集群涉及到了为一个或者多个程序或者虚拟机系统，将一组的物理系统合并为单独的主机环境。
Clustering involves combining a group of physical systems into a single hosting environment for one or more applications or virtual systems.
BPEL 客户机还会显示从合并的生产流程收到的响应。
The BPEL client will also display the response received from the merged production workflow.
VMware ESX服务器允许在一台服务器上以虚拟机的形式运行多个类似的或完全不同的操作系统实例，因此合并应用程序的工作负荷就简单而迅速。
The VMware ESX server allows several instances of similar or dissimilar operating systems to run as virtual machines on a single server, so consolidating application workloads is simple and fast.
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