RE: [Xen-users] Advice on redundant SAN/NAS storage for Xen

[Nathan Eisenberg <nathan@xxxxxxxxxxxxxxxx>]

As Fajar said, fencing is a major concern.  I've used DRBD successfully for 
such setups, but it is the sort of thing you'll want to aggressively and 
thoroughly test prior to deployment, because you don't ever want to deal with 
DRBD split brain.  :) 

Best Regards
Nathan Eisenberg
Sr. Systems Administrator
Atlas Networks, LLC
support@xxxxxxxxxxxxxxxx
http://support.atlasnetworks.us/portal

-----Original Message-----
From: Rudi Ahlers [mailto:rudiahlers@xxxxxxxxx] 
Sent: Saturday, May 30, 2009 10:50 PM
To: Nathan Eisenberg
Cc: Xen User-List
Subject: Re: [Xen-users] Advice on redundant SAN/NAS storage for Xen

On Sat, May 30, 2009 at 10:19 PM, Nathan Eisenberg
<nathan@xxxxxxxxxxxxxxxx> wrote:
> In my experience, effectively using DRBD is a major undertaking, and it can 
> VERY easily cause you a lot of heartache.  Approach with caution!
>
> Best Regards
> Nathan Eisenberg
> Sr. Systems Administrator
> Atlas Networks, LLC
> support@xxxxxxxxxxxxxxxx
> http://support.atlasnetworks.us/portal

Hi Nathan,

Can you please elaborate on this?


And my question, on this same topic, would be, what is wrong with
using 2 standard servers (i.e. not a dedicated, expensive NAS device)
with 2 or 4 HDD's each, setup with something like DRBD / RedHat
Cluster Suite to offer one single redundant NAS / SAN server? Or, even
using something like http://www.openfiler.com/ or
http://www.freenas.org/ ?


-- 
Kind Regards
Rudi Ahlers
CEO, SoftDux Hosting
Web: http://www.SoftDux.com
Office: 087 805 9573
Cell: 082 554 7532





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