Zookeeper学习笔记

启动zk server

zkServer start // or in linux: zkServer.sh start

配置conf/zoo.cfg

• tickTime
  the basic time unit in milliseconds used by ZooKeeper. It is used to do heartbeats and the minimum session timeout will be twice the tickTime.
• dataDir
  the location to store the in-memory database snapshots and, unless specified otherwise, the transaction log of updates to the database.
• clientPort
  the port to listen for client connections
• initLimit
  initLimit is timeouts ZooKeeper uses to limit the length of time the ZooKeeper servers in quorum have to connect to a leader.
• syncLimit
  syncLimit limits how far out of date a server can be from a leader
• server.1=localhost:2888:3888 # zk cluster

client connect to zk server:

zkCli -server server_ip:2181

#creates a new znode and associates the string "my_data" with the node
create /zk_test my_data

# list zk nodes
ls /
ls /abc/def

# get node_name detail info
get /node_name
get /node_name/sub_node

# set the data associated with node_name
set /node_name data

# delete the node
delete /node_name