Zookeeper四字命令

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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 2181imokecho mntr | nc www.iteblog.com 2181zk_version  3.4.6-1569965, built on 02/20/2014 09:09 GMTzk_avg_latency  0zk_max_latency  604zk_min_latency  0zk_packets_received 20774241zk_packets_sent 20785689zk_num_alive_connections  79zk_outstanding_requests 4zk_server_state followerzk_znode_count  10698zk_watch_count  459zk_ephemerals_count 2607zk_approximate_data_size  1207785zk_open_file_descriptor_count 104zk_max_file_descriptor_count  65536echo conf | nc www.iteblog.com 2181clientPort=2181dataDir=/home/iteblog/zookeeper/data/zk/version-2dataLogDir=/home/iteblog/zookeeper/data/zk/version-2tickTime=2000maxClientCnxns=60minSessionTimeout=4000maxSessionTimeout=40000serverId=3initLimit=10syncLimit=5electionAlg=3electionPort=3881quorumPort=2881peerType=0

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