Preliminary performance numbers.
A complicated batch process taking 2 hours on 10k spinny took 53 minutes on R&D with virtual SSD, equaling or exceeding Production LPAR times.
5 NWSD with 6 100gb NWSSTG each, 30 NWSTG total.
My manager asked if I could somehow improve our R&D test runs to be closer to Production run times.
I knew the 10k spinny were the issue.
I had extra SSD on Production LPAR which was purchased for a project that was later cancelled.
I virtualized 3tb of SSD from Production LPAR to R&D LPAR.
The R&D LPAR has a large amount of cold data, 8TB, which would be hard to cost justify 100% SSD.
On the R&D LPAR, using RSTLIBBRM, restoring to ASP2 , (5 NWSD with 6 100gb NWSSTG each, 30 NWSTG total). which is the virtual SSD on the client R&D LPAR, I can control by library which R&D environment needs performance.
I had some other posts about trying to virtualize the 10k load source, but at this time I do not think this will be necessary.
I've seen this many times over the years with improvements to the DASD subsystem.
Majority of the time, DASD improvements will result in the largest savings when it comes to large batch processing.
Paul
-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Holger Scherer
Sent: Monday, June 27, 2016 1:44 PM
To: Midrange Systems Technical Discussion
Subject: Re: Improve R&D LPAR poor disk performance (10K spiiny) by using virtualized SSD from Production LPAR
For performance - at least 6 NWSSTG per system, max 16 (32?) NWSSTG per NWSD.
for performance comparison HDD/SDD - absolutely same config (# NWSSTG / NWSD / Disk size)
If performance is not *that* issue -> one big NWSSTG is ok ;-)
-h
Am 27.06.2016 um 19:41 schrieb Rob Berendt <rob@xxxxxxxxx>:
I just remember something about 6 or more storage spaces per nwsd.
And if you have a few storage spaces it's better to also have more nwsd's.
Like, instead of maxing out the storage spaces per nwsd, create more
nwsd's.
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