[OpenAFS] Re: odd problem with RW site after a botched replica

Andrew Deason adeason@sinenomine.net
Wed, 31 Oct 2012 14:07:35 -0500

On Wed, 31 Oct 2012 10:43:02 -0700
Timothy Balcer <timothy@telmate.com> wrote:

> I have been considering running VMs to spread out fs operations on a
> machine with many cores. On a 12 core machine, for example, I would
> make something like 4 fileservers each with 3 cores, and the
> underlying OS would be doing nothing except servicing those VMs. Do
> you think this would allow for better performance?

That depends on what performance you are talking about, but for other
reasons I would guess 'yes'. OpenAFS fileservers have been found to
actually perform worse if you add too many cores (I think it was over 2
or 3; or at least you get very little benefit after that point, and
things get worse futher on). Hopefully that will get better, but for
now, yes, some people have addressed this by running fileservers in VMs,
zones, chroots, etc and allocating specific cores to fileserver

Andrew Deason