冗余服务器不一定是在同一地理位置上。
Redundant servers are not necessarily located in the same geography.
冗余服务器必须在生产环境中通过必需的应用程序服务器容量。
Redundant servers must be sized according to the required application server capacity in the production environment.
您应该在需要的地方添加冗余服务器，它们在主服务器失败时接管其工作。
You should add redundant servers where possible, which will take over in the event of the primary server failing.
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