Revision 647eafdc21607c63e176bd3bed2f2cd51c66c258 authored by Yueh-Hsuan Chiang on 16 November 2016, 23:27:02 UTC, committed by Facebook Github Bot on 16 November 2016, 23:39:12 UTC
Summary: This diff includes an implementation of CompactionFilter that allows users to write CompactionFilter in Lua. With this ability, users can dynamically change compaction filter logic without requiring building the rocksdb binary and restarting the database. To compile, WITH_LUA_PATH must be specified to the base directory of lua. Closes https://github.com/facebook/rocksdb/pull/1478 Differential Revision: D4150138 Pulled By: yhchiang fbshipit-source-id: ed84222
1 parent 760ef68
DEFAULT_OPTIONS_HISTORY.md
# RocksDB default options change log
## 4.8.0 (5/2/2016)
* options.max_open_files changes from 5000 to -1. It improves performance, but users need to set file descriptor limit to be large enough and watch memory usage for index and bloom filters.
* options.base_background_compactions changes from max_background_compactions to 1. When users set higher max_background_compactions but the write throughput is not high, the writes are less spiky to disks.
* options.wal_recovery_mode changes from kTolerateCorruptedTailRecords to kPointInTimeRecovery. Avoid some false positive when file system or hardware reorder the writes for file data and metadata.
## 4.7.0 (4/8/2016)
* options.write_buffer_size changes from 4MB to 64MB.
* options.target_file_size_base changes from 2MB to 64MB.
* options.max_bytes_for_level_base changes from 10MB to 256MB.
* options.soft_pending_compaction_bytes_limit changes from 0 (disabled) to 64GB.
* options.hard_pending_compaction_bytes_limit changes from 0 (disabled) to 256GB.
* table_cache_numshardbits changes from 4 to 6.
* max_file_opening_threads changes from 1 to 16.
Computing file changes ...
