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Well Pasi and others...
I do not know whats happen... I follow each instruction contents on this mail and other ones and remus crash again!
However, I already compile Xen 3.3 testing with Kemari patch and Kemari show more stable that Remus....
Maybe I am wrong with this option, but I will remain with Kemari :)
Thanks
Em Qui 21 Jan 2010, às 08:57:37, Gilberto Nunes escreveu:
> Em Quinta-feira 21 Janeiro 2010, às 08:43:27, Pasi Kärkkäinen escreveu:
> > On Thu, Jan 21, 2010 at 08:40:35AM -0200, Gilberto Nunes wrote:
> > > Em Quinta-feira 21 Janeiro 2010, às 08:16:55, você escreveu:
> > >
> > > Hi Pasi
> > >
> > > > On Thu, Jan 21, 2010 at 08:12:21AM -0200, Gilberto Nunes wrote:
> > > > > Em Quarta-feira 20 Janeiro 2010, às 22:20:17, Brendan Cully
> > > > > escreveu:
> > > > >
> > > > > Hi Brendan...
> > > > >
> > > > > > On Thursday, 14 January 2010 at 09:52, gilberto nunes wrote:
> > > > > > > I installed the Remus but had some problems.
> > > > > > > He leaves the VM very slow. I'm using a partition with DRBD /
> > > > > > > LVM. May even be that you say that has many layers (DRBD / LVM)
> > > > > > > that can influence on performance.
> > > > > > > But the interesting thing is that when Remus is not running the
> > > > > > > VM is light even with 512M of memory. And look what I'm talking
> > > > > > > about a Windows 2003 Standard Edition.
> > > > > > > The Remus to stop working inexplicably (at least for me)
> > > > > > > and let the VM's started in a state of the two nodes ...
> > > > > >
> > > > > > It's taken me a while to get Xen unstable running again, but now
> > > > > > that I have I can't reproduce any of these problems with an XP
> > > > > > guest. It remains responsive while Remus is running, and doesn't
> > > > > > fail over unless I kill it.
> > > > >
> > > > > Right
> > > > >
> > > > > > Disk access isn't likely to make a huge performance difference
> > > > > > (although I should say, simply parking a Remus VM on top of DRBD
> > > > > > is not safe, since there is no way of rolling back changes that
> > > > > > have been written since the most recent checkpoint).
> > > > >
> > > > > What you suggest... NFS!
> > > > >
> > > > > > It sounds like your network
> > > > > > link between the primary and backup is either low capacity or
> > > > > > flaky in some way, or you have a loaded dom0.
> > > > >
> > > > > My network between primary and backup server is a dedicate network,
> > > > > make with a dedicate fast ethernet switch...
> > > >
> > > > Not sure if Fast Ethernet is enough for Remus syncing?
> > >
> > > Well, I try too with crossover network cable, in Giga Ethernet, but I
> > > have the same...
> > >
> > > > > I do not understand wath you say about that "I have a loaded dom0".
> > > > > On fact, Xen always have a loaded dom0, right!
> > > >
> > > > I bet he meant "do you have high load on dom0", aka do you have high
> > > > cpu usage in dom0? Try running "xm top" to figure out. And also
> > > > normal "top" in dom0.
> > >
> > > Ok... I run xm top and get this:
> > >
> > > NAME
> > > Domain-0
> > >
> > > STATE
> > > -----r
> > >
> > > CPU(sec)
> > > 135
> > >
> > >
> > > CPU(%)
> > > 0.6
> >
> > So it's not using much CPU.
>
> right... indeed I have just one VM running right now... My server has 8G
> amount of memory and it is a Intel Xeon E3113 3.00 GHZ
>
> > > MEM(k)
> > > 7226368
> > >
> > > MEM(%)
> > > 86.2
> >
> > Did you configure dom0_mem= for Xen?
>
> Yes! It's dangerous or not!!
>
> > See:
> > http://wiki.xensource.com/xenwiki/XenBestPractices
> >
> > Or is there something in dom0 using all the memory for real?
>
> no... all clean... :)
>
> > Run "top" in dom0, and sort by memory usage by pressing shift+m.
> >
> > > MAXME(k)
> > > no limit
> > >
> > > MAXMEM(%)
> > > n/a
> > >
> > > VCPUS
> > > 2
> > >
> > > Something wrong!!!
> > >
> > > >>> I'd recommend using single-processor dom0 and guest to start with,
> > > >>> and
> > > >>>
> > > > > > pinning the VCPUs to their own separate physical cores.
> > > > >
> > > > > I see. But how I do this!! I am a newbie. If you can point some
> > > > > ways to me, I'll appreciate...
> > > >
> > > > See:
> > > > http://wiki.xensource.com/xenwiki/XenCommonProblems
> > > >
> > > > There's a chapter called "How can I limit the number of vcpus my dom0
> > > > has?" and "Can I dedicate a cpu core (or cores) only for dom0?"
> > >
> > > I see... However, this procedure do not take alway the beneficity of
> > > multi- core processors to my VM's!!!!
> >
> > You can still use multiple cores on your VMs.
> >
> > If you don't want to dedicate a core only for dom0, at least configure
> > the domain weights so that dom0 is guaranteed to get enough CPU time.
>
> So, in theoretical way, Remus would running properly with this adjust
> right! (sorry, I using now KDE 4 on opensuse, and I cannot yet configure
> my keyboard proerly, so the dor question go always from my
> board...rsrsrsr...)
>
> Thanks for all....
>
> > -- Pasi
> >
> >
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-devel
>
--
Gilberto Nunes Ferreira
Selbetti Gestão de Documentos
Suporte TI
Telefone: +55 (47) 3441-6004
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