1,Redis 数据类型 Type
- src/server.h
- /* The actual Redis Object */
- #define OBJ_STRING 0 /* String object. */
- #define OBJ_LIST 1 /* List object. */
- #define OBJ_SET 2 /* Set object. */
- #define OBJ_ZSET 3 /* Sorted set object. */
- #define OBJ_HASH 4 /* Hash object. */
2, 底层数据编码 Ecoding
- /* Objects encoding. Some kind of objects like Strings and Hashes can be
- * internally represented in multiple ways. The 'encoding' field of the object
- * is set to one of this fields for this object. */
- #define OBJ_ENCODING_RAW 0 /* Raw representation */
- #define OBJ_ENCODING_INT 1 /* Encoded as integer */
- #define OBJ_ENCODING_HT 2 /* Encoded as hash table */
- #define OBJ_ENCODING_ZIPMAP 3 /* Encoded as zipmap */
- #define OBJ_ENCODING_LINKEDLIST 4 /* No longer used: old list encoding. */
- #define OBJ_ENCODING_ZIPLIST 5 /* Encoded as ziplist */
- #define OBJ_ENCODING_INTSET 6 /* Encoded as intset */
- #define OBJ_ENCODING_SKIPLIST 7 /* Encoded as skiplist */
- #define OBJ_ENCODING_EMBSTR 8 /* Embedded sds string encoding */
- #define OBJ_ENCODING_QUICKLIST 9 /* Encoded as linked list of ziplists */
- #define OBJ_ENCODING_STREAM 10 /* Encoded as a radix tree of listpacks */
3, 对应关系
下面是《Redis 设计与实现》中对应关系, 最新的代码有增加新的编码格式, 后面再修改 TODO.
来源: http://www.bubuko.com/infodetail-3150070.html