# TCP keepalive.
#
# If non-zero, use SO_KEEPALIVE to send TCP ACKs to clients in absence
# of communication. This is useful for two reasons:
#
# 1) Detect dead peers.
# 2) Take the connection alive from the point of view of network
# equipment in the middle.
#
# On Linux, the specified value (in seconds) is the period used to send ACKs.
# Note that to close the connection the double of the time is needed.
# On other kernels the period depends on the kernel configuration.
#
# A reasonable value for this option is 60 seconds.
# TCP keepalive.
# 如果非零，则设置SO_KEEPALIVE选项来向空闲连接的客户端发送ACK，由于以下两个原因这是很有用的：
#
# 1）能够检测无响应的对端
# 2）让该连接中间的网络设备知道这个连接还存活
#
# 在Linux上，这个指定的值(单位：秒)就是发送ACK的时间间隔。
# 注意：要关闭这个连接需要两倍的这个时间值。
# 在其他内核上这个时间间隔由内核配置决定
#
# 这个选项的一个合理值是60秒
tcp-keepalive 0
# 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)
# 指定服务器调试等级
# 可能值：
# debug （大量信息，对开发/测试有用）
# verbose （很多精简的有用信息，但是不像debug等级那么多）
# notice （适量的信息，基本上是你生产环境中需要的）
# warning （只有很重要/严重的信息会记录下来）
loglevel notice
# Specify the log file name. Also the empty string can be used to force
# Redis to log on the standard output. Note that if you use standard
# output for logging but daemonize, logs will be sent to /dev/null
# 指明日志文件名。也可以使用""来强制让Redis把日志信息写到标准输出上。
# 注意:如果Redis以守护进程方式运行，而设置日志显示到标准输出的话，日志会发送到/dev/null
logfile ""
# To enable logging to the system logger, just set 'syslog-enabled' to yes,
# and optionally update the other syslog parameters to suit your needs.
# 要使用系统日志记录器，只要设置 "syslog-enabled" 为 "yes" 就可以了。
# 然后根据需要设置其他一些syslog参数就可以了。
# syslog-enabled no
# Specify the syslog identity.
# 指明syslog身份
# syslog-ident redis
# Specify the syslog facility. Must be USER or between LOCAL0-LOCAL7.
# 指明syslog的设备。必须是user或LOCAL0 ~ LOCAL7之一。
# syslog-facility local0
# Set the number of databases. The default database is DB 0, you can select
# a different one on a per-connection basis using SELECT <dbid> where
# dbid is a number between 0 and 'databases'-1
# 设置数据库个数。默认数据库是 DB 0，
# 可以通过select <dbid> (0 <= dbid <= 'databases' - 1 ）来为每个连接使用不同的数据库。
databases 16
################################ SNAPSHOTTING ################################
#
# 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 ""
#
# 把数据库存到磁盘上:
#
# save <seconds> <changes>
#
# 会在指定秒数和数据变化次数之后把数据库写到磁盘上。
#
# 下面的例子将会进行把数据写入磁盘的操作:
# 900秒（15分钟）之后，且至少1次变更
# 300秒（5分钟）之后，且至少10次变更
# 60秒之后，且至少10000次变更
#
# 注意：你要想不写磁盘的话就把所有 "save" 设置注释掉就行了。
#
# 通过添加一条带空字符串参数的save指令也能移除之前所有配置的save指令
# 像下面的例子：
# save ""
save 900 1
save 300 10
save 60 10000