Messages in this thread | | | Date | Tue, 16 Jul 2002 17:31:57 +0100 | Subject | Re: [linux-lvm] Re: [Announce] device-mapper beta3 (fast snapshots) | From | Joe Thornber <> |
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Andrew,
On Tue, Jul 16, 2002 at 11:05:49AM -0500, Andrew Theurer wrote: > at 32k all the time? That would explain why these results are flat, while I > am getting a wider range.
I think this is a red herring, the chunk size code did accidentally get backed out of CVS for a while. But variable chunk sizes were certainly going into the kernel when we did the development.
> 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.
> It seems we can go 'round and 'round to no end, as long as we have HW > differences, so I have asked for use on a OSDL system we can both run on. > This way there is no difference in our HW. I'll let you know when I hear > back from them, so we can both test on the same system (if you want to).
Excellent idea, we should probably think up some better benchmarks too.
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