详解redis-cli 命令

redis-cli [OPTIONS] [cmd [arg [arg …]]]

-h <hostname> Server hostname (default: 127.0.0.1). ip地址
-p <port> Server port (default: 6379).　服务器端口号
-s <socket> Server socket (overrides hostname and port).
-a <password> Password to use when connecting to the server.　密码
-u <uri> Server URI.　url格式的地址
-r <repeat> Execute specified command N times.
-i <interval> When -r is used, waits <interval> seconds per command.
It is possible to specify sub-second times like -i 0.1.
-n <db> Database number.　指定数据库
-x Read last argument from STDIN.
-d <delimiter> 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 <keys> Simulate a cache workload with an 80-20 distribution.
–replica Simulate a replica showing commands received from the master.
–rdb <filename> 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 <n> In –pipe mode, abort with error if after sending all data.
no reply is received within <n> 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 <pat> Useful with –scan to specify a SCAN pattern.
正则表达式　用于scan命令中
–intrinsic-latency <sec> Run a test to measure intrinsic system latency.
The test will run for the specified amount of seconds.
–eval <file> Send an EVAL command using the Lua script at <file>.
–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 <command> [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.

root@hylaz:~# redis-cli
127.0.0.1:6379> set name hylaz
OK
127.0.0.1:6379> quit
root@hylaz:~# redis-cli -h 127.0.0.1
127.0.0.1:6379> get name
“hylaz”
127.0.0.1:6379> select 6
127.0.0.1:6379[6]>

root@hylaz:~# redis-cli -h 127.0.0.1 -p 6379 -n 2
127.0.0.1:6379[2]> get age

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

root@hylaz:~# redis-cli –rdb rdb.log
SYNC sent to master, writing 344 bytes to ‘rdb.log’
Transfer finished with success.

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 bytes
Biggest 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)

# 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: myset
hot key found with counter: 5 keyname: a
hot key found with counter: 4 keyname: dd
hot key found with counter: 4 keyname: dds
hot key found with counter: 4 keyname: aa
hot key found with counter: 4 keyname: key