AW: [Xen-users] Deploying redhat clusters under Xen 3.0.2

[<thomas.vonsteiger@xxxxxxxxxx>]

>   - can this change affects to all disks in the guest, included node
> disk??

Yes, it has affects to all for xen guest defined disks.
Maybe in future we can define storage for xen guests nonshared by default or
shared. This is only if you setup cluster with shared disk on one xen host.

>   - How can I setup virtual storage in config file, as a normal disk
> without any param??

I don't now your question.
Have a look here:
http://www.cl.cam.ac.uk/Research/SRG/netos/xen/readmes/user/user.html#SECTIO
N03300000000000000000

This is my storage config node1 for rhcs with gfs to play and learn about
this. All is done by lvm:

disk = [ 'phy:/dev/xenvg/xenRHEL4_3,ioemu:hda,w',
'phy:/dev/xenvg/xenCLU1fs1,ioemu:hdb,w',
'phy:/dev/xenvg/xenCLU1fs2,ioemu:hdc,w' ]

>   - If I use GFS and two nodes writing at same time, can this virtual
> storage be corrupted??

No, gfs is developed for such scenarios.
http://www.redhat.com/docs/manuals/csgfs/


Thomas

> -----Ursprüngliche Nachricht-----
> Von: xen-users-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-users-
> bounces@xxxxxxxxxxxxxxxxxxx] Im Auftrag von carlopmart
> Gesendet: Montag, 21. August 2006 09:24
> Cc: xen-users@xxxxxxxxxxxxxxxxxxx
> Betreff: Re: [Xen-users] Deploying redhat clusters under Xen 3.0.2
> 
> Tim, more information:
> 
>   - I wneed to use GFS filesystem for this virtual storage.
>   - I do not use heartbeat, I have to deploy this configuration with
> RedHat Cluster Suite.
>   - Only one network interface per node using 100Mb private netowrk.
> 
> Thomas,
> 
>   About this:
> 
>   If you change in /etc/xen/scripts/block Line 105 and 116 from
>        echo ?local?
> to:
>        echo ?ok?.
> 
> I have some questions:
> 
>   - can this change affects to all disks in the guest, included node
> disk??
>   - How can I setup virtual storage in config file, as a normal disk
> without any param??
>   - If I use GFS and two nodes writing at same time, can this virtual
> storage be corrupted??
> 
> Many thanks
> 
> 
> 
> Tim Post wrote:
> > On Fri, 2006-08-18 at 22:42 +0200, carlopmart wrote:
> >> Hi all,
> >>
> >>   I need to deploy different RedHat servers with Cluster Suite under
> Xen
> >> (using Intel VT hardware for hosts). To accomplish this, I need to
> setup
> >> a virtual shared storage disk to serve for several nodes. Can Xen 3.0.2
> >> support disk locking feature to deploy clusters (Load balancing and HA
> >> configs) as vmware products support? Is this feature supported by xen?
> >> And my last question: can I use virtual scsi disk to use as a shared
> >> storage?
> >>
> >> Many thanks.
> >>
> >>
> >
> > Some more information about your cluster would be helpful :) How many
> > nics per node, and is one of those nics talking to a private gig-e
> > network?
> >
> > We use xen to help manage or completely contain everything from open SSI
> > to our own pound / lighty / drbd / heartbeat based concoctions and quite
> > frankly I can't see doing without Xen in the future when it comes to
> > both ha / load balanced and hpc clusters.
> >
> > Have you looked at gfs?
> >
> > Cheers
> > -Tim
> >
> >
> >
> 
> --
> CL Martinez
> carlopmart {at} gmail {d0t} com
> 
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