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Linux Storage and Filesystem Workshop, day 2Linux Storage and Filesystem Workshop, day 2Posted Apr 9, 2009 16:59 UTC (Thu) by MisterIO (guest, #36192)Parent article: Linux Storage and Filesystem Workshop, day 2
Aren't the two phrases "I/O requests should be submitted immediately; the block I/O subsystem shouldn't even attempt to merge adjacent requests" and "Bundling things into larger requests will tend to increase the overall bandwidth" in constrast?
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Linux Storage and Filesystem Workshop, day 2 Posted Apr 9, 2009 20:31 UTC (Thu) by jzbiciak (✭ supporter ✭, #5246) [Link]
It would seem that way. The main thing is that you don't want excessive scheduling between unrelated requests (which is what CFQ and elevator algorithms do), whereas things that are naturally large blocks you want to go as large blocks (such as a large streaming read or large streaming write).
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