在使用高性能事务策略的情况下，事务的持续时间以秒(而不是分钟)来计算。
In the case of the High Performance transaction strategy, the duration of the transaction is measured in seconds, not minutes.
计算这两个日期之间的差(以分钟为单位)，然后使用您所输入的单词数(由中间的命令输出)除以这个值，以得到平均每分钟输入的单词数。
Take the difference in minutes between the two dates and divide by the number of words you typed (which is output by the middle command) to get the average number of words per minute you type.
这种处理权衡了集群计算资源以实现更快的服务器响应；linked in大约需要90分钟时间在45个结点集群上构建900gb的数据。
This process trades off cluster computing resources for faster server responses; it takes LinkedIn about 90 minutes to build a 900 GB data store on a 45 node development cluster.
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