without something like GX or an acopia switch you cannot achieve full transparency.  it should be pretty quick with snapmirror though unless you are migrating 300+ volumes.

you could always pull the fire alarm right before the cutover and quickly do the final sync and cutover while everyone is evacuating the office...

:)


--
Daniel Leeds
Manager, Storage Operations
Edmunds, Inc.
1620 26th Street, Suite 400 South
Santa Monica, CA 90404

310-309-4999 desk
310-430-0536 cell



-----Original Message-----
From: owner-toasters@mathworks.com on behalf of Simon Vallet
Sent: Mon 7/28/2008 3:08 AM
To: toasters@mathworks.com
Subject: Migrating data without service interruption : 3020 -> 3140

Hi,

we just received a new 3140 cluster here to upgrade an existing 3020c
production filer. And now we're looking for a way to migrate the
existing data (~18TB) with the least possible downtime.

Ideally, we would use SnapMirror to copy the data on the new filer and
then transparently (for clients) switch the production system,
similarly to what happens when a cluster member fails over to the other
member. But we don't know if this is possible.

So the questions are:
- do you think such a procedure could be successful ?
- do you have any other ideas to migrate the data without service
interruption ?

Cheers,
Simon

--

Simon Vallet
Ingénieur Système/Réseaux
CEA DSV/IG/GEN - Genoscope
Tél : +33 1 60 87 36 06
Mél. : svallet@genoscope.cns.f