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什么是高可用性？很多公司的服务都是24小时*365天不间断的。比如Call Center。这就要求高可用性。再比如购物网站，必须随时都可以交易。那么当购物网的server挂了一个的时候，不能对业务产生任何影响。这就是高可用性。高可用性2个问题：如何共享数据或同步数据？如何处理failover？解释failover，意思就是当服务器down掉，或者出现错误的时候，可以自动的切换到其他待命的服务器，不
CentOS下MySQL 5.7编译安装文章目录安装依赖包下载相应源码包添加mysql用户预编译编译安装启动脚本，设置开机自启动/etc/my.cnf，仅供参考初始化数据库设置数据库密码MySQL 5.7 GA版本的发布，也就是说从现在开始5.7已经可以在生产环境中使用，有任何问题官方都将立刻修复。MySQL 5.7主要特性：更好的性能：对于多核CPU、固态硬盘、锁有着更好的优化，每秒100W Q
Well, on the internet you will find a number of good and better ways to install WordPress on Linux, but this installation guide is prepared for my future reference as well as for those beginners who a
如果没有安装iptables可以直接用yum安装yum install -t iptables检查iptables服务的状态，service iptables status如果出现“iptables: Firewall is not running”,说明没有启动或没有规则启动iptables服务service iptables
DNS Server Installation Step by Step Using CentOS 6.5DNS, Domain Name System, translates hostnames or URLs into IP addresses. For example if we type www.unixmen.com in browser, the DNS
The following simple guide help you to setup the VNC server on RHEL 7/CentOS 7 machines, VNC help to share the desktop with the other machines which has a client installed. VNC server and cl
The following MySQL Commands were originally split into several smaller blog posts that I had built up over the years, I have now consolidated the articles into a single post (feel free to link to thi
一：卸载旧版本使用下面的命令检查是否安装有MySQL Serverrpm -qa | grep mysql有的话通过下面的命令来卸载掉rpm -e mysql //普通删除模式 rpm -e --nodeps mysql //&n
This tutorial will walk you through the process of installing the latest version of Odoo on CentOS 6. It is intended for those who might not be experienced Linux administrators but who want to run t
How To Install nginx on CentOS 6 with yum nginx is a high performance web server software. It is a much more flexible and lightweight program than apache.Set UpThe steps in this tutorial re
Install Redmine on Centos 6.5 - 64 bitInstall Redmine on Centos 6.5 - 64 bitThe System RequirementsUpdate the SystemInstall the dependencies packagesInstall Apache and MySQLTurn of
Apache Hadoop 2.4.0 significant improvements over the previous stable releases. This version has many improvements in HDFS and MapReduce. This how to guide will help you to install Hadoop 2.4.0 o
linux 中安装数据库完成后设置为随系统的一起启动 1.oracle实例安装完成后创建文件/etc/oratab 编辑restart 标识为'Y' PRIMARY:/u01/app/oracle/product/11.2.0.4/db_1:Y &n
通过对Hadoop分布式计算平台最核心的分布式文件系统HDFS、MapReduce处理过程，以及数据仓库工具Hive和分布式数据库Hbase的介绍，基本涵盖了Hadoop分布式平台的所有技术核心。通过这一阶段的调研总结，从内部机理的角度详细分析，HDFS、MapReduce、Hbase、Hive是如何运行，以及基于Hadoop数据仓库的构建和分布式数据库内部具体实现。如有不足，后续及时修改。HDF
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