其中一些是开放源码的，一些是商业产品，但是可以免费下载和使用，其他平台需要购买商业许可证。
Some are open source, some are commercial products but free to download and use, and others require a commercial license.
显然，对于您的博客和内容管理系统需要的任何特性，都有适合的开放源码工具；您只需要做一些定制工作。
It is also evident that whatever your blogging and content management needs be, there is a solid open source tool already available for it; you might have to customize it a little bit though.
幸运的是，有一些优秀的开放源码软件资源可以帮助我们设置和管理健壮的产品集群。
Fortunately, excellent open source resources can help you set up and manage robust production clusters.
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