命令使用:
1 | redis-cli [OPTIONS] [cmd [arg [arg ...]]] |
选项说明:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 | -h Server hostname (default: 127.0.0.1). ip地址-p Server port (default: 6379). 服务器端口号-s Server socket (overrides hostname and port).-a Password to use when connecting to the server. 密码-u Server URI. url格式的地址-r Execute specified command N times.-i When -r is used, waits seconds per command. It is possible to specify sub-second times like -i 0.1.-n Database number. 指定数据库-x Read last argument from STDIN.-d Multi-bulk delimiter in for raw formatting (default: n).-c Enable cluster mode (follow -ASK and -MOVED redirections).--raw Use raw formatting for replies (default when STDOUT is not a tty).--no-raw Force formatted output even when STDOUT is not a tty.--csv Output in CSV format.--stat Print rolling stats about server: mem, clients, ... 统计数据 连续输出--latency Enter a special mode continuously sampling latency. If you use this mode in an interactive session it runs forever displaying real-time stats. Otherwise if --raw or --csv is specified, or if you redirect the output to a non TTY, it samples the latency for 1 second (you can use -i to change the interval), then produces a single output and exits. 延时统计--latency-history Like --latency but tracking latency changes over time. Default time interval is 15 sec. Change it using -i.--latency-dist Shows latency as a spectrum, requires xterm 256 colors. Default time interval is 1 sec. Change it using -i.--lru-test Simulate a cache workload with an 80-20 distribution.--replica Simulate a replica showing commands received from the master.--rdb Transfer an RDB dump from remote server to local file. 导出rdb文件--pipe Transfer raw Redis protocol from stdin to server.管道模式--pipe-timeout In --pipe mode, abort with error if after sending all data. no reply is received within seconds. Default timeout: 30. Use 0 to wait forever. 管道超时--bigkeys Sample Redis keys looking for big keys.--hotkeys Sample Redis keys looking for hot keys. only works when maxmemory-policy is *lfu.--scan List all keys using the SCAN command.获取服务器所有的键--pattern Useful with --scan to specify a SCAN pattern.正则表达式 用于scan命令中--intrinsic-latency Run a test to measure intrinsic system latency. The test will run for the specified amount of seconds.--eval Send an EVAL command using the Lua script at .--ldb Used with --eval enable the Redis Lua debugger.--ldb-sync-mode Like --ldb but uses the synchronous Lua debugger, in this mode the server is blocked and script changes are not rolled back from the server memory.--cluster [args...] [opts...] Cluster Manager command and arguments (see below).--verbose Verbose mode.--no-auth-warning Don't show warning message when using password on command line interface. |
注意：
-u 选项中url格式参考文档https://www.iana.org/assignments/uri-schemes/prov/redis
格式为：redis://user:secret@localhost:6379/0?foo=bar&qux=baz
举例：
1 2 3 4 5 6 7 8 9 10 11 12 | root@hylaz:~# redis-cli127.0.0.1:6379> set name hylazOK127.0.0.1:6379> quitroot@hylaz:~# redis-cli -h 127.0.0.1127.0.0.1:6379> get name"hylaz"127.0.0.1:6379> select 6127.0.0.1:6379[6]> root@hylaz:~# redis-cli -h 127.0.0.1 -p 6379 -n 2127.0.0.1:6379[2]> get age |
server中统计选项
1 2 3 4 5 6 7 | root@hylaz:~# redis-cli --stat------- data ------ --------------------- load -------------------- - child -keys mem clients blocked requests connections 11 835.52K 1 0 12 (+0) 5 11 835.52K 1 0 13 (+1) 5 11 835.52K 1 0 14 (+1) 5 11 835.52K 1 0 15 (+1) 5 |
列表中选项说明：
| 选项 | 含义 |
|---|---|
| keys | server中key的数量 |
| mem | 键值对的总内存量 |
| clients | 当前连接的总clients数量 |
| blocked | 当前阻塞的客户端数量 |
| requests | 服务器请求总次数 (+1) 截止上次请求增加次数 |
| connections | 服务器连接次数 |
使用info命令获取服务器的信息
导入rdb文件 命令：redis-cli –rdb rdb.log
1 2 3 | root@hylaz:~# redis-cli --rdb rdb.logSYNC sent to master, writing 344 bytes to 'rdb.log'Transfer finished with success. |
该命令选项实现：
- 向server发送SYNC命令，返回需要写的总字节数
- 从server读取总字节数据写到指定文件中
找出各种数据类型的最大键值对
命令：redis-cli –big-keys
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | root@hylaz:~# redis-cli --bigkeys # Scanning the entire keyspace to find biggest keys as well as# average sizes per key type. You can use -i 0.1 to sleep 0.1 sec# per 100 SCAN commands (not usually needed). [00.00%] Biggest string found so far 'name1' with 5 bytes[00.00%] Biggest set found so far 'myset' with 1 members[00.00%] Biggest string found so far 'key' with 6 bytes -------- summary ------- Sampled 13 keys in the keyspace!Total key length in bytes is 52 (avg len 4.00) Biggest string found 'key' has 6 bytesBiggest set found 'myset' has 1 members 12 strings with 33 bytes (92.31% of keys, avg size 2.75)0 lists with 0 items (00.00% of keys, avg size 0.00)1 sets with 1 members (07.69% of keys, avg size 1.00)0 hashs with 0 fields (00.00% of keys, avg size 0.00)0 zsets with 0 members (00.00% of keys, avg size 0.00)0 streams with 0 entries (00.00% of keys, avg size 0.00) |
该选项实现：通过使用scan命令遍历server中的键值对，针对不同数据类型进行统计，
找出server中热点key 命令：redis-cli –hotkeys
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | # Scanning the entire keyspace to find hot keys as well as# average sizes per key type. You can use -i 0.1 to sleep 0.1 sec# per 100 SCAN commands (not usually needed). [00.00%] Hot key 'dd' found so far with counter 4[00.00%] Hot key 'myset' found so far with counter 5[00.00%] Hot key 'a' found so far with counter 5[00.00%] Hot key 'dds' found so far with counter 4[71.43%] Hot key 'aa' found so far with counter 4[71.43%] Hot key 'key' found so far with counter 4 -------- summary ------- Sampled 14 keys in the keyspace!hot key found with counter: 5 keyname: mysethot key found with counter: 5 keyname: ahot key found with counter: 4 keyname: ddhot key found with counter: 4 keyname: ddshot key found with counter: 4 keyname: aahot key found with counter: 4 keyname: key |
选项实现：
1. redis实现8种缓存淘汰策略：
voltile-lru：从已设置过期时间的数据集（server.db[i].expires）中挑选最近最少使用的数据淘汰
volatile-ttl：从已设置过期时间的数据集（server.db[i].expires）中挑选将要过期的数据淘汰
volatile-random：从已设置过期时间的数据集（server.db[i].expires）中任意选择数据淘汰
volatile-lfu: 从已设置过期时间的数据集驱逐使用频率最少的键
allkeys-lru:从数据集（server.db[i].dict）中挑选最近最少使用的数据淘汰
allkeys-lfu: 从所有键中驱逐使用频率最少的键
allkeys-random：从数据集（server.db[i].dict）中任意选择数据淘汰
no-enviction（驱逐）：禁止驱逐数据 当内存不足以容纳新写入数据时，新写入操作会报错
需要设置淘汰策略为lru或者lfu
2. 命令实现使用scan命令遍历所有的键值对，针对每个键值对使用OBJECT freq 获取该键值对的信息
到此这篇关于redis-cli 命令详解的文章就介绍到这了,更多相关redis-cli 命令内容请搜索IT俱乐部以前的文章或继续浏览下面的相关文章希望大家以后多多支持IT俱乐部！
