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

[Gordan Bobic <gordan@xxxxxxxxxx>]

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.
> >
> >   Gordan
> 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.
Gordan

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