Re: OFA on SAN

Andrew Mobbs wrote:
>
> I'm not quite sure what you mean, the SAN array automatically shuffles
> data around disks to keep the load balanced between disks? Neat, if
> it works. When does it do that, on a schedule, or at idle periods or
> something else?

EMC does have a product that does something to that effect - I think it's called Symmetrix Optimizer? Anyway, you can schedule it to run, run it manually, etc., and it reconfigs hotspots in the background. I've never used it though, just heard the vendor pitch (which always sounds good).

> Even if it does work, I'd still be wary about putting online redo into
> that morass. You really do need lightening response times from redo
> writes. If you're paying for an EMC array, surely you can find a bit of
> spare budget for a dedicated tray of disks for redo?

Or just dedicate part of the Symm tower to redos. No reason they have to be outside the array, but probably good reasons not to include them in the same disk pool as the rest of the datafiles. Now if you're talking a NAS setup, then you might not want your redos anywhere near it. ;)

Regards,
Sean Received on Fri Mar 22 2002 - 10:05:00 CST