Re: [Xen-devel] Automation scripts

[Paul Dorman <pauld@xxxxxxxxx>]

I like this suggestion. Instead of having a bunch of templates only, I could 
also have standby partitions, ready to start immediately. Storage *is* cheap, 
so the cost is low for this.

Paul

On Wednesday 29 September 2004 10:36 pm, Christian Limpach wrote:
> On Tue, Sep 28, 2004 at 09:21:12AM -0500, Brian Wolfe wrote:
> > I'm far from having a working automated system right now. I still have
> > the iSCSI death issues to deal with when combining 2 iSCSI target
> > devices into a raid-1 array in Domain-0 to be exported to the XenLinux
> > unprived domain. 8-( NFS roots still periodically "lock up" momentarilly
> > (~2 to 10 seconds) when using nfs root. SO the solution isn't ready yet.
> > I do highly reccomend that people use LVM LVs for individual exportable
> > block devices and to forget about using COWs to "save space". Adding a
> > 200GB disk is dirt cheap (unless you are talking about scsi) so it's not
> > worth the savings IMHO to multi-cow a filesystem into 2+ unprived
> > domains on a single machine. The 1 to 2 GB of saved space just isn't
> > worth it at $0.10 per GB of disk space. :) Add in the system overhead
> > and seek times required for COWs after your first FS upgrade and your
> > return is worse than using separate partitions/LVs in my experience.
>
> I think the best use one could get from LVM snapshots is background
> cloning of filesystems, i.e. you'd use a modified snapshot driver
> which would slowly create a 1-to-1 copy of the whole partition but
> allow it to be used immediately, copying being done when the
> disk/machine is otherwise idle.
>
>     christian


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