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RDB v8: ability to save uint64_t lengths.

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antirez
2016-06-01 11:35:47 +02:00
parent b64fcbc74c
commit 4aae4f7d35
3 changed files with 34 additions and 44 deletions
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27
src/server.h
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@ -195,33 +195,6 @@ typedef long long mstime_t; /* millisecond time type. */
#define CMD_MODULE_GETKEYS (1<<14) /* Use the modules getkeys interface. */
#define CMD_MODULE_NO_CLUSTER (1<<15) /* Deny on Redis Cluster. */
/* Defines related to the dump file format. To store 32 bits lengths for short
* keys requires a lot of space, so we check the most significant 2 bits of
* the first byte to interpreter the length:
*
* 00|000000 => if the two MSB are 00 the len is the 6 bits of this byte
* 01|000000 00000000 => 01, the len is 14 byes, 6 bits + 8 bits of next byte
* 10|000000 [32 bit integer] => if it's 10, a full 32 bit len will follow
* 11|000000 this means: specially encoded object will follow. The six bits
* number specify the kind of object that follows.
* See the RDB_ENC_* defines.
*
* Lengths up to 63 are stored using a single byte, most DB keys, and may
* values, will fit inside. */
#define RDB_6BITLEN 0
#define RDB_14BITLEN 1
#define RDB_32BITLEN 2
#define RDB_ENCVAL 3
#define RDB_LENERR UINT_MAX
/* When a length of a string object stored on disk has the first two bits
* set, the remaining two bits specify a special encoding for the object
* accordingly to the following defines: */
#define RDB_ENC_INT8 0 /* 8 bit signed integer */
#define RDB_ENC_INT16 1 /* 16 bit signed integer */
#define RDB_ENC_INT32 2 /* 32 bit signed integer */
#define RDB_ENC_LZF 3 /* string compressed with FASTLZ */
/* AOF states */
#define AOF_OFF 0 /* AOF is off */
#define AOF_ON 1 /* AOF is on */