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rocksdb/db/builder.cc

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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/builder.h"
#include <algorithm>
#include <deque>
#include <vector>
#include "db/blob/blob_file_builder.h"
#include "db/compaction/compaction_iterator.h"
#include "db/dbformat.h"
#include "db/event_helpers.h"
#include "db/internal_stats.h"
#include "db/merge_helper.h"
#include "db/output_validator.h"
#include "db/range_del_aggregator.h"
#include "db/table_cache.h"
#include "db/version_edit.h"
#include "file/file_util.h"
#include "file/filename.h"
#include "file/read_write_util.h"
#include "file/writable_file_writer.h"
#include "monitoring/iostats_context_imp.h"
#include "monitoring/thread_status_util.h"
#include "options/options_helper.h"
#include "rocksdb/db.h"
#include "rocksdb/env.h"
#include "rocksdb/iterator.h"
#include "rocksdb/options.h"
#include "rocksdb/table.h"
#include "table/block_based/block_based_table_builder.h"
#include "table/format.h"
#include "table/internal_iterator.h"
#include "table/unique_id_impl.h"
#include "test_util/sync_point.h"
#include "util/stop_watch.h"
namespace ROCKSDB_NAMESPACE {
class TableFactory;
TableBuilder* NewTableBuilder(const TableBuilderOptions& tboptions,
WritableFileWriter* file) {
assert((tboptions.column_family_id ==
TablePropertiesCollectorFactory::Context::kUnknownColumnFamily) ==
tboptions.column_family_name.empty());
return tboptions.ioptions.table_factory->NewTableBuilder(tboptions, file);
}
Status BuildTable(
const std::string& dbname, VersionSet* versions,
const ImmutableDBOptions& db_options, const TableBuilderOptions& tboptions,
const FileOptions& file_options, const ReadOptions& read_options,
TableCache* table_cache, InternalIterator* iter,
std::vector<std::unique_ptr<FragmentedRangeTombstoneIterator>>
range_del_iters,
FileMetaData* meta, std::vector<BlobFileAddition>* blob_file_additions,
std::vector<SequenceNumber> snapshots,
SequenceNumber earliest_write_conflict_snapshot,
SequenceNumber job_snapshot, SnapshotChecker* snapshot_checker,
bool paranoid_file_checks, InternalStats* internal_stats,
IOStatus* io_status, const std::shared_ptr<IOTracer>& io_tracer,
BlobFileCreationReason blob_creation_reason,
const SeqnoToTimeMapping& seqno_to_time_mapping, EventLogger* event_logger,
int job_id, const Env::IOPriority io_priority,
TableProperties* table_properties, Env::WriteLifeTimeHint write_hint,
const std::string* full_history_ts_low,
BlobFileCompletionCallback* blob_callback, Version* version,
uint64_t* num_input_entries, uint64_t* memtable_payload_bytes,
uint64_t* memtable_garbage_bytes) {
assert((tboptions.column_family_id ==
TablePropertiesCollectorFactory::Context::kUnknownColumnFamily) ==
tboptions.column_family_name.empty());
auto& mutable_cf_options = tboptions.moptions;
auto& ioptions = tboptions.ioptions;
// Reports the IOStats for flush for every following bytes.
const size_t kReportFlushIOStatsEvery = 1048576;
OutputValidator output_validator(
tboptions.internal_comparator,
/*enable_order_check=*/
mutable_cf_options.check_flush_compaction_key_order,
/*enable_hash=*/paranoid_file_checks);
Status s;
meta->fd.file_size = 0;
iter->SeekToFirst();
std::unique_ptr<CompactionRangeDelAggregator> range_del_agg(
new CompactionRangeDelAggregator(&tboptions.internal_comparator,
snapshots, full_history_ts_low));
uint64_t num_unfragmented_tombstones = 0;
uint64_t total_tombstone_payload_bytes = 0;
for (auto& range_del_iter : range_del_iters) {
num_unfragmented_tombstones +=
range_del_iter->num_unfragmented_tombstones();
total_tombstone_payload_bytes +=
range_del_iter->total_tombstone_payload_bytes();
range_del_agg->AddTombstones(std::move(range_del_iter));
}
std::string fname = TableFileName(ioptions.cf_paths, meta->fd.GetNumber(),
meta->fd.GetPathId());
std::vector<std::string> blob_file_paths;
std::string file_checksum = kUnknownFileChecksum;
std::string file_checksum_func_name = kUnknownFileChecksumFuncName;
EventHelpers::NotifyTableFileCreationStarted(ioptions.listeners, dbname,
tboptions.column_family_name,
fname, job_id, tboptions.reason);
Env* env = db_options.env;
assert(env);
FileSystem* fs = db_options.fs.get();
assert(fs);
TableProperties tp;
bool table_file_created = false;
if (iter->Valid() || !range_del_agg->IsEmpty()) {
std::unique_ptr<CompactionFilter> compaction_filter;
if (ioptions.compaction_filter_factory != nullptr &&
ioptions.compaction_filter_factory->ShouldFilterTableFileCreation(
tboptions.reason)) {
CompactionFilter::Context context;
context.is_full_compaction = false;
context.is_manual_compaction = false;
context.column_family_id = tboptions.column_family_id;
context.reason = tboptions.reason;
compaction_filter =
ioptions.compaction_filter_factory->CreateCompactionFilter(context);
if (compaction_filter != nullptr &&
!compaction_filter->IgnoreSnapshots()) {
s.PermitUncheckedError();
return Status::NotSupported(
"CompactionFilter::IgnoreSnapshots() = false is not supported "
"anymore.");
}
}
TableBuilder* builder;
std::unique_ptr<WritableFileWriter> file_writer;
{
std::unique_ptr<FSWritableFile> file;
#ifndef NDEBUG
bool use_direct_writes = file_options.use_direct_writes;
TEST_SYNC_POINT_CALLBACK("BuildTable:create_file", &use_direct_writes);
#endif // !NDEBUG
IOStatus io_s = NewWritableFile(fs, fname, &file, file_options);
assert(s.ok());
s = io_s;
if (io_status->ok()) {
*io_status = io_s;
}
if (!s.ok()) {
EventHelpers::LogAndNotifyTableFileCreationFinished(
event_logger, ioptions.listeners, dbname,
tboptions.column_family_name, fname, job_id, meta->fd,
kInvalidBlobFileNumber, tp, tboptions.reason, s, file_checksum,
file_checksum_func_name);
return s;
}
table_file_created = true;
FileTypeSet tmp_set = ioptions.checksum_handoff_file_types;
file->SetIOPriority(io_priority);
file->SetWriteLifeTimeHint(write_hint);
file_writer.reset(new WritableFileWriter(
std::move(file), fname, file_options, ioptions.clock, io_tracer,
ioptions.stats, ioptions.listeners,
ioptions.file_checksum_gen_factory.get(),
tmp_set.Contains(FileType::kTableFile), false));
builder = NewTableBuilder(tboptions, file_writer.get());
}
auto ucmp = tboptions.internal_comparator.user_comparator();
MergeHelper merge(
env, ucmp, ioptions.merge_operator.get(), compaction_filter.get(),
ioptions.logger, true /* internal key corruption is not ok */,
snapshots.empty() ? 0 : snapshots.back(), snapshot_checker);
std::unique_ptr<BlobFileBuilder> blob_file_builder(
(mutable_cf_options.enable_blob_files &&
tboptions.level_at_creation >=
mutable_cf_options.blob_file_starting_level &&
blob_file_additions)
? new BlobFileBuilder(
versions, fs, &ioptions, &mutable_cf_options, &file_options,
tboptions.db_id, tboptions.db_session_id, job_id,
tboptions.column_family_id, tboptions.column_family_name,
io_priority, write_hint, io_tracer, blob_callback,
blob_creation_reason, &blob_file_paths, blob_file_additions)
: nullptr);
const std::atomic<bool> kManualCompactionCanceledFalse{false};
CompactionIterator c_iter(
iter, ucmp, &merge, kMaxSequenceNumber, &snapshots,
earliest_write_conflict_snapshot, job_snapshot, snapshot_checker, env,
ShouldReportDetailedTime(env, ioptions.stats),
true /* internal key corruption is not ok */, range_del_agg.get(),
blob_file_builder.get(), ioptions.allow_data_in_errors,
ioptions.enforce_single_del_contracts,
/*manual_compaction_canceled=*/kManualCompactionCanceledFalse,
true /* must_count_input_entries */,
/*compaction=*/nullptr, compaction_filter.get(),
/*shutting_down=*/nullptr, db_options.info_log, full_history_ts_low);
const size_t ts_sz = ucmp->timestamp_size();
const bool strip_timestamp =
ts_sz > 0 && !ioptions.persist_user_defined_timestamps;
std::string key_after_flush_buf;
c_iter.SeekToFirst();
for (; c_iter.Valid(); c_iter.Next()) {
const Slice& key = c_iter.key();
const Slice& value = c_iter.value();
const ParsedInternalKey& ikey = c_iter.ikey();
Slice key_after_flush = key;
// If user defined timestamps will be stripped from user key after flush,
// the in memory version of the key act logically the same as one with a
// minimum timestamp. We update the timestamp here so file boundary and
// output validator, block builder all see the effect of the stripping.
if (strip_timestamp) {
key_after_flush_buf.clear();
ReplaceInternalKeyWithMinTimestamp(&key_after_flush_buf, key, ts_sz);
key_after_flush = key_after_flush_buf;
}
// Generate a rolling 64-bit hash of the key and values
// Note :
// Here "key" integrates 'sequence_number'+'kType'+'user key'.
s = output_validator.Add(key_after_flush, value);
if (!s.ok()) {
break;
}
builder->Add(key_after_flush, value);
s = meta->UpdateBoundaries(key_after_flush, value, ikey.sequence,
ikey.type);
if (!s.ok()) {
break;
}
// TODO(noetzli): Update stats after flush, too.
if (io_priority == Env::IO_HIGH &&
IOSTATS(bytes_written) >= kReportFlushIOStatsEvery) {
ThreadStatusUtil::SetThreadOperationProperty(
ThreadStatus::FLUSH_BYTES_WRITTEN, IOSTATS(bytes_written));
}
}
if (!s.ok()) {
c_iter.status().PermitUncheckedError();
} else if (!c_iter.status().ok()) {
s = c_iter.status();
}
if (s.ok()) {
auto range_del_it = range_del_agg->NewIterator();
Slice last_tombstone_start_user_key{};
for (range_del_it->SeekToFirst(); range_del_it->Valid();
range_del_it->Next()) {
auto tombstone = range_del_it->Tombstone();
auto kv = tombstone.Serialize();
// TODO(yuzhangyu): handle range deletion for UDT in memtables only.
builder->Add(kv.first.Encode(), kv.second);
InternalKey tombstone_end = tombstone.SerializeEndKey();
meta->UpdateBoundariesForRange(kv.first, tombstone_end, tombstone.seq_,
tboptions.internal_comparator);
if (version) {
if (last_tombstone_start_user_key.empty() ||
ucmp->CompareWithoutTimestamp(last_tombstone_start_user_key,
range_del_it->start_key()) < 0) {
SizeApproximationOptions approx_opts;
approx_opts.files_size_error_margin = 0.1;
meta->compensated_range_deletion_size += versions->ApproximateSize(
approx_opts, read_options, version, kv.first.Encode(),
tombstone_end.Encode(), 0 /* start_level */, -1 /* end_level */,
TableReaderCaller::kFlush);
}
last_tombstone_start_user_key = range_del_it->start_key();
}
}
}
TEST_SYNC_POINT("BuildTable:BeforeFinishBuildTable");
const bool empty = builder->IsEmpty();
if (num_input_entries != nullptr) {
assert(c_iter.HasNumInputEntryScanned());
*num_input_entries =
c_iter.NumInputEntryScanned() + num_unfragmented_tombstones;
}
if (!s.ok() || empty) {
builder->Abandon();
} else {
std::string seqno_time_mapping_str;
seqno_to_time_mapping.Encode(
seqno_time_mapping_str, meta->fd.smallest_seqno,
meta->fd.largest_seqno, meta->file_creation_time);
builder->SetSeqnoTimeTableProperties(
seqno_time_mapping_str,
ioptions.compaction_style == CompactionStyle::kCompactionStyleFIFO
? meta->file_creation_time
: meta->oldest_ancester_time);
s = builder->Finish();
}
if (io_status->ok()) {
*io_status = builder->io_status();
}
if (s.ok() && !empty) {
uint64_t file_size = builder->FileSize();
meta->fd.file_size = file_size;
meta->tail_size = builder->GetTailSize();
meta->marked_for_compaction = builder->NeedCompact();
meta->user_defined_timestamps_persisted =
ioptions.persist_user_defined_timestamps;
assert(meta->fd.GetFileSize() > 0);
tp = builder
->GetTableProperties(); // refresh now that builder is finished
if (memtable_payload_bytes != nullptr &&
memtable_garbage_bytes != nullptr) {
const CompactionIterationStats& ci_stats = c_iter.iter_stats();
uint64_t total_payload_bytes = ci_stats.total_input_raw_key_bytes +
ci_stats.total_input_raw_value_bytes +
total_tombstone_payload_bytes;
uint64_t total_payload_bytes_written =
(tp.raw_key_size + tp.raw_value_size);
// Prevent underflow, which may still happen at this point
// since we only support inserts, deletes, and deleteRanges.
if (total_payload_bytes_written <= total_payload_bytes) {
*memtable_payload_bytes = total_payload_bytes;
*memtable_garbage_bytes =
total_payload_bytes - total_payload_bytes_written;
} else {
*memtable_payload_bytes = 0;
*memtable_garbage_bytes = 0;
}
}
if (table_properties) {
*table_properties = tp;
}
}
delete builder;
// Finish and check for file errors
TEST_SYNC_POINT("BuildTable:BeforeSyncTable");
if (s.ok() && !empty) {
StopWatch sw(ioptions.clock, ioptions.stats, TABLE_SYNC_MICROS);
*io_status = file_writer->Sync(ioptions.use_fsync);
}
TEST_SYNC_POINT("BuildTable:BeforeCloseTableFile");
if (s.ok() && io_status->ok() && !empty) {
*io_status = file_writer->Close();
}
if (s.ok() && io_status->ok() && !empty) {
// Add the checksum information to file metadata.
meta->file_checksum = file_writer->GetFileChecksum();
meta->file_checksum_func_name = file_writer->GetFileChecksumFuncName();
file_checksum = meta->file_checksum;
file_checksum_func_name = meta->file_checksum_func_name;
// Set unique_id only if db_id and db_session_id exist
if (!tboptions.db_id.empty() && !tboptions.db_session_id.empty()) {
if (!GetSstInternalUniqueId(tboptions.db_id, tboptions.db_session_id,
meta->fd.GetNumber(), &(meta->unique_id))
.ok()) {
// if failed to get unique id, just set it Null
meta->unique_id = kNullUniqueId64x2;
}
}
}
if (s.ok()) {
s = *io_status;
}
// TODO(yuzhangyu): handle the key copy in the blob when ts should be
// stripped.
if (blob_file_builder) {
if (s.ok()) {
s = blob_file_builder->Finish();
} else {
blob_file_builder->Abandon(s);
}
blob_file_builder.reset();
}
// TODO Also check the IO status when create the Iterator.
TEST_SYNC_POINT("BuildTable:BeforeOutputValidation");
if (s.ok() && !empty) {
// 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,
// the goal is to cache it here for further user reads.
std::unique_ptr<InternalIterator> it(table_cache->NewIterator(
read_options, file_options, tboptions.internal_comparator, *meta,
nullptr /* range_del_agg */, mutable_cf_options.prefix_extractor,
nullptr,
(internal_stats == nullptr) ? nullptr
: internal_stats->GetFileReadHist(0),
TableReaderCaller::kFlush, /*arena=*/nullptr,
/*skip_filter=*/false, tboptions.level_at_creation,
MaxFileSizeForL0MetaPin(mutable_cf_options),
/*smallest_compaction_key=*/nullptr,
/*largest_compaction_key*/ nullptr,
/*allow_unprepared_value*/ false,
mutable_cf_options.block_protection_bytes_per_key));
s = it->status();
if (s.ok() && paranoid_file_checks) {
OutputValidator file_validator(tboptions.internal_comparator,
/*enable_order_check=*/true,
/*enable_hash=*/true);
for (it->SeekToFirst(); it->Valid(); it->Next()) {
// Generate a rolling 64-bit hash of the key and values
file_validator.Add(it->key(), it->value()).PermitUncheckedError();
}
s = it->status();
if (s.ok() && !output_validator.CompareValidator(file_validator)) {
s = Status::Corruption("Paranoid checksums do not match");
}
}
}
}
// Check for input iterator errors
if (!iter->status().ok()) {
s = iter->status();
}
if (!s.ok() || meta->fd.GetFileSize() == 0) {
TEST_SYNC_POINT("BuildTable:BeforeDeleteFile");
constexpr IODebugContext* dbg = nullptr;
if (table_file_created) {
Status ignored = fs->DeleteFile(fname, IOOptions(), dbg);
ignored.PermitUncheckedError();
}
assert(blob_file_additions || blob_file_paths.empty());
if (blob_file_additions) {
for (const std::string& blob_file_path : blob_file_paths) {
Status ignored = DeleteDBFile(&db_options, blob_file_path, dbname,
/*force_bg=*/false, /*force_fg=*/false);
ignored.PermitUncheckedError();
TEST_SYNC_POINT("BuildTable::AfterDeleteFile");
}
}
}
Status status_for_listener = s;
if (meta->fd.GetFileSize() == 0) {
fname = "(nil)";
if (s.ok()) {
status_for_listener = Status::Aborted("Empty SST file not kept");
}
}
// Output to event logger and fire events.
EventHelpers::LogAndNotifyTableFileCreationFinished(
event_logger, ioptions.listeners, dbname, tboptions.column_family_name,
fname, job_id, meta->fd, meta->oldest_blob_file_number, tp,
tboptions.reason, status_for_listener, file_checksum,
file_checksum_func_name);
return s;
}
} // namespace ROCKSDB_NAMESPACE
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