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文件名称: MySQL 1Z0-883题库DEMO
  所属分类: MySQL
  开发工具:
  文件大小: 390kb
  下载次数: 0
  上传时间: 2018-01-24
  提 供 者: lion*****
 详细说明: Adding redundancy to your system can take two forms: adding spare capacity and duplicating components. It’s actually quite easy to add spare capacity—you can use any of the techniques we’ve mentioned throughout this chapter. One way to increase availability is to create a cluster or pool of servers and add a load-balancing solution. If one server fails, the other servers take over its load. It is generally a good idea to underutilize your components if you can, because it gives you much more “headroom” to handle performance prob lems caused either by increased load or by component failures. For many purposes, you will need to duplicate components and have a standby ready to take over if the main component fails. A duplicated component can be a simple as a spare network card, router, or hard drive—whatever you think is most likely to fail. Duplicating entire MySQL servers is a little harder, because a server is useless without its data. That means you must ensure that your standby servers have access to the primary server’s data. The following sections discuss some ways you can accomplish this. ...展开收缩
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