Re: cifs large write performance improvements to Samba

From: Marcelo Tosatti
Date: Thu Dec 16 2004 - 14:29:25 EST

On Thu, Dec 16, 2004 at 10:58:07AM -0800, Hans Reiser wrote:
> Marcelo Tosatti wrote:
> >
> >>I have not seen anyone
> >>doing that on Linux in an automated fashion (e.g running iozone
> >>automated every time a new 2.6.x.rc on a half a dozen of the fs - simply
> >>to verify that things had not gotten drastically worse on a particular
> >>fs due to a bug or sideffect of a global VFS change).
> >>
> >>
> >
> >Yes, we definately need that.
> >
> >
> >
> Andrew Morton is saying that iozone does things real apps don't do, that
> is, it dirties mmap'd pages enough to swamp the machine.
> Do you guys agree or disagree with that?
> Reiser4 needs iozone optimization work which we haven't bothered with yet.

I'm not really familiar with iozone's behaviour, sorry.

Steve, Andrew?

PS: Yep, another important part (to me at least) of all this automated performance
testing effort is a detailed understanding of the tests being performed.
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