Additional query and data transfer time was required.
需要更多的查询和数据传输时间。
Data transfer times are typically fractions of a millisecond, so rotational latency and seek time are the primary sources of disk latency on a physical HDD.
数据传输时间一般几毫秒,所以旋转延迟时间和寻道时间是一个物理hdd的主要磁盘延迟时间来源。
Latency: the time between initiating a request for data and the beginning of the actual data transfer.
延时:初始化一个对数据的请求到数据真正开始传输的时间。
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