RE: [Xen-users] LVM's inside of Domu's

[Donny Brooks <dbrooks@xxxxxxxxxxxxxxxx>]

On Tuesday, April 13, 2010 09:35 AM CDT, Jeff Sturm <jeff.sturm@xxxxxxxxxx> 
wrote: 
 
> > -----Original Message-----
> > From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-users-
> > bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Fajar A. Nugraha
> > 
> > On Tue, Apr 13, 2010 at 4:34 AM, Donny Brooks
> <dbrooks@xxxxxxxxxxxxxxxx>
> > wrote:
> > > Back when I started messing with Xen (a year or so ago), I read
> where it was not
> > good to have a domu setup with LVM inside of it if the storage on the
> Dom0 was LVM
> > also.
> > 
> > "not good" is relative. RedHat would say its benefit outweights its
> drawbacks.
> 
> The "benefit" I can see is that the domU disk image with partitions and
> LVM remains compatible with Kickstart.  But there are other ways to
> bootstrap a Red Hat or CentOS image.
> 
> I'm seeing us move rapidly towards a model in which all our hosts are
> virtualized, but the Linux distribution we use remains encumbered by
> features designed for bare iron deployments.  I hope a new OS will
> emerge some day--one optimized for virtualization.  Eliminate the
> old-fashioned boot loader, disk partitions, block schedulers, RAID
> options, etc.  Move simple network services into dom0, or maybe stubdom.
> 
> Basic Red Hat installs now require 1GB+ disk and 256MB RAM to be usable.
> That's because the OS bundles every package it will need to run
> standalone on bare iron.  I realize disk/memory are now a cheap
> commodity but the bloat reminds me of some of the reasons I left behind
> a certain proprietary OS.
> 
> -Jeff
> 
> 
> 
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Jeff,

     The bloat is exactly why I personally prefer ubuntu over CentOS. They have 
the JeOS where you can install a functional machine in under 300MB disk and 
128MB ram. But trying to get the OMSA stuff installed for a Dell server on 
anything but a rpm based distro is near futile. So alas, I am having to deal 
with CentOS. One good thing about Xen is you can have ready made images. This 
is one thing I have found myself using more and more recently.
 
-- 
 
Donny B. 


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