Redis数据类型官网说明文档:http://www.redis.io/topics/data-types-intro Redis keysRedis keys are binary safe, this means that you can use any binar ...
Redis数据类型
官网说明文档:http://www.redis.io/topics/data-types-intro
Redis keys
Redis keys are binary safe, this means that you can use any binary sequence as a key, from a string like "foo" to the content of a JPEG file. The empty string is also a valid key.
Redis key是二进制安全的,这意味着你可以使用任何二进制序列作为一个key,从一个字符串”foo”到JPEG文件的内容。空字符串也是合法的key。
规则
- Key不要太长,消耗内存,在数据集中查找key可能会需要更多的匹配成本。
- Key不要太短,可读性较差,
- 追寻一种模式"object-type:id" "comment:1234:reply.to" or "comment:1234:reply-to"
- Key允许的最大值为512M
Redis客户端 Redis-Cli
查看帮助
redis-cli --help
指定数据块编号
redis-cli -n 0
获取命令的帮助信息
官网帮助文档:http://www.redis.io/commands
help @string 获取数据类型string的相关操作命令
help @list 获取数据类型list的相关操作命令
help set
help <tab>键 有提示信息
String
这里简单介绍下String类型:
help @string
APPEND key value summary: Append a value to a key since: 2.0.0 BITCOUNT key [start] [end] summary: Count set bits in a string since: 2.6.0 BITOP operation destkey key [key ...] summary: Perform bitwise operations between strings since: 2.6.0 BITPOS key bit [start] [end] summary: Find first bit set or clear in a string since: 2.8.7 DECR key summary: Decrement the integer value of a key by one since: 1.0.0 DECRBY key decrement summary: Decrement the integer value of a key by the given number since: 1.0.0 GET key summary: Get the value of a key since: 1.0.0 GETBIT key offset summary: Returns the bit value at offset in the string value stored at key since: 2.2.0 GETRANGE key start end summary: Get a substring of the string stored at a key since: 2.4.0 GETSET key value summary: Set the string value of a key and return its old value since: 1.0.0 INCR key summary: Increment the integer value of a key by one since: 1.0.0 INCRBY key increment summary: Increment the integer value of a key by the given amount since: 1.0.0 INCRBYFLOAT key increment summary: Increment the float value of a key by the given amount since: 2.6.0 MGET key [key ...] summary: Get the values of all the given keys since: 1.0.0 MSET key value [key value ...] summary: Set multiple keys to multiple values since: 1.0.1 MSETNX key value [key value ...] summary: Set multiple keys to multiple values, only if none of the keys exist since: 1.0.1 PSETEX key milliseconds value summary: Set the value and expiration in milliseconds of a key since: 2.6.0 SET key value [EX seconds] [PX milliseconds] [NX|XX] summary: Set the string value of a key since: 1.0.0 SETBIT key offset value summary: Sets or clears the bit at offset in the string value stored at key since: 2.2.0 SETEX key seconds value summary: Set the value and expiration of a key since: 2.0.0 SETNX key value summary: Set the value of a key, only if the key does not exist since: 1.0.0 SETRANGE key offset value summary: Overwrite part of a string at key starting at the specified offset since: 2.2.0 STRLEN key summary: Get the length of the value stored in a key since: 2.2.0
原标题:Redis 数据类型
关键词:Redis
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