No journaling on either LPAR.
R&D was actually 3 mins faster than Production.
Production actually had more resources.
CREATE INDEX CABLEFILES/CCEKlC3 ON CCEKCPP (EKNROV, EKACEC, EKBGO6, EKCNBR, EKNUO9, EKNUPA, EKCEK6) rcdfmt #EKCPTT
Production R&D
Create Index time 16 min 13 Min
CPU 1.5 1.0
MEM 196 gb 40 gb
DASD Controller 5913 5913
DASD SSD 10k spinny
Paul
-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of rob@xxxxxxxxx
Sent: Monday, September 15, 2014 3:40 PM
To: Midrange Systems Technical Discussion
Subject: Re: Performance of large LF access path builds - SSD vs 10K spinny
Is everything else truly equal?
Are both lpars using the same media?
Are you journalling on the Production lpar with SSD's but not on the R&D lpar with 10k spinny? Journalling, without the HA Journal Performance (fee charged) part of IBM i installed, can be a significant impact on performance. We first bought SSD's on Power 6 to put certain files on there based on some trials we did in Rochester that showed awesome performance on SSD's. However, we weren't journalling in Rochester. That was where the performance gain was. Not the SSD's. Put on option HA Journal Performance and it ran like a scalded dog.
Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1 Group Dekko Dept 1600 Mail to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com
From: "Steinmetz, Paul" <PSteinmetz@xxxxxxxxxx>
To: "'Midrange Systems Technical Discussion'"
<midrange-l@xxxxxxxxxxxx>
Date: 09/15/2014 02:32 PM
Subject: Performance of large LF access path builds - SSD vs 10K
spinny
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>
We did a 3rd party software upgrade this weekend, which included some
large LF access path builds.
The time on our production LPAR with SSD was the same as the time on R&D
LPAR with 10k spinny.
P7 740 E6C CPU, memory, DASD controller, 5913, resources comparably the
same.
From other benchmark jobs, I expected a 4x increase with the SSD drives
compared to the 10k spinny.
This did not occur, times were the same.
Any thoughts from the group?
Thank You
_____
Paul Steinmetz
IBM i Systems Administrator
Pencor Services, Inc.
462 Delaware Ave
Palmerton Pa 18071
610-826-9117 work
610-826-9188 fax
610-349-0913 cell
610-377-6012 home
psteinmetz@xxxxxxxxxx<mailto:psteinmetz@xxxxxxxxxx>
http://www.pencor.com/
midrange.com
