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sdong 60e5af83c1 Handle return code by io_uring_submit_and_wait() and io_uring_wait_cqe() (#8311)
Summary:
Right now return codes by io_uring_submit_and_wait() and io_uring_wait_cqe() are not handled. It is not the good practice. Although these two functions are not supposed to return non-0 values in normal exeuction, people suspect that they might return non-0 value when an interruption happens, and the code might cause hanging.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/8311

Test Plan: Make sure at least normal test cases still pass.

Reviewed By: anand1976

Differential Revision: D28500828

fbshipit-source-id: 8a76cea9cafbd041102e0b6a8eef9d0bfed7c211
2021-05-18 16:09:14 -07:00
.circleci Fix cmake failed to build db_bench (#8289) 2021-05-12 11:39:01 -07:00
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buckifier Make tests "parallel" and "passing ASC" by default (#8146) 2021-04-04 20:10:11 -07:00
build_tools Fix crash test with backup as read-only DB (#8161) 2021-04-06 23:31:51 -07:00
cache Initial support for secondary cache in LRUCache (#8271) 2021-05-13 22:58:40 -07:00
cmake Add `find_dependency()` in cmake config file. (#6791) 2020-05-12 21:18:29 -07:00
coverage Find the correct gcov (#6904) 2020-06-01 16:33:05 -07:00
db Expose CompressionOptions::parallel_threads through C API (#8302) 2021-05-17 22:53:04 -07:00
db_stress_tool db_stress: wait for compaction to finish after open with failure injection (#8270) 2021-05-05 16:41:45 -07:00
docs Bump rexml from 3.2.4 to 3.2.5 in /docs (#8251) 2021-05-07 16:00:06 -07:00
env Handle return code by io_uring_submit_and_wait() and io_uring_wait_cqe() (#8311) 2021-05-18 16:09:14 -07:00
examples make:Fix c header prototypes (#7994) 2021-03-09 20:44:23 -08:00
file Refactor kill point (#8241) 2021-05-05 15:50:29 -07:00
fuzz Remove Legacy and Custom FileWrapper classes from header files (#7851) 2021-01-28 22:10:32 -08:00
hdfs fix build with 'USE_HDFS' on windows (#6950) 2020-06-12 16:21:50 -07:00
include/rocksdb Expose CompressionOptions::parallel_threads through C API (#8302) 2021-05-17 22:53:04 -07:00
java Make ImmutableOptions struct that inherits from ImmutableCFOptions and ImmutableDBOptions (#8262) 2021-05-05 14:00:17 -07:00
logging Use SystemClock* instead of std::shared_ptr<SystemClock> in lower level routines (#8033) 2021-03-15 04:34:11 -07:00
memory Use thread-safe `strerror_r()` to get error message (#8087) 2021-03-24 23:07:27 -07:00
memtable Stall writes in WriteBufferManager when memory_usage exceeds buffer_size (#7898) 2021-04-21 13:54:02 -07:00
monitoring Disable IOStatsContext/PerfContext if no thread local (#8117) 2021-04-13 07:56:59 -07:00
options Refactor Option obj address from char* to void* (#8295) 2021-05-13 14:29:42 -07:00
plugin Makefile support to statically link external plugin code (#7918) 2021-02-10 08:35:34 -08:00
port Refactor kill point (#8241) 2021-05-05 15:50:29 -07:00
table Make it possible to apply only a subrange of table property collectors (#8298) 2021-05-17 18:28:39 -07:00
test_util Refactor kill point (#8241) 2021-05-05 15:50:29 -07:00
third-party Fix a compilation error in CircleCI vs2019 CXX20 (#8090) 2021-03-23 10:28:04 -07:00
tools Make it possible to apply only a subrange of table property collectors (#8298) 2021-05-17 18:28:39 -07:00
trace_replay Add request_id in IODebugContext. (#8045) 2021-04-01 13:14:51 -07:00
util Add De/Serialization for CompactionInput/Result (#8247) 2021-05-12 12:36:43 -07:00
utilities Fix MultiGet with PinnableSlices and Merge for WBWI (#8299) 2021-05-18 14:35:47 -07:00
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.gitignore gitignore cmake-build-* for CLion integration (#7933) 2021-02-19 13:43:15 -08:00
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.travis.yml Move arm build from travis to circleci (#8203) 2021-04-19 20:07:02 -07:00
.watchmanconfig Added .watchmanconfig file to rocksdb repo (#5593) 2019-07-19 15:00:33 -07:00
AUTHORS Update RocksDB Authors File 2017-10-18 14:42:10 -07:00
CMakeLists.txt Fix cmake failed to build db_bench (#8289) 2021-05-12 11:39:01 -07:00
CODE_OF_CONDUCT.md Adopt Contributor Covenant 2019-08-29 23:21:01 -07:00
CONTRIBUTING.md Add Code of Conduct 2017-12-05 18:42:35 -08:00
COPYING Add GPLv2 as an alternative license. 2017-04-27 18:06:12 -07:00
DEFAULT_OPTIONS_HISTORY.md options.delayed_write_rate use the rate of rate_limiter by default. 2017-05-24 09:58:24 -07:00
DUMP_FORMAT.md First version of rocksdb_dump and rocksdb_undump. 2015-06-19 16:24:36 -07:00
HISTORY.md Handle return code by io_uring_submit_and_wait() and io_uring_wait_cqe() (#8311) 2021-05-18 16:09:14 -07:00
INSTALL.md Update installation instructions (#8158) 2021-04-06 16:02:04 -07:00
LANGUAGE-BINDINGS.md Add RestoreDBFromLatestBackup to C API, add new C# package (#7092) 2020-07-08 11:56:41 -07:00
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Makefile Stall writes in WriteBufferManager when memory_usage exceeds buffer_size (#7898) 2021-04-21 13:54:02 -07:00
PLUGINS.md Add ZenFS to plugin list (#8218) 2021-04-22 11:12:40 -07:00
README.md Fix the CI badge for ppc64le Jenkins (#7561) 2020-10-16 09:00:56 -07:00
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src.mk Hint temperature of bottommost level files to FileSystem (#8222) 2021-05-03 13:34:04 -07:00
thirdparty.inc Fix build jemalloc api (#5470) 2019-06-24 17:40:32 -07:00

README.md

RocksDB: A Persistent Key-Value Store for Flash and RAM Storage

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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.