[Lustre-devel] read ahead
chas williams - CONTRACTOR
chas at cmf.nrl.navy.mil
Wed Dec 12 07:52:21 PST 2007
In message <20071211234708.GT3214 at webber.adilger.int>,Andreas Dilger writes:
>For random reads the code does understand the difference between e.g.
>reads of 16 sequential pages (64kB generally) read at non-consecutive
>offsets and 16 sequential 4kB page reads. The former will NOT start
>readahead, while the latter does.
what about direct i/o? it looks like doing direct i/o to a file
will never trigger readahead. is this intentional?
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