Capacity testing is complementary to load testing and it
determines your server’s ultimate failure point, whereas load testing monitors
results at various levels of load and traffic patterns. You perform capacity testing
in conjunction with capacity planning. You use capacity planning to plan for
future growth, such as an increased user base or increased volume of data. For
example, to accommodate future loads you need to know how many additional
resources (such as CPU, RAM, disk space, or network bandwidth) are necessary
to support future usage levels. Capacity testing helps you identify a scaling
strategy to determine whether you should scale up or scale out.①

意译如下(翻译不对的，请各位指正)：
容量测试是对负载测试的一种补充，它可以检测定位服务器的最终故障点，而负载测试监控的是各种负载水平下的压力和流量状态情况。容量测试是与容量计划相关的，你需要事先计划预测未来的负载的增长需要，像增长的用户和更大量的数据等。例如为了满足未来的业务扩张，你需要要增加多少额外的资源才能满足未来的业务水平(这些资源包括：CPU、RAM、磁盘空间和网络带宽等)。容量测试可以通过实验数据帮助你去判断容量计划是否合适，并依据容量去进行计划策略的调节。

[ 本帖最后由 yang 于 2008-2-15 18:06 编辑 ]

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