Re: performance of internal vs san for 7TB

[Diego Kesselman <diegokesselman@xxxxxxxxx>]

Jim,

It depends on your actual controllers, RAID level , transactions, etc. In
my experience , you  need to move from RAID5 to RAID 10 and use diskmagic
for modeling

El mar., jun. 2, 2015 8:53 AM, Jim Oberholtzer <midrangel@xxxxxxxxxxxxxxxxx>
escribió:

> Jim,
>
> Without knowing the limits placed on internal vs. SAN disk at the DR site,
> I'm not sure how to approach your question.  That said, SAN vs. Internal
> disk should perform nearly the same assuming the SAN is set up properly and
> the zoning is correct on the SAN switch.  Without further information I'd
> go
> with the large partition on SAN and the smaller one on internal storage.
> Truthfully the SAN disk may outperform the internal disk depending on
> spindle sizes, types of controllers, etc.  In the end if it's a DR test,
> and
> the system is recovered and comes up, that's what counts, is it not?
>
> --
> Jim Oberholtzer
> Chief Technical Architect
> Agile Technology Architects
>
>
> -----Original Message-----
> From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Jim
> Franz
> Sent: Tuesday, June 02, 2015 8:35 AM
> To: Midrange Systems Technical Discussion
> Subject: performance of internal vs san for 7TB
>
> We run a Power 7+ with 2 lpars, one is 1.4TB and other is 6.4TB, all
> internal disks (19A1 - 236GB).
> Our DR provider needs to split that into internal and SAN disk (all at
> remote data center). How to confirm performance will be similar (or at
> least
> acceptable)? What to ask and verify?  Must confirm acceptable configuration
> before annual test.
> (switching providers is not an option)
>
> Jim Franz
> --
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