ZooKeeper的配置文件zoo.cfg内容如下：
# The number of milliseconds of each tick
tickTime=2000
# The number of ticks that the initial
# synchronization phase can take
initLimit=10
# The number of ticks that can pass between
# sending a request and getting an acknowledgement
syncLimit=5
# the directory where the snapshot is stored.
# do not use /tmp for storage, /tmp here is just
# example sakes.
dataDir=D:\\zookeeper-3.4.14\\data
# the port at which the clients will connect
clientPort=2181
# the maximum number of client connections.
# increase this if you need to handle more clients
#maxClientCnxns=60
#
# Be sure to read the maintenance section of the
# administrator guide before turning on autopurge.
#
# http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
#
# The number of snapshots to retain in dataDir
#autopurge.snapRetainCount=3
# Purge task interval in hours
# Set to "0" to disable auto purge feature
#autopurge.purgeInterval=1
tickTime=2000：通信心跳数，ZooKeeper服务器与客户端心跳时间，ZooKeeper使用的基本时间，服务器之间或客户端与服务器之间维持心跳的时间间隔，也就是每个tickTime时间就会发送一个心跳，时间单位为毫秒。它用于心跳机制，并且设置最小的session超时时间为两倍心跳时间。（session的最小超时时间是2*tickTime）。initLimit=10：Leader和Follower之间的初始通信时限，集群中的Follower服务器与Leader服务器之间的初始连接时能容忍的最大心跳数（tickTime的数量），用它来限定集群中的ZooKeeper服务器连接到Leader的时限。syncLimit=5：Leader和Follower之间的同步通信时限，集群中Leader与Follower之间的最大响应时间单位，如果响应时间超过syncLimit * tickTime，Leader认为Follower挂掉，从服务器列表中删除Follower。dataDir=D:\\zookeeper-3.4.14\\data：数据文件目录 + 数据持久化的路径，主要用于保存ZooKeeper中的数据。默认是dataDir=/tmp/zookeeperclientPort=2181：客户端连接端口，监听客户端连接的端口。- 其他参数后续补充。。。