b20737709f
Summary: Hello and thanks for RocksDB, This PR adds support for ```-report_open_timing true``` to ```db_bench```. It can be useful when tuning RocksDB on filesystem/env with high latencies for file level operations (create/delete/rename...) seen during ```((Optimistic)Transaction)DB::Open```. Some examples: ``` > db_bench -benchmarks updaterandom -num 1 -db /dev/shm/db_bench > db_bench -benchmarks updaterandom -num 0 -db /dev/shm/db_bench -use_existing_db true -report_open_timing true -readonly true 2>&1 | grep OpenDb OpenDb: 3.90133 milliseconds > db_bench -benchmarks updaterandom -num 0 -db /dev/shm/db_bench -use_existing_db true -report_open_timing true -use_secondary_db true 2>&1 | grep OpenDb OpenDb: 3.33414 milliseconds > db_bench -benchmarks updaterandom -num 0 -db /dev/shm/db_bench -use_existing_db true -report_open_timing true 2>&1 | grep -A1 OpenDb OpenDb: 6.05423 milliseconds > db_bench -benchmarks updaterandom -num 1 > db_bench -benchmarks updaterandom -num 0 -use_existing_db true -report_open_timing true -readonly true 2>&1 | grep OpenDb OpenDb: 4.06859 milliseconds > db_bench -benchmarks updaterandom -num 0 -use_existing_db true -report_open_timing true -use_secondary_db true 2>&1 | grep OpenDb OpenDb: 2.85794 milliseconds > db_bench -benchmarks updaterandom -num 0 -use_existing_db true -report_open_timing true 2>&1 | grep OpenDb OpenDb: 6.46376 milliseconds > db_bench -benchmarks updaterandom -num 1 -db /clustered_fs/db_bench > db_bench -benchmarks updaterandom -num 0 -db /clustered_fs/db_bench -use_existing_db true -report_open_timing true -readonly true 2>&1 | grep OpenDb OpenDb: 3.79805 milliseconds > db_bench -benchmarks updaterandom -num 0 -db /clustered_fs/db_bench -use_existing_db true -report_open_timing true -use_secondary_db true 2>&1 | grep OpenDb OpenDb: 3.00174 milliseconds > db_bench -benchmarks updaterandom -num 0 -db /clustered_fs/db_bench -use_existing_db true -report_open_timing true 2>&1 | grep OpenDb OpenDb: 24.8732 milliseconds ``` Pull Request resolved: https://github.com/facebook/rocksdb/pull/8464 Reviewed By: hx235 Differential Revision: D29398096 Pulled By: zhichao-cao fbshipit-source-id: 8f05dc3284f084612a3f30234e39e1c37548f50c |
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| .circleci | ||
| .github/workflows | ||
| buckifier | ||
| build_tools | ||
| cache | ||
| cmake | ||
| coverage | ||
| db | ||
| db_stress_tool | ||
| docs | ||
| env | ||
| examples | ||
| file | ||
| fuzz | ||
| hdfs | ||
| include/rocksdb | ||
| java | ||
| logging | ||
| memory | ||
| memtable | ||
| monitoring | ||
| options | ||
| plugin | ||
| port | ||
| table | ||
| test_util | ||
| third-party | ||
| tools | ||
| trace_replay | ||
| util | ||
| utilities | ||
| .clang-format | ||
| .gitignore | ||
| .lgtm.yml | ||
| .travis.yml | ||
| .watchmanconfig | ||
| appveyor.yml | ||
| AUTHORS | ||
| CMakeLists.txt | ||
| CODE_OF_CONDUCT.md | ||
| CONTRIBUTING.md | ||
| COPYING | ||
| DEFAULT_OPTIONS_HISTORY.md | ||
| defs.bzl | ||
| DUMP_FORMAT.md | ||
| HISTORY.md | ||
| INSTALL.md | ||
| issue_template.md | ||
| LANGUAGE-BINDINGS.md | ||
| LICENSE.Apache | ||
| LICENSE.leveldb | ||
| Makefile | ||
| PLUGINS.md | ||
| README.md | ||
| ROCKSDB_LITE.md | ||
| src.mk | ||
| TARGETS | ||
| thirdparty.inc | ||
| USERS.md | ||
| Vagrantfile | ||
| WINDOWS_PORT.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/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/
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.