const Comparator* cfd_comparator = cfd->user_comparator(); const InternalKeyComparator& icomp = cfd->internal_comparator(); auto* v = compact_->compaction->input_version(); int base_level = v->storage_info()->base_level(); InstrumentedMutexUnlock unlock_guard(db_mutex_); uint64_t total_size = 0; std::vector all_anchors; int start_lvl = c->start_level(); int out_lvl = c->output_level(); for (size_t lvl_idx = 0; lvl_idx < c->num_input_levels(); lvl_idx++) { int lvl = c->level(lvl_idx); if (lvl >= start_lvl && lvl <= out_lvl) { const LevelFilesBrief* flevel = c->input_levels(lvl_idx); size_t num_files = flevel->num_files; if (num_files == 0) { continue; } for (size_t i = 0; i < num_files; i++) { FileMetaData* f = flevel->files[i].file_metadata; std::vector my_anchors; Status s = cfd->table_cache()->ApproximateKeyAnchors( read_options, icomp, *f, c->mutable_cf_options()->block_protection_bytes_per_key, my_anchors); if (!s.ok() || my_anchors.empty()) { my_anchors.emplace_back(f->largest.user_key(), f->fd.GetFileSize()); } for (auto& ac : my_anchors) { // Can be optimize to avoid this loop. total_size += ac.range_size; } all_anchors.insert(all_anchors.end(), my_anchors.begin(), my_anchors.end()); } } } // Here we total sort all the anchor points across all files and go through // them in the sorted order to find partitioning boundaries. // Not the most efficient implementation. A much more efficient algorithm // probably exists. But they are more complex. If performance turns out to // be a problem, we can optimize. std::sort( all_anchors.begin(), all_anchors.end(), [cfd_comparator](TableReader::Anchor& a, TableReader::Anchor& b) -> bool { return cfd_comparator->CompareWithoutTimestamp(a.user_key, b.user_key) < 0; }); // Remove duplicated entries from boundaries. all_anchors.erase( std::unique(all_anchors.begin(), all_anchors.end(), [cfd_comparator](TableReader::Anchor& a, TableReader::Anchor& b) -> bool { return cfd_comparator->CompareWithoutTimestamp( a.user_key, b.user_key) == 0; }), all_anchors.end()); // Get the number of planned subcompactions, may update reserve threads // and update extra_num_subcompaction_threads_reserved_ for round-robin uint64_t num_planned_subcompactions; if (c->immutable_options()->compaction_pri == kRoundRobin && c->immutable_options()->compaction_style == kCompactionStyleLevel) { // For round-robin compaction prioity, we need to employ more // subcompactions (may exceed the max_subcompaction limit). The extra // subcompactions will be executed using reserved threads and taken into // account bg_compaction_scheduled or bg_bottom_compaction_scheduled. // Initialized by the number of input files num_planned_subcompactions = static_cast(c->num_input_files(0)); uint64_t max_subcompactions_limit = GetSubcompactionsLimit(); if (max_subcompactions_limit < num_planned_subcompactions) { // Assert two pointers are not empty so that we can use extra // subcompactions against db compaction limits assert(bg_bottom_compaction_scheduled_ != nullptr); assert(bg_compaction_scheduled_ != nullptr); // Reserve resources when max_subcompaction is not sufficient AcquireSubcompactionResources( (int)(num_planned_subcompactions - max_subcompactions_limit)); // Subcompactions limit changes after acquiring additional resources. // Need to call GetSubcompactionsLimit() again to update the number // of planned subcompactions num_planned_subcompactions = std::min(num_planned_subcompactions, GetSubcompactionsLimit()); } else { num_planned_subcompactions = max_subcompactions_limit; } } else { num_planned_subcompactions = GetSubcompactionsLimit(); } TEST_SYNC_POINT_CALLBACK("CompactionJob::GenSubcompactionBoundaries:0", &num_planned_subcompactions); if (num_planned_subcompactions == 1) { return; } // Group the ranges into subcompactions uint64_t target_range_size = std::max( total_size / num_planned_subcompactions, MaxFileSizeForLevel( *(c->mutable_cf_options()), out_lvl, c->immutable_options()->compaction_style, base_level, c->immutable_options()->level_compaction_dynamic_level_bytes)); if (target_range_size >= total_size) { return; } uint64_t next_threshold = target_range_size; uint64_t cumulative_size = 0; uint64_t num_actual_subcompactions = 1U; for (TableReader::Anchor& anchor : all_anchors) { cumulative_size += anchor.range_size; if (cumulative_size > next_threshold) { next_threshold += target_range_size; num_actual_subcompactions++; boundaries_.push_back(anchor.user_key); } if (num_actual_subcompactions == num_planned_subcompactions) { break; } } TEST_SYNC_POINT_CALLBACK("CompactionJob::GenSubcompactionBoundaries:1", &num_actual_subcompactions); // Shrink extra subcompactions resources when extra resrouces are acquired ShrinkSubcompactionResources( std::min((int)(num_planned_subcompactions - num_actual_subcompactions), extra_num_subcompaction_threads_reserved_)); } Status CompactionJob::Run() { AutoThreadOperationStageUpdater stage_updater( ThreadStatus::STAGE_COMPACTION_RUN); TEST_SYNC_POINT("CompactionJob::Run():Start"); log_buffer_->FlushBufferToLog(); LogCompaction(); const size_t num_threads = compact_->sub_compact_states.size(); assert(num_threads > 0); const uint64_t start_micros = db_options_.clock->NowMicros(); compact_->compaction->GetOrInitInputTableProperties(); // Launch a thread for each of subcompactions 1...num_threads-1 std::vector thread_pool; thread_pool.reserve(num_threads - 1); for (size_t i = 1; i < compact_->sub_compact_states.size(); i++) { thread_pool.emplace_back(&CompactionJob::ProcessKeyValueCompaction, this, &compact_->sub_compact_states[i]); } // Always schedule the first subcompaction (whether or not there are also // others) in the current thread to be efficient with resources ProcessKeyValueCompaction(compact_->sub_compact_states.data()); // Wait for all other threads (if there are any) to finish execution for (auto& thread : thread_pool) { thread.join(); } compaction_stats_.SetMicros(db_options_.clock->NowMicros() - start_micros); for (auto& state : compact_->sub_compact_states) { compaction_stats_.AddCpuMicros(state.compaction_job_stats.cpu_micros); state.RemoveLastEmptyOutput(); } RecordTimeToHistogram(stats_, COMPACTION_TIME, compaction_stats_.stats.micros); RecordTimeToHistogram(stats_, COMPACTION_CPU_TIME, compaction_stats_.stats.cpu_micros); TEST_SYNC_POINT("CompactionJob::Run:BeforeVerify"); // Check if any thread encountered an error during execution Status status; IOStatus io_s; bool wrote_new_blob_files = false; for (const auto& state : compact_->sub_compact_states) { if (!state.status.ok()) { status = state.status; io_s = state.io_status; break; } if (state.Current().HasBlobFileAdditions()) { wrote_new_blob_files = true; } } if (io_status_.ok()) { io_status_ = io_s; } if (status.ok()) { constexpr IODebugContext* dbg = nullptr; if (output_directory_) { io_s = output_directory_->FsyncWithDirOptions( IOOptions(), dbg, DirFsyncOptions(DirFsyncOptions::FsyncReason::kNewFileSynced)); } if (io_s.ok() && wrote_new_blob_files && blob_output_directory_ && blob_output_directory_ != output_directory_) { io_s = blob_output_directory_->FsyncWithDirOptions( IOOptions(), dbg, DirFsyncOptions(DirFsyncOptions::FsyncReason::kNewFileSynced)); } } if (io_status_.ok()) { io_status_ = io_s; } if (status.ok()) { status = io_s; } if (status.ok()) { thread_pool.clear(); std::vector files_output; for (const auto& state : compact_->sub_compact_states) { for (const auto& output : state.GetOutputs()) { files_output.emplace_back(&output); } } ColumnFamilyData* cfd = compact_->compaction->column_family_data(); auto& prefix_extractor = compact_->compaction->mutable_cf_options()->prefix_extractor; std::atomic next_file_idx(0); auto verify_table = [&](Status& output_status) { while (true) { size_t file_idx = next_file_idx.fetch_add(1); if (file_idx >= files_output.size()) { break; } // Verify that the table is usable // We set for_compaction to false and don't // OptimizeForCompactionTableRead here because this is a special case // after we finish the table building No matter whether // use_direct_io_for_flush_and_compaction is true, we will regard this // verification as user reads since the goal is to cache it here for // further user reads ReadOptions verify_table_read_options(Env::IOActivity::kCompaction); verify_table_read_options.rate_limiter_priority = GetRateLimiterPriority(); InternalIterator* iter = cfd->table_cache()->NewIterator( verify_table_read_options, file_options_, cfd->internal_comparator(), files_output[file_idx]->meta, /*range_del_agg=*/nullptr, prefix_extractor, /*table_reader_ptr=*/nullptr, cfd->internal_stats()->GetFileReadHist( compact_->compaction->output_level()), TableReaderCaller::kCompactionRefill, /*arena=*/nullptr, /*skip_filters=*/false, compact_->compaction->output_level(), MaxFileSizeForL0MetaPin( *compact_->compaction->mutable_cf_options()), /*smallest_compaction_key=*/nullptr, /*largest_compaction_key=*/nullptr, /*allow_unprepared_value=*/false, compact_->compaction->mutable_cf_options() ->block_protection_bytes_per_key); auto s = iter->status(); if (s.ok() && paranoid_file_checks_) { OutputValidator validator(cfd->internal_comparator(), /*_enable_hash=*/true); for (iter->SeekToFirst(); iter->Valid(); iter->Next()) { s = validator.Add(iter->key(), iter->value()); if (!s.ok()) { break; } } if (s.ok()) { s = iter->status(); } if (s.ok() && !validator.CompareValidator(files_output[file_idx]->validator)) { s = Status::Corruption("Paranoid checksums do not match"); } } delete iter; if (!s.ok()) { output_status = s; break; } } }; for (size_t i = 1; i < compact_->sub_compact_states.size(); i++) { thread_pool.emplace_back( verify_table, std::ref(compact_->sub_compact_states[i].status)); } verify_table(compact_->sub_compact_states[0].status); for (auto& thread : thread_pool) { thread.join(); } for (const auto& state : compact_->sub_compact_states) { if (!state.status.ok()) { status = state.status; break; } } } ReleaseSubcompactionResources(); TEST_SYNC_POINT("CompactionJob::ReleaseSubcompactionResources:0"); TEST_SYNC_POINT("CompactionJob::ReleaseSubcompactionResources:1"); TablePropertiesCollection tp; for (const auto& state : compact_->sub_compact_states) { for (const auto& output : state.GetOutputs()) { auto fn = TableFileName(state.compaction->immutable_options()->cf_paths, output.meta.fd.GetNumber(), output.meta.fd.GetPathId()); compact_->compaction->SetOutputTableProperties(fn, output.table_properties); } } // Finish up all bookkeeping to unify the subcompaction results. compact_->AggregateCompactionStats(compaction_stats_, *compaction_job_stats_); uint64_t num_input_range_del = 0; bool ok = UpdateCompactionStats(&num_input_range_del); // (Sub)compactions returned ok, do sanity check on the number of input keys. if (status.ok() && ok && compaction_job_stats_->has_num_input_records) { size_t ts_sz = compact_->compaction->column_family_data() ->user_comparator() ->timestamp_size(); // When trim_ts_ is non-empty, CompactionIterator takes // HistoryTrimmingIterator as input iterator and sees a trimmed view of // input keys. So the number of keys it processed is not suitable for // verification here. // TODO: support verification when trim_ts_ is non-empty. if (!(ts_sz > 0 && !trim_ts_.empty())) { assert(compaction_stats_.stats.num_input_records > 0); // TODO: verify the number of range deletion entries. uint64_t expected = compaction_stats_.stats.num_input_records - num_input_range_del; uint64_t actual = compaction_job_stats_->num_input_records; if (expected != actual) { char scratch[2345]; compact_->compaction->Summary(scratch, sizeof(scratch)); std::string msg = "Compaction number of input keys does not match " "number of keys processed. Expected " + std::to_string(expected) + " but processed " + std::to_string(actual) + ". Compaction summary: " + scratch; ROCKS_LOG_WARN( db_options_.info_log, "[%s] [JOB %d] Compaction with status: %s", compact_->compaction->column_family_data()->GetName().c_str(), job_context_->job_id, msg.c_str()); if (db_options_.compaction_verify_record_count) { status = Status::Corruption(msg); } } } } RecordCompactionIOStats(); LogFlush(db_options_.info_log); TEST_SYNC_POINT("CompactionJob::Run():End"); compact_->status = status; TEST_SYNC_POINT_CALLBACK("CompactionJob::Run():EndStatusSet", &status); return status; } Status CompactionJob::Install(const MutableCFOptions& mutable_cf_options, bool* compaction_released) { assert(compact_); AutoThreadOperationStageUpdater stage_updater( ThreadStatus::STAGE_COMPACTION_INSTALL); db_mutex_->AssertHeld(); Status status = compact_->status; ColumnFamilyData* cfd = compact_->compaction->column_family_data(); assert(cfd); int output_level = compact_->compaction->output_level(); cfd->internal_stats()->AddCompactionStats(output_level, thread_pri_, compaction_stats_); if (status.ok()) { status = InstallCompactionResults(mutable_cf_options, compaction_released); } if (!versions_->io_status().ok()) { io_status_ = versions_->io_status(); } VersionStorageInfo::LevelSummaryStorage tmp; auto vstorage = cfd->current()->storage_info(); const auto& stats = compaction_stats_.stats; double read_write_amp = 0.0; double write_amp = 0.0; double bytes_read_per_sec = 0; double bytes_written_per_sec = 0; const uint64_t bytes_read_non_output_and_blob = stats.bytes_read_non_output_levels + stats.bytes_read_blob; const uint64_t bytes_read_all = stats.bytes_read_output_level + bytes_read_non_output_and_blob; const uint64_t bytes_written_all = stats.bytes_written + stats.bytes_written_blob; if (bytes_read_non_output_and_blob > 0) { read_write_amp = (bytes_written_all + bytes_read_all) / static_cast(bytes_read_non_output_and_blob); write_amp = bytes_written_all / static_cast(bytes_read_non_output_and_blob); } if (stats.micros > 0) { bytes_read_per_sec = bytes_read_all / static_cast(stats.micros); bytes_written_per_sec = bytes_written_all / static_cast(stats.micros); } const std::string& column_family_name = cfd->GetName(); constexpr double kMB = 1048576.0; ROCKS_LOG_BUFFER( log_buffer_, "[%s] compacted to: %s, MB/sec: %.1f rd, %.1f wr, level %d, " "files in(%d, %d) out(%d +%d blob) " "MB in(%.1f, %.1f +%.1f blob) out(%.1f +%.1f blob), " "read-write-amplify(%.1f) write-amplify(%.1f) %s, records in: %" PRIu64 ", records dropped: %" PRIu64 " output_compression: %s\n", column_family_name.c_str(), vstorage->LevelSummary(&tmp), bytes_read_per_sec, bytes_written_per_sec, compact_->compaction->output_level(), stats.num_input_files_in_non_output_levels, stats.num_input_files_in_output_level, stats.num_output_files, stats.num_output_files_blob, stats.bytes_read_non_output_levels / kMB, stats.bytes_read_output_level / kMB, stats.bytes_read_blob / kMB, stats.bytes_written / kMB, stats.bytes_written_blob / kMB, read_write_amp, write_amp, status.ToString().c_str(), stats.num_input_records, stats.num_dropped_records, CompressionTypeToString(compact_->compaction->output_compression()) .c_str()); const auto& blob_files = vstorage->GetBlobFiles(); if (!blob_files.empty()) { assert(blob_files.front()); assert(blob_files.back()); ROCKS_LOG_BUFFER( log_buffer_, "[%s] Blob file summary: head=%" PRIu64 ", tail=%" PRIu64 "\n", column_family_name.c_str(), blob_files.front()->GetBlobFileNumber(), blob_files.back()->GetBlobFileNumber()); } if (compaction_stats_.has_penultimate_level_output) { ROCKS_LOG_BUFFER( log_buffer_, "[%s] has Penultimate Level output: %" PRIu64 ", level %d, number of files: %" PRIu64 ", number of records: %" PRIu64, column_family_name.c_str(), compaction_stats_.penultimate_level_stats.bytes_written, compact_->compaction->GetPenultimateLevel(), compaction_stats_.penultimate_level_stats.num_output_files, compaction_stats_.penultimate_level_stats.num_output_records); } UpdateCompactionJobStats(stats); auto stream = event_logger_->LogToBuffer(log_buffer_, 8192); stream << "job" << job_id_ << "event" << "compaction_finished" << "compaction_time_micros" << stats.micros << "compaction_time_cpu_micros" << stats.cpu_micros << "output_level" << compact_->compaction->output_level() << "num_output_files" << stats.num_output_files << "total_output_size" << stats.bytes_written; if (stats.num_output_files_blob > 0) { stream << "num_blob_output_files" << stats.num_output_files_blob << "total_blob_output_size" << stats.bytes_written_blob; } stream << "num_input_records" << stats.num_input_records << "num_output_records" << stats.num_output_records << "num_subcompactions" << compact_->sub_compact_states.size() << "output_compression" << CompressionTypeToString(compact_->compaction->output_compression()); stream << "num_single_delete_mismatches" << compaction_job_stats_->num_single_del_mismatch; stream << "num_single_delete_fallthrough" << compaction_job_stats_->num_single_del_fallthru; if (measure_io_stats_) { stream << "file_write_nanos" << compaction_job_stats_->file_write_nanos; stream << "file_range_sync_nanos" << compaction_job_stats_->file_range_sync_nanos; stream << "file_fsync_nanos" << compaction_job_stats_->file_fsync_nanos; stream << "file_prepare_write_nanos" << compaction_job_stats_->file_prepare_write_nanos; } stream << "lsm_state"; stream.StartArray(); for (int level = 0; level < vstorage->num_levels(); ++level) { stream << vstorage->NumLevelFiles(level); } stream.EndArray(); if (!blob_files.empty()) { assert(blob_files.front()); stream << "blob_file_head" << blob_files.front()->GetBlobFileNumber(); assert(blob_files.back()); stream << "blob_file_tail" << blob_files.back()->GetBlobFileNumber(); } if (compaction_stats_.has_penultimate_level_output) { InternalStats::CompactionStats& pl_stats = compaction_stats_.penultimate_level_stats; stream << "penultimate_level_num_output_files" << pl_stats.num_output_files; stream << "penultimate_level_bytes_written" << pl_stats.bytes_written; stream << "penultimate_level_num_output_records" << pl_stats.num_output_records; stream << "penultimate_level_num_output_files_blob" << pl_stats.num_output_files_blob; stream << "penultimate_level_bytes_written_blob" << pl_stats.bytes_written_blob; } CleanupCompaction(); return status; } void CompactionJob::NotifyOnSubcompactionBegin( SubcompactionState* sub_compact) { Compaction* c = compact_->compaction; if (db_options_.listeners.empty()) { return; } if (shutting_down_->load(std::memory_order_acquire)) { return; } if (c->is_manual_compaction() && manual_compaction_canceled_.load(std::memory_order_acquire)) { return; } sub_compact->notify_on_subcompaction_completion = true; SubcompactionJobInfo info{}; sub_compact->BuildSubcompactionJobInfo(info); info.job_id = static_cast(job_id_); info.thread_id = env_->GetThreadID(); for (const auto& listener : db_options_.listeners) { listener->OnSubcompactionBegin(info); } info.status.PermitUncheckedError(); } void CompactionJob::NotifyOnSubcompactionCompleted( SubcompactionState* sub_compact) { if (db_options_.listeners.empty()) { return; } if (shutting_down_->load(std::memory_order_acquire)) { return; } if (sub_compact->notify_on_subcompaction_completion == false) { return; } SubcompactionJobInfo info{}; sub_compact->BuildSubcompactionJobInfo(info); info.job_id = static_cast(job_id_); info.thread_id = env_->GetThreadID(); for (const auto& listener : db_options_.listeners) { listener->OnSubcompactionCompleted(info); } } void CompactionJob::ProcessKeyValueCompaction(SubcompactionState* sub_compact) { assert(sub_compact); assert(sub_compact->compaction); if (db_options_.compaction_service) { CompactionServiceJobStatus comp_status = ProcessKeyValueCompactionWithCompactionService(sub_compact); if (comp_status == CompactionServiceJobStatus::kSuccess || comp_status == CompactionServiceJobStatus::kFailure) { return; } // fallback to local compaction assert(comp_status == CompactionServiceJobStatus::kUseLocal); } uint64_t prev_cpu_micros = db_options_.clock->CPUMicros(); ColumnFamilyData* cfd = sub_compact->compaction->column_family_data(); // Create compaction filter and fail the compaction if // IgnoreSnapshots() = false because it is not supported anymore const CompactionFilter* compaction_filter = cfd->ioptions()->compaction_filter; std::unique_ptr compaction_filter_from_factory = nullptr; if (compaction_filter == nullptr) { compaction_filter_from_factory = sub_compact->compaction->CreateCompactionFilter(); compaction_filter = compaction_filter_from_factory.get(); } if (compaction_filter != nullptr && !compaction_filter->IgnoreSnapshots()) { sub_compact->status = Status::NotSupported( "CompactionFilter::IgnoreSnapshots() = false is not supported " "anymore."); return; } NotifyOnSubcompactionBegin(sub_compact); auto range_del_agg = std::make_unique( &cfd->internal_comparator(), existing_snapshots_, &full_history_ts_low_, &trim_ts_); // TODO: since we already use C++17, should use // std::optional instead. const std::optional start = sub_compact->start; const std::optional end = sub_compact->end; std::optional start_without_ts; std::optional end_without_ts; ReadOptions read_options; read_options.verify_checksums = true; read_options.fill_cache = false; read_options.rate_limiter_priority = GetRateLimiterPriority(); read_options.io_activity = Env::IOActivity::kCompaction; // Compaction iterators shouldn't be confined to a single prefix. // Compactions use Seek() for // (a) concurrent compactions, // (b) CompactionFilter::Decision::kRemoveAndSkipUntil. read_options.total_order_seek = true; const WriteOptions write_options(Env::IOPriority::IO_LOW, Env::IOActivity::kCompaction); // Remove the timestamps from boundaries because boundaries created in // GenSubcompactionBoundaries doesn't strip away the timestamp. size_t ts_sz = cfd->user_comparator()->timestamp_size(); if (start.has_value()) { read_options.iterate_lower_bound = &(*start); if (ts_sz > 0) { start_without_ts = StripTimestampFromUserKey(*start, ts_sz); read_options.iterate_lower_bound = &(*start_without_ts); } } if (end.has_value()) { read_options.iterate_upper_bound = &(*end); if (ts_sz > 0) { end_without_ts = StripTimestampFromUserKey(*end, ts_sz); read_options.iterate_upper_bound = &(*end_without_ts); } } // Although the v2 aggregator is what the level iterator(s) know about, // the AddTombstones calls will be propagated down to the v1 aggregator. std::unique_ptr raw_input(versions_->MakeInputIterator( read_options, sub_compact->compaction, range_del_agg.get(), file_options_for_read_, start, end)); InternalIterator* input = raw_input.get(); IterKey start_ikey; IterKey end_ikey; Slice start_slice; Slice end_slice; Slice start_user_key{}; Slice end_user_key{}; static constexpr char kMaxTs[] = "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"; Slice ts_slice; std::string max_ts; if (ts_sz > 0) { if (ts_sz <= strlen(kMaxTs)) { ts_slice = Slice(kMaxTs, ts_sz); } else { max_ts = std::string(ts_sz, '\xff'); ts_slice = Slice(max_ts); } } if (start.has_value()) { start_ikey.SetInternalKey(*start, kMaxSequenceNumber, kValueTypeForSeek); if (ts_sz > 0) { start_ikey.UpdateInternalKey(kMaxSequenceNumber, kValueTypeForSeek, &ts_slice); } start_slice = start_ikey.GetInternalKey(); start_user_key = start_ikey.GetUserKey(); } if (end.has_value()) { end_ikey.SetInternalKey(*end, kMaxSequenceNumber, kValueTypeForSeek); if (ts_sz > 0) { end_ikey.UpdateInternalKey(kMaxSequenceNumber, kValueTypeForSeek, &ts_slice); } end_slice = end_ikey.GetInternalKey(); end_user_key = end_ikey.GetUserKey(); } std::unique_ptr clip; if (start.has_value() || end.has_value()) { clip = std::make_unique( raw_input.get(), start.has_value() ? &start_slice : nullptr, end.has_value() ? &end_slice : nullptr, &cfd->internal_comparator()); input = clip.get(); } std::unique_ptr blob_counter; if (sub_compact->compaction->DoesInputReferenceBlobFiles()) { BlobGarbageMeter* meter = sub_compact->Current().CreateBlobGarbageMeter(); blob_counter = std::make_unique(input, meter); input = blob_counter.get(); } std::unique_ptr trim_history_iter; if (ts_sz > 0 && !trim_ts_.empty()) { trim_history_iter = std::make_unique( input, cfd->user_comparator(), trim_ts_); input = trim_history_iter.get(); } input->SeekToFirst(); AutoThreadOperationStageUpdater stage_updater( ThreadStatus::STAGE_COMPACTION_PROCESS_KV); // I/O measurement variables PerfLevel prev_perf_level = PerfLevel::kEnableTime; const uint64_t kRecordStatsEvery = 1000; uint64_t prev_write_nanos = 0; uint64_t prev_fsync_nanos = 0; uint64_t prev_range_sync_nanos = 0; uint64_t prev_prepare_write_nanos = 0; uint64_t prev_cpu_write_nanos = 0; uint64_t prev_cpu_read_nanos = 0; if (measure_io_stats_) { prev_perf_level = GetPerfLevel(); SetPerfLevel(PerfLevel::kEnableTimeAndCPUTimeExceptForMutex); prev_write_nanos = IOSTATS(write_nanos); prev_fsync_nanos = IOSTATS(fsync_nanos); prev_range_sync_nanos = IOSTATS(range_sync_nanos); prev_prepare_write_nanos = IOSTATS(prepare_write_nanos); prev_cpu_write_nanos = IOSTATS(cpu_write_nanos); prev_cpu_read_nanos = IOSTATS(cpu_read_nanos); } MergeHelper merge( env_, cfd->user_comparator(), cfd->ioptions()->merge_operator.get(), compaction_filter, db_options_.info_log.get(), false /* internal key corruption is expected */, existing_snapshots_.empty() ? 0 : existing_snapshots_.back(), snapshot_checker_, compact_->compaction->level(), db_options_.stats); const MutableCFOptions* mutable_cf_options = sub_compact->compaction->mutable_cf_options(); assert(mutable_cf_options); std::vector blob_file_paths; // TODO: BlobDB to support output_to_penultimate_level compaction, which needs // 2 builders, so may need to move to `CompactionOutputs` std::unique_ptr blob_file_builder( (mutable_cf_options->enable_blob_files && sub_compact->compaction->output_level() >= mutable_cf_options->blob_file_starting_level) ? new BlobFileBuilder( versions_, fs_.get(), sub_compact->compaction->immutable_options(), mutable_cf_options, &file_options_, &write_options, db_id_, db_session_id_, job_id_, cfd->GetID(), cfd->GetName(), write_hint_, io_tracer_, blob_callback_, BlobFileCreationReason::kCompaction, &blob_file_paths, sub_compact->Current().GetBlobFileAdditionsPtr()) : nullptr); TEST_SYNC_POINT("CompactionJob::Run():Inprogress"); TEST_SYNC_POINT_CALLBACK("CompactionJob::Run():PausingManualCompaction:1", static_cast(const_cast*>( &manual_compaction_canceled_))); const std::string* const full_history_ts_low = full_history_ts_low_.empty() ? nullptr : &full_history_ts_low_; const SequenceNumber job_snapshot_seq = job_context_ ? job_context_->GetJobSnapshotSequence() : kMaxSequenceNumber; auto c_iter = std::make_unique( input, cfd->user_comparator(), &merge, versions_->LastSequence(), &existing_snapshots_, earliest_snapshot_, earliest_write_conflict_snapshot_, job_snapshot_seq, snapshot_checker_, env_, ShouldReportDetailedTime(env_, stats_), /*expect_valid_internal_key=*/true, range_del_agg.get(), blob_file_builder.get(), db_options_.allow_data_in_errors, db_options_.enforce_single_del_contracts, manual_compaction_canceled_, sub_compact->compaction ->DoesInputReferenceBlobFiles() /* must_count_input_entries */, sub_compact->compaction, compaction_filter, shutting_down_, db_options_.info_log, full_history_ts_low, preserve_time_min_seqno_, preclude_last_level_min_seqno_); c_iter->SeekToFirst(); // Assign range delete aggregator to the target output level, which makes sure // it only output to single level sub_compact->AssignRangeDelAggregator(std::move(range_del_agg)); const auto& c_iter_stats = c_iter->iter_stats(); // define the open and close functions for the compaction files, which will be // used open/close output files when needed. const CompactionFileOpenFunc open_file_func = [this, sub_compact](CompactionOutputs& outputs) { return this->OpenCompactionOutputFile(sub_compact, outputs); }; const CompactionFileCloseFunc close_file_func = [this, sub_compact, start_user_key, end_user_key]( CompactionOutputs& outputs, const Status& status, const Slice& next_table_min_key) { return this->FinishCompactionOutputFile( status, sub_compact, outputs, next_table_min_key, sub_compact->start.has_value() ? &start_user_key : nullptr, sub_compact->end.has_value() ? &end_user_key : nullptr); }; Status status; TEST_SYNC_POINT_CALLBACK( "CompactionJob::ProcessKeyValueCompaction()::Processing", static_cast(const_cast(sub_compact->compaction))); uint64_t last_cpu_micros = prev_cpu_micros; while (status.ok() && !cfd->IsDropped() && c_iter->Valid()) { // Invariant: c_iter.status() is guaranteed to be OK if c_iter->Valid() // returns true. assert(!end.has_value() || cfd->user_comparator()->Compare(c_iter->user_key(), *end) < 0); if (c_iter_stats.num_input_records % kRecordStatsEvery == kRecordStatsEvery - 1) { RecordDroppedKeys(c_iter_stats, &sub_compact->compaction_job_stats); c_iter->ResetRecordCounts(); RecordCompactionIOStats(); uint64_t cur_cpu_micros = db_options_.clock->CPUMicros(); assert(cur_cpu_micros >= last_cpu_micros); RecordTick(stats_, COMPACTION_CPU_TOTAL_TIME, cur_cpu_micros - last_cpu_micros); last_cpu_micros = cur_cpu_micros; } // Add current compaction_iterator key to target compaction output, if the // output file needs to be close or open, it will call the `open_file_func` // and `close_file_func`. // TODO: it would be better to have the compaction file open/close moved // into `CompactionOutputs` which has the output file information. status = sub_compact->AddToOutput(*c_iter, open_file_func, close_file_func); if (!status.ok()) { break; } TEST_SYNC_POINT_CALLBACK("CompactionJob::Run():PausingManualCompaction:2", static_cast(const_cast*>( &manual_compaction_canceled_))); c_iter->Next(); if (c_iter->status().IsManualCompactionPaused()) { break; } #ifndef NDEBUG bool stop = false; TEST_SYNC_POINT_CALLBACK("CompactionJob::ProcessKeyValueCompaction()::stop", static_cast(&stop)); if (stop) { break; } #endif // NDEBUG } // This number may not be accurate when CompactionIterator was created // with `must_count_input_entries=false`. assert(!sub_compact->compaction->DoesInputReferenceBlobFiles() || c_iter->HasNumInputEntryScanned()); sub_compact->compaction_job_stats.has_num_input_records = c_iter->HasNumInputEntryScanned(); sub_compact->compaction_job_stats.num_input_records = c_iter->NumInputEntryScanned(); sub_compact->compaction_job_stats.num_blobs_read = c_iter_stats.num_blobs_read; sub_compact->compaction_job_stats.total_blob_bytes_read = c_iter_stats.total_blob_bytes_read; sub_compact->compaction_job_stats.num_input_deletion_records = c_iter_stats.num_input_deletion_records; sub_compact->compaction_job_stats.num_corrupt_keys = c_iter_stats.num_input_corrupt_records; sub_compact->compaction_job_stats.num_single_del_fallthru = c_iter_stats.num_single_del_fallthru; sub_compact->compaction_job_stats.num_single_del_mismatch = c_iter_stats.num_single_del_mismatch; sub_compact->compaction_job_stats.total_input_raw_key_bytes += c_iter_stats.total_input_raw_key_bytes; sub_compact->compaction_job_stats.total_input_raw_value_bytes += c_iter_stats.total_input_raw_value_bytes; RecordTick(stats_, FILTER_OPERATION_TOTAL_TIME, c_iter_stats.total_filter_time); if (c_iter_stats.num_blobs_relocated > 0) { RecordTick(stats_, BLOB_DB_GC_NUM_KEYS_RELOCATED, c_iter_stats.num_blobs_relocated); } if (c_iter_stats.total_blob_bytes_relocated > 0) { RecordTick(stats_, BLOB_DB_GC_BYTES_RELOCATED, c_iter_stats.total_blob_bytes_relocated); } RecordDroppedKeys(c_iter_stats, &sub_compact->compaction_job_stats); RecordCompactionIOStats(); if (status.ok() && cfd->IsDropped()) { status = Status::ColumnFamilyDropped("Column family dropped during compaction"); } if ((status.ok() || status.IsColumnFamilyDropped()) && shutting_down_->load(std::memory_order_relaxed)) { status = Status::ShutdownInProgress("Database shutdown"); } if ((status.ok() || status.IsColumnFamilyDropped()) && (manual_compaction_canceled_.load(std::memory_order_relaxed))) { status = Status::Incomplete(Status::SubCode::kManualCompactionPaused); } if (status.ok()) { status = input->status(); } if (status.ok()) { status = c_iter->status(); } // Call FinishCompactionOutputFile() even if status is not ok: it needs to // close the output files. Open file function is also passed, in case there's // only range-dels, no file was opened, to save the range-dels, it need to // create a new output file. status = sub_compact->CloseCompactionFiles(status, open_file_func, close_file_func); if (blob_file_builder) { if (status.ok()) { status = blob_file_builder->Finish(); } else { blob_file_builder->Abandon(status); } blob_file_builder.reset(); sub_compact->Current().UpdateBlobStats(); } uint64_t cur_cpu_micros = db_options_.clock->CPUMicros(); sub_compact->compaction_job_stats.cpu_micros = cur_cpu_micros - prev_cpu_micros; RecordTick(stats_, COMPACTION_CPU_TOTAL_TIME, cur_cpu_micros - last_cpu_micros); if (measure_io_stats_) { sub_compact->compaction_job_stats.file_write_nanos += IOSTATS(write_nanos) - prev_write_nanos; sub_compact->compaction_job_stats.file_fsync_nanos += IOSTATS(fsync_nanos) - prev_fsync_nanos; sub_compact->compaction_job_stats.file_range_sync_nanos += IOSTATS(range_sync_nanos) - prev_range_sync_nanos; sub_compact->compaction_job_stats.file_prepare_write_nanos += IOSTATS(prepare_write_nanos) - prev_prepare_write_nanos; sub_compact->compaction_job_stats.cpu_micros -= (IOSTATS(cpu_write_nanos) - prev_cpu_write_nanos + IOSTATS(cpu_read_nanos) - prev_cpu_read_nanos) / 1000; if (prev_perf_level != PerfLevel::kEnableTimeAndCPUTimeExceptForMutex) { SetPerfLevel(prev_perf_level); } } #ifdef ROCKSDB_ASSERT_STATUS_CHECKED if (!status.ok()) { if (c_iter) { c_iter->status().PermitUncheckedError(); } if (input) { input->status().PermitUncheckedError(); } } #endif // ROCKSDB_ASSERT_STATUS_CHECKED blob_counter.reset(); clip.reset(); raw_input.reset(); sub_compact->status = status; NotifyOnSubcompactionCompleted(sub_compact); } uint64_t CompactionJob::GetCompactionId(SubcompactionState* sub_compact) const { return (uint64_t)job_id_ << 32 | sub_compact->sub_job_id; } void CompactionJob::RecordDroppedKeys( const CompactionIterationStats& c_iter_stats, CompactionJobStats* compaction_job_stats) { if (c_iter_stats.num_record_drop_user > 0) { RecordTick(stats_, COMPACTION_KEY_DROP_USER, c_iter_stats.num_record_drop_user); } if (c_iter_stats.num_record_drop_hidden > 0) { RecordTick(stats_, COMPACTION_KEY_DROP_NEWER_ENTRY, c_iter_stats.num_record_drop_hidden); if (compaction_job_stats) { compaction_job_stats->num_records_replaced += c_iter_stats.num_record_drop_hidden; } } if (c_iter_stats.num_record_drop_obsolete > 0) { RecordTick(stats_, COMPACTION_KEY_DROP_OBSOLETE, c_iter_stats.num_record_drop_obsolete); if (compaction_job_stats) { compaction_job_stats->num_expired_deletion_records += c_iter_stats.num_record_drop_obsolete; } } if (c_iter_stats.num_record_drop_range_del > 0) { RecordTick(stats_, COMPACTION_KEY_DROP_RANGE_DEL, c_iter_stats.num_record_drop_range_del); } if (c_iter_stats.num_range_del_drop_obsolete > 0) { RecordTick(stats_, COMPACTION_RANGE_DEL_DROP_OBSOLETE, c_iter_stats.num_range_del_drop_obsolete); } if (c_iter_stats.num_optimized_del_drop_obsolete > 0) { RecordTick(stats_, COMPACTION_OPTIMIZED_DEL_DROP_OBSOLETE, c_iter_stats.num_optimized_del_drop_obsolete); } } Status CompactionJob::FinishCompactionOutputFile( const Status& input_status, SubcompactionState* sub_compact, CompactionOutputs& outputs, const Slice& next_table_min_key, const Slice* comp_start_user_key, const Slice* comp_end_user_key) { AutoThreadOperationStageUpdater stage_updater( ThreadStatus::STAGE_COMPACTION_SYNC_FILE); assert(sub_compact != nullptr); assert(outputs.HasBuilder()); FileMetaData* meta = outputs.GetMetaData(); uint64_t output_number = meta->fd.GetNumber(); assert(output_number != 0); ColumnFamilyData* cfd = sub_compact->compaction->column_family_data(); std::string file_checksum = kUnknownFileChecksum; std::string file_checksum_func_name = kUnknownFileChecksumFuncName; // Check for iterator errors Status s = input_status; // Add range tombstones auto earliest_snapshot = kMaxSequenceNumber; if (existing_snapshots_.size() > 0) { earliest_snapshot = existing_snapshots_[0]; } if (s.ok()) { CompactionIterationStats range_del_out_stats; // if the compaction supports per_key_placement, only output range dels to // the penultimate level. // Note: Use `bottommost_level_ = true` for both bottommost and // output_to_penultimate_level compaction here, as it's only used to decide // if range dels could be dropped. if (outputs.HasRangeDel()) { s = outputs.AddRangeDels(comp_start_user_key, comp_end_user_key, range_del_out_stats, bottommost_level_, cfd->internal_comparator(), earliest_snapshot, next_table_min_key, full_history_ts_low_); } RecordDroppedKeys(range_del_out_stats, &sub_compact->compaction_job_stats); TEST_SYNC_POINT("CompactionJob::FinishCompactionOutputFile1"); } const uint64_t current_entries = outputs.NumEntries(); s = outputs.Finish(s, seqno_to_time_mapping_); if (s.ok()) { // With accurate smallest and largest key, we can get a slightly more // accurate oldest ancester time. // This makes oldest ancester time in manifest more accurate than in // table properties. Not sure how to resolve it. if (meta->smallest.size() > 0 && meta->largest.size() > 0) { uint64_t refined_oldest_ancester_time; Slice new_smallest = meta->smallest.user_key(); Slice new_largest = meta->largest.user_key(); if (!new_largest.empty() && !new_smallest.empty()) { refined_oldest_ancester_time = sub_compact->compaction->MinInputFileOldestAncesterTime( &(meta->smallest), &(meta->largest)); if (refined_oldest_ancester_time != std::numeric_limits::max()) { meta->oldest_ancester_time = refined_oldest_ancester_time; } } } } // Finish and check for file errors IOStatus io_s = outputs.WriterSyncClose(s, db_options_.clock, stats_, db_options_.use_fsync); if (s.ok() && io_s.ok()) { file_checksum = meta->file_checksum; file_checksum_func_name = meta->file_checksum_func_name; } if (s.ok()) { s = io_s; } if (sub_compact->io_status.ok()) { sub_compact->io_status = io_s; // Since this error is really a copy of the // "normal" status, it does not also need to be checked sub_compact->io_status.PermitUncheckedError(); } TableProperties tp; if (s.ok()) { tp = outputs.GetTableProperties(); } if (s.ok() && current_entries == 0 && tp.num_range_deletions == 0) { // If there is nothing to output, no necessary to generate a sst file. // This happens when the output level is bottom level, at the same time // the sub_compact output nothing. std::string fname = TableFileName(sub_compact->compaction->immutable_options()->cf_paths, meta->fd.GetNumber(), meta->fd.GetPathId()); // TODO(AR) it is not clear if there are any larger implications if // DeleteFile fails here Status ds = env_->DeleteFile(fname); if (!ds.ok()) { ROCKS_LOG_WARN( db_options_.info_log, "[%s] [JOB %d] Unable to remove SST file for table #%" PRIu64 " at bottom level%s", cfd->GetName().c_str(), job_id_, output_number, meta->marked_for_compaction ? " (need compaction)" : ""); } // Also need to remove the file from outputs, or it will be added to the // VersionEdit. outputs.RemoveLastOutput(); meta = nullptr; } if (s.ok() && (current_entries > 0 || tp.num_range_deletions > 0)) { // Output to event logger and fire events. outputs.UpdateTableProperties(); ROCKS_LOG_INFO(db_options_.info_log, "[%s] [JOB %d] Generated table #%" PRIu64 ": %" PRIu64 " keys, %" PRIu64 " bytes%s, temperature: %s", cfd->GetName().c_str(), job_id_, output_number, current_entries, meta->fd.file_size, meta->marked_for_compaction ? " (need compaction)" : "", temperature_to_string[meta->temperature].c_str()); } std::string fname; FileDescriptor output_fd; uint64_t oldest_blob_file_number = kInvalidBlobFileNumber; Status status_for_listener = s; if (meta != nullptr) { fname = GetTableFileName(meta->fd.GetNumber()); output_fd = meta->fd; oldest_blob_file_number = meta->oldest_blob_file_number; } else { fname = "(nil)"; if (s.ok()) { status_for_listener = Status::Aborted("Empty SST file not kept"); } } EventHelpers::LogAndNotifyTableFileCreationFinished( event_logger_, cfd->ioptions()->listeners, dbname_, cfd->GetName(), fname, job_id_, output_fd, oldest_blob_file_number, tp, TableFileCreationReason::kCompaction, status_for_listener, file_checksum, file_checksum_func_name); // Report new file to SstFileManagerImpl auto sfm = static_cast(db_options_.sst_file_manager.get()); if (sfm && meta != nullptr && meta->fd.GetPathId() == 0) { Status add_s = sfm->OnAddFile(fname); if (!add_s.ok() && s.ok()) { s = add_s; } if (sfm->IsMaxAllowedSpaceReached()) { // TODO(ajkr): should we return OK() if max space was reached by the final // compaction output file (similarly to how flush works when full)? s = Status::SpaceLimit("Max allowed space was reached"); TEST_SYNC_POINT( "CompactionJob::FinishCompactionOutputFile:MaxAllowedSpaceReached"); InstrumentedMutexLock l(db_mutex_); db_error_handler_->SetBGError(s, BackgroundErrorReason::kCompaction); } } outputs.ResetBuilder(); return s; } Status CompactionJob::InstallCompactionResults( const MutableCFOptions& mutable_cf_options, bool* compaction_released) { assert(compact_); db_mutex_->AssertHeld(); const ReadOptions read_options(Env::IOActivity::kCompaction); const WriteOptions write_options(Env::IOActivity::kCompaction); auto* compaction = compact_->compaction; assert(compaction); { Compaction::InputLevelSummaryBuffer inputs_summary; if (compaction_stats_.has_penultimate_level_output) { ROCKS_LOG_BUFFER( log_buffer_, "[%s] [JOB %d] Compacted %s => output_to_penultimate_level: %" PRIu64 " bytes + last: %" PRIu64 " bytes. Total: %" PRIu64 " bytes", compaction->column_family_data()->GetName().c_str(), job_id_, compaction->InputLevelSummary(&inputs_summary), compaction_stats_.penultimate_level_stats.bytes_written, compaction_stats_.stats.bytes_written, compaction_stats_.TotalBytesWritten()); } else { ROCKS_LOG_BUFFER(log_buffer_, "[%s] [JOB %d] Compacted %s => %" PRIu64 " bytes", compaction->column_family_data()->GetName().c_str(), job_id_, compaction->InputLevelSummary(&inputs_summary), compaction_stats_.TotalBytesWritten()); } } VersionEdit* const edit = compaction->edit(); assert(edit); // Add compaction inputs compaction->AddInputDeletions(edit); std::unordered_map blob_total_garbage; for (const auto& sub_compact : compact_->sub_compact_states) { sub_compact.AddOutputsEdit(edit); for (const auto& blob : sub_compact.Current().GetBlobFileAdditions()) { edit->AddBlobFile(blob); } if (sub_compact.Current().GetBlobGarbageMeter()) { const auto& flows = sub_compact.Current().GetBlobGarbageMeter()->flows(); for (const auto& pair : flows) { const uint64_t blob_file_number = pair.first; const BlobGarbageMeter::BlobInOutFlow& flow = pair.second; assert(flow.IsValid()); if (flow.HasGarbage()) { blob_total_garbage[blob_file_number].Add(flow.GetGarbageCount(), flow.GetGarbageBytes()); } } } } for (const auto& pair : blob_total_garbage) { const uint64_t blob_file_number = pair.first; const BlobGarbageMeter::BlobStats& stats = pair.second; edit->AddBlobFileGarbage(blob_file_number, stats.GetCount(), stats.GetBytes()); } if ((compaction->compaction_reason() == CompactionReason::kLevelMaxLevelSize || compaction->compaction_reason() == CompactionReason::kRoundRobinTtl) && compaction->immutable_options()->compaction_pri == kRoundRobin) { int start_level = compaction->start_level(); if (start_level > 0) { auto vstorage = compaction->input_version()->storage_info(); edit->AddCompactCursor(start_level, vstorage->GetNextCompactCursor( start_level, compaction->num_input_files(0))); } } auto manifest_wcb = [&compaction, &compaction_released](const Status& s) { compaction->ReleaseCompactionFiles(s); *compaction_released = true; }; return versions_->LogAndApply( compaction->column_family_data(), mutable_cf_options, read_options, write_options, edit, db_mutex_, db_directory_, /*new_descriptor_log=*/false, /*column_family_options=*/nullptr, manifest_wcb); } void CompactionJob::RecordCompactionIOStats() { RecordTick(stats_, COMPACT_READ_BYTES, IOSTATS(bytes_read)); RecordTick(stats_, COMPACT_WRITE_BYTES, IOSTATS(bytes_written)); CompactionReason compaction_reason = compact_->compaction->compaction_reason(); if (compaction_reason == CompactionReason::kFilesMarkedForCompaction) { RecordTick(stats_, COMPACT_READ_BYTES_MARKED, IOSTATS(bytes_read)); RecordTick(stats_, COMPACT_WRITE_BYTES_MARKED, IOSTATS(bytes_written)); } else if (compaction_reason == CompactionReason::kPeriodicCompaction) { RecordTick(stats_, COMPACT_READ_BYTES_PERIODIC, IOSTATS(bytes_read)); RecordTick(stats_, COMPACT_WRITE_BYTES_PERIODIC, IOSTATS(bytes_written)); } else if (compaction_reason == CompactionReason::kTtl) { RecordTick(stats_, COMPACT_READ_BYTES_TTL, IOSTATS(bytes_read)); RecordTick(stats_, COMPACT_WRITE_BYTES_TTL, IOSTATS(bytes_written)); } ThreadStatusUtil::IncreaseThreadOperationProperty( ThreadStatus::COMPACTION_BYTES_READ, IOSTATS(bytes_read)); IOSTATS_RESET(bytes_read); ThreadStatusUtil::IncreaseThreadOperationProperty( ThreadStatus::COMPACTION_BYTES_WRITTEN, IOSTATS(bytes_written)); IOSTATS_RESET(bytes_written); } Status CompactionJob::OpenCompactionOutputFile(SubcompactionState* sub_compact, CompactionOutputs& outputs) { assert(sub_compact != nullptr); // no need to lock because VersionSet::next_file_number_ is atomic uint64_t file_number = versions_->NewFileNumber(); std::string fname = GetTableFileName(file_number); // Fire events. ColumnFamilyData* cfd = sub_compact->compaction->column_family_data(); EventHelpers::NotifyTableFileCreationStarted( cfd->ioptions()->listeners, dbname_, cfd->GetName(), fname, job_id_, TableFileCreationReason::kCompaction); // Make the output file std::unique_ptr writable_file; #ifndef NDEBUG bool syncpoint_arg = file_options_.use_direct_writes; TEST_SYNC_POINT_CALLBACK("CompactionJob::OpenCompactionOutputFile", &syncpoint_arg); #endif // Pass temperature of the last level files to FileSystem. FileOptions fo_copy = file_options_; Temperature temperature = sub_compact->compaction->output_temperature(); Temperature last_level_temp = sub_compact->compaction->mutable_cf_options()->last_level_temperature; // Here last_level_temperature supersedes default_write_temperature, when // enabled and applicable if (last_level_temp != Temperature::kUnknown && sub_compact->compaction->is_last_level() && !sub_compact->IsCurrentPenultimateLevel()) { temperature = last_level_temp; } fo_copy.temperature = temperature; Status s; IOStatus io_s = NewWritableFile(fs_.get(), fname, &writable_file, fo_copy); s = io_s; if (sub_compact->io_status.ok()) { sub_compact->io_status = io_s; // Since this error is really a copy of the io_s that is checked below as s, // it does not also need to be checked. sub_compact->io_status.PermitUncheckedError(); } if (!s.ok()) { ROCKS_LOG_ERROR( db_options_.info_log, "[%s] [JOB %d] OpenCompactionOutputFiles for table #%" PRIu64 " fails at NewWritableFile with status %s", sub_compact->compaction->column_family_data()->GetName().c_str(), job_id_, file_number, s.ToString().c_str()); LogFlush(db_options_.info_log); EventHelpers::LogAndNotifyTableFileCreationFinished( event_logger_, cfd->ioptions()->listeners, dbname_, cfd->GetName(), fname, job_id_, FileDescriptor(), kInvalidBlobFileNumber, TableProperties(), TableFileCreationReason::kCompaction, s, kUnknownFileChecksum, kUnknownFileChecksumFuncName); return s; } // Try to figure out the output file's oldest ancester time. int64_t temp_current_time = 0; auto get_time_status = db_options_.clock->GetCurrentTime(&temp_current_time); // Safe to proceed even if GetCurrentTime fails. So, log and proceed. if (!get_time_status.ok()) { ROCKS_LOG_WARN(db_options_.info_log, "Failed to get current time. Status: %s", get_time_status.ToString().c_str()); } uint64_t current_time = static_cast(temp_current_time); InternalKey tmp_start, tmp_end; if (sub_compact->start.has_value()) { tmp_start.SetMinPossibleForUserKey(*(sub_compact->start)); } if (sub_compact->end.has_value()) { tmp_end.SetMinPossibleForUserKey(*(sub_compact->end)); } uint64_t oldest_ancester_time = sub_compact->compaction->MinInputFileOldestAncesterTime( sub_compact->start.has_value() ? &tmp_start : nullptr, sub_compact->end.has_value() ? &tmp_end : nullptr); if (oldest_ancester_time == std::numeric_limits::max()) { // TODO: fix DBSSTTest.GetTotalSstFilesSize and use // kUnknownOldestAncesterTime oldest_ancester_time = current_time; } // Initialize a SubcompactionState::Output and add it to sub_compact->outputs uint64_t epoch_number = sub_compact->compaction->MinInputFileEpochNumber(); { FileMetaData meta; meta.fd = FileDescriptor(file_number, sub_compact->compaction->output_path_id(), 0); meta.oldest_ancester_time = oldest_ancester_time; meta.file_creation_time = current_time; meta.epoch_number = epoch_number; meta.temperature = temperature; assert(!db_id_.empty()); assert(!db_session_id_.empty()); s = GetSstInternalUniqueId(db_id_, db_session_id_, meta.fd.GetNumber(), &meta.unique_id); if (!s.ok()) { ROCKS_LOG_ERROR(db_options_.info_log, "[%s] [JOB %d] file #%" PRIu64 " failed to generate unique id: %s.", cfd->GetName().c_str(), job_id_, meta.fd.GetNumber(), s.ToString().c_str()); return s; } outputs.AddOutput(std::move(meta), cfd->internal_comparator(), paranoid_file_checks_); } writable_file->SetIOPriority(GetRateLimiterPriority()); writable_file->SetWriteLifeTimeHint(write_hint_); FileTypeSet tmp_set = db_options_.checksum_handoff_file_types; writable_file->SetPreallocationBlockSize(static_cast( sub_compact->compaction->OutputFilePreallocationSize())); const auto& listeners = sub_compact->compaction->immutable_options()->listeners; outputs.AssignFileWriter(new WritableFileWriter( std::move(writable_file), fname, fo_copy, db_options_.clock, io_tracer_, db_options_.stats, Histograms::SST_WRITE_MICROS, listeners, db_options_.file_checksum_gen_factory.get(), tmp_set.Contains(FileType::kTableFile), false)); // TODO(hx235): pass in the correct `oldest_key_time` instead of `0` const ReadOptions read_options(Env::IOActivity::kCompaction); const WriteOptions write_options(Env::IOActivity::kCompaction); TableBuilderOptions tboptions( *cfd->ioptions(), *(sub_compact->compaction->mutable_cf_options()), read_options, write_options, cfd->internal_comparator(), cfd->internal_tbl_prop_coll_factories(), sub_compact->compaction->output_compression(), sub_compact->compaction->output_compression_opts(), cfd->GetID(), cfd->GetName(), sub_compact->compaction->output_level(), bottommost_level_, TableFileCreationReason::kCompaction, 0 /* oldest_key_time */, current_time, db_id_, db_session_id_, sub_compact->compaction->max_output_file_size(), file_number, preclude_last_level_min_seqno_ == kMaxSequenceNumber ? preclude_last_level_min_seqno_ : std::min(earliest_snapshot_, preclude_last_level_min_seqno_)); outputs.NewBuilder(tboptions); LogFlush(db_options_.info_log); return s; } void CompactionJob::CleanupCompaction() { for (SubcompactionState& sub_compact : compact_->sub_compact_states) { sub_compact.Cleanup(table_cache_.get()); } delete compact_; compact_ = nullptr; } namespace { void CopyPrefix(const Slice& src, size_t prefix_length, std::string* dst) { assert(prefix_length > 0); size_t length = src.size() > prefix_length ? prefix_length : src.size(); dst->assign(src.data(), length); } } // namespace bool CompactionJob::UpdateCompactionStats(uint64_t* num_input_range_del) { assert(compact_); Compaction* compaction = compact_->compaction; compaction_stats_.stats.num_input_files_in_non_output_levels = 0; compaction_stats_.stats.num_input_files_in_output_level = 0; bool has_error = false; const ReadOptions read_options(Env::IOActivity::kCompaction); const auto& input_table_properties = compaction->GetInputTableProperties(); for (int input_level = 0; input_level < static_cast(compaction->num_input_levels()); ++input_level) { size_t num_input_files = compaction->num_input_files(input_level); uint64_t* bytes_read; if (compaction->level(input_level) != compaction->output_level()) { compaction_stats_.stats.num_input_files_in_non_output_levels += static_cast(num_input_files); bytes_read = &compaction_stats_.stats.bytes_read_non_output_levels; } else { compaction_stats_.stats.num_input_files_in_output_level += static_cast(num_input_files); bytes_read = &compaction_stats_.stats.bytes_read_output_level; } for (size_t i = 0; i < num_input_files; ++i) { const FileMetaData* file_meta = compaction->input(input_level, i); *bytes_read += file_meta->fd.GetFileSize(); uint64_t file_input_entries = file_meta->num_entries; uint64_t file_num_range_del = file_meta->num_range_deletions; if (file_input_entries == 0) { uint64_t file_number = file_meta->fd.GetNumber(); // Try getting info from table property std::string fn = TableFileName(compaction->immutable_options()->cf_paths, file_number, file_meta->fd.GetPathId()); const auto& tp = input_table_properties.find(fn); if (tp != input_table_properties.end()) { file_input_entries = tp->second->num_entries; file_num_range_del = tp->second->num_range_deletions; } else { has_error = true; } } compaction_stats_.stats.num_input_records += file_input_entries; if (num_input_range_del) { *num_input_range_del += file_num_range_del; } } } assert(compaction_job_stats_); compaction_stats_.stats.bytes_read_blob = compaction_job_stats_->total_blob_bytes_read; compaction_stats_.stats.num_dropped_records = compaction_stats_.DroppedRecords(); return !has_error; } void CompactionJob::UpdateCompactionJobStats( const InternalStats::CompactionStats& stats) const { compaction_job_stats_->elapsed_micros = stats.micros; // input information compaction_job_stats_->total_input_bytes = stats.bytes_read_non_output_levels + stats.bytes_read_output_level; compaction_job_stats_->num_input_records = stats.num_input_records; compaction_job_stats_->num_input_files = stats.num_input_files_in_non_output_levels + stats.num_input_files_in_output_level; compaction_job_stats_->num_input_files_at_output_level = stats.num_input_files_in_output_level; // output information compaction_job_stats_->total_output_bytes = stats.bytes_written; compaction_job_stats_->total_output_bytes_blob = stats.bytes_written_blob; compaction_job_stats_->num_output_records = stats.num_output_records; compaction_job_stats_->num_output_files = stats.num_output_files; compaction_job_stats_->num_output_files_blob = stats.num_output_files_blob; if (stats.num_output_files > 0) { CopyPrefix(compact_->SmallestUserKey(), CompactionJobStats::kMaxPrefixLength, &compaction_job_stats_->smallest_output_key_prefix); CopyPrefix(compact_->LargestUserKey(), CompactionJobStats::kMaxPrefixLength, &compaction_job_stats_->largest_output_key_prefix); } } void CompactionJob::LogCompaction() { Compaction* compaction = compact_->compaction; ColumnFamilyData* cfd = compaction->column_family_data(); // Let's check if anything will get logged. Don't prepare all the info if // we're not logging if (db_options_.info_log_level <= InfoLogLevel::INFO_LEVEL) { Compaction::InputLevelSummaryBuffer inputs_summary; ROCKS_LOG_INFO( db_options_.info_log, "[%s] [JOB %d] Compacting %s, score %.2f", cfd->GetName().c_str(), job_id_, compaction->InputLevelSummary(&inputs_summary), compaction->score()); char scratch[2345]; compaction->Summary(scratch, sizeof(scratch)); ROCKS_LOG_INFO(db_options_.info_log, "[%s]: Compaction start summary: %s\n", cfd->GetName().c_str(), scratch); // build event logger report auto stream = event_logger_->Log(); stream << "job" << job_id_ << "event" << "compaction_started" << "compaction_reason" << GetCompactionReasonString(compaction->compaction_reason()); for (size_t i = 0; i < compaction->num_input_levels(); ++i) { stream << ("files_L" + std::to_string(compaction->level(i))); stream.StartArray(); for (auto f : *compaction->inputs(i)) { stream << f->fd.GetNumber(); } stream.EndArray(); } stream << "score" << compaction->score() << "input_data_size" << compaction->CalculateTotalInputSize() << "oldest_snapshot_seqno" << (existing_snapshots_.empty() ? int64_t{-1} // Use -1 for "none" : static_cast(existing_snapshots_[0])); if (compaction->SupportsPerKeyPlacement()) { stream << "preclude_last_level_min_seqno" << preclude_last_level_min_seqno_; stream << "penultimate_output_level" << compaction->GetPenultimateLevel(); stream << "penultimate_output_range" << GetCompactionPenultimateOutputRangeTypeString( compaction->GetPenultimateOutputRangeType()); if (compaction->GetPenultimateOutputRangeType() == Compaction::PenultimateOutputRangeType::kDisabled) { ROCKS_LOG_WARN( db_options_.info_log, "[%s] [JOB %d] Penultimate level output is disabled, likely " "because of the range conflict in the penultimate level", cfd->GetName().c_str(), job_id_); } } } } std::string CompactionJob::GetTableFileName(uint64_t file_number) { return TableFileName(compact_->compaction->immutable_options()->cf_paths, file_number, compact_->compaction->output_path_id()); } Env::IOPriority CompactionJob::GetRateLimiterPriority() { if (versions_ && versions_->GetColumnFamilySet() && versions_->GetColumnFamilySet()->write_controller()) { WriteController* write_controller = versions_->GetColumnFamilySet()->write_controller(); if (write_controller->NeedsDelay() || write_controller->IsStopped()) { return Env::IO_USER; } } return Env::IO_LOW; } } // namespace ROCKSDB_NAMESPACE