Redis 常用命令
官方文档:https://redis.io/commands
CONFIG
config 命令用于查看当前redis配置、以及不重启redis服务,动态更改redis配置等
注意:不是所有配置都可以动态修改
更改最大内存
127.0.0.1:6379> CONFIG SET maxmemory 8589934592
OK
127.0.0.1:6379> CONFIG GET maxmemory
1) "maxmemory"
2) "8589934592"
设置连接密码
127.0.0.1:6379> CONFIG SET requirepass 123456
OK
获取当前配置
#奇数行为键,偶数行为值
127.0.0.1:6379> CONFIG GET *
1) "dbfilename"
2) "dump.rdb"
3) "requirepass"
4) ""
5) "masterauth"
6) ""
7) "cluster-announce-ip"
8) ""
9) "unixsocket"
10) ""
11) "logfile"
12) "/var/log/redis/redis.log"
13) "pidfile"
14) "/var/run/redis_6379.pid"
15) "slave-announce-ip"
16) ""
17) "replica-announce-ip"
18) ""
19) "maxmemory"
20) "0"
......
INFO
显示当前节点redis运行状态信息
127.0.0.1:6379> INFO
# Server
redis_version:5.0.3
redis_git_sha1:00000000
redis_git_dirty:0
redis_build_id:8c0bf22bfba82c8f
redis_mode:standalone
os:Linux 4.18.0-147.el8.x86_64 x86_64
arch_bits:64
multiplexing_api:epoll
atomicvar_api:atomic-builtin
gcc_version:8.2.1
process_id:725
run_id:8af0d3fba2b7c5520e0981b125cc49c3ce4d2a2f
tcp_port:6379
uptime_in_seconds:18552
......
SELECT
切换数据库,等于MySQL的use DBNAME指令。
127.0.0.1:6379[15]> SELECT 0
OK
127.0.0.1:6379> SELECT 1
OK
127.0.0.1:6379[1]> SELECT 15
OK
127.0.0.1:6379[15]> SELECT 16
(error) ERR DB index is out of range
127.0.0.1:6379[15]>
KEYS
查看当前库下的所有key,此命令慎用!
1 27.0.0.1:6379[15]> SELECT 0
OK
127.0.0.1:6379> KEYS *
1) "9527"
2) "9526"
3) "paihangbang"
4) "list1"
127.0.0.1:6379> SELECT 1
OK
127.0.0.1:6379[1]> KEYS *
(empty list or set)
127.0.0.1:6379[1]>
BGSAVE
手动在后台执行RDB持久化操作
#交互式执行
127.0.0.1:6379[1]> BGSAVE
Background saving started
#非交互式执行
[root@centos8 ~]#ll /var/lib/redis/
total 4
-rw-r--r-- 1 redis redis 326 Feb 18 22:45 dump.rdb
[root@centos8 ~]#redis-cli -h 127.0.0.1 -a '123456' BGSAVE
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
Background saving started
[root@centos8 ~]#ll /var/lib/redis/
total 4
-rw-r--r-- 1 redis redis 92 Feb 18 22:54 dump.rdb
DBSIZE
返回当前库下的所有key 数量
127.0.0.1:6379> DBSIZE
(integer) 4
127.0.0.1:6379> SELECT 1
OK
127.0.0.1:6379[1]> DBSIZE
(integer) 0
FLUSHDB
强制清空当前库中的所有key
127.0.0.1:6379[1]> SELECT 0
OK
127.0.0.1:6379> DBSIZE
(integer) 4
127.0.0.1:6379> FLUSHDB
OK
127.0.0.1:6379> DBSIZE
(integer) 0
127.0.0.1:6379>
FLUSHALL
强制清空当前redis服务器所有数据库中的所有key,即删除所有数据
127.0.0.1:6379> FLUSHALL
OK
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