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Re: [Xen-users] Backup running Windows machines - redundancy

To: James Harper <james.harper@xxxxxxxxxxxxxxxx>
Subject: Re: [Xen-users] Backup running Windows machines - redundancy
From: Paul Piscuc <paul.piscuc@xxxxxxxxxx>
Date: Fri, 11 Feb 2011 01:01:33 +0200
Cc: xen-users@xxxxxxxxxxxxxxxxxxx, Mike Sun <msun@xxxxxxxxxx>, Bart Coninckx <bart.coninckx@xxxxxxxxxx>, Guido Hecken <guido.hecken@xxxxxxxxxxxxx>
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I'll be testing the method also, for different Windows versions, with and without memory state backed up. One more question thought ... what are the performance and latency aspects of doing a xm save on a Windows machine? Does is save only the memory state, or other information regarding the state of the machine?

And one more thing we can test. What about restoring a rdiff backup(+MBR backup) to a fresh lvm disk ... maybe it will boot in blue screen, but it might work.

On 02/11/2011 12:36 AM, James Harper wrote:
Hi Mike,

agreed. For situations however where data files that are typically
opened with user applications like Word, Excel and other, I think it
might be safe to just snapshot the underlying LVM while the Windows DomU
is running and the users are not accessing the files (typically at
night), mount this and copy from it. I'm actually testing this now. If
there's interest I will post my findings.

The Citrix Windows PV drivers include a VSS provider that (I think) allows you 
to ensure that your snapshot is consistent at both a filesystem and application 
level. I've thought about this for GPLPV but have never actually done anything 
about it.


Best regards,
System Administrator - Appnor MSP S.A.
US: (+1) 650 336 57 50
RO: (+4) 021 569 46 56

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