refactor rocksdb opts; split kvtree

Signed-off-by: Jason Volk <jason@zemos.net>
This commit is contained in:
Jason Volk 2024-04-06 08:48:41 -07:00 committed by June
parent bade4ed17f
commit a83da4f17b
3 changed files with 449 additions and 308 deletions

View file

@ -0,0 +1,197 @@
use std::{future::Future, pin::Pin, sync::Arc};
use rust_rocksdb::WriteBatchWithTransaction;
use super::{watchers::Watchers, Engine, KeyValueDatabaseEngine, KvTree};
use crate::{utils, Result};
pub(super) struct RocksDbEngineTree<'a> {
pub db: Arc<Engine>,
pub name: &'a str,
pub watchers: Watchers,
}
impl RocksDbEngineTree<'_> {
fn cf(&self) -> Arc<rust_rocksdb::BoundColumnFamily<'_>> { self.db.rocks.cf_handle(self.name).unwrap() }
}
impl KvTree for RocksDbEngineTree<'_> {
fn get(&self, key: &[u8]) -> Result<Option<Vec<u8>>> {
let mut readoptions = rust_rocksdb::ReadOptions::default();
readoptions.set_total_order_seek(true);
Ok(self.db.rocks.get_cf_opt(&self.cf(), key, &readoptions)?)
}
fn multi_get(
&self, iter: Vec<(&Arc<rust_rocksdb::BoundColumnFamily<'_>>, Vec<u8>)>,
) -> Vec<Result<Option<Vec<u8>>, rust_rocksdb::Error>> {
let mut readoptions = rust_rocksdb::ReadOptions::default();
readoptions.set_total_order_seek(true);
self.db.rocks.multi_get_cf_opt(iter, &readoptions)
}
fn insert(&self, key: &[u8], value: &[u8]) -> Result<()> {
let writeoptions = rust_rocksdb::WriteOptions::default();
self.db
.rocks
.put_cf_opt(&self.cf(), key, value, &writeoptions)?;
if !self.db.corked() {
self.db.flush()?;
}
self.watchers.wake(key);
Ok(())
}
fn insert_batch(&self, iter: &mut dyn Iterator<Item = (Vec<u8>, Vec<u8>)>) -> Result<()> {
let writeoptions = rust_rocksdb::WriteOptions::default();
let mut batch = WriteBatchWithTransaction::<false>::default();
for (key, value) in iter {
batch.put_cf(&self.cf(), key, value);
}
let result = self.db.rocks.write_opt(batch, &writeoptions);
if !self.db.corked() {
self.db.flush()?;
}
Ok(result?)
}
fn remove(&self, key: &[u8]) -> Result<()> {
let writeoptions = rust_rocksdb::WriteOptions::default();
let result = self.db.rocks.delete_cf_opt(&self.cf(), key, &writeoptions);
if !self.db.corked() {
self.db.flush()?;
}
Ok(result?)
}
fn remove_batch(&self, iter: &mut dyn Iterator<Item = Vec<u8>>) -> Result<()> {
let writeoptions = rust_rocksdb::WriteOptions::default();
let mut batch = WriteBatchWithTransaction::<false>::default();
for key in iter {
batch.delete_cf(&self.cf(), key);
}
let result = self.db.rocks.write_opt(batch, &writeoptions);
if !self.db.corked() {
self.db.flush()?;
}
Ok(result?)
}
fn iter<'a>(&'a self) -> Box<dyn Iterator<Item = (Vec<u8>, Vec<u8>)> + 'a> {
let mut readoptions = rust_rocksdb::ReadOptions::default();
readoptions.set_total_order_seek(true);
Box::new(
self.db
.rocks
.iterator_cf_opt(&self.cf(), readoptions, rust_rocksdb::IteratorMode::Start)
.map(Result::unwrap)
.map(|(k, v)| (Vec::from(k), Vec::from(v))),
)
}
fn iter_from<'a>(&'a self, from: &[u8], backwards: bool) -> Box<dyn Iterator<Item = (Vec<u8>, Vec<u8>)> + 'a> {
let mut readoptions = rust_rocksdb::ReadOptions::default();
readoptions.set_total_order_seek(true);
Box::new(
self.db
.rocks
.iterator_cf_opt(
&self.cf(),
readoptions,
rust_rocksdb::IteratorMode::From(
from,
if backwards {
rust_rocksdb::Direction::Reverse
} else {
rust_rocksdb::Direction::Forward
},
),
)
.map(Result::unwrap)
.map(|(k, v)| (Vec::from(k), Vec::from(v))),
)
}
fn increment(&self, key: &[u8]) -> Result<Vec<u8>> {
let mut readoptions = rust_rocksdb::ReadOptions::default();
readoptions.set_total_order_seek(true);
let writeoptions = rust_rocksdb::WriteOptions::default();
let old = self.db.rocks.get_cf_opt(&self.cf(), key, &readoptions)?;
let new = utils::increment(old.as_deref());
self.db
.rocks
.put_cf_opt(&self.cf(), key, &new, &writeoptions)?;
if !self.db.corked() {
self.db.flush()?;
}
Ok(new)
}
fn increment_batch(&self, iter: &mut dyn Iterator<Item = Vec<u8>>) -> Result<()> {
let mut readoptions = rust_rocksdb::ReadOptions::default();
readoptions.set_total_order_seek(true);
let writeoptions = rust_rocksdb::WriteOptions::default();
let mut batch = WriteBatchWithTransaction::<false>::default();
for key in iter {
let old = self.db.rocks.get_cf_opt(&self.cf(), &key, &readoptions)?;
let new = utils::increment(old.as_deref());
batch.put_cf(&self.cf(), key, new);
}
self.db.rocks.write_opt(batch, &writeoptions)?;
if !self.db.corked() {
self.db.flush()?;
}
Ok(())
}
fn scan_prefix<'a>(&'a self, prefix: Vec<u8>) -> Box<dyn Iterator<Item = (Vec<u8>, Vec<u8>)> + 'a> {
let mut readoptions = rust_rocksdb::ReadOptions::default();
readoptions.set_total_order_seek(true);
Box::new(
self.db
.rocks
.iterator_cf_opt(
&self.cf(),
readoptions,
rust_rocksdb::IteratorMode::From(&prefix, rust_rocksdb::Direction::Forward),
)
.map(Result::unwrap)
.map(|(k, v)| (Vec::from(k), Vec::from(v)))
.take_while(move |(k, _)| k.starts_with(&prefix)),
)
}
fn watch_prefix<'a>(&'a self, prefix: &[u8]) -> Pin<Box<dyn Future<Output = ()> + Send + 'a>> {
self.watchers.watch(prefix)
}
}

View file

@ -1,20 +1,22 @@
use std::{
future::Future,
pin::Pin,
sync::{atomic::AtomicU32, Arc},
};
use std::sync::{atomic::AtomicU32, Arc};
use chrono::{DateTime, Utc};
use rust_rocksdb::{
backup::{BackupEngine, BackupEngineOptions},
DBWithThreadMode as Db,
LogLevel::{Debug, Error, Fatal, Info, Warn},
MultiThreaded, WriteBatchWithTransaction,
DBWithThreadMode as Db, MultiThreaded,
};
use tracing::{debug, error, info, warn};
use super::{super::Config, watchers::Watchers, KeyValueDatabaseEngine, KvTree};
use crate::{utils, Result};
use crate::Result;
pub(crate) mod kvtree;
pub(crate) mod opts;
use kvtree::RocksDbEngineTree;
use opts::{cf_options, db_options};
use super::watchers;
pub(crate) struct Engine {
rocks: Db<MultiThreaded>,
@ -27,113 +29,6 @@ pub(crate) struct Engine {
corks: AtomicU32,
}
struct RocksDbEngineTree<'a> {
db: Arc<Engine>,
name: &'a str,
watchers: Watchers,
}
fn db_options(
config: &Config, env: &rust_rocksdb::Env, row_cache: &rust_rocksdb::Cache, col_cache: &rust_rocksdb::Cache,
) -> rust_rocksdb::Options {
// database options: https://docs.rs/rocksdb/latest/rocksdb/struct.Options.html#
let mut db_opts = rust_rocksdb::Options::default();
// Logging
let rocksdb_log_level = match config.rocksdb_log_level.as_ref() {
"debug" => Debug,
"info" => Info,
"warn" => Warn,
"fatal" => Fatal,
_ => Error,
};
db_opts.set_log_level(rocksdb_log_level);
db_opts.set_max_log_file_size(config.rocksdb_max_log_file_size);
db_opts.set_log_file_time_to_roll(config.rocksdb_log_time_to_roll);
db_opts.set_keep_log_file_num(config.rocksdb_max_log_files);
// Processing
let threads = if config.rocksdb_parallelism_threads == 0 {
num_cpus::get_physical() // max cores if user specified 0
} else {
config.rocksdb_parallelism_threads
};
db_opts.set_max_background_jobs(threads.try_into().unwrap());
db_opts.set_max_subcompactions(threads.try_into().unwrap());
// IO
db_opts.set_manual_wal_flush(true);
db_opts.set_use_direct_reads(true);
db_opts.set_use_direct_io_for_flush_and_compaction(true);
if config.rocksdb_optimize_for_spinning_disks {
db_opts.set_skip_stats_update_on_db_open(true); // speeds up opening DB on hard
// drives
}
// Blocks
let mut block_based_options = rust_rocksdb::BlockBasedOptions::default();
block_based_options.set_block_size(4 * 1024);
block_based_options.set_metadata_block_size(4 * 1024);
block_based_options.set_bloom_filter(9.6, true);
block_based_options.set_optimize_filters_for_memory(true);
block_based_options.set_cache_index_and_filter_blocks(true);
block_based_options.set_pin_top_level_index_and_filter(true);
block_based_options.set_block_cache(col_cache);
db_opts.set_row_cache(row_cache);
// Buffers
db_opts.set_write_buffer_size(2 * 1024 * 1024);
db_opts.set_max_write_buffer_number(2);
db_opts.set_min_write_buffer_number(1);
// Files
db_opts.set_level_zero_file_num_compaction_trigger(1);
db_opts.set_target_file_size_base(64 * 1024 * 1024);
db_opts.set_max_bytes_for_level_base(128 * 1024 * 1024);
db_opts.set_ttl(14 * 24 * 60 * 60);
// Compression
let rocksdb_compression_algo = match config.rocksdb_compression_algo.as_ref() {
"zlib" => rust_rocksdb::DBCompressionType::Zlib,
"lz4" => rust_rocksdb::DBCompressionType::Lz4,
"bz2" => rust_rocksdb::DBCompressionType::Bz2,
_ => rust_rocksdb::DBCompressionType::Zstd,
};
if config.rocksdb_bottommost_compression {
db_opts.set_bottommost_compression_type(rocksdb_compression_algo);
db_opts.set_bottommost_zstd_max_train_bytes(0, true);
// -14 w_bits is only read by zlib.
db_opts.set_bottommost_compression_options(-14, config.rocksdb_bottommost_compression_level, 0, 0, true);
}
// -14 w_bits is only read by zlib.
db_opts.set_compression_options(-14, config.rocksdb_compression_level, 0, 0);
db_opts.set_compression_type(rocksdb_compression_algo);
// Misc
db_opts.create_if_missing(true);
// Default: https://github.com/facebook/rocksdb/wiki/WAL-Recovery-Modes#ktoleratecorruptedtailrecords
//
// Unclean shutdowns of a Matrix homeserver are likely to be fine when
// recovered in this manner as it's likely any lost information will be
// restored via federation.
db_opts.set_wal_recovery_mode(match config.rocksdb_recovery_mode {
0 => rust_rocksdb::DBRecoveryMode::AbsoluteConsistency,
1 => rust_rocksdb::DBRecoveryMode::TolerateCorruptedTailRecords,
2 => rust_rocksdb::DBRecoveryMode::PointInTime,
3 => rust_rocksdb::DBRecoveryMode::SkipAnyCorruptedRecord,
4_u8..=u8::MAX => unimplemented!(),
});
db_opts.set_block_based_table_factory(&block_based_options);
db_opts.set_env(env);
db_opts
}
impl KeyValueDatabaseEngine for Arc<Engine> {
fn open(config: &Config) -> Result<Self> {
let cache_capacity_bytes = config.db_cache_capacity_mb * 1024.0 * 1024.0;
@ -145,9 +40,6 @@ impl KeyValueDatabaseEngine for Arc<Engine> {
let col_cache = rust_rocksdb::Cache::new_lru_cache(col_cache_capacity_bytes);
let db_opts = db_options(config, &db_env, &row_cache, &col_cache);
debug!("Listing column families in database");
let cfs = Db::<MultiThreaded>::list_cf(&db_opts, &config.database_path).unwrap_or_default();
if config.rocksdb_repair {
warn!("Starting database repair. This may take a long time...");
if let Err(e) = Db::<MultiThreaded>::repair(&db_opts, &config.database_path) {
@ -155,21 +47,23 @@ impl KeyValueDatabaseEngine for Arc<Engine> {
}
}
debug!("Opening {} column family descriptors in database", cfs.len());
info!("RocksDB database compaction will take place now, a delay in startup is expected");
debug!("Listing column families in database");
let cfs = Db::<MultiThreaded>::list_cf(&db_opts, &config.database_path).unwrap_or_default();
debug!("Opening {} column family descriptors in database", cfs.len());
let cfds = cfs
.iter()
.map(|name| rust_rocksdb::ColumnFamilyDescriptor::new(name, db_opts.clone()))
.map(|name| rust_rocksdb::ColumnFamilyDescriptor::new(name, cf_options(name, db_opts.clone(), config)))
.collect::<Vec<_>>();
debug!("Opening database...");
let db = if config.rocksdb_read_only {
Db::<MultiThreaded>::open_cf_for_read_only(&db_opts, &config.database_path, cfs.clone(), false)?
} else {
Db::<MultiThreaded>::open_cf_descriptors(&db_opts, &config.database_path, cfds)?
};
debug!("Opened database at sequence number {}", db.latest_sequence_number());
info!("Opened database at sequence number {}", db.latest_sequence_number());
Ok(Arc::new(Engine {
rocks: db,
row_cache,
@ -346,188 +240,3 @@ impl KeyValueDatabaseEngine for Arc<Engine> {
#[allow(dead_code)]
fn clear_caches(&self) {}
}
impl RocksDbEngineTree<'_> {
fn cf(&self) -> Arc<rust_rocksdb::BoundColumnFamily<'_>> { self.db.rocks.cf_handle(self.name).unwrap() }
}
impl KvTree for RocksDbEngineTree<'_> {
fn get(&self, key: &[u8]) -> Result<Option<Vec<u8>>> {
let mut readoptions = rust_rocksdb::ReadOptions::default();
readoptions.set_total_order_seek(true);
Ok(self.db.rocks.get_cf_opt(&self.cf(), key, &readoptions)?)
}
fn multi_get(
&self, iter: Vec<(&Arc<rust_rocksdb::BoundColumnFamily<'_>>, Vec<u8>)>,
) -> Vec<Result<Option<Vec<u8>>, rust_rocksdb::Error>> {
let mut readoptions = rust_rocksdb::ReadOptions::default();
readoptions.set_total_order_seek(true);
self.db.rocks.multi_get_cf_opt(iter, &readoptions)
}
fn insert(&self, key: &[u8], value: &[u8]) -> Result<()> {
let writeoptions = rust_rocksdb::WriteOptions::default();
self.db
.rocks
.put_cf_opt(&self.cf(), key, value, &writeoptions)?;
if !self.db.corked() {
self.db.flush()?;
}
self.watchers.wake(key);
Ok(())
}
fn insert_batch(&self, iter: &mut dyn Iterator<Item = (Vec<u8>, Vec<u8>)>) -> Result<()> {
let writeoptions = rust_rocksdb::WriteOptions::default();
let mut batch = WriteBatchWithTransaction::<false>::default();
for (key, value) in iter {
batch.put_cf(&self.cf(), key, value);
}
let result = self.db.rocks.write_opt(batch, &writeoptions);
if !self.db.corked() {
self.db.flush()?;
}
Ok(result?)
}
fn remove(&self, key: &[u8]) -> Result<()> {
let writeoptions = rust_rocksdb::WriteOptions::default();
let result = self.db.rocks.delete_cf_opt(&self.cf(), key, &writeoptions);
if !self.db.corked() {
self.db.flush()?;
}
Ok(result?)
}
fn remove_batch(&self, iter: &mut dyn Iterator<Item = Vec<u8>>) -> Result<()> {
let writeoptions = rust_rocksdb::WriteOptions::default();
let mut batch = WriteBatchWithTransaction::<false>::default();
for key in iter {
batch.delete_cf(&self.cf(), key);
}
let result = self.db.rocks.write_opt(batch, &writeoptions);
if !self.db.corked() {
self.db.flush()?;
}
Ok(result?)
}
fn iter<'a>(&'a self) -> Box<dyn Iterator<Item = (Vec<u8>, Vec<u8>)> + 'a> {
let mut readoptions = rust_rocksdb::ReadOptions::default();
readoptions.set_total_order_seek(true);
Box::new(
self.db
.rocks
.iterator_cf_opt(&self.cf(), readoptions, rust_rocksdb::IteratorMode::Start)
.map(Result::unwrap)
.map(|(k, v)| (Vec::from(k), Vec::from(v))),
)
}
fn iter_from<'a>(&'a self, from: &[u8], backwards: bool) -> Box<dyn Iterator<Item = (Vec<u8>, Vec<u8>)> + 'a> {
let mut readoptions = rust_rocksdb::ReadOptions::default();
readoptions.set_total_order_seek(true);
Box::new(
self.db
.rocks
.iterator_cf_opt(
&self.cf(),
readoptions,
rust_rocksdb::IteratorMode::From(
from,
if backwards {
rust_rocksdb::Direction::Reverse
} else {
rust_rocksdb::Direction::Forward
},
),
)
.map(Result::unwrap)
.map(|(k, v)| (Vec::from(k), Vec::from(v))),
)
}
fn increment(&self, key: &[u8]) -> Result<Vec<u8>> {
let mut readoptions = rust_rocksdb::ReadOptions::default();
readoptions.set_total_order_seek(true);
let writeoptions = rust_rocksdb::WriteOptions::default();
let old = self.db.rocks.get_cf_opt(&self.cf(), key, &readoptions)?;
let new = utils::increment(old.as_deref());
self.db
.rocks
.put_cf_opt(&self.cf(), key, &new, &writeoptions)?;
if !self.db.corked() {
self.db.flush()?;
}
Ok(new)
}
fn increment_batch(&self, iter: &mut dyn Iterator<Item = Vec<u8>>) -> Result<()> {
let mut readoptions = rust_rocksdb::ReadOptions::default();
readoptions.set_total_order_seek(true);
let writeoptions = rust_rocksdb::WriteOptions::default();
let mut batch = WriteBatchWithTransaction::<false>::default();
for key in iter {
let old = self.db.rocks.get_cf_opt(&self.cf(), &key, &readoptions)?;
let new = utils::increment(old.as_deref());
batch.put_cf(&self.cf(), key, new);
}
self.db.rocks.write_opt(batch, &writeoptions)?;
if !self.db.corked() {
self.db.flush()?;
}
Ok(())
}
fn scan_prefix<'a>(&'a self, prefix: Vec<u8>) -> Box<dyn Iterator<Item = (Vec<u8>, Vec<u8>)> + 'a> {
let mut readoptions = rust_rocksdb::ReadOptions::default();
readoptions.set_total_order_seek(true);
Box::new(
self.db
.rocks
.iterator_cf_opt(
&self.cf(),
readoptions,
rust_rocksdb::IteratorMode::From(&prefix, rust_rocksdb::Direction::Forward),
)
.map(Result::unwrap)
.map(|(k, v)| (Vec::from(k), Vec::from(v)))
.take_while(move |(k, _)| k.starts_with(&prefix)),
)
}
fn watch_prefix<'a>(&'a self, prefix: &[u8]) -> Pin<Box<dyn Future<Output = ()> + Send + 'a>> {
self.watchers.watch(prefix)
}
}

View file

@ -0,0 +1,235 @@
#![allow(dead_code)]
use rust_rocksdb::{
BlockBasedOptions, Cache, DBCompactionStyle, DBCompressionType, DBRecoveryMode, Env, LogLevel, Options,
UniversalCompactOptions, UniversalCompactionStopStyle,
};
use super::Config;
/// Create database-wide options suitable for opening the database. This also
/// sets our default column options in case of opening a column with the same
/// resulting value. Note that we require special per-column options on some
/// columns, therefor columns should only be opened after passing this result
/// through cf_options().
pub(crate) fn db_options(config: &Config, env: &Env, row_cache: &Cache, col_cache: &Cache) -> Options {
let mut opts = Options::default();
// Logging
set_logging_defaults(&mut opts, config);
// Processing
let threads = if config.rocksdb_parallelism_threads == 0 {
num_cpus::get_physical() // max cores if user specified 0
} else {
config.rocksdb_parallelism_threads
};
opts.set_max_background_jobs(threads.try_into().unwrap());
opts.set_max_subcompactions(threads.try_into().unwrap());
opts.set_max_file_opening_threads(0);
// IO
opts.set_manual_wal_flush(true);
opts.set_use_direct_reads(true);
opts.set_use_direct_io_for_flush_and_compaction(true);
if config.rocksdb_optimize_for_spinning_disks {
// speeds up opening DB on hard drives
opts.set_skip_checking_sst_file_sizes_on_db_open(true);
opts.set_skip_stats_update_on_db_open(true);
//opts.set_max_file_opening_threads(threads.try_into().unwrap());
}
// Blocks
let mut table_opts = table_options(config);
table_opts.set_block_cache(col_cache);
opts.set_row_cache(row_cache);
// Buffers
opts.set_write_buffer_size(2 * 1024 * 1024);
opts.set_max_write_buffer_number(2);
opts.set_min_write_buffer_number(1);
// Files
opts.set_max_total_wal_size(96 * 1024 * 1024);
opts.set_level_zero_file_num_compaction_trigger(2);
set_level_defaults(&mut opts, config);
opts.set_ttl(14 * 24 * 60 * 60);
// Compression
set_compression_defaults(&mut opts, config);
// Misc
opts.create_if_missing(true);
// Default: https://github.com/facebook/rocksdb/wiki/WAL-Recovery-Modes#ktoleratecorruptedtailrecords
//
// Unclean shutdowns of a Matrix homeserver are likely to be fine when
// recovered in this manner as it's likely any lost information will be
// restored via federation.
opts.set_wal_recovery_mode(match config.rocksdb_recovery_mode {
0 => DBRecoveryMode::AbsoluteConsistency,
1 => DBRecoveryMode::TolerateCorruptedTailRecords,
2 => DBRecoveryMode::PointInTime,
3 => DBRecoveryMode::SkipAnyCorruptedRecord,
4_u8..=u8::MAX => unimplemented!(),
});
opts.set_block_based_table_factory(&table_opts);
opts.set_env(env);
opts
}
/// Adjust options for the specific column by name. Provide the result of
/// db_options() as the argument to this function and use the return value in
/// the arguments to open the specific column.
pub(crate) fn cf_options(name: &str, mut opts: Options, config: &Config) -> Options {
match name {
"backupid_algorithm"
| "backupid_etag"
| "backupkeyid_backup"
| "roomid_shortroomid"
| "shorteventid_shortstatehash"
| "shorteventid_eventid"
| "shortstatekey_statekey"
| "shortstatehash_statediff"
| "userdevicetxnid_response"
| "userfilterid_filter" => set_for_sequential_small_uc(&mut opts, config),
&_ => {},
}
opts
}
fn set_logging_defaults(opts: &mut Options, config: &Config) {
let rocksdb_log_level = match config.rocksdb_log_level.as_ref() {
"debug" => LogLevel::Debug,
"info" => LogLevel::Info,
"warn" => LogLevel::Warn,
"fatal" => LogLevel::Fatal,
_ => LogLevel::Error,
};
opts.set_log_level(rocksdb_log_level);
opts.set_max_log_file_size(config.rocksdb_max_log_file_size);
opts.set_log_file_time_to_roll(config.rocksdb_log_time_to_roll);
opts.set_keep_log_file_num(config.rocksdb_max_log_files);
opts.set_stats_dump_period_sec(0);
}
fn set_compression_defaults(opts: &mut Options, config: &Config) {
let rocksdb_compression_algo = match config.rocksdb_compression_algo.as_ref() {
"zlib" => DBCompressionType::Zlib,
"lz4" => DBCompressionType::Lz4,
"bz2" => DBCompressionType::Bz2,
_ => DBCompressionType::Zstd,
};
if config.rocksdb_bottommost_compression {
opts.set_bottommost_compression_type(rocksdb_compression_algo);
opts.set_bottommost_zstd_max_train_bytes(0, true);
// -14 w_bits is only read by zlib.
opts.set_bottommost_compression_options(-14, config.rocksdb_bottommost_compression_level, 0, 0, true);
}
// -14 w_bits is only read by zlib.
opts.set_compression_options(-14, config.rocksdb_compression_level, 0, 0);
opts.set_compression_type(rocksdb_compression_algo);
}
fn set_for_random_small_uc(opts: &mut Options, config: &Config) {
let uco = uc_options(config);
set_for_random_small(opts, config);
opts.set_universal_compaction_options(&uco);
opts.set_compaction_style(DBCompactionStyle::Universal);
opts.set_level_zero_file_num_compaction_trigger(1);
}
fn set_for_sequential_small_uc(opts: &mut Options, config: &Config) {
let uco = uc_options(config);
set_for_sequential_small(opts, config);
opts.set_universal_compaction_options(&uco);
opts.set_compaction_style(DBCompactionStyle::Universal);
opts.set_level_zero_file_num_compaction_trigger(1);
}
fn set_for_random_small(opts: &mut Options, config: &Config) {
set_for_random(opts, config);
opts.set_write_buffer_size(1024 * 1024);
opts.set_target_file_size_base(65536);
opts.set_max_bytes_for_level_base(131072);
}
fn set_for_sequential_small(opts: &mut Options, config: &Config) {
set_for_random(opts, config);
opts.set_write_buffer_size(1024 * 1024);
opts.set_target_file_size_base(65536);
opts.set_max_bytes_for_level_base(131072);
}
fn set_for_random(opts: &mut Options, config: &Config) {
set_level_defaults(opts, config);
let pri = "compaction_pri=kOldestSmallestSeqFirst";
opts.set_options_from_string(pri)
.expect("set compaction priority string");
opts.set_max_bytes_for_level_base(8 * 1024 * 1024);
opts.set_max_bytes_for_level_multiplier(1.0);
opts.set_max_bytes_for_level_multiplier_additional(&[0, 1, 1, 3, 7, 15, 31]);
}
fn set_for_sequential(opts: &mut Options, config: &Config) {
set_level_defaults(opts, config);
let pri = "compaction_pri=kOldestLargestSeqFirst";
opts.set_options_from_string(pri)
.expect("set compaction priority string");
opts.set_target_file_size_base(2 * 1024 * 1024);
opts.set_target_file_size_multiplier(2);
opts.set_max_bytes_for_level_base(32 * 1024 * 1024);
opts.set_max_bytes_for_level_multiplier(1.0);
opts.set_max_bytes_for_level_multiplier_additional(&[0, 1, 1, 3, 7, 15, 31]);
}
fn set_level_defaults(opts: &mut Options, _config: &Config) {
opts.set_target_file_size_base(1024 * 1024);
opts.set_target_file_size_multiplier(2);
opts.set_level_compaction_dynamic_level_bytes(false);
opts.set_max_bytes_for_level_base(8 * 1024 * 1024);
opts.set_max_bytes_for_level_multiplier(2.0);
}
fn uc_options(_config: &Config) -> UniversalCompactOptions {
let mut opts = UniversalCompactOptions::default();
opts.set_stop_style(UniversalCompactionStopStyle::Total);
opts.set_max_size_amplification_percent(10000);
opts.set_compression_size_percent(-1);
opts.set_size_ratio(1);
opts.set_min_merge_width(2);
opts.set_max_merge_width(16);
opts
}
fn table_options(_config: &Config) -> BlockBasedOptions {
let mut opts = BlockBasedOptions::default();
opts.set_block_size(4 * 1024);
opts.set_metadata_block_size(4 * 1024);
opts.set_bloom_filter(9.6, true);
opts.set_optimize_filters_for_memory(true);
opts.set_cache_index_and_filter_blocks(true);
opts.set_pin_top_level_index_and_filter(true);
opts
}