A library that provides an embeddable, persistent key-value store for fast storage.
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Andrew Kryczka c5abf78bca avoid IterKey::UpdateInternalKey() in BlockIter (#6843)
Summary:
`IterKey::UpdateInternalKey()` is an error-prone API as it's
incompatible with `IterKey::TrimAppend()`, which is used for
decoding delta-encoded internal keys. This PR stops using it in
`BlockIter`. Instead, it assigns global seqno in a separate `IterKey`'s
buffer when needed. The logic for safely getting a Slice with global
seqno properly assigned is encapsulated in `GlobalSeqnoAppliedKey`.
`BinarySeek()` is also migrated to use this API (previously it ignored
global seqno entirely).
Pull Request resolved: https://github.com/facebook/rocksdb/pull/6843

Test Plan:
benchmark setup -- single file DBs, in-memory, no compression. "normal_db"
created by regular flush; "ingestion_db" created by ingesting a file. Both
DBs have same contents.

```
$ TEST_TMPDIR=/dev/shm/normal_db/ ./db_bench -benchmarks=fillrandom,compact -write_buffer_size=10485760000 -disable_auto_compactions=true -compression_type=none -num=1000000
$ ./ldb write_extern_sst ./tmp.sst --db=/dev/shm/ingestion_db/dbbench/ --compression_type=no --hex --create_if_missing < <(./sst_dump --command=scan --output_hex --file=/dev/shm/normal_db/dbbench/000007.sst | awk 'began {print "0x" substr($1, 2, length($1) - 2), "==>", "0x" $5} ; /^Sst file format: block-based/ {began=1}')
$ ./ldb ingest_extern_sst ./tmp.sst --db=/dev/shm/ingestion_db/dbbench/
```

benchmark run command:
```
TEST_TMPDIR=/dev/shm/$DB/ ./db_bench -benchmarks=seekrandom -seek_nexts=10 -use_existing_db=true -cache_index_and_filter_blocks=false -num=1000000 -cache_size=1048576000 -threads=1 -reads=40000000
```

results:

| DB | code | throughput |
|---|---|---|
| normal_db | master |  267.9 |
| normal_db   |    PR6843 | 254.2 (-5.1%) |
| ingestion_db |   master |  259.6 |
| ingestion_db |   PR6843 | 250.5 (-3.5%) |

Reviewed By: pdillinger

Differential Revision: D21562604

Pulled By: ajkr

fbshipit-source-id: 937596f836930515da8084d11755e1f247dcb264
2020-05-28 10:51:30 -07:00
.circleci pin image version in circle CI builds (#6876) 2020-05-23 21:23:27 -07:00
.github/workflows Clean up some code related to file checksums (#6861) 2020-05-21 08:12:51 -07:00
buckifier Use in-repo gtest in buck build (#6858) 2020-05-20 11:37:45 -07:00
build_tools Clean up some code related to file checksums (#6861) 2020-05-21 08:12:51 -07:00
cache Add Struct Type to OptionsTypeInfo (#6425) 2020-05-21 10:58:39 -07:00
cmake Add find_dependency() in cmake config file. (#6791) 2020-05-12 21:18:29 -07:00
coverage Update a few scripts to be python3 compatible (#6525) 2020-03-24 21:00:27 -07:00
db avoid IterKey::UpdateInternalKey() in BlockIter (#6843) 2020-05-28 10:51:30 -07:00
db_stress_tool fix transaction rollback in db_stress TestMultiGet (#6873) 2020-05-24 15:27:24 -07:00
docs Log warning for high bits/key in legacy Bloom filter (#6312) 2020-01-17 19:37:35 -08:00
env Status check enforcement for io_posix_test and options_settable_test (#6857) 2020-05-19 19:22:28 -07:00
examples Add missing my_pid to fprintf in multi_process_example (#6731) 2020-05-08 20:49:33 -07:00
file Misc things for ASSERT_STATUS_CHECKED, also gcc 4.8.5 (#6871) 2020-05-23 06:53:37 -07:00
hdfs prototype status check enforcement (#6798) 2020-05-08 12:40:43 -07:00
include/rocksdb Allow MultiGet users to limit cumulative value size (#6826) 2020-05-27 13:07:14 -07:00
java Add newer WBWI::NewIteratorWithBase functions to RocksJava (#6872) 2020-05-27 11:59:12 -07:00
logging Fix info log source file display length (#5824) 2020-04-08 20:18:08 -07:00
memory C++20 compatibility (#6697) 2020-04-20 13:24:25 -07:00
memtable C++20 compatibility (#6697) 2020-04-20 13:24:25 -07:00
monitoring Fix FilterBench when RTTI=0 (#6732) 2020-04-29 13:09:23 -07:00
options Allow MultiGet users to limit cumulative value size (#6826) 2020-05-27 13:07:14 -07:00
port C++20 compatibility (#6697) 2020-04-20 13:24:25 -07:00
table avoid IterKey::UpdateInternalKey() in BlockIter (#6843) 2020-05-28 10:51:30 -07:00
test_util Enable IO Uring in MultiGet in direct IO mode (#6815) 2020-05-14 23:26:26 -07:00
third-party Misc things for ASSERT_STATUS_CHECKED, also gcc 4.8.5 (#6871) 2020-05-23 06:53:37 -07:00
tools Make options length longer for sst_dump_test (#6846) 2020-05-19 09:22:12 -07:00
trace_replay Fix multiple CF replay failure in db_bench replay (#6787) 2020-05-01 00:03:38 -07:00
util Change autovector to have a reserved size in LITE mode (#6868) 2020-05-21 14:48:10 -07:00
utilities Fix warning -Wextra-semi. NFC. (#6869) 2020-05-22 11:20:13 -07:00
.clang-format A script that automatically reformat affected lines 2014-01-14 12:21:24 -08:00
.gitignore Separate timestamp related test from db_basic_test (#6516) 2020-03-13 11:37:15 -07:00
.lgtm.yml Create lgtm.yml for LGTM.com C/C++ analysis (#4058) 2018-06-26 12:43:04 -07:00
.travis.yml Misc things for ASSERT_STATUS_CHECKED, also gcc 4.8.5 (#6871) 2020-05-23 06:53:37 -07:00
.watchmanconfig Added .watchmanconfig file to rocksdb repo (#5593) 2019-07-19 15:00:33 -07:00
appveyor.yml C++20 compatibility (#6697) 2020-04-20 13:24:25 -07:00
AUTHORS Update RocksDB Authors File 2017-10-18 14:42:10 -07:00
CMakeLists.txt cmake: link env_librados_test against rados (#6855) 2020-05-25 22:53:00 -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
defs.bzl Make testpilot recognize that these tests have coverage instrumentation 2020-03-20 11:23:23 -07:00
DUMP_FORMAT.md First version of rocksdb_dump and rocksdb_undump. 2015-06-19 16:24:36 -07:00
HISTORY.md avoid IterKey::UpdateInternalKey() in BlockIter (#6843) 2020-05-28 10:51:30 -07:00
INSTALL.md Update the version of the dependencies used by the RocksJava static build (#4761) 2018-12-18 20:25:43 -08:00
issue_template.md Add Google Group to Issue Template 2020-01-28 14:40:37 -08:00
LANGUAGE-BINDINGS.md LANGUAGE-BINDINGS.md: mention python-rocksdb 2019-03-20 11:10:48 -07:00
LICENSE.Apache Change RocksDB License 2017-07-15 16:11:23 -07:00
LICENSE.leveldb Add back the LevelDB license file 2017-07-16 18:42:18 -07:00
Makefile Misc things for ASSERT_STATUS_CHECKED, also gcc 4.8.5 (#6871) 2020-05-23 06:53:37 -07:00
README.md Add Slack forum to README (#6773) 2020-04-30 11:00:28 -07:00
ROCKSDB_LITE.md Fix some typos in comments and docs. 2018-03-08 10:27:25 -08:00
src.mk Use in-repo gtest in buck build (#6858) 2020-05-20 11:37:45 -07:00
TARGETS Use in-repo gtest in buck build (#6858) 2020-05-20 11:37:45 -07:00
thirdparty.inc Fix build jemalloc api (#5470) 2019-06-24 17:40:32 -07:00
USERS.md Add YugabyteDB to USERS (#6786) 2020-05-06 10:28:29 -07:00
Vagrantfile Adding CentOS 7 Vagrantfile & build script 2018-02-26 15:27:17 -08:00
WINDOWS_PORT.md #5145 , rename port/dirent.h to port/port_dirent.h to avoid compile err when use port dir as header dir output (#5152) 2019-04-04 11:38:19 -07:00

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

Linux/Mac Build Status Windows Build status PPC64le Build Status

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.