Redis - MRLIVING/Becca GitHub Wiki

Redis-cli

• installation under Ubuntu
  apt-get install redis-tools

• connect to redis
  redis-cli -h ${HOST} -p 6379

Data type and commands

• Strings - Redis Strings are binary safe.

  • SET key value
  • GET key
  • APPEND key value

• Redis keys

  • EXPIRE key seconds
  • TTL key
  • SCAN cursor [MATCH pattern] [COUNT count]
    • list of keys
      redis-cli -h $HOST --scan --pattern '*-11*'
    • count the number of keys with the specific pattern, e.g.
      redis-cli -h {$HOST} --scan --pattern '*_mod/breadcrumb*' | wc -l
  • KEYS pattern
    • notice that you should always consider scan instead of keys to prevent block redis server.
  • DEL key [key ...]
    • del keys by specific pattern
      redis-cli -h ${HOST} --scan --pattern '*_mod*' | xargs redis-cli -h ${HOST} del
redis-cli -h ${HOST} --scan --pattern '*_mod*' | xargs redis-cli -h ${HOST} unlink redis-cli -h ${HOST} --scan --pattern '*_opp*' | sed 's/""|/|/g' | xargs redis-cli -h ${HOST} del
  • FLUSHALL

• Lists - Redis lists are implemented via Linked Lists

  • LPUSH key value [value ...]
  • RPUSH key value [value ...]
  • LRANGE key start stop
  • LTRIM key start stop

• Sorted sets

  • ZADD key score member [score member ...]
  • ZRANGE key start stop [WITHSCORES], lowest to the highest
  • ZREVRANGE key start stop [WITHSCORES], highest to the lowest
  • ZREMRANGEBYRANK key start stop
    zremrangebyrank key 0 -4, keep top 3 hightest scoring members.