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rocksdb/db/compaction/compaction_job.cc
Jay Zhuang c401f285c3 Add option preserve_internal_time_seconds to preserve the time info (#10747) 
Summary:
Add option `preserve_internal_time_seconds` to preserve the internal
time information.
It's mostly for the migration of the existing data to tiered storage (
`preclude_last_level_data_seconds`). When the tiering feature is just
enabled, the existing data won't have the time information to decide if
it's hot or cold. Enabling this feature will start collect and preserve
the time information for the new data.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/10747

Reviewed By: siying

Differential Revision: D39910141

Pulled By: siying

fbshipit-source-id: 25c21638e37b1a7c44006f636b7d714fe7242138
2022-10-07 18:49:40 -07:00

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// 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 <algorithm>
#include <cinttypes>
#include <memory>
#include <optional>
#include <set>
#include <utility>
#include <vector>
#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::kNumOfReasons:
// fall through
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<bool>* 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<SequenceNumber> existing_snapshots,
SequenceNumber earliest_write_conflict_snapshot,
const SnapshotChecker* snapshot_checker, JobContext* job_context,
std::shared_ptr<Cache> 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<IOTracer>& io_tracer,
const std::atomic<bool>& 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_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::SetColumnFamily(cfd, cfd->ioptions()->env,
db_options_.enable_thread_tracking);
ThreadStatusUtil::SetThreadOperation(ThreadStatus::OP_COMPACTION);
ReportStartedCompaction(compaction);
}
CompactionJob::~CompactionJob() {
assert(compact_ == nullptr);
ThreadStatusUtil::ResetThreadStatus();
}
void CompactionJob::ReportStartedCompaction(Compaction* compaction) {
const auto* cfd = compact_->compaction->column_family_data();
ThreadStatusUtil::SetColumnFamily(cfd, cfd->ioptions()->env,
db_options_.enable_thread_tracking);
ThreadStatusUtil::SetThreadOperationProperty(ThreadStatus::COMPACTION_JOB_ID,
job_id_);
ThreadStatusUtil::SetThreadOperationProperty(
ThreadStatus::COMPACTION_INPUT_OUTPUT_LEVEL,
(static_cast<uint64_t>(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;
ColumnFamilyData* cfd = c->column_family_data();
assert(cfd != nullptr);
assert(cfd->current()->storage_info()->NumLevelFiles(
compact_->compaction->level()) > 0);
write_hint_ = cfd->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<Slice>(boundaries_[i - 1]) : std::nullopt,
(i != boundaries_.size()) ? std::optional<Slice>(boundaries_[i])
: std::nullopt,
static_cast<uint32_t>(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) {
// setup seqno_time_mapping_
seqno_time_mapping_.SetMaxTimeDuration(preserve_time_duration);
for (const auto& each_level : *c->inputs()) {
for (const auto& fmd : each_level.files) {
std::shared_ptr<const TableProperties> tp;
Status s = cfd->current()->GetTableProperties(&tp, fmd, nullptr);
if (s.ok()) {
seqno_time_mapping_.Add(tp->seqno_to_time_mapping)
.PermitUncheckedError();
seqno_time_mapping_.Add(fmd->fd.smallest_seqno,
fmd->oldest_ancester_time);
}
}
}
auto status = seqno_time_mapping_.Sort();
if (!status.ok()) {
ROCKS_LOG_WARN(db_options_.info_log,
"Invalid sequence number to time mapping: Status: %s",
status.ToString().c_str());
}
int64_t _current_time = 0;
status = db_options_.clock->GetCurrentTime(&_current_time);
if (!status.ok()) {
ROCKS_LOG_WARN(db_options_.info_log,
"Failed to get current time in compaction: Status: %s",
status.ToString().c_str());
// preserve all time information
preserve_time_min_seqno_ = 0;
preclude_last_level_min_seqno_ = 0;
} else {
seqno_time_mapping_.TruncateOldEntries(_current_time);
uint64_t preserve_time =
static_cast<uint64_t>(_current_time) > preserve_time_duration
? _current_time - preserve_time_duration
: 0;
preserve_time_min_seqno_ =
seqno_time_mapping_.GetOldestSequenceNum(preserve_time);
if (c->immutable_options()->preclude_last_level_data_seconds > 0) {
uint64_t preclude_last_level_time =
static_cast<uint64_t>(_current_time) >
c->immutable_options()->preclude_last_level_data_seconds
? _current_time -
c->immutable_options()->preclude_last_level_data_seconds
: 0;
preclude_last_level_min_seqno_ =
seqno_time_mapping_.GetOldestSequenceNum(preclude_last_level_time);
}
}
}
}
uint64_t CompactionJob::GetSubcompactionsLimit() {
return extra_num_subcompaction_threads_reserved_ +
std::max(
std::uint64_t(1),
static_cast<uint64_t>(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_);
}
struct RangeWithSize {
Range range;
uint64_t size;
RangeWithSize(const Slice& a, const Slice& b, uint64_t s = 0)
: range(a, b), size(s) {}
};
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.
auto* c = compact_->compaction;
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<TableReader::Anchor> 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<TableReader::Anchor> my_anchors;
Status s = cfd->table_cache()->ApproximateKeyAnchors(
ReadOptions(), icomp, *f, 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<uint64_t>(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();
// Launch a thread for each of subcompactions 1...num_threads-1
std::vector<port::Thread> 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[0]);
// 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<const CompactionOutputs::Output*> 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<size_t> 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 read_options;
InternalIterator* iter = cfd->table_cache()->NewIterator(
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);
auto s = iter->status();
if (s.ok() && paranoid_file_checks_) {
OutputValidator validator(cfd->internal_comparator(),
/*_enable_order_check=*/true,
/*_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());
tp[fn] = output.table_properties;
}
}
compact_->compaction->SetOutputTableProperties(std::move(tp));
// Finish up all book-keeping to unify the subcompaction results
compact_->AggregateCompactionStats(compaction_stats_, *compaction_job_stats_);
UpdateCompactionStats();
RecordCompactionIOStats();
LogFlush(db_options_.info_log);
TEST_SYNC_POINT("CompactionJob::Run():End");
compact_->status = status;
return status;
}
Status CompactionJob::Install(const MutableCFOptions& mutable_cf_options) {
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);
}
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<double>(bytes_read_non_output_and_blob);
write_amp =
bytes_written_all / static_cast<double>(bytes_read_non_output_and_blob);
}
if (stats.micros > 0) {
bytes_read_per_sec = bytes_read_all / static_cast<double>(stats.micros);
bytes_written_per_sec =
bytes_written_all / static_cast<double>(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) {
#ifndef ROCKSDB_LITE
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<int>(job_id_);
info.thread_id = env_->GetThreadID();
for (const auto& listener : db_options_.listeners) {
listener->OnSubcompactionBegin(info);
}
info.status.PermitUncheckedError();
#else
(void)sub_compact;
#endif // ROCKSDB_LITE
}
void CompactionJob::NotifyOnSubcompactionCompleted(
SubcompactionState* sub_compact) {
#ifndef ROCKSDB_LITE
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<int>(job_id_);
info.thread_id = env_->GetThreadID();
for (const auto& listener : db_options_.listeners) {
listener->OnSubcompactionCompleted(info);
}
#else
(void)sub_compact;
#endif // ROCKSDB_LITE
}
void CompactionJob::ProcessKeyValueCompaction(SubcompactionState* sub_compact) {
assert(sub_compact);
assert(sub_compact->compaction);
#ifndef ROCKSDB_LITE
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);
}
#endif // !ROCKSDB_LITE
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<CompactionFilter> 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<CompactionRangeDelAggregator>(
&cfd->internal_comparator(), existing_snapshots_, &full_history_ts_low_,
&trim_ts_);
// TODO: since we already use C++17, should use
// std::optional<const Slice> instead.
const std::optional<Slice> start = sub_compact->start;
const std::optional<Slice> end = sub_compact->end;
std::optional<Slice> start_without_ts;
std::optional<Slice> end_without_ts;
ReadOptions read_options;
read_options.verify_checksums = true;
read_options.fill_cache = false;
read_options.rate_limiter_priority = GetRateLimiterPriority();
// 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;
// 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.value();
if (ts_sz > 0) {
start_without_ts = StripTimestampFromUserKey(start.value(), ts_sz);
read_options.iterate_lower_bound = &start_without_ts.value();
}
}
if (end.has_value()) {
read_options.iterate_upper_bound = &end.value();
if (ts_sz > 0) {
end_without_ts = StripTimestampFromUserKey(end.value(), ts_sz);
read_options.iterate_upper_bound = &end_without_ts.value();
}
}
// 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<InternalIterator> 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;
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.value(), kMaxSequenceNumber,
kValueTypeForSeek);
if (ts_sz > 0) {
start_ikey.UpdateInternalKey(kMaxSequenceNumber, kValueTypeForSeek,
&ts_slice);
}
start_slice = start_ikey.GetInternalKey();
}
if (end.has_value()) {
end_ikey.SetInternalKey(end.value(), kMaxSequenceNumber, kValueTypeForSeek);
if (ts_sz > 0) {
end_ikey.UpdateInternalKey(kMaxSequenceNumber, kValueTypeForSeek,
&ts_slice);
}
end_slice = end_ikey.GetInternalKey();
}
std::unique_ptr<InternalIterator> clip;
if (start.has_value() || end.has_value()) {
clip = std::make_unique<ClippingIterator>(
raw_input.get(), start.has_value() ? &start_slice : nullptr,
end.has_value() ? &end_slice : nullptr, &cfd->internal_comparator());
input = clip.get();
}
std::unique_ptr<InternalIterator> blob_counter;
if (sub_compact->compaction->DoesInputReferenceBlobFiles()) {
BlobGarbageMeter* meter = sub_compact->Current().CreateBlobGarbageMeter();
blob_counter = std::make_unique<BlobCountingIterator>(input, meter);
input = blob_counter.get();
}
std::unique_ptr<InternalIterator> trim_history_iter;
if (ts_sz > 0 && !trim_ts_.empty()) {
trim_history_iter = std::make_unique<HistoryTrimmingIterator>(
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<std::string> 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<BlobFileBuilder> 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_, db_id_, db_session_id_,
job_id_, cfd->GetID(), cfd->GetName(), Env::IOPriority::IO_LOW,
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",
reinterpret_cast<void*>(
const_cast<std::atomic<bool>*>(&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<CompactionIterator>(
input, cfd->user_comparator(), &merge, versions_->LastSequence(),
&existing_snapshots_, 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, 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](CompactionOutputs& outputs, const Status& status,
const Slice& next_table_min_key) {
return this->FinishCompactionOutputFile(status, sub_compact, outputs,
next_table_min_key);
};
Status status;
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.value()) < 0);
if (c_iter_stats.num_input_records % kRecordStatsEvery ==
kRecordStatsEvery - 1) {
RecordDroppedKeys(c_iter_stats, &sub_compact->compaction_job_stats);
c_iter->ResetRecordCounts();
RecordCompactionIOStats();
}
// 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",
reinterpret_cast<void*>(
const_cast<std::atomic<bool>*>(&manual_compaction_canceled_)));
c_iter->Next();
if (c_iter->status().IsManualCompactionPaused()) {
break;
}
}
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();
}
sub_compact->compaction_job_stats.cpu_micros =
db_options_.clock->CPUMicros() - prev_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) {
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(
sub_compact->start.has_value() ? &(sub_compact->start.value())
: nullptr,
sub_compact->end.has_value() ? &(sub_compact->end.value()) : nullptr,
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_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<uint64_t>::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);
#ifndef ROCKSDB_LITE
// Report new file to SstFileManagerImpl
auto sfm =
static_cast<SstFileManagerImpl*>(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);
}
}
#endif
outputs.ResetBuilder();
return s;
}
Status CompactionJob::InstallCompactionResults(
const MutableCFOptions& mutable_cf_options) {
assert(compact_);
db_mutex_->AssertHeld();
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<uint64_t, BlobGarbageMeter::BlobStats> 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)));
}
}
return versions_->LogAndApply(compaction->column_family_data(),
mutable_cf_options, edit, db_mutex_,
db_directory_);
}
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();
#ifndef ROCKSDB_LITE
EventHelpers::NotifyTableFileCreationStarted(
cfd->ioptions()->listeners, dbname_, cfd->GetName(), fname, job_id_,
TableFileCreationReason::kCompaction);
#endif // !ROCKSDB_LITE
// Make the output file
std::unique_ptr<FSWritableFile> 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();
// only set for the last level compaction and also it's not output to
// penultimate level (when preclude_last_level feature is enabled)
if (temperature == Temperature::kUnknown &&
sub_compact->compaction->is_last_level() &&
!sub_compact->IsCurrentPenultimateLevel()) {
temperature =
sub_compact->compaction->mutable_cf_options()->last_level_temperature;
}
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<uint64_t>(temp_current_time);
InternalKey tmp_start, tmp_end;
if (sub_compact->start.has_value()) {
tmp_start.SetMinPossibleForUserKey(sub_compact->start.value());
}
if (sub_compact->end.has_value()) {
tmp_end.SetMinPossibleForUserKey(sub_compact->end.value());
}
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<uint64_t>::max()) {
oldest_ancester_time = current_time;
}
// Initialize a SubcompactionState::Output and add it to sub_compact->outputs
{
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.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(),
sub_compact->compaction->mutable_cf_options()
->check_flush_compaction_key_order,
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<size_t>(
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, listeners, db_options_.file_checksum_gen_factory.get(),
tmp_set.Contains(FileType::kTableFile), false));
TableBuilderOptions tboptions(
*cfd->ioptions(), *(sub_compact->compaction->mutable_cf_options()),
cfd->internal_comparator(), cfd->int_tbl_prop_collector_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);
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;
}
#ifndef ROCKSDB_LITE
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
#endif // !ROCKSDB_LITE
void CompactionJob::UpdateCompactionStats() {
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;
for (int input_level = 0;
input_level < static_cast<int>(compaction->num_input_levels());
++input_level) {
if (compaction->level(input_level) != compaction->output_level()) {
UpdateCompactionInputStatsHelper(
&compaction_stats_.stats.num_input_files_in_non_output_levels,
&compaction_stats_.stats.bytes_read_non_output_levels, input_level);
} else {
UpdateCompactionInputStatsHelper(
&compaction_stats_.stats.num_input_files_in_output_level,
&compaction_stats_.stats.bytes_read_output_level, input_level);
}
}
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();
}
void CompactionJob::UpdateCompactionInputStatsHelper(int* num_files,
uint64_t* bytes_read,
int input_level) {
const Compaction* compaction = compact_->compaction;
auto num_input_files = compaction->num_input_files(input_level);
*num_files += static_cast<int>(num_input_files);
for (size_t i = 0; i < num_input_files; ++i) {
const auto* file_meta = compaction->input(input_level, i);
*bytes_read += file_meta->fd.GetFileSize();
compaction_stats_.stats.num_input_records +=
static_cast<uint64_t>(file_meta->num_entries);
}
}
void CompactionJob::UpdateCompactionJobStats(
const InternalStats::CompactionStats& stats) const {
#ifndef ROCKSDB_LITE
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);
}
#else
(void)stats;
#endif // !ROCKSDB_LITE
}
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<int64_t>(existing_snapshots_[0]));
}
}
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
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