RE: [Xen-users] High availability and live migration with just LVMand hardware fencing

[Jeff Sturm <jeff.sturm@xxxxxxxxxx>]

> -----Original Message-----
> From: Bart Coninckx [mailto:bart.coninckx@xxxxxxxxxx]
> Sent: Wednesday, May 19, 2010 5:53 PM
> To: John Madden
> Cc: Javier Guerra Giraldez; Jeff Sturm; xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-users] High availability and live migration with just 
> LVMand hardware
> fencing
> 
> Well, for (HVM) Windows guests I see it as a necessity basically: next to
> backups of regular data, snapshotting will allow to take fast complete backups
> of a temprarely suspended OS.

This may not be any help to you (yet), but I've read that blktap2 in Xen 4.0 
can also create snapshots.

I agree snapshots are very useful, although not a substitute for conventional 
backups.  Among other places, we use them on GFS filesystems--we run gfs_tool 
to freeze the filesystem, create a snapshot on our SAN, then unfreeze.  These 
provide a nice recovery point if disaster strikes.

-Jeff

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