ZooKeeper做独立服务器运行(下)
作者:chszs,转载需注明。博客主页:http://blog.csdn.net/chszs
四、ZooKeeper Java客户端连接后的命令概述
键入help,可以看到有如下命令:
connecthost:port getpath [watch] lspath [watch] setpath data [version] rmrpath delquota[-n|-b] path quit printwatcheson|off create[-s] [-e] path data acl statpath [watch] close ls2path [watch] history listquotapath setAclpath acl getAclpath syncpath redocmdno addauthscheme auth deletepath [version] setquota-n|-b val path
下面,我们来试用这些命令。
首先,看看列表命令,如下:
[zk: 127.0.0.1:2181(CONNECTED) 6] ls / [zookeeper]
接下来,我们创建一个新的znode节点,这个znode节点相关的字符串为“my_data”,如下:
[zk: 127.0.0.1:2181(CONNECTED) 6] create/zk_test my_data Created /zk_test
再次执行列表命令,如下:
[zk: 127.0.0.1:2181(CONNECTED) 6] ls / [zookeeper, zk_test]
可以看到,zk_test目录已经被创建。
下面,我们使用get命令来验证此znode节点相关的数据,如下:
[zk: 127.0.0.1:2181(CONNECTED) 7] get/zk_test my_data cZxid = 0x4 ctime = Fri May 02 08:28:40 UTC 2014 mZxid = 0x4 mtime = Fri May 02 08:28:40 UTC 2014 pZxid = 0x4 cversion = 0 dataVersion = 0 aclVersion = 0 ephemeralOwner = 0x0 dataLength = 7 numChildren = 0
我们还可以使用set命令修改此znode相关的数据,如下:
[zk: 127.0.0.1:2181(CONNECTED) 8] set/zk_test junk cZxid = 0x4 ctime = Fri May 02 08:28:40 UTC 2014 mZxid = 0x5 mtime = Fri May 02 08:34:32 UTC 2014 pZxid = 0x4 cversion = 0 dataVersion = 1 aclVersion = 0 ephemeralOwner = 0x0 dataLength = 4 numChildren = 0
最后,我们可以删除此znode节点,如下:
[zk: 127.0.0.1:2181(CONNECTED) 10] delete/zk_test [zk: 127.0.0.1:2181(CONNECTED) 11] ls / [zookeeper]
退出ZooKeeper客户端连接,执行命令:
[zk: 127.0.0.1:2181(CONNECTED) 12] quit Quitting... 2014-05-02 08:49:47,415 [myid:] - INFO [main:[email protected]] - Session:0x145bbdc9b460001 closed 2014-05-02 08:49:47,415 [myid:] - INFO [main-EventThread:[email protected]]- EventThread shut down
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时间: 2024-10-26 01:28:32