ca.portal.admin

Re: [IDMSVENDOR-L] zIIP simulation

Discussion created by ca.portal.admin on Mar 8, 2010
Kay - i do not hink we saw any overhead - but i cannot be sure - I would
recommend opening an issue with CA on this - have you applied all known
ZIIP PTFs ?


Chris Hoelscher
IDMS/DB2 Database Architect
Humana Inc
502-476-2538
choelscher@humana.com

you only need to test the programs that you want to work correctly






From:
""Rozeboom, Kay [DAS]"" <KAY.ROZEBOOM@IOWA.GOV>
To:
IDMSVENDOR-L@LISTSERV.IUASSN.COM
Date:
03/08/2010 01:16 PM
Subject:
[IDMSVENDOR-L] zIIP simulation
Sent by:
IDMS 3rd-party providers forum <IDMSVENDOR-L@LISTSERV.IUASSN.COM>



We have tried the new R17 zIIP simulation, which means turning on IDMS
zIIP=3D
without actually having a zIIP processor. The results were promising.

However, we made an unpleasant discovery. We experienced a CPU increase
of=3D
30% or more, and a noticeable increase in online response time. This is
b=3D
ecause turning zIIP on, even as a simulation, has a significant overhead
of=3D
its own. Since we do not yet have a zIIP processor, nothing was
actually=3D
offloaded to the zIIP to compensate for the additional overhead.

I do not in any way mean to imply that you should not try this. It is a
ne=3D
cessary first step in justifying the purchase of a zIIP processor. It is
g=3D
reat that CA has supplied this feature. Just be aware that there is a
cost=3D
to using it, and consider warning your users ahead of time.

Kay Rozeboom
State of Iowa
Information Technology Enterprise
Department of Administrative Services
Telephone: 515.281.6139 Fax: 515.281.6137
Email: Kay.Rozeboom@Iowa.Gov



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Re: [IDMSVENDOR-L] zIIP simulation
"Already done. CA acknowledges the overhead. We are not the first site to report this.

It is especially noticeable with online ADS processing. I believe that your pilot project involved the IDMS equivalent of a file-owning region? So little or no user code was involved?

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