A library that provides an embeddable, persistent key-value store for fast storage.
fb84c49a36
Summary: Pad each Ticker structure to be 64 bytes and make them align on 64 bytes boundary to avoid cache line false sharing issue. Please refer to task 3615553 for more details Test Plan: db_bench LevelDB: version 2.0s Date: Wed Jan 29 12:23:17 2014 CPU: 32 * Intel(R) Xeon(R) CPU E5-2660 0 @ 2.20GHz CPUCache: 20480 KB rocksdb.build.overwrite.qps 49638 rocksdb.build.overwrite.p50_micros 58.73 rocksdb.build.overwrite.p75_micros 210.56 rocksdb.build.overwrite.p99_micros 733.28 rocksdb.build.fillseq.qps 366729 rocksdb.build.fillseq.p50_micros 1.00 rocksdb.build.fillseq.p75_micros 1.00 rocksdb.build.fillseq.p99_micros 2.65 rocksdb.build.readrandom.qps 1152995 rocksdb.build.readrandom.p50_micros 11.27 rocksdb.build.readrandom.p75_micros 15.69 rocksdb.build.readrandom.p99_micros 33.59 rocksdb.build.readrandom_smallblockcache.qps 956047 rocksdb.build.readrandom_smallblockcache.p50_micros 15.23 rocksdb.build.readrandom_smallblockcache.p75_micros 17.31 rocksdb.build.readrandom_smallblockcache.p99_micros 31.49 rocksdb.build.readrandom_memtable_sst.qps 1105183 rocksdb.build.readrandom_memtable_sst.p50_micros 12.04 rocksdb.build.readrandom_memtable_sst.p75_micros 15.78 rocksdb.build.readrandom_memtable_sst.p99_micros 32.49 rocksdb.build.readrandom_fillunique_random.qps 487856 rocksdb.build.readrandom_fillunique_random.p50_micros 29.65 rocksdb.build.readrandom_fillunique_random.p75_micros 40.93 rocksdb.build.readrandom_fillunique_random.p99_micros 78.68 rocksdb.build.memtablefillrandom.qps 91304 rocksdb.build.memtablefillrandom.p50_micros 171.05 rocksdb.build.memtablefillrandom.p75_micros 196.12 rocksdb.build.memtablefillrandom.p99_micros 291.73 rocksdb.build.memtablereadrandom.qps 1340411 rocksdb.build.memtablereadrandom.p50_micros 9.48 rocksdb.build.memtablereadrandom.p75_micros 13.95 rocksdb.build.memtablereadrandom.p99_micros 30.36 rocksdb.build.readwhilewriting.qps 491004 rocksdb.build.readwhilewriting.p50_micros 29.58 rocksdb.build.readwhilewriting.p75_micros 40.34 rocksdb.build.readwhilewriting.p99_micros 76.78 Reviewers: igor, haobo Reviewed By: igor CC: leveldb Differential Revision: https://reviews.facebook.net/D15573 |
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build_tools | ||
coverage | ||
db | ||
doc | ||
hdfs | ||
helpers/memenv | ||
include | ||
linters | ||
port | ||
table | ||
tools | ||
util | ||
utilities | ||
.arcconfig | ||
.clang-format | ||
.gitignore | ||
CONTRIBUTING.md | ||
HISTORY.md | ||
INSTALL.md | ||
LICENSE | ||
Makefile | ||
PATENTS | ||
README | ||
README.fb |
rocksdb: A persistent key-value store for flash storage Authors: * The Facebook Database Engineering Team * Build 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 an 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 specially suitable for storing multiple terabytes of data in a single database. The core of this code has been derived from open-source leveldb. The code under this directory implements a system for maintaining a persistent key/value store. See doc/index.html and github wiki (https://github.com/facebook/rocksdb/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. Guide to header files: include/rocksdb/db.h Main interface to the DB: Start here include/rocksdb/options.h Control over the behavior of an entire database, and also control over the behavior of individual reads and writes. include/rocksdb/comparator.h Abstraction for user-specified comparison function. If you want just bytewise comparison of keys, you can use the default comparator, but clients can write their own comparator implementations if they want custom ordering (e.g. to handle different character encodings, etc.) include/rocksdb/iterator.h Interface for iterating over data. You can get an iterator from a DB object. include/rocksdb/write_batch.h Interface for atomically applying multiple updates to a database. include/rocksdb/slice.h A simple module for maintaining a pointer and a length into some other byte array. include/rocksdb/status.h Status is returned from many of the public interfaces and is used to report success and various kinds of errors. include/rocksdb/env.h Abstraction of the OS environment. A posix implementation of this interface is in util/env_posix.cc include/rocksdb/table_builder.h Lower-level modules that most clients probably won't use directly include/rocksdb/cache.h An API for the block cache. include/rocksdb/compaction_filter.h An API for a application filter invoked on every compaction. include/rocksdb/filter_policy.h An API for configuring a bloom filter. include/rocksdb/memtablerep.h An API for implementing a memtable. include/rocksdb/statistics.h An API to retrieve various database statistics. include/rocksdb/transaction_log.h An API to retrieve transaction logs from a database. Design discussions are conducted in https://www.facebook.com/groups/rocksdb.dev/