您还可以通过服务器机群最多可支持的服务器数目来衡量向外扩展能力。
You can also measure scaling out by the maximum number of servers supported in the server farm.
这可能会导致出现问题，因为请求可能不会按顺序到达服务器机群中的目标机器上。
This might lead to problems, since the requests might arrive out of order to the target machines in the server farm.
在通过服务器机群增加支持应用程序的服务器后最多可支持的用户数，可以衡量应用程序的向外扩展能力。
Number of users that can be maximally supported after you add servers to support the application through a server farm, to measure the scaling out ability of the application.
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