还应该熟悉本系列的第一篇文章Linux上的高可用中间件，第1部分：heartbeat与ApacheWeb服务器。
You should also be familiar with the first article in this series, High-availability middleware on Linux, Part 1: Heartbeat and Apache Web server.
另外，为了获得有益的背景资料，请阅读本系列的第一篇文章，Linux上的高可用中间件，第1部分：heartbeat与ApacheWeb服务器。
Also, for helpful background, read the first article in this series, High-availability middleware on Linux, Part 1: Heartbeat and Apache Web server.
而分布计算中间件凭借其良好的可扩展性和高可用性、高性能成为实现分布计算的关键技术之一。
By right of high performance, high availability, and good scalability, distributed computing middleware becomes one of the key technologies to implement distributed computing.
而分布计算中间件凭借其良好的可扩展性和高可用性、高性能成为实现分布计算的关键技术之一。
By right of high performance, high availability, and good scalability, distributed computing middleware becomes one of the key technologies to implement distributed computing.
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