Zookeeper配置文件参数与含义

zoo.cfg

 

# 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=/home/myuser/zooA/data  

# the port at which the clients will connect  
clientPort=2181  

# ZooKeeper server and its port no. # ZooKeeper ensemble should know about every other machine in the ensemble # specify server id by creating 'myid' file in the dataDir # use hostname instead of IP address for convenient maintenance
server.1=127.0.0.1:2888:3888  
server.2=127.0.0.1:2988:3988   
server.3=127.0.0.1:2088:3088  

#  
# 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  
dataLogDir=/home/myuser/zooA/log 

　　

 

tickTime：心跳时间，为了确保连接存在的，以毫秒为单位，最小超时时间为两个心跳时间

initLimit：多少个心跳时间内，允许其他server连接并初始化数据，如果ZooKeeper管理的数据较大，则应相应增大这个值

clientPort：服务的监听端口

dataDir：用于存放内存数据库快照的文件夹，同时用于集群的myid文件也存在这个文件夹里（注意：一个配置文件只能包含一个dataDir字样，即使它被注释掉了。）

dataLogDir：用于单独设置transaction log的目录，transaction log分离可以避免和普通log还有快照的竞争

syncLimit：多少个tickTime内，允许follower同步，如果follower落后太多，则会被丢弃。

 

server.A=B：C：D：
A是一个数字,表示这个是第几号服务器,B是这个服务器的ip地址
C第一个端口用来集群成员的信息交换,表示的是这个服务器与集群中的Leader服务器交换信息的端口
D是在leader挂掉时专门用来进行选举leader所用