我有一个只有2个节点的ZooKeeper集群,每个zoo.conf都有以下
# Servers
server.1=10.138.0.8:2888:3888
server.2=10.138.0.9:2888:3888
两者配置
中存在相同的两行[root@zk1-prod supervisor.d]# echo mntr | nc 10.138.0.8 2181
zk_version 3.4.10-39d3a4f269333c922ed3db283be479f9deacaa0f, built on 03/23/2017 10:13 GMT
zk_avg_latency 0
zk_max_latency 0
zk_min_latency 0
zk_packets_received 5
zk_packets_sent 4
zk_num_alive_connections 1
zk_outstanding_requests 0
zk_server_state follower
zk_znode_count 4
zk_watch_count 0
zk_ephemerals_count 0
zk_approximate_data_size 27
zk_open_file_descriptor_count 28
zk_max_file_descriptor_count 4096
[root@zk1-prod supervisor.d]# echo mntr | nc 10.138.0.9 2181
zk_version 3.4.10-39d3a4f269333c922ed3db283be479f9deacaa0f, built on 03/23/2017 10:13 GMT
zk_avg_latency 0
zk_max_latency 0
zk_min_latency 0
zk_packets_received 3
zk_packets_sent 2
zk_num_alive_connections 1
zk_outstanding_requests 0
zk_server_state leader
zk_znode_count 4
zk_watch_count 0
zk_ephemerals_count 0
zk_approximate_data_size 27
zk_open_file_descriptor_count 29
zk_max_file_descriptor_count 4096
zk_followers 1
zk_synced_followers 1
zk_pending_syncs 0
为什么 zk_znode_count == 4?
答案 0 :(得分:2)
Znodes不是Zookeeper服务器。
来自 Hadoop权威指南 :
Zookeeper没有文件和目录,而是统一的概念 一个名为znode的节点,它既可以作为数据的容器(如a 文件)和其他znode的容器(如目录)。
zk_znode_count
是指该Zookeeper服务器中可用的znode数。在您的ZK集合中,每个服务器都有四个znode。