1.redis键key
1.key
keys *：查看当前key列
exists key的名字，判断某个key是否存在
move key db
--->当前库就没有了，被移除了
expire key 秒钟：为给定的key设置过期时间（到期/终止时间）
ttl key 查看还有多少秒过期，-1表示永不过期，-2表示已过期
type key 查看你的key是什么类型
[cevent@hadoop213 ~]$ redis
-cli -p 6379 开启客户端
127
.0
.0
.1:6379>
set k1 value1
OK
127
.0
.0
.1:6379>
set k2 value2
OK
127
.0
.0
.1:6379>
set k3 value3
OK
127
.0
.0
.1:6379>
exists k1 判断k1是否存在，存在1不存在0
(integer
)
1
127
.0
.0
.1:6379>
exists k10
(integer
)
0
127
.0
.0
.1:6379>
move k3 2 将k3移动到2号库
(integer
)
1
127
.0
.0
.1:6379>
keys
*
1
) "k2"
2
)
"k1"
127
.0
.0
.1:6379>
select 2 进入2号库
OK
127
.0
.0
.1:6379
[2
]>
get k3 获取k3
"value3"
127
.0
.0
.1:6379
[2
]>
select 0 返回1号库
OK
127
.0
.0
.1:6379>
ttl k1 查看k1生命周期，
-1表示永不过期
(integer
)
-1
127
.0
.0
.1:6379>
expire k2 10
设置k2终止生命10秒
(integer
)
1
127
.0
.0
.1:6379>
get k2
"value2"
127
.0
.0
.1:6379>
ttl k2 查询k2状态
(integer
)
4
127
.0
.0
.1:6379>
ttl k2 已经失效
-2
(integer
)
-2
127
.0
.0
.1:6379>
keys
* 已过期不存在（被移除内存系统）
1
)
"k1"
127
.0
.0
.1:6379>
get k2
(nil
)
127
.0
.0
.1:6379>
set k1 cevent
覆盖k1值
set
OK
127
.0
.0
.1:6379>
get k1
"cevent"
127
.0
.0
.1:6379>
lpush ceventlist 1 2 3 4 5 创建list
(integer
)
5
127
.0
.0
.1:6379>
lrange ceventlist 0
-1 查询范围
1
)
"5"
2
)
"4"
3
)
"3"
4
)
"2"
5
)
"1"
127
.0
.0
.1:6379>
type ceventlist
查看
*list类型
list
127
.0
.0
.1:6379>
keys
*
1
)
"ceventlist"
2
)
"k1"
2.Redis字符串(String）
127
.0
.0
.1:6379>
del
ceventlist 删除集合
(integer
) 1
127
.0
.0
.1:6379> keys
*
1
) "k1"
127
.0
.0
.1:6379> get k1
"cevent"
127
.0
.0
.1:6379> append k1 619
为k1追加值
(integer
) 9
127
.0
.0
.1:6379> get k1
"cevent619"
127
.0
.0
.1:6379> strlen
k1 查看k1长度
(integer
) 9
127
.0
.0
.1:6379>
set k2 6 创建k2值
OK
127
.0
.0
.1:6379> get k2
"6"
127
.0
.0
.1:6379> incr k2 增加（自增1）k2
(integer
) 7
127
.0
.0
.1:6379> incr k2
(integer
) 8
127
.0
.0
.1:6379> incr k2
(integer
) 9
127
.0
.0
.1:6379> get k2 获取k2
"9"
127
.0
.0
.1:6379> decr k2 减（自减1）k2
(integer
) 8
127
.0
.0
.1:6379> get k2
"8"
127
.0
.0
.1:6379> incrby k2 5 指定k2增加的int值
(integer
) 13
127
.0
.0
.1:6379> decrby k2
2 指定k2减少的int值
(integer
) 11
127
.0
.0
.1:6379> decrby k2 2
(integer
) 9
127
.0
.0
.1:6379>
set k3 value3
OK
127
.0
.0
.1:6379> incr k3 计算只能与数字
(error
) ERR value is not an integer or
out of range
127
.0
.0
.1:6379> get k1 获取k1
"cevent619"
127
.0
.0
.1:6379> getrange k1
0
-1 获取k的范围（0开始
-1结束）
"cevent619"
127
.0
.0
.1:6379> getrange k1
0 2 获取k1的范围（0开始 index=2结束）
"cev"
127
.0
.0
.1:6379> setrange k1 0
eee 设置index范围值
(integer
) 9
127
.0
.0
.1:6379> get k1
"eeeent619"
127
.0
.0
.1:6379> setex k4 10 v4
创建k4并赋值10秒的生命周期
OK
127
.0
.0
.1:6379> ttl k4 查看ttl生命
(integer
) 6
127
.0
.0
.1:6379> get k4 可获取
"v4"
127
.0
.0
.1:6379> ttl k4 ttl=
-2为已过期
(integer
) -2
127
.0
.0
.1:6379> get k4 获值为空
(nil
)
127
.0
.0
.1:6379> setnx k1 val
如果不存在才会被创建执行setnx
(integer
) 0
127
.0
.0
.1:6379> get k1
"eeeent619"
127
.0
.0
.1:6379> setnx k11
val11 不存在被创建
(integer
) 1
127
.0
.0
.1:6379> mset k1 value1
k2 v2 k3 v3 同时创建多个库并赋值
OK
127
.0
.0
.1:6379> mget k1 k2
k3 同时获取多个库
1
) "value1"
2
) "v2"
3
) "v3"
127
.0
.0
.1:6379> keys
*
1
) "k11"
2
) "k2"
3
) "k1"
4
) "k3"
127
.0
.0
.1:6379> get k1 覆盖k1值
"value1"
127
.0
.0
.1:6379> msetnx k3 v3 k4
v4 如果有一个不存在，那么k3修改成功，不会创建k4
(integer
) 0
127
.0
.0
.1:6379> keys
*
1
) "k11"
2
) "k2"
3
) "k1"
4
) "k3"
127
.0
.0
.1:6379> get k3
"v3"
127
.0
.0
.1:6379> mset k4 v4 k5
v5 如果都不存在，则会被创建
OK
127
.0
.0
.1:6379> keys
*
1
) "k4"
2
) "k5"
3
) "k11"
4
) "k2"
5
) "k1"
6
) "k3"
3.Redis列表(List）
[cevent@hadoop213 redis-3.0.4]$ ll
总用量 152
-rw
-rw
-r-
-. 1 cevent cevent 31391 9月 8 2015 00
-RELEASENOTES
-rw
-rw
-r-
-. 1 cevent cevent 53 9月 8 2015 BUGS
-rw
-rw
-r-
-. 1 cevent cevent 1439 9月 8 2015 CONTRIBUTING
-rw
-rw
-r-
-. 1 cevent cevent 1487 9月 8 2015 COPYING
drwxrwxr
-x
. 6 cevent cevent 4096 7月 1 17:51 deps
-rw
-rw
-r-
-. 1 cevent cevent 83 7月 2 18:01 dump
.rdb
-rw
-rw
-r-
-. 1 cevent cevent 11 9月 8 2015 INSTALL
-rw
-rw
-r-
-. 1 cevent cevent 151 9月
8 2015 Makefile
-rw
-rw
-r-
-. 1 cevent cevent 4223 9月 8 2015 MANIFESTO
-rw
-rw
-r-
-. 1 cevent cevent 5201 9月 8 2015 README
-rw
-rw
-r-
-. 1 cevent cevent 41404 7月 1 21:20 redis
.conf
-rwxrwxr
-x
. 1 cevent cevent 271 9月 8 2015 runtest
-rwxrwxr
-x
. 1 cevent cevent 280 9月 8 2015 runtest
-cluster
-rwxrwxr
-x
. 1 cevent cevent 281 9月 8 2015 runtest
-sentinel
-rw
-rw
-r-
-. 1 cevent cevent 7109 9月 8 2015 sentinel
.conf
drwxrwxr
-x
. 2 cevent cevent 4096 7月 1 17:52 src
drwxrwxr
-x
. 10 cevent cevent 4096 9月 8 2015 tests
drwxrwxr
-x
. 5 cevent cevent 4096 9月 8 2015 utils
[cevent@hadoop213 redis-3.0.4]$ redis
-server redis
.conf 启动redis服务
[cevent@hadoop213 redis-3.0.4]$ redis
-cli -p 6379 启动客户端
127
.0
.0
.1:6379> keys
*
1
) "k1"
2
) "k3"
3
) "k5"
4
) "k11"
5
) "k4"
6
) "k2"
127
.0
.0
.1:6379> lpush list01 1 2 3 4 5
（l=leftà正序进 反序出 push（压栈，插入）输出一个list）
(integer
) 5
127
.0
.0
.1:6379> lrange list01 0
-1
1
) "5"
2
) "4"
3
) "3"
4
) "2"
5
) "1"
127
.0
.0
.1:6379> rpush list02 1 2 3 4 5
（r=rightà正序进 正序出 rpush）
(integer
) 5
127
.0
.0
.1:6379> lrange list02 0
-1
1
) "1"
2
) "2"
3
) "3"
4
) "4"
5
) "5"
127
.0
.0
.1:6379> lpop list01 （l先进先出，所以第一个pop（出栈，清出）
-取出数据的是5）
"5"
127
.0
.0
.1:6379> rpop list01 （r倒序先出）
"1"
127
.0
.0
.1:6379> lpop list02 （rpush倒序取出数据）
"1"
127
.0
.0
.1:6379> rpop list02
"5"
127
.0
.0
.1:6379> lrange list01 0
-1 （按照lpush进入的顺序输出）
1
) "4"
2
) "3"
3
) "2"
127
.0
.0
.1:6379> lindex list01
0 （l=left index索引值）
"4"
127
.0
.0
.1:6379> lindex list02 0
"2"
127
.0
.0
.1:6379> llen list01 （查询list01长度）
(integer
) 3
127
.0
.0
.1:6379> rpush list03 1 1 1 2
2 2 2 4 4 4 4 5 5 5 5 6 插入集合值
(integer
) 16
127
.0
.0
.1:6379> lrem list03 2 4 删除2个4（rem=remove）
(integer
) 2
127
.0
.0
.1:6379> lrange list03 0
-1 查询删除结果
1
)
"1"
2
)
"1"
3
)
"1"
4
)
"2"
5
)
"2"
6
)
"2"
7
)
"2"
8
)
"4"
9
)
"4"
10
) "5"
11
) "5"
12
) "5"
13
) "5"
14
) "6"
127
.0
.0
.1:6379> lpush list04 1 2 3 4 5
6 7 8 8 9 插入list
(integer
) 10
127
.0
.0
.1:6379> lrange list04 0
-1 查询list
1
)
"9"
2
)
"8"
3
)
"8"
4
)
"7"
5
)
"6"
6
)
"5"
7
)
"4"
8
)
"3"
9
)
"2"
10
) "1"
127
.0
.0
.1:6379> ltrim list04 0 5 （修剪list 0
-5（不包含5））
OK
127
.0
.0
.1:6379> lrange list04
(error
) ERR wrong number of arguments
for
'lrange' command
127
.0
.0
.1:6379> lrange list04 0
-1
1
) "9"
2
) "8"
3
) "8"
4
) "7"
5
) "6"
6
) "5"
127
.0
.0
.1:6379> lrange list02 0
-1
1
) "2"
2
) "3"
3
) "4"
127
.0
.0
.1:6379> rpoplpush list04 list02
（rpop将list04倒序0=5出栈
-清出，lpush到list02正序输出0位置）
"5"
127
.0
.0
.1:6379> lrange list04 0
-1 （5被清出）
1
) "9"
2
) "8"
3
) "8"
4
) "7"
5
) "6"
127
.0
.0
.1:6379> lrange list02 0
-1 （5进入正序0）
1
) "5"
2
) "2"
3
) "2"
4
) "3"
5
) "4"
127
.0
.0
.1:6379> lset list04 1 cevent
覆盖指定下标值
OK
127
.0
.0
.1:6379> lrange list04 0
-1 下标1变为cevent
1
) "9"
2
) "cevent"
3
) "8"
4
) "7"
5
) "6"
127
.0
.0
.1:6379> linsert list04 before cevent hadoop 根据值，进行前before后after插入
(integer
) 6
127
.0
.0
.1:6379> linsert list04 after cevent azkaban
(integer
) 7
127
.0
.0
.1:6379> lrange list04 0
-1
1
) "9"
2
) "hadoop"
3
) "cevent"
4
) "azkaban"
5
) "8"
6
) "7"
7
) "6"
4.Redis集合(Set) ：单值多value
4.1sadd/smembers/sismember
127
.0
.0
.1:6379> sadd set01 1 1 2 2 3 3
插入值不可重复
set（重复的值会被忽略）
(integer
) 3
127
.0
.0
.1:6379> smembers set01 查询
set集合，s members
1
) "1"
2
) "2"
3
) "3"
127
.0
.0
.1:6379> sismember set01 1 查看1是否是（s is member）集合成员
(integer
) 1
127
.0
.0
.1:6379> smembers set01
1
) "1"
2
) "2"
3
) "3"
127
.0
.0
.1:6379> sismember set01 ce
(integer
) 0（不是集合成员）
4.2scard，获取集合里面的元素个数
127
.0
.0
.1:6379> scard set01 获取集合内值的个数
(integer
) 3
4.3srem key value 删除集合中元素
127
.0
.0
.1:6379> srem set01 3 删除集合内指定值（s remove）
(integer
) 1
127
.0
.0
.1:6379> smembers set01
1
) "1"
2
) "2"
4.4srandmember key 某个整数(随机出几个数)
从set集合里面随机取出2个
如果超过最大数量就全部取出，
如果写的值是负数，比如-3 ，表示需要取出3个，但是可能会有重复值。
127
.0
.0
.1:6379> sadd set02 1 2 3 4 5 6 7 8
创建
set
(integer
) 8
127
.0
.0
.1:6379> srandmember set02 3 在
set集合中随机取出3个数字
1
) "4"
2
) "8"
3
) "2"
127
.0
.0
.1:6379> srandmember set02 3
1
) "1"
2
) "4"
3
) "5"
4.5spop key 随机出栈
127
.0
.0
.1:6379> spop set02 随机出栈集合pop
"3"
127
.0
.0
.1:6379> spop set02
"2"
127
.0
.0
.1:6379> smembers set02 查询集合
1
) "1"
2
) "4"
3
) "5"
4
) "6"
5
) "7"
6
) "8"
4.6smove key1 key2 在key1里某个值 作用是将key1里的某个值赋给key2
127
.0
.0
.1:6379> smove set03 set02 cevent 将set03中的cevent移入set02
(integer
) 1
127
.0
.0
.1:6379> smembers set03
1
) "echo
127.0.0.1:6379> smembers set02
1) "1
"
2) "4
"
3) "8
"
4) "7
"
5) "6
"
6) "cevent
"
7) "5
"
8) "2"
5.数学集合类
5.1差集：sdiff 在第一个set里面而不在后面任何一个set里面的项
127
.0
.0
.1:6379> sadd set04 1 2 3 4 5 6
(integer
) 6
127
.0
.0
.1:6379> sadd set05 1 4 ce vent
(integer
) 4
127
.0
.0
.1:6379> sdiff set04 set05 第一个
set为主键，在第一个里面的被排除，取第一个
set集合的剩余值，第二个集合的剩余值不会被提取
1
) "2"
2
) "3"
3
) "5"
4
) "6"
5.2交集：sinter
127
.0
.0
.1:6379> sinter set04 set05 取两个集合的交集
1
) "1"
2
) "4"
5.3并集：sunion
127
.0
.0
.1:6379> sunion set04 set05 取并集，并去重
1
) "1"
2
) "4"
3
) "vent"
4
) "ce"
5
) "6"
6
) "3"
7
) "5"
8
) "2"
6.Redis哈希(Hash)- KV模式不变，但V是一个键值对
6.1hset/hget/hmset/hmget/hgetall/hdel
127
.0
.0
.1:6379> hset user id 619 key：user（一个key） value：id 619（键值对）
(integer
) 1
127
.0
.0
.1:6379> hget user
id 查询时也需要传入 键值对的key
"619"
127
.0
.0
.1:6379> hset user name cevent
(integer
) 1
127
.0
.0
.1:6379> hget user name
"cevent"
127
.0
.0
.1:6379> hmset customer id 66 name cevn age 30 创建hash集合hmset
OK
127
.0
.0
.1:6379> hmget customer id name age
查看hm集合值hmget
1
) "66"
2
) "cevn"
3
) "30"
127
.0
.0
.1:6379> hgetall customer 全查hgetall
1
) "id"
2
) "66"
3
) "name"
4
) "cevn"
5
) "age"
6
) "30"
127
.0
.0
.1:6379> hdel user name 删除值hdel
(integer
) 1
127
.0
.0
.1:6379> hgetall user 获取user
1
) "id"
2
) "619"
6.2hlen
127
.0
.0
.1:6379> hlen user 获取user集合的长度
(integer
) 1
127
.0
.0
.1:6379> hlen customer
(integer
) 3
6.3hexists key 在key里面的某个值的key
127
.0
.0
.1:6379> hexists customer id 判断hashset集合是否存在value值 0不存在 1存在
(integer
) 1
127
.0
.0
.1:6379> hexists customer email
(integer
) 0
6.4hkeys/hvals
127
.0
.0
.1:6379> hkeys customer 查询集合的所有key
1
) "id"
2
) "name"
3
) "age"
127
.0
.0
.1:6379> hvals customer 查询集合的所有值hvals …
1
) "66"
2
) "cevn"
3
) "30"
6.5hincrby/hincrbyfloat
127
.0
.0
.1:6379> hincrby customer age 2
自增hash increment by 2=hincrby
(integer
) 32
127
.0
.0
.1:6379> hincrby customer age 4
(integer
) 36
127
.0
.0
.1:6379> hset customer score 92
.8
建立小数集合
(integer
) 1
127
.0
.0
.1:6379> hincrbyfloat customer score 0
.5 自增小数hash increment by float=hincrbyfloat
"93.3"
6.6hsetnx：不存在赋值，存在了无效
127
.0
.0
.1:6379> hsetnx customer age 26
建立hash
set集合，有key则无法添加
(integer
) 0
127
.0
.0
.1:6379> hsetnx customer email 1540001771@qq
.com 建立setnx ，无key直接添加
(integer
) 1
127
.0
.0
.1:6379> hgetall customer
1
)
"id"
2
)
"66"
3
)
"name"
4
)
"cevn"
5
)
"age"
6
)
"36"
7
)
"score"
8
)
"93.3"
9
)
"email"
10
) "1540001771@qq.com"
127
.0
.0
.1:6379> hvals customer
1
) "66"
2
) "cevn"
3
) "36"
4
) "93.3"
5
) "1540001771@qq.com"
7.Redis有序集合Zset(sorted set）
7.1zadd/zrange、withscores
127
.0
.0
.1:6379> zadd zset01 60 v1 70 v2 80 v3 90 v4 100 v5 创建有序集合 score key value 键值对
(integer
) 5
127
.0
.0
.1:6379> zrange zset01 0
-1 查看集value
1
) "v1"
2
) "v2"
3
) "v3"
4
) "v4"
5
) "v5"
127
.0
.0
.1:6379> zrange zset01 0
-1 withscores 查看集合score键
1
)
"v1"
2
)
"60"
3
)
"v2"
4
)
"70"
5
)
"v3"
6
)
"80"
7
)
"v4"
8
)
"90"
9
)
"v5"
10
) "100"
7.2zrangebyscore key 开始score 结束score( 不包含Limit 作用是返回限制：limit 开始下标步 多少步
127
.0
.0
.1:6379> zrangebyscore zset01 60 90
查看score的value，r range by score
set集合 startxxx endxxx（包含）
1
) "v1"
2
) "v2"
3
) "v3"
4
) "v4"
127
.0
.0
.1:6379> zrangebyscore zset01 60
(90 不包含90的score
1
) "v1"
2
) "v2"
3
) "v3"
127
.0
.0
.1:6379> zrangebyscore zset01
(60
(90 不包含score=60
/90
1
) "v2"
2
) "v3"
127
.0
.0
.1:6379> zrangebyscore zset01 60 90 limit 2 2 条件限制limit 限制下标 每页限制条数
1
) "v3"
2
) "v4"
7.3zrem key 某score下对应的value值，作用是删除元素
删除元素，格式是zrem zset的key 项的值，项的值可以是多个zrem key score某个对应值，可以是多个值
127
.0
.0
.1:6379> zrem zset01 v5 删除zset集合的vlaue值，将key
-score一并删除
(integer
) 1
127
.0
.0
.1:6379> zrange zset01 0
-1 withscores 查询
set集合列表
1
) "v1"
2
) "60"
3
) "v2"
4
) "70"
5
) "v3"
6
) "80"
7
) "v4"
8
) "90"
7.4zcard/zcount key score区间/zrank key values值，作用是获得下标值/zscore key 对应值,获得分数
zcard：获取集合中元素个数
zcount ：获取分数区间内元素个数，zcount key 开始分数区间 结束分数区间
zrank：获取value在zset中的下标位置
zscore：按照值获得对应的分数
127
.0
.0
.1:6379> zcard zset01 查询集合中的个数，以score为单元
(integer
) 4
127
.0
.0
.1:6379> zcount zset01 60 80 计算集合score在60
-80的个数
(integer
) 3
127
.0
.0
.1:6379> zrank zset01 v4 查看集合v4的下标位置（0 1 2 3）
(integer
) 3
127
.0
.0
.1:6379> zscore zset01 v4 查询v4的分数
"90"
7.5zrevrank key values值，作用是逆序获得下标值
127
.0
.0
.1:6379> zrevrank zset01 v4 反转倒序查看指定vlaue索引下标（z reverse rank）
(integer
) 0
127
.0
.0
.1:6379> zrange zset01 0
-1
(v4为最后一位，翻转为第一位0
)
1
) "v1"
2
) "v2"
3
) "v3"
4
) "v4"
7.6zrevrange
zrevrange
127
.0
.0
.1:6379> zrevrange zset01 0
-1 反转倒序查询
1
) "v4"
2
) "v3"
3
) "v2"
4
) "v1"
7.7zrevrangebyscore key 结束score 开始score
127
.0
.0
.1:6379> zrevrangebyscore zset01 90 60 反转获取值，根据score，反转的话，第一个下标为90
1
) "v4"
2
) "v3"
3
) "v2"
4
) "v1"
1.Units单位
（1）配置大小单位,开头定义了一些基本的度量单位，只支持bytes，不支持bit
（2）对大小写不敏感
进入vim编辑器
查询显示行：: set nu
到最后一行：shift g
到首行：gg
Redis.conf总计行
1
2
3
4
5
6
7
8
9
10
11
12
13
insensitive so 1GB 1Gb 1gB are all the same
. 非大小写敏感区分，GB、gB都相同
924
10
. Raising the value will use more CPU when
925
will make Redis more responsive when
926
same time
, and timeouts may be
927
928
929
however a value over 100 is usually not
930
the default of 10 and raise this up to
931
low latency is required
.
932 hz 10
933
934
if the following option is enabled
935
MB of
data generated
. This is useful
936
disk more incrementally and avoid
937
938 aof
-rewrite
-incremental
-fsync yes
2.INCLUDES包含和我们的Struts2配置文件类似，可以通过includes包含，redis.conf可以作为总闸，包含其他
15
INCLUDES
16
17
18
19
Include files can include
20
21
22
"CONFIG REWRITE"
23
24
25
runtim e
.
26
27
28
29
30
31
3.GENERAL通用
33
GENERAL
34
35
36
daemonize d
.
37
daemonize yes
开启守护进程
38
39
40
41
pidfile
/var/run
/redis
.pid 进程管道id文件，开启时如果没有指定文件，默认为此目录文件为file通道
42
43
44
45
port 6379
46
47
48
49
requests
-per
-second environments you need an high backlog in order 高并发环境
50
51
52
53
54
tcp
-backlog 511
求backlog的队列总和，队列连接池backlog
55
56
57
58
one or
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
timeout 0 当长时间没有使用redis服务，则会自动超时关闭
75
76
77
78
79
80
81
82
83
84
85
ACKs
.
86
87
88
89
90 tcp
-keepalive 0 当前tcp检测为不检测
91
92
93
94
95
mess like the debug level
)
96
production probably
)
97
important
/ critical messages are logged
)
98
loglevel notice
99
100
empty string can be used to force
101
log on the standard output
. Note that
if you use standard 日志redis标准输出
102
logs will be sent to
/dev
/null
103 logfile
""
104
105
logger
, just
set 'syslog-enabled' to yes
,
106
syslog parameters to suit your needs
.
107
108
109
110
redis 系统日志
-ID
111
112
be USER or between LOCAL0
-LOCAL7
. 输出日志设备LOCAL0
-7
113
114
115
default database is DB 0
, you can
select
116
basis
using SELECT <dbid> where
117
'databases'-1
118 databases
16
119
4.SNAPSHOTTING快照
120
SNAPSHOTTING 快照数据备份相关设置
121
122
DB on disk: redis中会将snapshotting中的DB保存在硬盘中
123
124
save
<seconds> <changes> 命令
125
126
Will save the DB
if both the given
number of seconds and the given 保存DB动作
127
number of
write operations against the DB occurred
.
128
129
In the example below the behaviour will be to save:
130
after 900 sec
(15
min
) if at least 1 key changed 如果在900s
/15分钟内，1个key被改变，就会进行dump
.rdb存储
131
after 300 sec
(5 min
) if at least 10 keys changed如果在300s
/5分钟内，10个key被改变，就会进行dump
.rdb存储
132
after 60 sec
if at least 10000 keys changed 如果在60s
/1分钟内
,keys值由1万次变更，进行dump
.rdb存储
133
134
Note: you can disable saving
completely by commenting out all
"save" lin es
.
可以禁用
135
136
It is also possible to remove all the previously configured save
137
points by adding a save directive with a single empty string argument
138
like in the following example:
139
140
save
"" 禁用设置
141
142 save 900 1 默认
143 save 300 10
144 save 60 10000
145
146
accepting writes
if RDB snapshots are enabled
147
latest background save failed
.
148
hard way
) that
data is not persisting
149
are that no one will notice and some
150
151
152
will
start working again Redis will
153
154
155
proper monitoring of the Redis server
156
disable this feature so that Redis will
157
there are problems with disk
,
158
159 stop
-writes
-on
-bgsave
-error
yes 出错后立即保存
160
161
databases? 是否启动压缩算法
162
it
's almost always a win.
163 # If you want to save some CPU in the
saving child set it to 'no
' but
164 # the dataset will likely be bigger
if you have compressible values or keys.
165 rdbcompression
yes
166
167 # Since version 5 of RDB a CRC64 checksum is placed at the end of the file. 检查64位算法校验
168 # This makes the format more
resistant to corruption but there is a performa nce
169 # hit to pay (around 10%) when saving
and loading RDB files, so you can disa
ble it
170 # for maximum performances.
171 #
172 # RDB files created with checksum
disabled have a checksum of zero that will
173 # tell the loading code to skip the
check.
174 rdbchecksum
yes
175
176 # The filename where to dump the DB
177 dbfilename
dump.rdb 查询rdb数据位置
178
179 # The working directory.
180 #
181 # The DB will be written inside this
directory, with the filename specified
182 # above using the 'dbfilename'
configuration directive
.
183
184
created inside this directory
.
185
186
here
, not a file name
.
187
dir ./ 默认
dir目录位置
5.SECURITY安全：访问密码的查看、设置和取消
[cevent@hadoop213 redis-3.0.4]$
redis
-server redis
.conf
[cevent@hadoop213 redis-3.0.4]$ redis
-cli
-p 6379
127
.0
.0
.1:6379> ping
PONG
127
.0
.0
.1:6379> config get requirepass
获取默认请求密码
1
) "requirepass"
2
) "" 空串
127
.0
.0
.1:6379> config get
dir 获取路径目录
1
) "dir"
2
) "/opt/module/redis-3.0.4"
127
.0
.0
.1:6379> config
set requirepass
"cevent" 设置redis密码
OK
127
.0
.0
.1:6379> ping 不输入密码不通
(error
) NOAUTH Authentication required
.
127
.0
.0
.1:6379> auth cevent 输入面
OK
127
.0
.0
.1:6379> ping
PONG
127
.0
.0
.1:6379> config
set requirepass
"" 修改回空串
OK
127
.0
.0
.1:6379> ping
PONG
378
SECURITY
379
380
other
设置密码访问任何进程之前，输入AUTH <PASSWORD>
381
you
do not trust
382
running redis
-server
.
383
384
backward compatibility and because most
385
run their own servers
).
386
387
an outside user can
try up to
388
good box
. This means that you should
389
otherwise it will be very easy to
break.
390
391
392
393
394
395
of dangerous commands in a shared
396
CONFIG command may be renamed into something
397
be available
for internal
-use tools
398
clients
.
399
400
401
402
b840fc02d524045429941cc15f59e41cb7be6c52
403
404
kill a command by renaming it into
405
406
407
408
409
of commands that are logged into the
410
may cause problems
.
411
6. LIMITS限制：redis缓存清除策略
412
LIMITS
413
414
clients at the same time
. By default
415
however
if the Redis server is not
416
limit to allow
for the specified limit
417
is
set to the current file limit
418
file descriptors
for internal uses
).
419
420
will close all the new connections sending
421
reached
'.
422 #
423 # maxclients
10000 默认最大用户端访问量1万
424
425 # Don't use more memory than the
specified amount of bytes
.
426
Redis will
try to remove keys
427
selected
(see maxmemory
-policy
).
428
429
according to the policy
, or
if the policy is
430
start to reply with errors to commands
431
SET, LPUSH
, and so on
, and will
continue
432
GET
.
433
434
using Redis as an LRU cache
, or to
set
435
(using the
'noeviction' policy
).
436
437
attached to an instance with maxmemory on
,
438
needed to feed the slaves are subtracted
439
resyncs will
440
in turn the output
441
of keys evicted triggering the deletion
442
the database is completely emptied
.
443
444
attached it is suggested that you
set a low
er
445
is some free RAM on the system
for slave
446
needed
if the policy is
'noeviction').
447
448
<bytes> 缓存过期策略
449
450
when maxmemory
451
among five behaviors: 如果达到最大缓存，从以下5中缓存策略中执行过期清除
452
453
-> remove the key with an expire
set using an LRU algorithm
454
-> remove any key according to the LRU algorithm
清除机制：LRU（left right use）先进后出，最近最少使用的清除
455
-> remove a random key with an expire
set
随机清除
456
-> remove a random key
, any key
457
-> remove the key with the nearest expire time
(minor TTL
) 有限时间内清除TTL（time to leave）
458
-> don't expire at all
, just
return an error on
write
operations 永不清除配置
459
460
policies
, Redis will
return an error on
write
461
keys
for eviction
.
462
463
are:
set setnx setex append
464
linsert lset rpoplpush sadd
465
sdiff sdiffstore zadd zincrby
466
hmset hincrby incrby decrby
467
468
469
470
471
noeviction 默认永不过期
/永不清除（一般真正实操不配noeviction永不过期）
472
473
not precise algorithms but approximated
474
memory
), so you can tune it
for speed or
475
check five keys and pick the one that was
476
the sample size
using the following
477
478
479
enough results
. 10 Approximates very closel
y
480
3 is very fast but not very accurate
.
481
482
5 默认选取5个缓存样本
483
7.常见配置redis.conf
