A library that provides an embeddable, persistent key-value store for fast storage.
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gitbw95 4da34b97ee Set Read rate limiter priority dynamically and pass it to FS (#9996)
Summary:
### Context:
Background compactions and flush generate large reads and writes, and can be long running, especially for universal compaction. In some cases, this can impact foreground reads and writes by users.

### Solution
User, Flush, and Compaction reads share some code path. For this task, we update the rate_limiter_priority in ReadOptions for code paths (e.g. FindTable (mainly in BlockBasedTable::Open()) and various iterators), and eventually update the rate_limiter_priority in IOOptions for FSRandomAccessFile.

**This PR is for the Read path.** The **Read:** dynamic priority for different state are listed as follows:

| State | Normal | Delayed | Stalled |
| ----- | ------ | ------- | ------- |
|  Flush (verification read in BuildTable()) | IO_USER | IO_USER | IO_USER |
|  Compaction | IO_LOW  | IO_USER | IO_USER |
|  User | User provided | User provided | User provided |

We will respect the read_options that the user provided and will not set it.
The only sst read for Flush is the verification read in BuildTable(). It claims to be "regard as user read".

**Details**
1. Set read_options.rate_limiter_priority dynamically:
- User: Do not update the read_options. Use the read_options that the user provided.
- Compaction: Update read_options in CompactionJob::ProcessKeyValueCompaction().
- Flush: Update read_options in BuildTable().

2. Pass the rate limiter priority to FSRandomAccessFile functions:
- After calling the FindTable(), read_options is passed through GetTableReader(table_cache.cc), BlockBasedTableFactory::NewTableReader(block_based_table_factory.cc), and BlockBasedTable::Open(). The Open() needs some updates for the ReadOptions variable and the updates are also needed for the called functions,  including PrefetchTail(), PrepareIOOptions(), ReadFooterFromFile(), ReadMetaIndexblock(), ReadPropertiesBlock(), PrefetchIndexAndFilterBlocks(), and ReadRangeDelBlock().
- In RandomAccessFileReader, the functions to be updated include Read(), MultiRead(), ReadAsync(), and Prefetch().
- Update the downstream functions of NewIndexIterator(), NewDataBlockIterator(), and BlockBasedTableIterator().

### Test Plans
Add unit tests.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/9996

Reviewed By: anand1976

Differential Revision: D36452483

Pulled By: gitbw95

fbshipit-source-id: 60978204a4f849bb9261cb78d9bc1cb56d6008cf
2022-05-18 19:41:44 -07:00
.circleci Remove slack CircleCI hook (#9982) 2022-05-11 13:17:21 -07:00
.github/workflows Use released clang-format instead of the one from dev branch (#9646) 2022-03-01 10:51:38 -08:00
buckifier Remove flaky servicelab metrics DBPut P95/P99 (#9844) 2022-04-15 13:56:22 -07:00
build_tools Remove ROCKSDB_SUPPORT_THREAD_LOCAL define because it's a part of C++11 (#10015) 2022-05-18 15:25:19 -07:00
cache Remove own ToString() (#9955) 2022-05-06 13:03:58 -07:00
cmake gcc-11 and cmake related cleanup (#9286) 2021-12-17 17:04:35 -08:00
coverage Fix commit_prereq and other targets (#9797) 2022-04-04 09:58:18 -07:00
db Set Read rate limiter priority dynamically and pass it to FS (#9996) 2022-05-18 19:41:44 -07:00
db_stress_tool Remove ROCKSDB_SUPPORT_THREAD_LOCAL define because it's a part of C++11 (#10015) 2022-05-18 15:25:19 -07:00
docs Bump nokogiri from 1.13.3 to 1.13.4 in /docs (#9831) 2022-04-12 09:07:14 -07:00
env Use STATIC_AVOID_DESTRUCTION for static objects with non-trivial destructors (#9958) 2022-05-17 09:39:22 -07:00
examples Remove BlockBasedTableOptions.hash_index_allow_collision (#9454) 2022-03-01 13:58:02 -08:00
file Set Read rate limiter priority dynamically and pass it to FS (#9996) 2022-05-18 19:41:44 -07:00
fuzz Fix compilation errors and add fuzzers to CircleCI (#9420) 2022-02-01 10:32:15 -08:00
include/rocksdb Remove ROCKSDB_SUPPORT_THREAD_LOCAL define because it's a part of C++11 (#10015) 2022-05-18 15:25:19 -07:00
java Fix conversion issues in MutableOptions (#9194) 2022-05-09 12:34:26 -07:00
logging Use system-wide thread ID in info log lines (#9164) 2021-11-12 19:46:06 -08:00
memory Remove ROCKSDB_SUPPORT_THREAD_LOCAL define because it's a part of C++11 (#10015) 2022-05-18 15:25:19 -07:00
memtable Rewrite memory-charging feature's option API (#9926) 2022-05-17 15:01:51 -07:00
microbench Add microbenchmarks for DB::GetMergeOperands() (#9971) 2022-05-09 15:17:19 -07:00
monitoring Remove ROCKSDB_SUPPORT_THREAD_LOCAL define because it's a part of C++11 (#10015) 2022-05-18 15:25:19 -07:00
options Rewrite memory-charging feature's option API (#9926) 2022-05-17 15:01:51 -07:00
plugin Add initial CMake support to plugin (#9214) 2021-11-30 17:16:53 -08:00
port Remove ROCKSDB_SUPPORT_THREAD_LOCAL define because it's a part of C++11 (#10015) 2022-05-18 15:25:19 -07:00
table Set Read rate limiter priority dynamically and pass it to FS (#9996) 2022-05-18 19:41:44 -07:00
test_util Added GetFactoryCount/Names/Types to ObjectRegistry (#9358) 2022-05-16 09:44:43 -07:00
third-party Meta-internal folly integration with F14FastMap (#9546) 2022-04-13 07:34:01 -07:00
tools Rewrite memory-charging feature's option API (#9926) 2022-05-17 15:01:51 -07:00
trace_replay Use std::numeric_limits<> (#9954) 2022-05-05 13:08:21 -07:00
util Remove ROCKSDB_SUPPORT_THREAD_LOCAL define because it's a part of C++11 (#10015) 2022-05-18 15:25:19 -07:00
utilities fix: build on risc-v (#9215) 2022-05-17 17:33:01 -07:00
.clang-format A script that automatically reformat affected lines 2014-01-14 12:21:24 -08:00
.gitignore Meta-internal folly integration with F14FastMap (#9546) 2022-04-13 07:34:01 -07:00
.lgtm.yml Create lgtm.yml for LGTM.com C/C++ analysis (#4058) 2018-06-26 12:43:04 -07:00
.travis.yml Fix remaining uses of "backupable" (#9792) 2022-04-05 09:52:33 -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 Remove ROCKSDB_SUPPORT_THREAD_LOCAL define because it's a part of C++11 (#10015) 2022-05-18 15:25:19 -07:00
CODE_OF_CONDUCT.md Adopt Contributor Covenant 2019-08-29 23:21:01 -07:00
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crash_test.mk Clean up variables for temporary directory (#9961) 2022-05-06 16:38:06 -07:00
DEFAULT_OPTIONS_HISTORY.md Add Options::DisableExtraChecks, clarify force_consistency_checks (#9363) 2022-01-18 17:31:03 -08:00
DUMP_FORMAT.md First version of rocksdb_dump and rocksdb_undump. 2015-06-19 16:24:36 -07:00
HISTORY.md Set Read rate limiter priority dynamically and pass it to FS (#9996) 2022-05-18 19:41:44 -07:00
INSTALL.md Update supported VS versions in INSTALL.md (#9823) 2022-04-13 13:03:40 -07:00
issue_template.md Add Google Group to Issue Template 2020-01-28 14:40:37 -08:00
LANGUAGE-BINDINGS.md Update branch name to "main" in README/LANGUAGE_BINDINGS (#8727) 2021-09-01 15:26:34 -07:00
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ROCKSDB_LITE.md Fix remaining uses of "backupable" (#9792) 2022-04-05 09:52:33 -07:00
rocksdb.pc.in Generate pkg-config file via CMake (#9945) 2022-05-05 09:03:31 -07:00
src.mk Fork and simplify LRUCache for developing enhancements (#9917) 2022-05-03 12:32:02 -07:00
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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/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.