redis常用命令
Redis常用命令
Redis提供了丰富的命令对数据库和各种数据库类型进行操作，这些命令可以在Linux终端使用。
1、键值相关命令
2、服务器相关命令
键值相关命令：
keys
返回满足给定pattern的所有key
127.0.0.1:6379> keys pattern
127.0.0.1:6379> keys *
1) "set_four"
2) "list_one"
3) "firstname"
4) "user"
5) "lastname"
6) "zset"
7) "age"
8) "set_three"
9) "set_one"
10) "set_two"
11) "one"
12) "set_five"
13) "name"
127.0.0.1:6379> keys list_*
1) "list_one"
exists
确认一个key是否存在
127.0.0.1:6379> exists key [key ...]
127.0.0.1:6379> exists name
(integer) 1
127.0.0.1:6379> exists name firstname
(integer) 2
127.0.0.1:6379> exists name hi
(integer) 1
del
删除一个key
127.0.0.1:6379> del key [key ...] 127.0.0.1:6379> del zset (integer) 1 127.0.0.1:6379> exists zset1 (integer) 0
expire
设置一个key的过期时间
ttl 查看一个key的距离过期时间
127.0.0.1:6379> set guo guozhen OK 127.0.0.1:6379> expire guo 10 (integer) 1 127.0.0.1:6379> ttl guo (integer) 8 127.0.0.1:6379> ttl guo (integer) 4 127.0.0.1:6379> ttl guo (integer) 1 127.0.0.1:6379> ttlguo (error) ERR unknown command 'ttlguo' 127.0.0.1:6379> ttl guo (integer) -2 127.0.0.1:6379> get guo (nil)
redis数据库概念：
redis默认拥有0~15 16个数据库。默认启用redis客户端进入的就是0数据库
move
将当前数据库中的key转移到其他数据库当中
127.0.0.1:6379> exists age (integer) 1 127.0.0.1:6379> get age "21" 127.0.0.1:6379> select 1 OK 127.0.0.1:6379[1]> exists age (integer) 0 127.0.0.1:6379[1]> select 1 OK 127.0.0.1:6379[1]> select 0 OK 127.0.0.1:6379> move age 1 (integer) 1 127.0.0.1:6379> exists age (integer) 0 127.0.0.1:6379> select 1 OK 127.0.0.1:6379[1]> exists age (integer) 1 127.0.0.1:6379[1]> get age "21"
persist
移除给定key的过期时间
127.0.0.1:6379> get name "guodaxia:guozhen" 127.0.0.1:6379> expire name 40 (integer) 1 127.0.0.1:6379> ttl name (integer) 28 127.0.0.1:6379> ttkl name (error) ERR unknown command 'ttkl' 127.0.0.1:6379> ttl name (integer) 14 127.0.0.1:6379> persist name (integer) 1 127.0.0.1:6379> ttl name (integer) -1 127.0.0.1:6379> expire name 10 (integer) 1 127.0.0.1:6379> ttl name (integer) 4 127.0.0.1:6379> ttl name (integer) -2 127.0.0.1:6379> get name (nil)
ttl得到-1表示该key没有过期时间，ttl得到-2表示已经过期
randomkey
随机返回数据库里面的一个key
127.0.0.1:6379> RANDOMKEY "set_five" 127.0.0.1:6379>
rename
重命名key
127.0.0.1:6379> keys * 1) "set_four" 2) "list_one" 3) "firstname" 4) "user" 5) "lastname" 6) "set_three" 7) "set_one" 8) "set_two" 9) "one" 10) "set_five" 127.0.0.1:6379> rename set_four set_four001 OK 127.0.0.1:6379> keys * 1) "list_one" 2) "firstname" 3) "user" 4) "lastname" 5) "set_three" 6) "set_one" 7) "set_two" 8) "one" 9) "set_five" 10) "set_four001"
type
返回值的类型
127.0.0.1:6379> type set_four001 set 127.0.0.1:6379> type list_one list 127.0.0.1:6379> type firstname string
服务器相关命令
ping
测试连接是否存活（类似网络哪种ping，表示redis是否正常通信），成功返回pong
127.0.0.1:6379> ping PONG
echo
在命令行打印一些内容
127.0.0.1:6379> echo nihao "nihao"
select
选择数据库
127.0.0.1:6379> select 1 OK 127.0.0.1:6379[1]> get firstname (nil) 127.0.0.1:6379[1]> select 0 OK 127.0.0.1:6379> get firstname "zhen"
quit
退出连接
dbsize
返回当前数据库中所有key的数量
127.0.0.1:6379> dbsize (integer) 11 127.0.0.1:6379> select 1 OK 127.0.0.1:6379[1]> dbsize (integer) 1 127.0.0.1:6379[1]> select 2 OK 127.0.0.1:6379[2]> dbsize (integer) 0
info
获取服务器信息和统计
127.0.0.1:6379> info # Server redis_version:3.2.100 redis_git_sha1:00000000 redis_git_dirty:0 redis_build_id:dd26f1f93c5130ee redis_mode:standalone os:Windows arch_bits:64 multiplexing_api:WinSock_IOCP process_id:5736 run_id:073d64df2ea79075f22979ff6bac0e97b1647506 tcp_port:6379 uptime_in_seconds:309 uptime_in_days:0 hz:10 lru_clock:13854304 executable:D:\Program Files\redis\Redis\redis-server.exe config_file: # Clients connected_clients:1 client_longest_output_list:0 client_biggest_input_buf:0 blocked_clients:0 # Memory used_memory:694248 used_memory_human:677.98K used_memory_rss:656472 used_memory_rss_human:641.09K used_memory_peak:770360 used_memory_peak_human:752.30K total_system_memory:0 total_system_memory_human:0B used_memory_lua:37888 used_memory_lua_human:37.00K maxmemory:0 maxmemory_human:0B maxmemory_policy:noeviction mem_fragmentation_ratio:0.95 mem_allocator:jemalloc-3.6.0 # Persistence loading:0 rdb_changes_since_last_save:0 rdb_bgsave_in_progress:0 rdb_last_save_time:1490249003 rdb_last_bgsave_status:ok rdb_last_bgsave_time_sec:-1 rdb_current_bgsave_time_sec:-1 aof_enabled:0 aof_rewrite_in_progress:0 aof_rewrite_scheduled:0 aof_last_rewrite_time_sec:-1 aof_current_rewrite_time_sec:-1 aof_last_bgrewrite_status:ok aof_last_write_status:ok # Stats total_connections_received:2 total_commands_processed:10 instantaneous_ops_per_sec:0 total_net_input_bytes:204 total_net_output_bytes:11859197 instantaneous_input_kbps:0.01 instantaneous_output_kbps:0.00 rejected_connections:0 sync_full:0 sync_partial_ok:0 sync_partial_err:0 expired_keys:0 evicted_keys:0 keyspace_hits:0 keyspace_misses:0 pubsub_channels:0 pubsub_patterns:0 latest_fork_usec:0 migrate_cached_sockets:0 # Replication role:master connected_slaves:0 master_repl_offset:0 repl_backlog_active:0 repl_backlog_size:1048576 repl_backlog_first_byte_offset:0 repl_backlog_histlen:0 # CPU used_cpu_sys:0.53 used_cpu_user:0.30 used_cpu_sys_children:0.00 used_cpu_user_children:0.00 # Cluster cluster_enabled:0 # Keyspace db0:keys=11,expires=0,avg_ttl=0 db1:keys=1,expires=0,avg_ttl=0
config get
实时传储收到的请求
例子中获取dir这个参数配置的值，如果要获取所有配置参数的值 只要执行config get *即可
127.0.0.1:6379> config get * 1) "dbfilename" 2) "dump.rdb" 3) "requirepass" 4) "" 5) "masterauth" 6) "" 7) "unixsocket" 8) "" 9) "logfile" 10) "" 11) "pidfile" 12) "" 13) "maxmemory" 14) "0" 15) "maxmemory-samples" 16) "5" 17) "timeout" 18) "0" 19) "auto-aof-rewrite-percentage" 20) "100" 21) "auto-aof-rewrite-min-size" 22) "67108864" 23) "hash-max-ziplist-entries" 24) "512" 25) "hash-max-ziplist-value" 26) "64" 27) "list-max-ziplist-size" 28) "-2" 29) "list-compress-depth" 30) "0" 31) "set-max-intset-entries" 32) "512" 33) "zset-max-ziplist-entries" 34) "128" 35) "zset-max-ziplist-value" 36) "64" 37) "hll-sparse-max-bytes" 38) "3000" 39) "lua-time-limit" 40) "5000" 41) "slowlog-log-slower-than" 42) "10000" 43) "latency-monitor-threshold" 44) "0" 45) "slowlog-max-len" 46) "128" 47) "port" 48) "6379" 49) "tcp-backlog" 50) "511" 51) "databases" 52) "16" 53) "repl-ping-slave-period" 54) "10" 55) "repl-timeout" 56) "60" 57) "repl-backlog-size" 58) "1048576" 59) "repl-backlog-ttl" 60) "3600" 61) "maxclients" 62) "10000" 63) "watchdog-period" 64) "0" 65) "slave-priority" 66) "100" 67) "min-slaves-to-write" 68) "0" 69) "min-slaves-max-lag" 70) "10" 71) "hz" 72) "10" 73) "cluster-node-timeout" 74) "15000" 75) "cluster-migration-barrier" 76) "1" 77) "cluster-slave-validity-factor" 78) "10" 79) "repl-diskless-sync-delay" 80) "5" 81) "tcp-keepalive" 82) "0" 83) "cluster-require-full-coverage" 84) "yes" 85) "no-appendfsync-on-rewrite" 86) "no" 87) "slave-serve-stale-data" 88) "yes" 89) "slave-read-only" 90) "yes" 91) "stop-writes-on-bgsave-error" 92) "yes" 93) "daemonize" 94) "no" 95) "rdbcompression" 96) "yes" 97) "rdbchecksum" 98) "yes" 99) "activerehashing" 100) "yes" 101) "protected-mode" 102) "yes" 103) "repl-disable-tcp-nodelay" 104) "no" 105) "repl-diskless-sync" 106) "no" 107) "aof-rewrite-incremental-fsync" 108) "yes" 109) "aof-load-truncated" 110) "yes" 111) "maxmemory-policy" 112) "noeviction" 113) "loglevel" 114) "notice" 115) "supervised" 116) "no" 117) "appendfsync" 118) "everysec" 119) "appendonly" 120) "no" 121) "dir" 122) "D:\\Program Files\\redis\\Redis" 123) "save" 124) "jd 3600 jd 300 jd 60" 125) "client-output-buffer-limit" 126) "normal 0 0 0 slave 268435456 67108864 60 pubsub 33554432 8388608 60" 127) "unixsocketperm" 128) "0" 129) "slaveof" 130) "" 131) "notify-keyspace-events" 132) "" 133) "bind" 134) "" 127.0.0.1:6379> config get dir 1) "dir" 2) "D:\\Program Files\\redis\\Redis" 127.0.0.1:6379>
flushdb
删除当前数据库中的所有key
127.0.0.1:6379> keys * 1) "name" 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]> set name guozhen OK 127.0.0.1:6379[1]> flushdb OK 127.0.0.1:6379[1]> keys * (empty list or set) 127.0.0.1:6379[1]> select 0 OK 127.0.0.1:6379> keys * 1) "name"
flushall
删除所有数据库里面的所有key
127.0.0.1:6379> keys * 1) "name" 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]> set name guozhen OK 127.0.0.1:6379[1]> flushall OK 127.0.0.1:6379[1]> keys * (empty list or set) 127.0.0.1:6379[1]> select 0 OK 127.0.0.1:6379> keys * 1) (empty list or set)
