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[Xen-users] Backup running Windows machines - redundancy

  • To: "Paul Piscuc" <paul.piscuc@xxxxxxxxxx>
  • From: "Guido Hecken" <guido.hecken@xxxxxxxxxxxxx>
  • Date: Fri, 11 Feb 2011 01:26:54 +0100
  • Cc: xen-users@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Thu, 10 Feb 2011 16:28:25 -0800
  • List-id: Xen user discussion <xen-users.lists.xensource.com>
  • Thread-index: AcvJdw1MKZ/1VVMuSk62o9AsYkcMHgAAJAOQ
  • Thread-topic: [Xen-users] Backup running Windows machines - redundancy


but the problem with rdiff-backup on windows is the lack of suppport for 
metadata like acls, as discussed earlier in this thread.
I think, what you're trying to achive is some kind of disaster recovery and the 
methods mentioned before like dd, ntfsclone and probably other image based 
tools will do a better (more consistent) job on your data.

As Bart stated earlier in this thread, one could dump the acls in some kind of 
controlfile, do some rdiff-backup and in case of a restore scenario, put them 
back in place.
I found the tool "icacls" which should dump and later *restore* the acls.

This should bring us, together with other methods from this thread, on the way 
to an incremental backup solution with rdiff and windows acl support.
I'll give it a try...


-----Ursprüngliche Nachricht-----
Von: Paul Piscuc [mailto:paul.piscuc@xxxxxxxxxx] 
Gesendet: Freitag, 11. Februar 2011 00:02
An: James Harper
Cc: Bart Coninckx; Mike Sun; Guido Hecken; xen-users@xxxxxxxxxxxxxxxxxxx
Betreff: Re: [Xen-users] Backup running Windows machines - redundancy


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.
>> B.
> 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.
> James

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

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