ad05cbb182
Summary: Before: > $ TEST_TMPDIR=/dev/shm ./db_bench -use_direct_reads=true -benchmarks=readrandomwriterandom -num=10000000 -reads=100000 -write_buffer_size=1048576 -target_file_size_base=1048576 -max_bytes_for_level_base=4194304 -max_background_jobs=12 -readwritepercent=50 -key_size=16 -value_size=48 -threads=32 DB path: [/dev/shm/dbbench] put error: IO error: While open a file for random read: /dev/shm/dbbench/000007.sst: Invalid argument put error: IO error: While open a file for random read: /dev/shm/dbbench/000007.sst: Invalid argument put error: IO error: While open a file for random read: /dev/shm/dbbench/000007.sst: Invalid argument put error: IO error: While open a file for random read: /dev/shm/dbbench/000007.sst: Invalid argument put error: IO error: While open a file for random read: /dev/shm/dbbench/000007.sst: Invalid argument put error: IO error: While open a file for random read: /dev/shm/dbbench/000007.sst: Invalid argument put error: IO error: While open a file for random read: /dev/shm/dbbench/000007.sst: Invalid argument put error: IO error: While open a file for random read: /dev/shm/dbbench/000007.sst: Invalid argument put error: IO error: While open a file for random read: /dev/shm/dbbench/000007.sst: Invalid argument db_bench: tpp.c:84: __pthread_tpp_change_priority: Assertion `new_prio == -1 || (new_prio >= fifo_min_prio && new_prio <= fifo_max_prio)' failed. put error: IO error: While open a file for random read: /dev/shm/dbbench/000007.sst: Invalid argument put error: IO error: While open a file for random read: /dev/shm/dbbench/000007.sst: Invalid argument After: > TEST_TMPDIR=/dev/shm ./db_bench -use_direct_reads=true -benchmarks=readrandomwriterandom -num=10000000 -reads=100000 -write_buffer_size=1048576 -target_file_size_base=1048576 -max_bytes_for_level_base=4194304 -max_background_jobs=12 -readwritepercent=50 -key_size=16 -value_size=48 -threads=32 Initializing RocksDB Options from the specified file Initializing RocksDB Options from command-line flags open error: Not implemented: Direct I/O is not supported by the specified DB. Closes https://github.com/facebook/rocksdb/pull/3539 Differential Revision: D7082658 Pulled By: miasantreble fbshipit-source-id: f9d9c6ec3b5e9e049cab52154940ee101ba4d342
RocksDB: A Persistent Key-Value Store for Flash and RAM Storage
RocksDB is developed and maintained by Facebook Database Engineering Team. It is built on earlier work on LevelDB by Sanjay Ghemawat (sanjay@google.com) and Jeff Dean (jeff@google.com)
This code is a library that forms the core building block for a fast key value server, especially suited for storing data on flash drives. It has a Log-Structured-Merge-Database (LSM) design with flexible tradeoffs between Write-Amplification-Factor (WAF), Read-Amplification-Factor (RAF) and Space-Amplification-Factor (SAF). It has multi-threaded compactions, making it specially suitable for storing multiple terabytes of data in a single database.
Start with example usage here: https://github.com/facebook/rocksdb/tree/master/examples
See the github wiki for more explanation.
The public interface is in include/. Callers should not include or
rely on the details of any other header files in this package. Those
internal APIs may be changed without warning.
Design discussions are conducted in https://www.facebook.com/groups/rocksdb.dev/