rocksdb/util/options.cc
Siying Dong cd7c4143d7 Improve Write Stalling System
Summary:
Current write stalling system has the problem of lacking of positive feedback if the restricted rate is already too low. Users sometimes stack in very low slowdown value. With the diff, we add a positive feedback (increasing the slowdown value) if we recover from slowdown state back to normal. To avoid the positive feedback to keep the slowdown value to be to high, we add issue a negative feedback every time we are close to the stop condition. Experiments show it is easier to reach a relative balance than before.

Also increase level0_stop_writes_trigger default from 24 to 32. Since level0_slowdown_writes_trigger default is 20, stop trigger 24 only gives four files as the buffer time to slowdown writes. In order to avoid stop in four files while 20 files have been accumulated, the slowdown value must be very low, which is amost the same as stop. It also doesn't give enough time for the slowdown value to converge. Increase it to 32 will smooth out the system.
Closes https://github.com/facebook/rocksdb/pull/1562

Differential Revision: D4218519

Pulled By: siying

fbshipit-source-id: 95e4088
2016-11-23 09:24:15 -08:00

806 lines
34 KiB
C++

// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same 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 "rocksdb/options.h"
#ifndef __STDC_FORMAT_MACROS
#define __STDC_FORMAT_MACROS
#endif
#include <inttypes.h>
#include <limits>
#include "rocksdb/cache.h"
#include "rocksdb/compaction_filter.h"
#include "rocksdb/comparator.h"
#include "rocksdb/env.h"
#include "rocksdb/sst_file_manager.h"
#include "rocksdb/memtablerep.h"
#include "rocksdb/merge_operator.h"
#include "rocksdb/slice.h"
#include "rocksdb/slice_transform.h"
#include "rocksdb/table.h"
#include "rocksdb/table_properties.h"
#include "rocksdb/wal_filter.h"
#include "table/block_based_table_factory.h"
#include "util/compression.h"
#include "util/statistics.h"
#include "util/xfunc.h"
namespace rocksdb {
ColumnFamilyOptions::ColumnFamilyOptions()
: comparator(BytewiseComparator()),
merge_operator(nullptr),
compaction_filter(nullptr),
compaction_filter_factory(nullptr),
write_buffer_size(64 << 20),
max_write_buffer_number(2),
min_write_buffer_number_to_merge(1),
max_write_buffer_number_to_maintain(0),
compression(Snappy_Supported() ? kSnappyCompression : kNoCompression),
bottommost_compression(kDisableCompressionOption),
prefix_extractor(nullptr),
num_levels(7),
level0_file_num_compaction_trigger(4),
level0_slowdown_writes_trigger(20),
level0_stop_writes_trigger(32),
target_file_size_base(64 * 1048576),
target_file_size_multiplier(1),
max_bytes_for_level_base(256 * 1048576),
level_compaction_dynamic_level_bytes(false),
max_bytes_for_level_multiplier(10),
max_bytes_for_level_multiplier_additional(num_levels, 1),
max_compaction_bytes(0),
soft_rate_limit(0.0),
hard_rate_limit(0.0),
soft_pending_compaction_bytes_limit(64 * 1073741824ull),
hard_pending_compaction_bytes_limit(256 * 1073741824ull),
rate_limit_delay_max_milliseconds(1000),
arena_block_size(0),
disable_auto_compactions(false),
purge_redundant_kvs_while_flush(true),
compaction_style(kCompactionStyleLevel),
compaction_pri(kByCompensatedSize),
verify_checksums_in_compaction(true),
max_sequential_skip_in_iterations(8),
memtable_factory(std::shared_ptr<SkipListFactory>(new SkipListFactory)),
table_factory(
std::shared_ptr<TableFactory>(new BlockBasedTableFactory())),
inplace_update_support(false),
inplace_update_num_locks(10000),
inplace_callback(nullptr),
memtable_prefix_bloom_size_ratio(0.0),
memtable_huge_page_size(0),
memtable_insert_with_hint_prefix_extractor(nullptr),
bloom_locality(0),
max_successive_merges(0),
min_partial_merge_operands(2),
optimize_filters_for_hits(false),
paranoid_file_checks(false),
force_consistency_checks(false),
report_bg_io_stats(false) {
assert(memtable_factory.get() != nullptr);
}
ColumnFamilyOptions::ColumnFamilyOptions(const Options& options)
: comparator(options.comparator),
merge_operator(options.merge_operator),
compaction_filter(options.compaction_filter),
compaction_filter_factory(options.compaction_filter_factory),
write_buffer_size(options.write_buffer_size),
max_write_buffer_number(options.max_write_buffer_number),
min_write_buffer_number_to_merge(
options.min_write_buffer_number_to_merge),
max_write_buffer_number_to_maintain(
options.max_write_buffer_number_to_maintain),
compression(options.compression),
compression_per_level(options.compression_per_level),
bottommost_compression(options.bottommost_compression),
compression_opts(options.compression_opts),
prefix_extractor(options.prefix_extractor),
num_levels(options.num_levels),
level0_file_num_compaction_trigger(
options.level0_file_num_compaction_trigger),
level0_slowdown_writes_trigger(options.level0_slowdown_writes_trigger),
level0_stop_writes_trigger(options.level0_stop_writes_trigger),
target_file_size_base(options.target_file_size_base),
target_file_size_multiplier(options.target_file_size_multiplier),
max_bytes_for_level_base(options.max_bytes_for_level_base),
level_compaction_dynamic_level_bytes(
options.level_compaction_dynamic_level_bytes),
max_bytes_for_level_multiplier(options.max_bytes_for_level_multiplier),
max_bytes_for_level_multiplier_additional(
options.max_bytes_for_level_multiplier_additional),
max_compaction_bytes(options.max_compaction_bytes),
soft_rate_limit(options.soft_rate_limit),
soft_pending_compaction_bytes_limit(
options.soft_pending_compaction_bytes_limit),
hard_pending_compaction_bytes_limit(
options.hard_pending_compaction_bytes_limit),
rate_limit_delay_max_milliseconds(
options.rate_limit_delay_max_milliseconds),
arena_block_size(options.arena_block_size),
disable_auto_compactions(options.disable_auto_compactions),
purge_redundant_kvs_while_flush(options.purge_redundant_kvs_while_flush),
compaction_style(options.compaction_style),
compaction_pri(options.compaction_pri),
verify_checksums_in_compaction(options.verify_checksums_in_compaction),
compaction_options_universal(options.compaction_options_universal),
compaction_options_fifo(options.compaction_options_fifo),
max_sequential_skip_in_iterations(
options.max_sequential_skip_in_iterations),
memtable_factory(options.memtable_factory),
table_factory(options.table_factory),
table_properties_collector_factories(
options.table_properties_collector_factories),
inplace_update_support(options.inplace_update_support),
inplace_update_num_locks(options.inplace_update_num_locks),
inplace_callback(options.inplace_callback),
memtable_prefix_bloom_size_ratio(
options.memtable_prefix_bloom_size_ratio),
memtable_huge_page_size(options.memtable_huge_page_size),
memtable_insert_with_hint_prefix_extractor(
options.memtable_insert_with_hint_prefix_extractor),
bloom_locality(options.bloom_locality),
max_successive_merges(options.max_successive_merges),
min_partial_merge_operands(options.min_partial_merge_operands),
optimize_filters_for_hits(options.optimize_filters_for_hits),
paranoid_file_checks(options.paranoid_file_checks),
force_consistency_checks(options.force_consistency_checks),
report_bg_io_stats(options.report_bg_io_stats) {
assert(memtable_factory.get() != nullptr);
if (max_bytes_for_level_multiplier_additional.size() <
static_cast<unsigned int>(num_levels)) {
max_bytes_for_level_multiplier_additional.resize(num_levels, 1);
}
}
DBOptions::DBOptions()
: create_if_missing(false),
create_missing_column_families(false),
error_if_exists(false),
paranoid_checks(true),
env(Env::Default()),
rate_limiter(nullptr),
sst_file_manager(nullptr),
info_log(nullptr),
#ifdef NDEBUG
info_log_level(INFO_LEVEL),
#else
info_log_level(DEBUG_LEVEL),
#endif // NDEBUG
max_open_files(-1),
max_file_opening_threads(16),
max_total_wal_size(0),
statistics(nullptr),
disableDataSync(false),
use_fsync(false),
db_log_dir(""),
wal_dir(""),
delete_obsolete_files_period_micros(6ULL * 60 * 60 * 1000000),
base_background_compactions(1),
max_background_compactions(1),
max_subcompactions(1),
max_background_flushes(1),
max_log_file_size(0),
log_file_time_to_roll(0),
keep_log_file_num(1000),
recycle_log_file_num(0),
max_manifest_file_size(std::numeric_limits<uint64_t>::max()),
table_cache_numshardbits(6),
WAL_ttl_seconds(0),
WAL_size_limit_MB(0),
manifest_preallocation_size(4 * 1024 * 1024),
allow_os_buffer(true),
allow_mmap_reads(false),
allow_mmap_writes(false),
use_direct_reads(false),
allow_fallocate(true),
is_fd_close_on_exec(true),
skip_log_error_on_recovery(false),
stats_dump_period_sec(600),
advise_random_on_open(true),
db_write_buffer_size(0),
access_hint_on_compaction_start(NORMAL),
new_table_reader_for_compaction_inputs(false),
compaction_readahead_size(0),
random_access_max_buffer_size(1024 * 1024),
writable_file_max_buffer_size(1024 * 1024),
use_adaptive_mutex(false),
bytes_per_sync(0),
wal_bytes_per_sync(0),
listeners(),
enable_thread_tracking(false),
delayed_write_rate(2 * 1024U * 1024U),
allow_concurrent_memtable_write(true),
enable_write_thread_adaptive_yield(true),
write_thread_max_yield_usec(100),
write_thread_slow_yield_usec(3),
skip_stats_update_on_db_open(false),
wal_recovery_mode(WALRecoveryMode::kPointInTimeRecovery),
row_cache(nullptr),
#ifndef ROCKSDB_LITE
wal_filter(nullptr),
#endif // ROCKSDB_LITE
fail_if_options_file_error(false),
dump_malloc_stats(false),
avoid_flush_during_recovery(false),
avoid_flush_during_shutdown(false) {
}
DBOptions::DBOptions(const Options& options)
: create_if_missing(options.create_if_missing),
create_missing_column_families(options.create_missing_column_families),
error_if_exists(options.error_if_exists),
paranoid_checks(options.paranoid_checks),
env(options.env),
rate_limiter(options.rate_limiter),
sst_file_manager(options.sst_file_manager),
info_log(options.info_log),
info_log_level(options.info_log_level),
max_open_files(options.max_open_files),
max_file_opening_threads(options.max_file_opening_threads),
max_total_wal_size(options.max_total_wal_size),
statistics(options.statistics),
disableDataSync(options.disableDataSync),
use_fsync(options.use_fsync),
db_paths(options.db_paths),
db_log_dir(options.db_log_dir),
wal_dir(options.wal_dir),
delete_obsolete_files_period_micros(
options.delete_obsolete_files_period_micros),
base_background_compactions(options.base_background_compactions),
max_background_compactions(options.max_background_compactions),
max_subcompactions(options.max_subcompactions),
max_background_flushes(options.max_background_flushes),
max_log_file_size(options.max_log_file_size),
log_file_time_to_roll(options.log_file_time_to_roll),
keep_log_file_num(options.keep_log_file_num),
recycle_log_file_num(options.recycle_log_file_num),
max_manifest_file_size(options.max_manifest_file_size),
table_cache_numshardbits(options.table_cache_numshardbits),
WAL_ttl_seconds(options.WAL_ttl_seconds),
WAL_size_limit_MB(options.WAL_size_limit_MB),
manifest_preallocation_size(options.manifest_preallocation_size),
allow_os_buffer(options.allow_os_buffer),
allow_mmap_reads(options.allow_mmap_reads),
allow_mmap_writes(options.allow_mmap_writes),
use_direct_reads(options.use_direct_reads),
allow_fallocate(options.allow_fallocate),
is_fd_close_on_exec(options.is_fd_close_on_exec),
skip_log_error_on_recovery(options.skip_log_error_on_recovery),
stats_dump_period_sec(options.stats_dump_period_sec),
advise_random_on_open(options.advise_random_on_open),
db_write_buffer_size(options.db_write_buffer_size),
write_buffer_manager(options.write_buffer_manager),
access_hint_on_compaction_start(options.access_hint_on_compaction_start),
new_table_reader_for_compaction_inputs(
options.new_table_reader_for_compaction_inputs),
compaction_readahead_size(options.compaction_readahead_size),
random_access_max_buffer_size(options.random_access_max_buffer_size),
writable_file_max_buffer_size(options.writable_file_max_buffer_size),
use_adaptive_mutex(options.use_adaptive_mutex),
bytes_per_sync(options.bytes_per_sync),
wal_bytes_per_sync(options.wal_bytes_per_sync),
listeners(options.listeners),
enable_thread_tracking(options.enable_thread_tracking),
delayed_write_rate(options.delayed_write_rate),
allow_concurrent_memtable_write(options.allow_concurrent_memtable_write),
enable_write_thread_adaptive_yield(
options.enable_write_thread_adaptive_yield),
write_thread_max_yield_usec(options.write_thread_max_yield_usec),
write_thread_slow_yield_usec(options.write_thread_slow_yield_usec),
skip_stats_update_on_db_open(options.skip_stats_update_on_db_open),
wal_recovery_mode(options.wal_recovery_mode),
row_cache(options.row_cache),
#ifndef ROCKSDB_LITE
wal_filter(options.wal_filter),
#endif // ROCKSDB_LITE
fail_if_options_file_error(options.fail_if_options_file_error),
dump_malloc_stats(options.dump_malloc_stats),
avoid_flush_during_recovery(options.avoid_flush_during_recovery),
avoid_flush_during_shutdown(options.avoid_flush_during_shutdown) {
}
static const char* const access_hints[] = {
"NONE", "NORMAL", "SEQUENTIAL", "WILLNEED"
};
void DBOptions::Dump(Logger* log) const {
Header(log, " Options.error_if_exists: %d", error_if_exists);
Header(log, " Options.create_if_missing: %d", create_if_missing);
Header(log, " Options.paranoid_checks: %d", paranoid_checks);
Header(log, " Options.env: %p", env);
Header(log, " Options.info_log: %p", info_log.get());
Header(log, " Options.max_open_files: %d", max_open_files);
Header(log,
"Options.max_file_opening_threads: %d", max_file_opening_threads);
Header(log,
" Options.max_total_wal_size: %" PRIu64, max_total_wal_size);
Header(log, " Options.disableDataSync: %d", disableDataSync);
Header(log, " Options.use_fsync: %d", use_fsync);
Header(log, " Options.max_log_file_size: %" ROCKSDB_PRIszt,
max_log_file_size);
Header(log, "Options.max_manifest_file_size: %" PRIu64,
max_manifest_file_size);
Header(log, " Options.log_file_time_to_roll: %" ROCKSDB_PRIszt,
log_file_time_to_roll);
Header(log, " Options.keep_log_file_num: %" ROCKSDB_PRIszt,
keep_log_file_num);
Header(log, " Options.recycle_log_file_num: %" ROCKSDB_PRIszt,
recycle_log_file_num);
Header(log, " Options.allow_os_buffer: %d", allow_os_buffer);
Header(log, " Options.allow_mmap_reads: %d", allow_mmap_reads);
Header(log, " Options.allow_fallocate: %d", allow_fallocate);
Header(log, " Options.allow_mmap_writes: %d", allow_mmap_writes);
Header(log, " Options.use_direct_reads: %d", use_direct_reads);
Header(log, " Options.create_missing_column_families: %d",
create_missing_column_families);
Header(log, " Options.db_log_dir: %s",
db_log_dir.c_str());
Header(log, " Options.wal_dir: %s",
wal_dir.c_str());
Header(log, " Options.table_cache_numshardbits: %d",
table_cache_numshardbits);
Header(log, " Options.delete_obsolete_files_period_micros: %" PRIu64,
delete_obsolete_files_period_micros);
Header(log, " Options.base_background_compactions: %d",
base_background_compactions);
Header(log, " Options.max_background_compactions: %d",
max_background_compactions);
Header(log, " Options.max_subcompactions: %" PRIu32,
max_subcompactions);
Header(log, " Options.max_background_flushes: %d",
max_background_flushes);
Header(log, " Options.WAL_ttl_seconds: %" PRIu64,
WAL_ttl_seconds);
Header(log, " Options.WAL_size_limit_MB: %" PRIu64,
WAL_size_limit_MB);
Header(log,
" Options.manifest_preallocation_size: %" ROCKSDB_PRIszt,
manifest_preallocation_size);
Header(log, " Options.allow_os_buffer: %d",
allow_os_buffer);
Header(log, " Options.allow_mmap_reads: %d",
allow_mmap_reads);
Header(log, " Options.allow_mmap_writes: %d",
allow_mmap_writes);
Header(log, " Options.is_fd_close_on_exec: %d",
is_fd_close_on_exec);
Header(log, " Options.stats_dump_period_sec: %u",
stats_dump_period_sec);
Header(log, " Options.advise_random_on_open: %d",
advise_random_on_open);
Header(log,
" Options.db_write_buffer_size: %" ROCKSDB_PRIszt
"d",
db_write_buffer_size);
Header(log, " Options.access_hint_on_compaction_start: %s",
access_hints[access_hint_on_compaction_start]);
Header(log, " Options.new_table_reader_for_compaction_inputs: %d",
new_table_reader_for_compaction_inputs);
Header(log,
" Options.compaction_readahead_size: %" ROCKSDB_PRIszt
"d",
compaction_readahead_size);
Header(
log,
" Options.random_access_max_buffer_size: %" ROCKSDB_PRIszt
"d",
random_access_max_buffer_size);
Header(log,
" Options.writable_file_max_buffer_size: %" ROCKSDB_PRIszt
"d",
writable_file_max_buffer_size);
Header(log, " Options.use_adaptive_mutex: %d",
use_adaptive_mutex);
Header(log, " Options.rate_limiter: %p",
rate_limiter.get());
Header(
log, " Options.sst_file_manager.rate_bytes_per_sec: %" PRIi64,
sst_file_manager ? sst_file_manager->GetDeleteRateBytesPerSecond() : 0);
Header(log, " Options.bytes_per_sync: %" PRIu64,
bytes_per_sync);
Header(log, " Options.wal_bytes_per_sync: %" PRIu64,
wal_bytes_per_sync);
Header(log, " Options.wal_recovery_mode: %d",
wal_recovery_mode);
Header(log, " Options.enable_thread_tracking: %d",
enable_thread_tracking);
Header(log, " Options.allow_concurrent_memtable_write: %d",
allow_concurrent_memtable_write);
Header(log, " Options.enable_write_thread_adaptive_yield: %d",
enable_write_thread_adaptive_yield);
Header(log, " Options.write_thread_max_yield_usec: %" PRIu64,
write_thread_max_yield_usec);
Header(log, " Options.write_thread_slow_yield_usec: %" PRIu64,
write_thread_slow_yield_usec);
if (row_cache) {
Header(log, " Options.row_cache: %" PRIu64,
row_cache->GetCapacity());
} else {
Header(log, " Options.row_cache: None");
}
#ifndef ROCKSDB_LITE
Header(log, " Options.wal_filter: %s",
wal_filter ? wal_filter->Name() : "None");
#endif // ROCKDB_LITE
Header(log, " Options.avoid_flush_during_recovery: %d",
avoid_flush_during_recovery);
} // DBOptions::Dump
void ColumnFamilyOptions::Dump(Logger* log) const {
Header(log, " Options.comparator: %s", comparator->Name());
Header(log, " Options.merge_operator: %s",
merge_operator ? merge_operator->Name() : "None");
Header(log, " Options.compaction_filter: %s",
compaction_filter ? compaction_filter->Name() : "None");
Header(log, " Options.compaction_filter_factory: %s",
compaction_filter_factory ? compaction_filter_factory->Name() : "None");
Header(log, " Options.memtable_factory: %s", memtable_factory->Name());
Header(log, " Options.table_factory: %s", table_factory->Name());
Header(log, " table_factory options: %s",
table_factory->GetPrintableTableOptions().c_str());
Header(log, " Options.write_buffer_size: %" ROCKSDB_PRIszt,
write_buffer_size);
Header(log, " Options.max_write_buffer_number: %d", max_write_buffer_number);
if (!compression_per_level.empty()) {
for (unsigned int i = 0; i < compression_per_level.size(); i++) {
Header(log, " Options.compression[%d]: %s", i,
CompressionTypeToString(compression_per_level[i]).c_str());
}
} else {
Header(log, " Options.compression: %s",
CompressionTypeToString(compression).c_str());
}
Header(log, " Options.bottommost_compression: %s",
bottommost_compression == kDisableCompressionOption
? "Disabled"
: CompressionTypeToString(bottommost_compression).c_str());
Header(log, " Options.prefix_extractor: %s",
prefix_extractor == nullptr ? "nullptr" : prefix_extractor->Name());
Header(log, " Options.memtable_insert_with_hint_prefix_extractor: %s",
memtable_insert_with_hint_prefix_extractor == nullptr
? "nullptr"
: memtable_insert_with_hint_prefix_extractor->Name());
Header(log, " Options.num_levels: %d", num_levels);
Header(log, " Options.min_write_buffer_number_to_merge: %d",
min_write_buffer_number_to_merge);
Header(log, " Options.max_write_buffer_number_to_maintain: %d",
max_write_buffer_number_to_maintain);
Header(log, " Options.compression_opts.window_bits: %d",
compression_opts.window_bits);
Header(log, " Options.compression_opts.level: %d",
compression_opts.level);
Header(log, " Options.compression_opts.strategy: %d",
compression_opts.strategy);
Header(log,
" Options.compression_opts.max_dict_bytes: %" ROCKSDB_PRIszt,
compression_opts.max_dict_bytes);
Header(log, " Options.level0_file_num_compaction_trigger: %d",
level0_file_num_compaction_trigger);
Header(log, " Options.level0_slowdown_writes_trigger: %d",
level0_slowdown_writes_trigger);
Header(log, " Options.level0_stop_writes_trigger: %d",
level0_stop_writes_trigger);
Header(log, " Options.target_file_size_base: %" PRIu64,
target_file_size_base);
Header(log, " Options.target_file_size_multiplier: %d",
target_file_size_multiplier);
Header(log, " Options.max_bytes_for_level_base: %" PRIu64,
max_bytes_for_level_base);
Header(log, "Options.level_compaction_dynamic_level_bytes: %d",
level_compaction_dynamic_level_bytes);
Header(log, " Options.max_bytes_for_level_multiplier: %f",
max_bytes_for_level_multiplier);
for (size_t i = 0; i < max_bytes_for_level_multiplier_additional.size();
i++) {
Header(log,
"Options.max_bytes_for_level_multiplier_addtl[%" ROCKSDB_PRIszt
"]: %d",
i, max_bytes_for_level_multiplier_additional[i]);
}
Header(log, " Options.max_sequential_skip_in_iterations: %" PRIu64,
max_sequential_skip_in_iterations);
Header(log, " Options.max_compaction_bytes: %" PRIu64,
max_compaction_bytes);
Header(log,
" Options.arena_block_size: %" ROCKSDB_PRIszt,
arena_block_size);
Header(log, " Options.soft_pending_compaction_bytes_limit: %" PRIu64,
soft_pending_compaction_bytes_limit);
Header(log, " Options.hard_pending_compaction_bytes_limit: %" PRIu64,
hard_pending_compaction_bytes_limit);
Header(log, " Options.rate_limit_delay_max_milliseconds: %u",
rate_limit_delay_max_milliseconds);
Header(log, " Options.disable_auto_compactions: %d",
disable_auto_compactions);
Header(log, " Options.verify_checksums_in_compaction: %d",
verify_checksums_in_compaction);
Header(log, " Options.compaction_style: %d",
compaction_style);
Header(log, " Options.compaction_pri: %d",
compaction_pri);
Header(log, " Options.compaction_options_universal.size_ratio: %u",
compaction_options_universal.size_ratio);
Header(log, "Options.compaction_options_universal.min_merge_width: %u",
compaction_options_universal.min_merge_width);
Header(log, "Options.compaction_options_universal.max_merge_width: %u",
compaction_options_universal.max_merge_width);
Header(log, "Options.compaction_options_universal."
"max_size_amplification_percent: %u",
compaction_options_universal.max_size_amplification_percent);
Header(log,
"Options.compaction_options_universal.compression_size_percent: %d",
compaction_options_universal.compression_size_percent);
Header(log,
"Options.compaction_options_fifo.max_table_files_size: %" PRIu64,
compaction_options_fifo.max_table_files_size);
std::string collector_names;
for (const auto& collector_factory : table_properties_collector_factories) {
collector_names.append(collector_factory->Name());
collector_names.append("; ");
}
Header(log, " Options.table_properties_collectors: %s",
collector_names.c_str());
Header(log, " Options.inplace_update_support: %d",
inplace_update_support);
Header(log,
" Options.inplace_update_num_locks: %" ROCKSDB_PRIszt,
inplace_update_num_locks);
Header(log, " Options.min_partial_merge_operands: %u",
min_partial_merge_operands);
// TODO: easier config for bloom (maybe based on avg key/value size)
Header(log, " Options.memtable_prefix_bloom_size_ratio: %f",
memtable_prefix_bloom_size_ratio);
Header(log, " Options.memtable_huge_page_size: %" ROCKSDB_PRIszt,
memtable_huge_page_size);
Header(log, " Options.bloom_locality: %d",
bloom_locality);
Header(log,
" Options.max_successive_merges: %" ROCKSDB_PRIszt,
max_successive_merges);
Header(log, " Options.optimize_filters_for_hits: %d",
optimize_filters_for_hits);
Header(log, " Options.paranoid_file_checks: %d",
paranoid_file_checks);
Header(log, " Options.force_consistency_checks: %d",
force_consistency_checks);
Header(log, " Options.report_bg_io_stats: %d",
report_bg_io_stats);
} // ColumnFamilyOptions::Dump
void Options::Dump(Logger* log) const {
DBOptions::Dump(log);
ColumnFamilyOptions::Dump(log);
} // Options::Dump
void Options::DumpCFOptions(Logger* log) const {
ColumnFamilyOptions::Dump(log);
} // Options::DumpCFOptions
//
// The goal of this method is to create a configuration that
// allows an application to write all files into L0 and
// then do a single compaction to output all files into L1.
Options*
Options::PrepareForBulkLoad()
{
// never slowdown ingest.
level0_file_num_compaction_trigger = (1<<30);
level0_slowdown_writes_trigger = (1<<30);
level0_stop_writes_trigger = (1<<30);
soft_pending_compaction_bytes_limit = 0;
hard_pending_compaction_bytes_limit = 0;
// no auto compactions please. The application should issue a
// manual compaction after all data is loaded into L0.
disable_auto_compactions = true;
disableDataSync = true;
// A manual compaction run should pick all files in L0 in
// a single compaction run.
max_compaction_bytes = (static_cast<uint64_t>(1) << 60);
// It is better to have only 2 levels, otherwise a manual
// compaction would compact at every possible level, thereby
// increasing the total time needed for compactions.
num_levels = 2;
// Need to allow more write buffers to allow more parallism
// of flushes.
max_write_buffer_number = 6;
min_write_buffer_number_to_merge = 1;
// When compaction is disabled, more parallel flush threads can
// help with write throughput.
max_background_flushes = 4;
// Prevent a memtable flush to automatically promote files
// to L1. This is helpful so that all files that are
// input to the manual compaction are all at L0.
max_background_compactions = 2;
base_background_compactions = 2;
// The compaction would create large files in L1.
target_file_size_base = 256 * 1024 * 1024;
return this;
}
Options* Options::OptimizeForSmallDb() {
ColumnFamilyOptions::OptimizeForSmallDb();
DBOptions::OptimizeForSmallDb();
return this;
}
Options* Options::OldDefaults(int rocksdb_major_version,
int rocksdb_minor_version) {
ColumnFamilyOptions::OldDefaults(rocksdb_major_version,
rocksdb_minor_version);
DBOptions::OldDefaults(rocksdb_major_version, rocksdb_minor_version);
return this;
}
DBOptions* DBOptions::OldDefaults(int rocksdb_major_version,
int rocksdb_minor_version) {
if (rocksdb_major_version < 4 ||
(rocksdb_major_version == 4 && rocksdb_minor_version < 7)) {
max_file_opening_threads = 1;
table_cache_numshardbits = 4;
}
max_open_files = 5000;
base_background_compactions = -1;
wal_recovery_mode = WALRecoveryMode::kTolerateCorruptedTailRecords;
return this;
}
ColumnFamilyOptions* ColumnFamilyOptions::OldDefaults(
int rocksdb_major_version, int rocksdb_minor_version) {
if (rocksdb_major_version < 4 ||
(rocksdb_major_version == 4 && rocksdb_minor_version < 7)) {
write_buffer_size = 4 << 20;
target_file_size_base = 2 * 1048576;
max_bytes_for_level_base = 10 * 1048576;
soft_pending_compaction_bytes_limit = 0;
hard_pending_compaction_bytes_limit = 0;
}
if (rocksdb_major_version < 5) {
level0_stop_writes_trigger = 24;
}
compaction_pri = CompactionPri::kByCompensatedSize;
return this;
}
// Optimization functions
DBOptions* DBOptions::OptimizeForSmallDb() {
max_file_opening_threads = 1;
max_open_files = 5000;
return this;
}
ColumnFamilyOptions* ColumnFamilyOptions::OptimizeForSmallDb() {
write_buffer_size = 2 << 20;
target_file_size_base = 2 * 1048576;
max_bytes_for_level_base = 10 * 1048576;
soft_pending_compaction_bytes_limit = 256 * 1048576;
hard_pending_compaction_bytes_limit = 1073741824ul;
return this;
}
#ifndef ROCKSDB_LITE
ColumnFamilyOptions* ColumnFamilyOptions::OptimizeForPointLookup(
uint64_t block_cache_size_mb) {
prefix_extractor.reset(NewNoopTransform());
BlockBasedTableOptions block_based_options;
block_based_options.index_type = BlockBasedTableOptions::kHashSearch;
block_based_options.filter_policy.reset(NewBloomFilterPolicy(10));
block_based_options.block_cache =
NewLRUCache(static_cast<size_t>(block_cache_size_mb * 1024 * 1024));
table_factory.reset(new BlockBasedTableFactory(block_based_options));
memtable_factory.reset(NewHashLinkListRepFactory());
return this;
}
ColumnFamilyOptions* ColumnFamilyOptions::OptimizeLevelStyleCompaction(
uint64_t memtable_memory_budget) {
write_buffer_size = static_cast<size_t>(memtable_memory_budget / 4);
// merge two memtables when flushing to L0
min_write_buffer_number_to_merge = 2;
// this means we'll use 50% extra memory in the worst case, but will reduce
// write stalls.
max_write_buffer_number = 6;
// start flushing L0->L1 as soon as possible. each file on level0 is
// (memtable_memory_budget / 2). This will flush level 0 when it's bigger than
// memtable_memory_budget.
level0_file_num_compaction_trigger = 2;
// doesn't really matter much, but we don't want to create too many files
target_file_size_base = memtable_memory_budget / 8;
// make Level1 size equal to Level0 size, so that L0->L1 compactions are fast
max_bytes_for_level_base = memtable_memory_budget;
// level style compaction
compaction_style = kCompactionStyleLevel;
// only compress levels >= 2
compression_per_level.resize(num_levels);
for (int i = 0; i < num_levels; ++i) {
if (i < 2) {
compression_per_level[i] = kNoCompression;
} else {
compression_per_level[i] = kSnappyCompression;
}
}
return this;
}
ColumnFamilyOptions* ColumnFamilyOptions::OptimizeUniversalStyleCompaction(
uint64_t memtable_memory_budget) {
write_buffer_size = static_cast<size_t>(memtable_memory_budget / 4);
// merge two memtables when flushing to L0
min_write_buffer_number_to_merge = 2;
// this means we'll use 50% extra memory in the worst case, but will reduce
// write stalls.
max_write_buffer_number = 6;
// universal style compaction
compaction_style = kCompactionStyleUniversal;
compaction_options_universal.compression_size_percent = 80;
return this;
}
DBOptions* DBOptions::IncreaseParallelism(int total_threads) {
max_background_compactions = total_threads - 1;
max_background_flushes = 1;
env->SetBackgroundThreads(total_threads, Env::LOW);
env->SetBackgroundThreads(1, Env::HIGH);
return this;
}
#endif // !ROCKSDB_LITE
ReadOptions::ReadOptions()
: verify_checksums(true),
fill_cache(true),
snapshot(nullptr),
iterate_upper_bound(nullptr),
read_tier(kReadAllTier),
tailing(false),
managed(false),
total_order_seek(false),
prefix_same_as_start(false),
pin_data(false),
background_purge_on_iterator_cleanup(false),
readahead_size(0),
ignore_range_deletions(false) {
XFUNC_TEST("", "managed_options", managed_options, xf_manage_options,
reinterpret_cast<ReadOptions*>(this));
}
ReadOptions::ReadOptions(bool cksum, bool cache)
: verify_checksums(cksum),
fill_cache(cache),
snapshot(nullptr),
iterate_upper_bound(nullptr),
read_tier(kReadAllTier),
tailing(false),
managed(false),
total_order_seek(false),
prefix_same_as_start(false),
pin_data(false),
background_purge_on_iterator_cleanup(false),
readahead_size(0),
ignore_range_deletions(false) {
XFUNC_TEST("", "managed_options", managed_options, xf_manage_options,
reinterpret_cast<ReadOptions*>(this));
}
} // namespace rocksdb