[drbd-mc] LCMC feature request to fix clock skew in Windows guests.

[Caspar Smit]

Hi Rasto,

Thanks, was this included in 1.5.0?
Where can I find this setting?

Kind regards,
Caspar Smit

2013/3/22 Rasto Levrinc <rasto.levrinc at gmail.com>

> On Thu, Dec 13, 2012 at 2:37 PM, Caspar Smit <c.smit at truebit.nl> wrote:
> > Hi Rasto,
> >
>
> > I noticed that in Windows 7 and Windows 2008 based VM's the clock of the
> > guest falls behind the host's clock.
> > Under heavy load of the VM this can result in 4 minutes behind during a
> 15
> > minutes period, quite a lot.
> >
> > To fix this I found a combination of needed options in Libvirt:
> >
> > <clock offset='localtime'>
> >   <timer name='rtc' tickpolicy='catchup'/>
> >   <timer name='hpet' present='no'/>
> > </clock>
>
> Hi Caspar,
>
> it seams that these settings should be ok for both Windows and Linux.
> I've made "offset" configurable in the LCMC.
>
> <clock offset="utc/localtime">
>         <timer name="rtc" tickpolicy="catchup" />
>         <timer name="pit" tickpolicy="delay" />
>         <timer name="hpet" present="no" />
> </clock>
>
> If there's demand to make these timers configurable I'll gladly add it.
>
> Thanks,
> Rasto
>
> >
> > Default LCMC creates:
> > <clock offset='utc'/>
> >
> > offset=localtime is best to use for Windows guests (according to the
> > qemu-kvm manpage).
> >
> > It would be really nice if these libvirt options were configurable in
> LCMC.
> >
> > Kind regards,
> >
> > Caspar Smit
>
> --
> Dipl.-Ing. Rastislav Levrinc
> rasto.levrinc at gmail.com
> Linux Cluster Management Console
> http://lcmc.sf.net/
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