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RE: [Xen-users] Re: DomU on LVM

  • To: "Wolfgang Rosenauer" <wolfgang.rosenauer@xxxxxxxxxx>
  • From: "Ross S. W. Walker" <rwalker@xxxxxxxxxxxxx>
  • Date: Thu, 8 May 2008 13:04:08 -0400
  • Cc: xen-users@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Thu, 08 May 2008 10:04:42 -0700
  • Importance: normal
  • List-id: Xen user discussion <xen-users.lists.xensource.com>
  • Priority: normal
  • Thread-index: AcixLKPIjUW3Bp5ZTjKAlepWrUKhrQAAHkFA
  • Thread-topic: [Xen-users] Re: DomU on LVM

Wolfgang Rosenauer wrote:
> Ross S. W. Walker wrote:
> >>> What would be the practical reason for that as opposed to
> >>> allocating a bigger LV to contain all partitions?
> >> For me the advantage would be that I'm able to resize the different 
> >> partitions. If I use the LV as complete disk I only could extend the 
> >> last partition in DomU.
> > 
> > You can resize within the domU if you don't overallocate up front.
> > 
> > Typically I will create a 16GB LV for a 8GB / and 2GB swap, or a
> > 32GB LV for a 16GB / and 4GB swap and always leave around 30%
> > available for future expansion or additional needs. But you
> > could always bring in another LV to the domU and add it to the
> > VG within the domU and resize from that.
> That's true but in the end that needs LVM in Dom0 _and_ LVM in DomU. 
> Somehow I think that gets complicated especially if the LVs of the guest 
> should be accessible from Dom0.

It's very rare that I personally need to touch the domU's data
without the domU, besides converting from LV to image or
vise-versa. Probably because my domUs are online all the time.


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