What is the difference between a computer salesman and a used car salesman? The car salesman knows when he's lying.
David Dean Information Systems *bcbstauthorized* Life is too important to be taken seriously -----Original Message----- From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On Behalf Of Rob van der Heij Sent: Tuesday, February 03, 2009 10:07 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: Correcting Statements From Marketing On Tue, Feb 3, 2009 at 3:50 PM, Robert J Brenneman <bren...@gmail.com> wrote: > There is most definitely a MP factor with IFLs, just like there is > with CPs, and just like there is with every other SMP architecture > that exists today. There is no significant difference between an IFL > and a ***full speed*** CP when it comes to the MP effect and capacity > planning. The sentence resembles the tests at school where you have to put words on the dots to make it a correct statement. Maybe IBM marketing folks were unable to finish that one. And I can see why... I have seen a similar statement with zAAP sizing. If z/OS is indeed such that management of those processors runs on the zAAPs itself, then you could conclude that adding zAAPs to your configuration does not increase the MP overhead in z/OS itself as when you added real CPs. But the thing that *is* relevant to z/OS shops is that adding IFLs to their CP-only machine (to run z/VM and Linux) does not increase the MP effect in z/OS. Adding 10 IFLs does not slow down your 10 CPs running z/OS (apart from low level hardware effects like sharing the bus and cache with twice as many processors). My guess is that the person writing that sentence wanted to clarify this part. But your guess is a good as mine. Rob -- Rob van der Heij Velocity Software http://www.velocitysoftware.com/ ----------------------------------------------------- Please see the following link for the BlueCross BlueShield of Tennessee E-mail disclaimer: http://www.bcbst.com/email_disclaimer.shtm
