与并行scsi一样，SAS是一种用于在硬盘和磁带驱动器等计算机存储设备之间传输数据的技术。
Like parallel SCSI, it is a data-transfer technology designed to move data to and from computer storage devices such as hard drives and tape drives.
不过，在实际情况中，目前在Internet上与并行Web技术一起使用的事实上的格式并没有为新数据格式的扩展提供很多的灵活性，也没有提供更丰富的语义。
In practice, however, the DE facto formats used today on the Internet with parallel Web techniques do not offer much flexibility for extension to new data formats and richer semantics.
本文描述的高级并行机制、数据和分区关联以及其他技术都提供了一组重要工具，使用这些工具可以帮助简化脱机处理。
Advanced parallelism, data and partition affinity, and other techniques described in this article provide an essential set of tools that can help streamline offline processing.
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