MapReduce has been discussed at length at InfoQ, and is a programming model originally introduced by engineers at Google as a scalable approach to processing large data-sets.
InfoQ已经详细介绍了MapReduce，它最初是由Google工程师引入的一种编程模型，旨在提供一种可伸缩的方法来处理大数据集。
The request-processing time and the queue length are proper measures for the system administrator to monitor in order to make decisions about adding servers or shutting down superfluous servers.
请求处理时间和队列长度是一个很好的度量指标，系统管理员通过监控它们来决定是增加服务器，还是关掉多余的服务器。
The server has to respond to the request and figure out a response to populate the content-length response header, so you don't save any processing time.
服务器必须对请求进行响应，并构造一个响应来填充内容长度的响应头，因此并不能节省任何处理时间。
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