Re: [vserver] tickless and raid over ethernet

From: Chuck <chuck_at_sbbsnet.net>
Date: Tue 19 Feb 2008 - 16:20:26 GMT
Message-Id: <200802191120.26579.chuck@sbbsnet.net>

On Tuesday 19 February 2008, Michael S. Zick wrote:
> On Tue February 19 2008 10:00, Chuck wrote:
> > On Tuesday 12 February 2008, Steve Dommett wrote:
> > > On Tuesday 12 February 2008, Chuck wrote:
> > > > has anyone messed with the new kernel tickless option? does it
affect/help
> > > > vserver performance?
> > > I've not seen any adverse effects yet on my desktop vserver system.
> > >
> >
> > has it improved performance any?
> >
>
> Using 2.6.24 on 2 processor machine (tickless - preemptable) does seem to
improve
> the performance. But it also certainly screws ntpd!
>

we are using dual core opterons so it would have 4 cores to work with, but the
ntpd thing is not nice... i rely on ntpd heavily plus one of the servers is
also a pool member. i messed with tickless here in my office a bit, and my
server is a dual p3 and tickless is working flawlessly on it, has increased
efficiency and lowered cpu temps noticably... however on my intel q6600 quad
core, tickless makes the machine fall apart with severely decreased
performance and severe pausing! so i wonder how well it works yet with 64bit.
i suspect it may be too new to attempt to use in production on any flavor of
x86_64 just yet.

> Haven't tried 2.6.24.2 yet - still waiting for a 2.6.24.x vserver patch
announcement
> rather than the 2.6.24-rc patch that is posted.
>
> Mike
> >
> >
> > > > also, has anyone experience with doing a raid1 or some type of
partition
> > > > mirroring between machines via private ethernet?
> > > http://www.drbd.org/ seems to be what you want.
> > >
> > > Cheers,
> > > Steve.
> > >
> >
> >
> >
>

-- 
Chuck
Received on Tue Feb 19 16:27:49 2008
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