diff --git a/conf/bk_server.conf b/conf/bk_server.conf index 1dfb8215245..58a1a895894 100644 --- a/conf/bk_server.conf +++ b/conf/bk_server.conf @@ -758,17 +758,31 @@ gcEntryLogMetadataCacheEnabled=false # How many entries to pre-fill in cache after a read cache miss # dbStorage_readAheadCacheBatchSize=100 +############################################################################# ## RocksDB specific configurations +############################################################################# ## DbLedgerStorage uses RocksDB to store the indexes from -## (ledgerId, entryId) -> (entryLog, offset) - +## (ledgerId, entryId) -> (entryLog, offset). This is called the entry location database. +## There's also a separate RocksDB database to to store the ledger metadata. +# +# RocksDB configuration can be applied in two ways: by using a configuration file +# or by setting individual properties. +# +# Most individual properties are applied only to the entry location database. +# To fine-tune the ledger metadata database, the configuration file method should be used. +# +# These properties apply to both entry location and ledger metadata databases +############################################################################# +# dbStorage_rocksDB_format_version=5 +# dbStorage_rocksDB_checksum_type=kxxHash +############################################################################# +# Entry location RocksDB database specific configurations: # Size of RocksDB block-cache. For best performance, this cache # should be big enough to hold a significant portion of the index # database which can reach ~2GB in some cases # Default is to use 10% / numberOfLedgers of the direct memory size # dbStorage_rocksDB_blockCacheSize= - -# Other RocksDB specific tunables +# Other RocksDB specific tunables for the entry location database # dbStorage_rocksDB_writeBufferSizeMB=64 # dbStorage_rocksDB_sstSizeInMB=64 # dbStorage_rocksDB_blockSize=65536 @@ -777,7 +791,12 @@ gcEntryLogMetadataCacheEnabled=false # dbStorage_rocksDB_numFilesInLevel0=4 # dbStorage_rocksDB_maxSizeInLevel1MB=256 # dbStorage_rocksDB_logPath= -# dbStorage_rocksDB_format_version=5 +############################################################################# +# Alternative RocksDB configuration by using configuration files. +############################################################################# +# entryLocationRocksdbConf=conf/entry_location_rocksdb.conf +# ledgerMetadataRocksdbConf=conf/ledger_metadata_rocksdb.conf +# defaultRocksdbConf=conf/default_rocksdb.conf ############################################################################# ## DirectIO entry logger configuration