70cb330a4a
Summary: Execute `ls` once when counting the file size of the `DB_DIR` and remove unused file number counter variable `c` . The test information as follow : ```Shell # benchmark command NUM_KEYS=30000000 CACHE_SIZE=6442450944 DB_DIR=/mnt/rocksdb_test WAL_DIR=/mnt/rocksdb_test ../tools/benchmark.sh fillseq_disable_wal # before modification cat /tmp/benchmark_fillseq.wal_disabled.v400.log.stats.sizes 0.0 0.0 0.0 0.0 195250 1.1 1.1 0.0 0.0 195300 2.5 2.5 0.0 0.0 195310 3.8 3.7 0.0 0.0 195320 5.1 5.1 0.0 0.0 195330 max sizes (GB): 5.1 all, 5.1 sst, 0.0 log, 0.0 blob # after modification cat /tmp/benchmark_fillseq.wal_disabled.v400.log.stats.sizes 0.0 0.0 0.0 0.0 194839 1.2 1.2 0.0 0.0 194849 2.6 2.6 0.0 0.0 194859 4.0 4.0 0.0 0.0 194909 5.4 5.4 0.0 0.0 194919 max sizes (GB): 5.4 all, 5.4 sst, 0.0 log, 0.0 blob ``` Pull Request resolved: https://github.com/facebook/rocksdb/pull/12363 Reviewed By: hx235 Differential Revision: D54005427 Pulled By: ajkr fbshipit-source-id: fae149705eb3fcda48d7381c42836a150f35ddc4 |
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| .circleci | ||
| .github | ||
| buckifier | ||
| build_tools | ||
| cache | ||
| cmake | ||
| coverage | ||
| db | ||
| db_stress_tool | ||
| docs | ||
| env | ||
| examples | ||
| file | ||
| fuzz | ||
| include/rocksdb | ||
| java | ||
| logging | ||
| memory | ||
| memtable | ||
| microbench | ||
| monitoring | ||
| options | ||
| plugin | ||
| port | ||
| table | ||
| test_util | ||
| third-party | ||
| tools | ||
| trace_replay | ||
| unreleased_history | ||
| util | ||
| utilities | ||
| .clang-format | ||
| .gitignore | ||
| .lgtm.yml | ||
| .watchmanconfig | ||
| AUTHORS | ||
| CMakeLists.txt | ||
| CODE_OF_CONDUCT.md | ||
| CONTRIBUTING.md | ||
| COPYING | ||
| DEFAULT_OPTIONS_HISTORY.md | ||
| DUMP_FORMAT.md | ||
| HISTORY.md | ||
| INSTALL.md | ||
| LANGUAGE-BINDINGS.md | ||
| LICENSE.Apache | ||
| LICENSE.leveldb | ||
| Makefile | ||
| PLUGINS.md | ||
| README.md | ||
| TARGETS | ||
| USERS.md | ||
| Vagrantfile | ||
| WINDOWS_PORT.md | ||
| common.mk | ||
| crash_test.mk | ||
| issue_template.md | ||
| rocksdb.pc.in | ||
| src.mk | ||
| thirdparty.inc | ||
README.md
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 especially suitable for storing multiple terabytes of data in a single database.
Start with example usage here: https://github.com/facebook/rocksdb/tree/main/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.
Questions and discussions are welcome on the RocksDB Developers Public Facebook group and email list on Google Groups.
License
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.