mirror of
https://github.com/facebook/rocksdb.git
synced 2024-11-30 04:41:49 +00:00
f7975ac733
Summary: Each assoc is identified by (id1, assocType). This is the rowkey. Each row has a read/write rowlock. There is statically allocated array of 2000 read/write locks. A rowkey is murmur-hashed to one of the read/write locks. assocPut and assocDelete acquires the rowlock in Write mode. The key-updates are done within the rowlock with a atomic nosync batch write to leveldb. Then the rowlock is released and a write-with-sync is done to sync leveldb transaction log. Test Plan: added unit test Reviewers: heyongqiang Reviewed By: heyongqiang Differential Revision: https://reviews.facebook.net/D5859
33 lines
854 B
C
33 lines
854 B
C
/*
|
|
Murmurhash from http://sites.google.com/site/murmurhash/
|
|
|
|
All code is released to the public domain. For business purposes, Murmurhash is
|
|
under the MIT license.
|
|
*/
|
|
#ifndef MURMURHASH_H
|
|
#define MURMURHASH_H
|
|
|
|
#include <stdint.h>
|
|
|
|
#if defined(__x86_64__)
|
|
#define MURMUR_HASH MurmurHash64A
|
|
uint64_t MurmurHash64A ( const void * key, int len, unsigned int seed );
|
|
#define MurmurHash MurmurHash64A
|
|
typedef uint64_t murmur_t;
|
|
|
|
#elif defined(__i386__)
|
|
#define MURMUR_HASH MurmurHash2
|
|
unsigned int MurmurHash2 ( const void * key, int len, unsigned int seed );
|
|
#define MurmurHash MurmurHash2
|
|
typedef unsigned int murmur_t;
|
|
|
|
#else
|
|
#define MURMUR_HASH MurmurHashNeutral2
|
|
unsigned int MurmurHashNeutral2 ( const void * key, int len, unsigned int seed );
|
|
#define MurmurHash MurmurHashNeutral2
|
|
typedef unsigned int murmur_t;
|
|
|
|
#endif
|
|
|
|
#endif /* MURMURHASH_H */
|