Redis Notes

database

Installation

brew install redis

Redis-cli

redis-cli is the Redis command line interface which allow you interact with redis server see on offcial site

connect to server

redis-cli -h yourHost -p yourPort

# enable cluster mode
redis-cli -c -h yourHost -p yourPort

all usage

Usage: redis-cli [OPTIONS] [cmd [arg [arg ...]]]
  -h <hostname>    Server hostname (default: 127.0.0.1)
  -p <port>        Server port (default: 6379)
  -s <socket>      Server socket (overrides hostname and port)
  -a <password>    Password to use when connecting to the server
  -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
  -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)
  --latency        Enter a special mode continuously sampling latency
  --slave          Simulate a slave showing commands received from the master
  --rdb <filename> Transfer an RDB dump from remote server to local file.
  --pipe           Transfer raw Redis protocol from stdin to server
  --bigkeys        Sample Redis keys looking for big keys
  --eval <file>    Send an EVAL command using the Lua script at <file>
  --help           Output this help and exit
  --version        Output version and exit

Examples:
  cat /etc/passwd | redis-cli -x set mypasswd
  redis-cli get mypasswd
  redis-cli -r 100 lpush mylist x
  redis-cli -r 100 -i 1 info | grep used_memory_human:
  redis-cli --eval myscript.lua key1 key2 , arg1 arg2 arg3
  (Note: when using --eval the comma separates KEYS[] from ARGV[] items)

When no command is given, redis-cli starts in interactive mode.
Type "help" in interactive mode for information on available commands.

Data Types

to be continued…

Redis Persistence

When using redis as primary data store, how to do the backup mechanism for data becomes very important. Redis prodvides two kind pesistence options: RDB and AOF. see more on offical site

Redis Cluster

see specification

Other

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