Redis的配置檔案

redis啟動的時候依賴的配置檔案

• 配置檔案對單位的大小寫不敏感

  # 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來包含別的檔案

  # 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
   
  

• 網路模組

  bind：可以使用萬用字元或者自己的公網ip來使我們的redis服務能夠公開

  protected-mode：是否開始保護模式

  port：繫結的埠

• 通用的配置

  daemobize：是否開啟守護程序,預設是no

  pidfile：如果是守護程序的方式執行，則需要制定這個配置檔案

  loglevel：日誌級別

  # 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：日誌的檔名

  databases：資料庫的數量，預設是16個數據庫

  always-show-logo：是否顯示開啟時候的logo

• 快照

  持久化，在規定的時間內執行了多少次的操作，則會生快照

  一般會有rdb和aof兩個檔案

  • 預設的規則

    # 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內，有一次key進行了修改，那麼就進行持久化操作
    save 900 1 
    # 如果300s內，有超過10個key進行了修改，那麼就進行持久化操作
    save 300 10
    # 如果60s內，有超過10000個key進行了修改，那麼就進行持久化操作
    save 60 10000
    

  • stop-writes-on-bgsave-error：持久化出現錯誤後是否繼續工作

  • rdbcompression：是否壓縮rdb檔案

  • rdbchecksum：儲存rdb檔案的時候進行校驗

  • dir：rdb檔案儲存的目錄

• 安全

  requirepass：設定登入密碼

• 客戶端

  maxclients：最大客戶端數

  maxmemory <bytes>：redis最大記憶體設定

  maxmemory-policy：記憶體達到上限後的處理策略

  # 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：是否開啟aof

  appendfilename：aof的檔名

  # appendfsync always ## 每次修改都執行一次
  appendfsync everysec  ## 每秒都執行一次，可能會丟失1s的資料
  # appendfsync no ## 不執行不同步