...的文件时,将不必再对文件执行I/O操作,使得内存映射文件在处理大数据量的文件时能起到相当重要的作用。 延迟写(delayed write): 传统的UNIX实现在内核中设有缓冲区高速缓存或页面高速缓存,大多数磁盘I/O都通过缓冲进行。
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But, because XFS delayed its allocation decision, it was able to write the data in one fell swoop, improving write performance as well as reducing overall filesystem fragmentation.
但是,因为XFS延迟了它的分配决定,所以,它能够一下子写完数据,从而提高了写性能,并减少了整个文件系统的碎片。
If XFS hadn't delayed its allocation decision, it may have unknowingly written the data into multiple non-contiguous chunks, reducing write performance significantly.
如果XFS没有延迟它的分配决定,那么,它也许已经不知不觉地将数据写到了多个非相邻块中,从而显著地降低了写性能。
Project launch delayed by: 3 hours (plus a huge amount of frustration incurred by my inability to write a sales blurb for my own project!).
项目被推迟了:3小时(还有因为无法为自己写出一份营销推介而产生的大量沮丧)
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