zookeeper cluster

There was an article in detail about how to install Hadoop+hbase+zookeeper The title of the article is: Hadoop+hbase+zookeeper distributed cluster construction perfect operation Its website: http://blog.csdn.net/shatelang/article/details/7605939 This article is about hadoop1.0.0+hbase0.92.1+zookeeper3.3.4. The installation file versions are as follows: Please

export classpath=.: $JAVA _home/lib/tools.jar:$ Java_home/lib/dt.jar: $CLASSPATH(4) Source/etc/profile Verification: java-version Installing Hadoop Execute command (1) tar-zxvf hadoop-1.1.2.tar.gz (2) MV hadoop-1.1.2 Hadoop (3) vi/etc/profile Add the following: Export JAVA_HOME=/USR/LOCAL/JDK export hadoop_home=/usr/local/hadoop export path=.: $HADOOP _home/bin: $JAVA _home/bin: $PATH(4) Source/etc/profile (5) Modify the configuration file in the Conf directory 1.hadoop-env.sh export Java_home=

1. PrefaceThe previous chapter describes the transformation of the existing system architecture, and this chapter describes the detailed design description of the transformation.2.Zookeeper directory structure designZookeeper directory structure diagram:1. As shown in the figure above, zookeeper's directory structure is divided into multiple layers,/zookeeper as the root directory,/

1.ZK Cluster Java Simple Operation 1.0 Package directory structure lib taken from Zookpeeper official compression package (based on zk3.4.5 test pass)1.1 Abstractzookeeper.javaPackage Com.ccy.zk;import Java.io.ioexception;import Java.util.concurrent.countdownlatch;import Org.apache.log4j.logger;import Org.apache.zookeeper.watchedevent;import Org.apache.zookeeper.watcher;import Org.apache.zookeeper.watcher.event.keeperstate;import org.apache.zookeeper.

Tags: zopper shellZooper Cluster Structure:Host name roleNode1 FollowerNode2 leaderNode3 FollowerMaster ObserverScript content:#!/bin/bashfunction GetStatus () {#定义一个函数EXEC 9#打开host的port a read-write socket connection that is connected to the file descriptor 9Echo Stat >9#将 "Stat" sent to the socket connectionmode=$ (Cat ")#从socket返回数据中提取Mode的值 and assign a value to modeEXEC 9Echo ${mode:-null}#输出MODE *}For i in node{1..3} nn01;doEcho-ne "${i}\t"

in this example, the master node has the host name of Master, and the hostname of the slave node is slave1,slave2,slave3, the user name is Hadoop, and the zookeeper version used is zookeeper3.4.5. Run the following script under ROOT to achieve a quick build of the zookeeper cluster. Before the installation to ensure that the host can communicate with each other,

The previous article explains how to install the python client of zookeeper. Next, I found an example on the Internet. The application environment is as follows: 1. When two or more services run and only one service accepts requests (work) for the agreed time, other services are on standby. 2. When the service receiving the request (work) Fails abnormally, a service is selected from the remaining standby service to accept the request (work ). In the

1.zookeeperZookeeper can be used to ensure data transaction consistency between the data in the zookeeper cluster2. Start the cluster and checkStart on each machine separately./zkserver.sh StartCheck Status./zkserver.sh Status3. Client starts shell command linezkcli.sh4.shell command: Enter Help to get a list of all commandsMy personal website: http://www.caicongyang.com;My csdn blog address: Http://blog.cs

1. Heartbeat detection, store supervisor and worker heartbeat (including their status), so that Nimbus can monitor the status of the entire cluster, thus restarting some of the dead worker; 2. Submit a Task 3. Store all state information for the entire cluster for the UI display 4. Storm's storage structure on ZK /-{storm-zk-root}--The root directory of storm on zoo