redis的配置简介

Redis的配置文件

redis启动的时候依赖的配置文件

• 配置文件对单位的大小写不敏感

  # Redis configuration file example.
  #
  # Note that in order to read the configuration file, Redis must be
  # started with the file path as first argument:
  #
  # ./redis-server /path/to/redis.conf
  
  # Note on units: when memory size is needed, it is possible to specify
  # it in the usual form of 1k 5GB 4M and so forth:
  #
  # 1k => 1000 bytes
  # 1kb => 1024 bytes
  # 1m => 1000000 bytes
  # 1mb => 1024*1024 bytes
  # 1g => 1000000000 bytes
  # 1gb => 1024*1024*1024 bytes
  

• 可以使用include来包含别的文件

  # Include one or more other config files here.  This is useful if you
  # have a standard template that goes to all Redis servers but also need
  # to customize a few per-server settings.  Include files can include
  # other files, so use this wisely.
  #
  # Notice option "include" won't be rewritten by command "CONFIG REWRITE"
  # from admin or Redis Sentinel. Since Redis always uses the last processed
  # line as value of a configuration directive, you'd better put includes
  # at the beginning of this file to avoid overwriting config change at runtime.
  #
  # If instead you are interested in using includes to override configuration
  # options, it is better to use include as the last line.
  #
  # include /path/to/local.conf
  # include /path/to/other.conf
  

• 网络模块

  bind：可以使用通配符或者自己的公网ip来使我们的redis服务能够公开

  protected-mode：是否开始保护模式

  port：绑定的端口

• 通用的配置

  daemobize：是否开启守护进程,默认是no

  pidfile：如果是守护进程的方式运行，则需要制定这个配置文件

  loglevel：日志级别

  # Specify the server verbosity level.
  # This can be one of:
  # debug (a lot of information, useful for development/testing)
  # verbose (many rarely useful info, but not a mess like the debug level)
  # notice (moderately verbose, what you want in production probably)
  # warning (only very important / critical messages are logged)
  loglevel notice
  

  logfile：日志的文件名

  databases：数据库的数量，默认是16个数据库

  always-show-logo：是否显示开启时候的logo

• 快照

  持久化，在规定的时间内执行了多少次的操作，则会生快照

  一般会有rdb和aof两个文件

  • 默认的规则

    # Save the DB on disk:
    #
    #   save <seconds> <changes>
    #
    #   Will save the DB if both the given number of seconds and the given
    #   number of write operations against the DB occurred.
    #
    #   In the example below the behaviour will be to save:
    #   after 900 sec (15 min) if at least 1 key changed
    #   after 300 sec (5 min) if at least 10 keys changed
    #   after 60 sec if at least 10000 keys changed
    #
    #   Note: you can disable saving completely by commenting out all "save" lines.
    #
    #   It is also possible to remove all the previously configured save
    #   points by adding a save directive with a single empty string argument
    #   like in the following example:
    #
    #   save ""
    
    # 如果900s内，有一次key进行了修改，那么就进行持久化操作
    save 900 1 
    # 如果300s内，有超过10个key进行了修改，那么就进行持久化操作
    save 300 10
    # 如果60s内，有超过10000个key进行了修改，那么就进行持久化操作
    save 60 10000
    

  • stop-writes-on-bgsave-error：持久化出现错误后是否继续工作

  • rdbcompression：是否压缩rdb文件

  • rdbchecksum：保存rdb文件的时候进行校验

  • dir：rdb文件保存的目录

• 安全

  requirepass：设置登录密码

• 客户端

  maxclients：最大客户端数

  maxmemory <bytes>：redis最大内存设置

  maxmemory-policy：内存达到上限后的处理策略

  # volatile-lru -> remove the key with an expire set using an LRU algorithm
  # allkeys-lru -> remove any key according to the LRU algorithm
  # volatile-random -> remove a random key with an expire set
  # allkeys-random -> remove a random key, any key
  # volatile-ttl -> remove the key with the nearest expire time (minor TTL)
  # noeviction -> don't expire at all, just return an error on write operations
  #
  # Note: with any of the above policies, Redis will return an error on write
  #       operations, when there are no suitable keys for eviction.
  #
  #       At the date of writing these commands are: set setnx setex append
  #       incr decr rpush lpush rpushx lpushx linsert lset rpoplpush sadd
  #       sinter sinterstore sunion sunionstore sdiff sdiffstore zadd zincrby
  #       zunionstore zinterstore hset hsetnx hmset hincrby incrby decrby
  #       getset mset msetnx exec sort
  #
  # The default is:
  #
  # maxmemory-policy noeviction
  

• APPEND ONLY模式，aof配置

  appendonly：是否开启aof

  appendfilename：aof的文件名

  # appendfsync always ## 每次修改都执行一次
  appendfsync everysec  ## 每秒都执行一次，可能会丢失1s的数据
  # appendfsync no ## 不执行不同步