On Tue, 2002-07-16 at 12:31, Joe Thornber wrote:
> > Joe, are you absolutely sure these tests had the disk cache disabled? That's
> > the only hardware thing I can think of that would make a difference.
>
> Absolutely sure. Those figures were for a pair of PVs that were
> sharing an IDE cable so I can certainly get things moving faster.
Some IDE drives ignore commands to turn off the write back cache, or
turn it back on when load gets high.
Try iozone -s 50M -i 0 -o with writeback on and off. If you get the
same answer the benchmarks are suspect....
-chris
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This archive was generated by hypermail 2b29 : Tue Jul 23 2002 - 22:00:20 EST