These are experimental features, don't use them in production environment.
make ROCKSDB_ON_DCPMM=1 install-static -j
To avoid page-fault and page-zeroing overhead on pmem
usage:
options.recycle_dcpmm_sst = true;
usage:
options.env = rocksdb::NewDCPMMEnv(rocksdb::DCPMMEnvOptions());
allocate values with libpmemobj
usage:
options.env = rocksdb::NewDCPMMEnv(rocksdb::DCPMMEnvOptions());
options.dcpmm_kvs_enable = true;
options.dcpmm_kvs_mmapped_file_fullpath = {path to libpmemobj file};
options.dcpmm_kvs_mmapped_file_size = {libpmemobj file size};
options.dcpmm_kvs_value_thres = 64; // minimal size to do kv sep
options.dcpmm_compress_value = false;
usage:
options.use_mmap_read = true;
options.cache_index_and_filter_blocks_for_mmap_read = true;
rocksdb::BlockBasedTableOptions bbto;
bbto.block_size = 256 (512,1024, ... etc);
options.table_factory.reset(rocksdb::NewBlockBasedTableFactory(bbto));
RocksDB is developed and maintained by Facebook Database Engineering Team. It is built on earlier work on LevelDB by Sanjay Ghemawat ([email protected]) and Jeff Dean ([email protected])
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 especially 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/ and https://rocksdb.slack.com/
RocksDB is dual-licensed under both the GPLv2 (found in the COPYING file in the root directory) and Apache 2.0 License (found in the LICENSE.Apache file in the root directory). You may select, at your option, one of the above-listed licenses.