andreacavalli/rocksdb
0
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
7d817268b9
rocksdb/util/options.cc
Venkatesh Radhakrishnan 7d817268b9 Managed iterator 
Summary:
This is a diff for managed iterator. A managed iterator
is a wrapper around an iterator which saves the options for that
iterator as well as the current key/value so that the underlying iterator
and its associated memory can be released when it is aged out
automatically or on the request of the user. Will provide the automatic release as a follow-up diff.

Test Plan: Managed* tests in db_test and XF tests for managed iterator

Reviewers: igor, yhchiang, anthony, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D31401
2015-02-18 11:49:31 -08:00

630 lines
27 KiB
C++
Raw Blame History

// Copyright (c) 2013, 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"
#include "rocksdb/immutable_options.h"
#ifndef __STDC_FORMAT_MACROS
#define __STDC_FORMAT_MACROS
#endif
#include <inttypes.h>
#include <limits>
#include "db/writebuffer.h"
#include "rocksdb/cache.h"
#include "rocksdb/compaction_filter.h"
#include "rocksdb/comparator.h"
#include "rocksdb/env.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 "table/block_based_table_factory.h"
#include "util/statistics.h"
#include "util/xfunc.h"
namespace rocksdb {
ImmutableCFOptions::ImmutableCFOptions(const Options& options)
: compaction_style(options.compaction_style),
compaction_options_universal(options.compaction_options_universal),
compaction_options_fifo(options.compaction_options_fifo),
prefix_extractor(options.prefix_extractor.get()),
comparator(options.comparator),
merge_operator(options.merge_operator.get()),
compaction_filter(options.compaction_filter),
compaction_filter_factory(options.compaction_filter_factory.get()),
compaction_filter_factory_v2(options.compaction_filter_factory_v2.get()),
inplace_update_support(options.inplace_update_support),
inplace_callback(options.inplace_callback),
info_log(options.info_log.get()),
statistics(options.statistics.get()),
env(options.env),
allow_mmap_reads(options.allow_mmap_reads),
allow_mmap_writes(options.allow_mmap_writes),
db_paths(options.db_paths),
memtable_factory(options.memtable_factory.get()),
table_factory(options.table_factory.get()),
table_properties_collector_factories(
options.table_properties_collector_factories),
advise_random_on_open(options.advise_random_on_open),
bloom_locality(options.bloom_locality),
purge_redundant_kvs_while_flush(options.purge_redundant_kvs_while_flush),
min_partial_merge_operands(options.min_partial_merge_operands),
disable_data_sync(options.disableDataSync),
use_fsync(options.use_fsync),
compression(options.compression),
compression_per_level(options.compression_per_level),
compression_opts(options.compression_opts),
access_hint_on_compaction_start(options.access_hint_on_compaction_start),
num_levels(options.num_levels)
#ifndef ROCKSDB_LITE
, listeners(options.listeners) {}
#else // ROCKSDB_LITE
{}
#endif // ROCKSDB_LITE
ColumnFamilyOptions::ColumnFamilyOptions()
: comparator(BytewiseComparator()),
merge_operator(nullptr),
compaction_filter(nullptr),
compaction_filter_factory(std::shared_ptr<CompactionFilterFactory>(
new DefaultCompactionFilterFactory())),
compaction_filter_factory_v2(new DefaultCompactionFilterFactoryV2()),
write_buffer_size(4 << 20),
max_write_buffer_number(2),
min_write_buffer_number_to_merge(1),
compression(kSnappyCompression),
prefix_extractor(nullptr),
num_levels(7),
level0_file_num_compaction_trigger(4),
level0_slowdown_writes_trigger(20),
level0_stop_writes_trigger(24),
max_mem_compaction_level(2),
target_file_size_base(2 * 1048576),
target_file_size_multiplier(1),
max_bytes_for_level_base(10 * 1048576),
max_bytes_for_level_multiplier(10),
max_bytes_for_level_multiplier_additional(num_levels, 1),
expanded_compaction_factor(25),
source_compaction_factor(1),
max_grandparent_overlap_factor(10),
soft_rate_limit(0.0),
hard_rate_limit(0.0),
rate_limit_delay_max_milliseconds(1000),
arena_block_size(0),
disable_auto_compactions(false),
purge_redundant_kvs_while_flush(true),
compaction_style(kCompactionStyleLevel),
verify_checksums_in_compaction(true),
filter_deletes(false),
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_bits(0),
memtable_prefix_bloom_probes(6),
memtable_prefix_bloom_huge_page_tlb_size(0),
bloom_locality(0),
max_successive_merges(0),
min_partial_merge_operands(2)
#ifndef ROCKSDB_LITE
, listeners() {
#else // ROCKSDB_LITE
{
#endif // ROCKSDB_LITE
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),
compaction_filter_factory_v2(options.compaction_filter_factory_v2),
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),
compression(options.compression),
compression_per_level(options.compression_per_level),
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),
max_mem_compaction_level(options.max_mem_compaction_level),
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),
max_bytes_for_level_multiplier(options.max_bytes_for_level_multiplier),
max_bytes_for_level_multiplier_additional(
options.max_bytes_for_level_multiplier_additional),
expanded_compaction_factor(options.expanded_compaction_factor),
source_compaction_factor(options.source_compaction_factor),
max_grandparent_overlap_factor(options.max_grandparent_overlap_factor),
soft_rate_limit(options.soft_rate_limit),
hard_rate_limit(options.hard_rate_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),
verify_checksums_in_compaction(options.verify_checksums_in_compaction),
compaction_options_universal(options.compaction_options_universal),
compaction_options_fifo(options.compaction_options_fifo),
filter_deletes(options.filter_deletes),
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_bits(options.memtable_prefix_bloom_bits),
memtable_prefix_bloom_probes(options.memtable_prefix_bloom_probes),
memtable_prefix_bloom_huge_page_tlb_size(
options.memtable_prefix_bloom_huge_page_tlb_size),
bloom_locality(options.bloom_locality),
max_successive_merges(options.max_successive_merges),
min_partial_merge_operands(options.min_partial_merge_operands)
#ifndef ROCKSDB_LITE
, listeners(options.listeners) {
#else // ROCKSDB_LITE
{
#endif // ROCKSDB_LITE
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),
info_log(nullptr),
#ifdef NDEBUG
info_log_level(INFO_LEVEL),
#else
info_log_level(DEBUG_LEVEL),
#endif // NDEBUG
max_open_files(5000),
max_total_wal_size(0),
statistics(nullptr),
disableDataSync(false),
use_fsync(false),
db_log_dir(""),
wal_dir(""),
delete_obsolete_files_period_micros(6 * 60 * 60 * 1000000UL),
max_background_compactions(1),
max_background_flushes(1),
max_log_file_size(0),
log_file_time_to_roll(0),
keep_log_file_num(1000),
max_manifest_file_size(std::numeric_limits<uint64_t>::max()),
table_cache_numshardbits(4),
table_cache_remove_scan_count_limit(16),
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),
is_fd_close_on_exec(true),
skip_log_error_on_recovery(false),
stats_dump_period_sec(3600),
advise_random_on_open(true),
db_write_buffer_size(0),
access_hint_on_compaction_start(NORMAL),
use_adaptive_mutex(false),
bytes_per_sync(0),
enable_thread_tracking(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),
info_log(options.info_log),
info_log_level(options.info_log_level),
max_open_files(options.max_open_files),
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),
max_background_compactions(options.max_background_compactions),
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),
max_manifest_file_size(options.max_manifest_file_size),
table_cache_numshardbits(options.table_cache_numshardbits),
table_cache_remove_scan_count_limit(
options.table_cache_remove_scan_count_limit),
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),
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),
access_hint_on_compaction_start(options.access_hint_on_compaction_start),
use_adaptive_mutex(options.use_adaptive_mutex),
bytes_per_sync(options.bytes_per_sync),
enable_thread_tracking(options.enable_thread_tracking) {}
static const char* const access_hints[] = {
"NONE", "NORMAL", "SEQUENTIAL", "WILLNEED"
};
void DBOptions::Dump(Logger* log) const {
Log(log," Options.error_if_exists: %d", error_if_exists);
Log(log," Options.create_if_missing: %d", create_if_missing);
Log(log," Options.paranoid_checks: %d", paranoid_checks);
Log(log," Options.env: %p", env);
Log(log," Options.info_log: %p", info_log.get());
Log(log," Options.max_open_files: %d", max_open_files);
Log(log," Options.max_total_wal_size: %" PRIu64, max_total_wal_size);
Log(log, " Options.disableDataSync: %d", disableDataSync);
Log(log, " Options.use_fsync: %d", use_fsync);
Log(log, " Options.max_log_file_size: %zu", max_log_file_size);
Log(log, "Options.max_manifest_file_size: %" PRIu64,
max_manifest_file_size);
Log(log, " Options.log_file_time_to_roll: %zu", log_file_time_to_roll);
Log(log, " Options.keep_log_file_num: %zu", keep_log_file_num);
Log(log, " Options.allow_os_buffer: %d", allow_os_buffer);
Log(log, " Options.allow_mmap_reads: %d", allow_mmap_reads);
Log(log, " Options.allow_mmap_writes: %d", allow_mmap_writes);
Log(log, " Options.create_missing_column_families: %d",
create_missing_column_families);
Log(log, " Options.db_log_dir: %s",
db_log_dir.c_str());
Log(log, " Options.wal_dir: %s",
wal_dir.c_str());
Log(log, " Options.table_cache_numshardbits: %d",
table_cache_numshardbits);
Log(log, " Options.table_cache_remove_scan_count_limit: %d",
table_cache_remove_scan_count_limit);
Log(log, " Options.delete_obsolete_files_period_micros: %" PRIu64,
delete_obsolete_files_period_micros);
Log(log, " Options.max_background_compactions: %d",
max_background_compactions);
Log(log, " Options.max_background_flushes: %d",
max_background_flushes);
Log(log, " Options.WAL_ttl_seconds: %" PRIu64,
WAL_ttl_seconds);
Log(log, " Options.WAL_size_limit_MB: %" PRIu64,
WAL_size_limit_MB);
Log(log, " Options.manifest_preallocation_size: %zu",
manifest_preallocation_size);
Log(log, " Options.allow_os_buffer: %d",
allow_os_buffer);
Log(log, " Options.allow_mmap_reads: %d",
allow_mmap_reads);
Log(log, " Options.allow_mmap_writes: %d",
allow_mmap_writes);
Log(log, " Options.is_fd_close_on_exec: %d",
is_fd_close_on_exec);
Log(log, " Options.stats_dump_period_sec: %u",
stats_dump_period_sec);
Log(log, " Options.advise_random_on_open: %d",
advise_random_on_open);
Log(log, " Options.db_write_buffer_size: %zd",
db_write_buffer_size);
Log(log, " Options.access_hint_on_compaction_start: %s",
access_hints[access_hint_on_compaction_start]);
Log(log, " Options.use_adaptive_mutex: %d",
use_adaptive_mutex);
Log(log, " Options.rate_limiter: %p",
rate_limiter.get());
Log(log, " Options.bytes_per_sync: %" PRIu64,
bytes_per_sync);
Log(log, " enable_thread_tracking: %d",
enable_thread_tracking);
} // DBOptions::Dump
void ColumnFamilyOptions::Dump(Logger* log) const {
Log(log, " Options.comparator: %s", comparator->Name());
Log(log, " Options.merge_operator: %s",
merge_operator ? merge_operator->Name() : "None");
Log(log, " Options.compaction_filter: %s",
compaction_filter ? compaction_filter->Name() : "None");
Log(log, " Options.compaction_filter_factory: %s",
compaction_filter_factory->Name());
Log(log, " Options.compaction_filter_factory_v2: %s",
compaction_filter_factory_v2->Name());
Log(log, " Options.memtable_factory: %s", memtable_factory->Name());
Log(log, " Options.table_factory: %s", table_factory->Name());
Log(log, " table_factory options: %s",
table_factory->GetPrintableTableOptions().c_str());
Log(log, " Options.write_buffer_size: %zd", write_buffer_size);
Log(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++) {
Log(log," Options.compression[%d]: %d",
i, compression_per_level[i]);
}
} else {
Log(log," Options.compression: %d", compression);
}
Log(log," Options.prefix_extractor: %s",
prefix_extractor == nullptr ? "nullptr" : prefix_extractor->Name());
Log(log," Options.num_levels: %d", num_levels);
Log(log," Options.min_write_buffer_number_to_merge: %d",
min_write_buffer_number_to_merge);
Log(log," Options.purge_redundant_kvs_while_flush: %d",
purge_redundant_kvs_while_flush);
Log(log," Options.compression_opts.window_bits: %d",
compression_opts.window_bits);
Log(log," Options.compression_opts.level: %d",
compression_opts.level);
Log(log," Options.compression_opts.strategy: %d",
compression_opts.strategy);
Log(log," Options.level0_file_num_compaction_trigger: %d",
level0_file_num_compaction_trigger);
Log(log," Options.level0_slowdown_writes_trigger: %d",
level0_slowdown_writes_trigger);
Log(log," Options.level0_stop_writes_trigger: %d",
level0_stop_writes_trigger);
Log(log," Options.max_mem_compaction_level: %d",
max_mem_compaction_level);
Log(log," Options.target_file_size_base: %" PRIu64,
target_file_size_base);
Log(log," Options.target_file_size_multiplier: %d",
target_file_size_multiplier);
Log(log," Options.max_bytes_for_level_base: %" PRIu64,
max_bytes_for_level_base);
Log(log," Options.max_bytes_for_level_multiplier: %d",
max_bytes_for_level_multiplier);
for (int i = 0; i < num_levels; i++) {
Log(log,"Options.max_bytes_for_level_multiplier_addtl[%d]: %d",
i, max_bytes_for_level_multiplier_additional[i]);
}
Log(log," Options.max_sequential_skip_in_iterations: %" PRIu64,
max_sequential_skip_in_iterations);
Log(log," Options.expanded_compaction_factor: %d",
expanded_compaction_factor);
Log(log," Options.source_compaction_factor: %d",
source_compaction_factor);
Log(log," Options.max_grandparent_overlap_factor: %d",
max_grandparent_overlap_factor);
Log(log," Options.arena_block_size: %zu",
arena_block_size);
Log(log," Options.soft_rate_limit: %.2f",
soft_rate_limit);
Log(log," Options.hard_rate_limit: %.2f",
hard_rate_limit);
Log(log," Options.rate_limit_delay_max_milliseconds: %u",
rate_limit_delay_max_milliseconds);
Log(log," Options.disable_auto_compactions: %d",
disable_auto_compactions);
Log(log," Options.purge_redundant_kvs_while_flush: %d",
purge_redundant_kvs_while_flush);
Log(log," Options.filter_deletes: %d",
filter_deletes);
Log(log, " Options.verify_checksums_in_compaction: %d",
verify_checksums_in_compaction);
Log(log," Options.compaction_style: %d",
compaction_style);
Log(log," Options.compaction_options_universal.size_ratio: %u",
compaction_options_universal.size_ratio);
Log(log,"Options.compaction_options_universal.min_merge_width: %u",
compaction_options_universal.min_merge_width);
Log(log,"Options.compaction_options_universal.max_merge_width: %u",
compaction_options_universal.max_merge_width);
Log(log,"Options.compaction_options_universal."
"max_size_amplification_percent: %u",
compaction_options_universal.max_size_amplification_percent);
Log(log,
"Options.compaction_options_universal.compression_size_percent: %d",
compaction_options_universal.compression_size_percent);
Log(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("; ");
}
Log(log, " Options.table_properties_collectors: %s",
collector_names.c_str());
Log(log, " Options.inplace_update_support: %d",
inplace_update_support);
Log(log, " Options.inplace_update_num_locks: %zd",
inplace_update_num_locks);
Log(log, " Options.min_partial_merge_operands: %u",
min_partial_merge_operands);
// TODO: easier config for bloom (maybe based on avg key/value size)
Log(log, " Options.memtable_prefix_bloom_bits: %d",
memtable_prefix_bloom_bits);
Log(log, " Options.memtable_prefix_bloom_probes: %d",
memtable_prefix_bloom_probes);
Log(log, " Options.memtable_prefix_bloom_huge_page_tlb_size: %zu",
memtable_prefix_bloom_huge_page_tlb_size);
Log(log, " Options.bloom_locality: %d",
bloom_locality);
Log(log, " Options.max_successive_merges: %zd",
max_successive_merges);
} // ColumnFamilyOptions::Dump
void Options::Dump(Logger* log) const {
DBOptions::Dump(log);
ColumnFamilyOptions::Dump(log);
} // Options::Dump
//
// 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);
// 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.
source_compaction_factor = (1<<30);
// 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;
// The compaction would create large files in L1.
target_file_size_base = 256 * 1024 * 1024;
return this;
}
#ifndef ROCKSDB_LITE
// Optimization functions
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;
}
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) {
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) {
XFUNC_TEST("", "managed_options", managed_options, xf_manage_options,
reinterpret_cast<ReadOptions*>(this));
}
#endif // ROCKSDB_LITE
} // namespace rocksdb
Reference in New Issue View Git Blame Copy Permalink