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redis

简明手册

查询

Command Description
scan 0 match *pattern* count number 迭代数据库中的数据库键，产用于模糊搜索某 key ，非全量搜索
keys *pattern* 查询当前库指定 key
dbsize 当前数据库的 key 的数量。

info

memory 内存信息

Command Description
used_memory 内存总量，以字节（byte）为单位
used_memory_human 内存总量，以人类可读的格式展示
used_memory_rss 已分配的内存总量（常驻内存大小，单位为 byte ）。这个值和 top、ps 等命令的输出一致。
used_memory_rss_human 与 used_memory_rss 相同，以人类可读的格式展示
used_memory_peak 内存消耗峰值（以字节为单位）
used_memory_peak_human used_memory_rss/used_memory 的比例。一般情况下，used_memory_rss 略高于 used_memory，当内存碎片较多时，则 mem_fragmentation_ratio 会较大，可以反映内存碎片是否很多

Strings

Command Description
APPEND keyvalue Append
BITCOUNT key [ start stop ] Count #of set bits
BITOP AND dest[src]+ Bitwise AND
BITOP OR dest[src]+ Bitwise OR
BITOP XOR dest[src]+ Bitwise XOR
BITOP NOT destsrc Bitwise NOT
BITPOS keybit[startstop] Find first set bit
DECR key Decrement integer
DECRBY keyby Subtract from integer
GET key Get by key
GETBIT keyoffset Get bit by index
GETRANGE keystartend Get substring
GETSET keyvalue Set,returning old value
INCR key Increment integer
INCRBY keyby Add to integer
INCRBYFLOAT keyby Add to float
MGET [key]+ Get multiple
MSET [keyvalue]+ Set multiple
MSETNX [keyvalue]+ Set multiple if doesn’texist
PSETEX keymsvalue Set with expiry(ms)
SET keyvalue Set
SETBIT keyoffsetvalue Set bit by index
SETEX keysecsvalue Set with expiry(s)
SETNX keyvalue Set if doesn’t exist
SETRANGE keyoffsetvalue Set substring
STRLEN key Get length

Strings can be used as numbers,arrays,bit sets and binary data

Databases

Command Description
DEL [ key ]+ Delete item (s)
DUMP key Serialise item
EXISTS [ key ]+ Check for key
EXPIRE keys Set timeout on item
EXPIREAT keyts Set timeout by timestamp
KEYS pattern Get keys matching pattern
MIGRATE Transfer item between instances
MOVE keydb Transfer item between databases
OBJECT Inspect item
PERSIST key Remove timeout
PEXPIRE keyms Set timeout(ms)
PEXPIREAT keyts Set timeout(timestamp)
PTTL key Get item TTL(ms)
RANDOMKEY Get random key
RENAME key new Change item’skey
RENAMENX keynew Change key if new key doesn’t exist
RESTORE key Deserialise
SCAN keycursor[MATCH pattern][countcount] Iterate keys
SORT Get or store sorted copy
TTL key Get item TTL (s)
TYPE key Get type of item
  • Times are specified in seconds(s) or milliseconds(ms)*
  • Timestamps(s) are specified as seconds since January1,1970*

Hashes

Hashes
HDEL key [ field ]+ Delete field(s)
HEXISTS key field Check for field
HGET key field Get item
HGETALL key Return all fields/values
HINCRBY key field by Add to integer value
HINCRBYFLOAT key field by Add to float value
HKEYS key Return all fields
HLEN key Get number of fields
HMGET key[field] + Get multiple items
HMSET key[field value] + Set multiple items
HSCAN key cursor[MATCH pattern][countcount] Iterate fields
HSET key field value Set field
HSETNX key field value Set field if doesn’t exist
HSTRLEN key field Get string length of field
HVALS key Return all values

Sets

Sets
SADD key [ member ]+ 向集合添加一个或多个成员
SCARD key 获取集合的成员数
SDIFF [key]+ 返回第一个集合与其他集合之间的差异
SDIFFSTORE dest [key]+ Store difference
SINTER [key]+ Intersection
SINTERSTORE dest [key]+ Store intersection
SISMEMBER keymember Check for item
SMEMBERS key Get all
SMOVE srcdest member Move item to another set
SPOP key[count]? Pop random item
SRANDMEMBER key[count] Get random item
SREM key[member]+ Remove matching
SSCAN key cursor[MATCH pattern][countcount] Iterate items
SUNION[key]+ Union
SUNIONSTORE dest [key]+ Store union

SortedSets

SortedSets
ZADD key[options][score additem item] + Add item
ZCARD key Get number of items
ZCOUNT key min max Number of items with score range
ZINCRBY key incrmember Add to score
ZINTERSTORE Store intersection
ZLEXCOUNT key min max Lexicographical range count
ZRANGE key start stop [WITHSCORES] Get items within rank range
ZRANGEBYLEX key min max[ LIMIT offset count] Get items within lexicographical range
ZRANGEBYSCORE key min max [WITHSCORES][limit offset count] Get items within score range
ZRANK key member Get item rank
ZREM key [member]+ Remove item(s)
ZREMRANGEBYLEX key min max Remove items within lexicographical range
ZREMRANGEBYRANK key start stop Remove items within rank range
ZREMRANGEBYSCORE key min max Remove items within score range
ZREVRANGE ZRANGE inreverse order
ZREVRANGEBYLEX ZRANGEBYLEX inreverse order
ZREVRANGEBYSCORE ZRANGEBYSCORE inreverse order
ZREVRANK ZRANK inreverse order
ZSCAN key cursor [MATCH pattern][count count] Iterate items
ZSCORE keymember Get item score
ZUNIONSTORE dest numkeys [ key ]+ [ WEIGHTS [ weight ]+ ] [ AGGREGATE SUM[MIN][MAX] ] Store union

Lists

Lists
BLPOP [key]+timeout Blocking left pop
BLPOP [key]+timeout Blocking left pop
BRPOP [key]+timeout Blocking right pop
BRPOPLPUSH src dest timeout Blocking rotate
LINDEX key index Access by index
LINSERT key BEFORE[AFTER] pivot value Insert next to
LLEN key Get length
LPOP key Pop from start
LPUSH key[value]+ Push onto start
LPUSHX key value Push if list exists
LRANGE key start stop Access range
LREM key count value Remove occurrences
LSET key index value Set item by index
LTRIM list start stop Removes tart/end items
RPOP key Pop from end
RPOPLPUSH src dest Rotate
RPUSH key[value]+ Push onto end
RPUSHX key value Push onto end if list exists

Client/Server

Scripts
AUTH password Request authentication
ECHO message Return message
PING Test connection
QUIT Close connection
SELECT index Set current database by index

Scripts

Scripts
EVAL Run
EVALSHA Run cached
SCRIPT EXISTS Check by hash
SCRIPT FLUSH Clear cache
SCRIPT KILL Kill running script
SCRIPT LOAD Add to cache

see more

Redis.Cheat.Sheet