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This article introduces the relevant knowledge of "introduction to the specific usage of ZooKeeper". Many people will encounter such a dilemma in the operation of actual cases, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Once ZooKeeper is installed, you can use telnet to test whether it is running or not.

Telnet 127.0.0.1 2100Trying 127.0.0.1...Connected to 127.0.0.1.Escape character is'^] '.statZookeeper version: 3.4.6-1569965, built on 02 Unip 2014 09:09 GMTClients: / 127.0.0.1 GMTClients 34656 [0] (queued=0,recved=1,sent=0) / 127.0.0.1 GMTClients 34531 [1] (queued=0,recved=57,sent=57) Latency min/avg/max: 0/2/73Received: 59Sent: 58Connections: 2Outstanding: 0Zxid: 0x3Mode: standaloneNode count: 5

Stand-alone standalone mode is used here.

You can also use the client script to connect to the server

Bash zkCli.sh-server 127.0.0.1purl 2100

Once connected, you can use ZooKeeper as if you were using a NOSQL (memcached,redis) database.

Set-get value

First create a ZooKeeper node using the create command

Create / titus 18189597900

The ls / command can see which nodes there are.

[zk: 127.0.0.1 zk-book 2100 (CONNECTED) 3] ls / [zk-book, zookeeper, titus]

The get path command can view the data of a specified node

[zk: 127.0.0.1 get 2100 (CONNECTED) 4] get / titus18189597900cZxid = 0x6ctime = Mon Oct 12 21:44:14 CST 2015mZxid = 0x6mtime = Mon Oct 12 21:44:14 CST 2015pZxid = 0x6cversion = 0dataVersion = 0aclVersion = 0ephemeralOwner = 0x0dataLength = 11numChildren = 0

The first line is the data of the titus node 18189597900.

The set path data command can change the data of a specified node

[zk: 127.0.0.1 CONNECTED] set / titus 1571111cZxid = 0x6ctime = Mon Oct 12 21:44:14 CST 2015mZxid = 0x7mtime = Mon Oct 12 21:47:06 CST 2015pZxid = 0x6cversion = 0dataVersion = 1aclVersion = 0ephemeralOwner = 0x0dataLength = 7numChildren = 0

The version of dataVersion has changed from 0 to 1.

This is the end of the introduction to the specific usage of ZooKeeper. Thank you for your reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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