Zookeeper四字命令

ZooKeeper 支持某些特定的四字命令(The Four Letter Words)与其进行交互。它们大多是查询命令，用来获取 ZooKeeper 服务的当前状态及相关信息。用户在客户端可以通过 telnet 或 nc 向 ZooKeeper 提交相应的命令。 ZooKeeper 常用四字命令主要如下：



如何使用echo ruok | nc www.iteblog.com 2181
imok

echo mntr | nc www.iteblog.com 2181
zk_version 3.4.6-1569965, built on 02/20/2014 09:09 GMT
zk_avg_latency 0
zk_max_latency 604
zk_min_latency 0
zk_packets_received 20774241
zk_packets_sent 20785689
zk_num_alive_connections 79
zk_outstanding_requests 4
zk_server_state follower
zk_znode_count 10698
zk_watch_count 459
zk_ephemerals_count 2607
zk_approximate_data_size 1207785
zk_open_file_descriptor_count 104
zk_max_file_descriptor_count 65536

echo conf | nc www.iteblog.com 2181
clientPort=2181
dataDir=/home/iteblog/zookeeper/data/zk/version-2
dataLogDir=/home/iteblog/zookeeper/data/zk/version-2
tickTime=2000
maxClientCnxns=60
minSessionTimeout=4000
maxSessionTimeout=40000
serverId=3
initLimit=10
syncLimit=5
electionAlg=3
electionPort=3881
quorumPort=2881
peerType=0