[GRLUG] Xen

David Szostek dave at unlimitedventures.com
Tue Apr 8 09:53:48 EDT 2008


Thanks Al!

> -----Original Message-----
> From: grlug-bounces at grlug.org 
> [mailto:grlug-bounces at grlug.org] On Behalf Of Al Tobey
> Sent: Tuesday, April 08, 2008 1:51 AM
> To: grlug at grlug.org
> Subject: Re: [GRLUG] Xen
> 
> 
> On Fri, Apr 4, 2008 at 9:04 PM, David Szostek 
> <dave at uvhosting.com> wrote:
> > Hi,
> >
> >  Consider a server with a 4TB RAID5 volume of SATA drives 
> and a 450GB 
> > RAID 5  volume of 15k SCSI drives.
> >
> >  When creating a guest domain in Xen, we specify the main 
> storage for 
> > it on  the 4TB volume when we create it.
> >
> >  We would also like to allow this guest domain some storage on the 
> > 450GB  volume.
> >
> >  How would this be accomplished? Anyone have any ideas? 
> Google hasn't 
> > been  very helpful (though my search terms could suck too).
> 
> Sorry for the late post.   I don't follow the list very closely these
> days, since I live in San Diego now ;)
> 
> I'm doing a big Xen rollout right now and for your situation, I'd
> highly recommend LVM backed storage.    Put one volume group on the
> 4TB volume, and another on the 450GB volume.    Don't use the terrible
> naming convention Fedora has by default - call them something 
> useful like vgxen00.
> 
> So if your 4TB drive is one LUN on /dev/sda, create one big 
> partition with type "Linux LVM" (8e) then: pvcreate /dev/sda1 
> vgcreate vgxen00 /dev/sda1
> 
> Then you can lvcreate your VM's and do all kinds of neat stuff.
> There are plenty of LVM howto's on the 'net.    virt-install also
> supports LVM volumes and they're typically a bit faster than 
> file-backed VM's.
> 
> lvcreate -n ${vm_hostname}-disk0 -L 20G vgxen00
> 
> Good luck!
> -Al Tobey
> 
> >
> >  Thanks much!
> >  ~dave
> >
> >
> >  ------------------
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------------------
Unlimited Ventures, 820 Monroe Ave NW - Suite 323, Grand Rapids, MI 49503. 
Phone: (616) 723-0098. Fax: (616) 723-0099. Website: www.unlimitedventures.com

LEGAL NOTICE:  This e-mail is for the exclusive use of the intended recipient(s). If you are not an intended recipient, please notify the sender by reply e-mail or by calling (616) 723-0098 x 1002, delete the e-mail from your computer and do not copy or disclose it to anyone else. Unauthorized disclosure, copying, distribution, reliance or use is prohibited. Neither this e-mail nor its attachment(s) constitute an electronic signature or provide consent to contract electronically, unless expressly so stated by an Unlimited Ventures Officer in the body of this e-mail or an attachment.



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