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Re: [Xen-users] Linux Fiber or iSCSI SAN

On 06/11/2013 06:27 PM, Nick Khamis wrote:
On 6/11/13, Gordan Bobic <gordan@xxxxxxxxxx> wrote:
  Heavens forbid we should do some research, prototyping and
  testing before building the whole solution...

  It ultimately comes down to what your time is worth and
  how much you are saving. If you are looking to deploy 10
  storage boxes at $10K each vs. $50K each, you can spend
  a year prototyping and testing and still save a fortune.
  If you only need one, it may or may not be worthwhile
  depending on your hourly rate.


And hence the purpose of this thread :). Gordon, you mentioned that
you did use DRBD
for separate instances outside of the NAS. I am curious to know of
your experience with NAS level replication. What you feel would be a
more stable and scalable fit.

It largely depends on what exactly do you want to do with it. For a NAS, I use ZFS + lsyncd for near-synchronous replication (rsync-on-write).

For a SAN I tend to use ZFS with zvols exported over iSCSI, with period ZFS send to the backup NAS. If you need real-time replication for fail-over purposes, I would probably run DRBD on top of ZFS zvols.


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