You might set variables to one collection of values for one kind of machine and set the values to another collection for a system of an alternate flavor.
您可以将这些变量设置为不同的值集合，一个集合针对一种机器，而另一个集合针对另一种风格的系统。
2
If there is a failure, the database server can move from onemachine to a backup system.
如果出现故障，数据库服务器可以从一台机器转移到一个备份系统。
3
Cluster instances can be created with one or more instances on each machine managed by a single operating system image.