Heartbeat-Message hist queue is filling up
If you see some lines in the ha-log file telling you that the message queue is filling up then it's likely the two nodes can't communicate with each other. Check that you opened UDP port 694 on the...
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Running Hadoop On Ubuntu Linux (Single-Node Cluster)
In this tutorial, I will describe how to setup a single-node Hadoop cluster.Table of Contents:What we want to doPrerequisitesSun Java 6Adding a dedicated Hadoop system userConfiguring SSHDisabling...
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Running Hadoop On Ubuntu Linux (Multi-Node Cluster)
In this tutorial, I will describe how to setup a multi-node Hadoop cluster.Table of Contents:What we want to doTutorial approach and structurePrerequisitesConfiguring single-node clusters firstDone?...
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RHCS(Red Hat Cluster Suite) I/O fencing using SNMP IFMIB
RHCS is comparable to HP MC/Service Guard, IBM HACMP, SUN Cluster etc. The free open source version is available in Centos/Fedora Fencing is the act of isolating a cluster node from its storage when...
View ArticleRHCS(Red Hat Cluster Suite) quorum disk
The last post "RHCS I/O fencing" is about dealing with split-brain situation, in which cluster members lost heartbeat communication and each believe it is legitimate to write data to the shared...
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Cluster How to CentOS / RedHat 6.x
Step # 1: Mount an ISO file.# mkdir -p /media/centos# mount -o loop /dev/centos6X.iso /media/centosStep # 2: Create repo config file on both the node.# vi...
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CentOS: Configure Piranha as Load Balancer (Direct Routing Method)
I am currently working on a web cluster project using CentOS. In this project, I have 2 web servers running on Apache and mounted the same document root to serve the HTTP content. I also have 2 servers...
View Articlehadoop单机版安装方法
hadoop单机版安装方法:1、安装JDK （1）下载安装JDK：确保计算机联网之后命令行输入下面命令安装JDK sudo apt-get install sun-java6-jdk （2）配置计算机Java环境：打开/etc/profile，在文件最后输入下面内容 export JAVA_HOME = （Java安装目录） export CLASSPATH...
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