Re: wrong percent with vsync+randrw

From: Zhang, Yanmin <>
Date: Mon, 07 Apr 2008 16:16:32 +0800

On Mon, 2008-04-07 at 10:04 +0200, Jens Axboe wrote:
> On Mon, Apr 07 2008, Zhang, Yanmin wrote:
> > Jens,
> >
> > I ran a testing with vsync+randrw. I expected the both read and write's precent are
> > 50%. But vmstat showed write was more than 99%.
> The problem here is that the window service is too small, because of
> your big queue depth. I modified the fio algorithm to only look into ios
> issued, I think that is the fair metric. With that, you should have a
> nice distribution between reads and writes - can you pull the update and
> see that it works for you?
It's hard to pull in company as IT configures firewall to filter most git
access. Would you like to send me a patch against the lastest tarball? Or just
upload the latest tarball on the snapshot website?
Received on Mon Apr 07 2008 - 10:16:32 CEST

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