Slave Replication) 详解(5)

#redis提供了可以让master停止写入的方式，如果配置了min-slaves-to-write，健康的slave的个数小于N，mater就禁止写入。master最少得有多少个健康的slave存活才能执行写命令。这个配置虽然不能保证N个slave都一定能接收到master的写操作，但是能避免没有足够健康的slave的时候，master不能写入来避免数据丢失。设置为0是关闭该功能。

# min-slaves-to-write 3

# 延迟小于min-slaves-max-lag秒的slave才认为是健康的slave

# min-slaves-max-lag 10

#设置1或另一个设置为0禁用这个特性。

# Setting one or the other to 0 disables the feature.

#

# By default min-slaves-to-write is set to 0 (feature disabled) and

# min-slaves-max-lag is set to 10.  默认配置

# A Redis master is able to list the address and port of the attached

# slaves in different ways. For example the "INFO replication" section

# offers this information, which is used, among other tools, by

# Redis Sentinel in order to discover slave instances.

# Another place where this info is available is in the output of the

# "ROLE" command of a masteer.

# Redis master能够以不同的方式列出所连接slave的地址和端口。 例如，“INFO replication”部分提供此信息，除了其他工具之外，Redis Sentinel还使用该信息来发现slave实例。 此信息可用的另一个地方在masterser的“ROLE”命令的输出中。

#

# The listed IP and address normally reported by a slave is obtained

# in the following way:

#通常由slave报告的列出的IP和地址,通过以下方式获得：

#   IP: The address is auto detected by checking the peer address

#   of the socket used by the slave to connect with the master.

#IP：通过检查slave与master连接使用的套接字的对等体地址自动检测地址。

#   Port: The port is communicated by the slave during the replication

#   handshake, and is normally the port that the slave is using to

#   list for connections.

#端口：端口在复制握手期间由slavet通信，并且通常是slave正在使用列出连接的端口。

# However when port forwarding or Network Address Translation (NAT) is

# used, the slave may be actually reachable via different IP and port

# pairs. The following two options can be used by a slave in order to

# report to its master a specific set of IP and port, so that both INFO

# and ROLE will report those values.

#然而，当使用端口转发或网络地址转换（NAT）时，slave实际上可以通过(不同的IP和端口对)来到达。 slave可以使用以下两个选项，以便向master报告一组特定的IP和端口，以便INFO和ROLE将报告这些值。

# There is no need to use both the options if you need to override just

# the port or the IP address. 如果你需要仅覆盖端口或IP地址，则没必要使用这两个选项。

#

# slave-announce-ip 5.5.5.5

# slave-announce-port 1234

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