集群是由很多台计算机通过互联方式组成的计算架构。它保持了单机系统服务名称一致性的特点。如果从外看集群,一个集群就像是一台计算机,如果一台机器出现问题,另外的设备就能够自动接管“故障设备”的工作,因此,集群系统具备更高的系统性能和可用性。所谓可用性是系统正常运行时间占系统总运行时间的百分比,通常所说的系统可用性主要指系统的资源、服务和应用作为一个整体为用户提供正常服务的能力,而 Cluster is composed of many computers through the interconnection of computing architecture. It maintains the consistency of standalone system service names. If you look at the cluster from the outside, a cluster is like a computer. If one machine fails, another can take over the “failed device” automatically. As a result, the cluster system has higher system performance and availability. The so-called availability is the system uptime as a percentage of the total system run time, commonly referred to as the system availability refers to the system resources, services and applications as a whole to provide users with the ability to normal service, and