200 MSU was much more than we needed. Maybe 20 or so at our peaks. And the z/OS 
and ISV charges at 200 levels would have been intolerable.

> -----Original Message-----
> From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On
> Behalf Of Timothy Sipples
> Sent: Monday, June 26, 2023 10:08 PM
> To: IBM-MAIN@LISTSERV.UA.EDU
> Subject: Re: z/OSMF
> 
> [EXTERNAL EMAIL]
> 
> Andrew Rowley wrote:
> >I've said it before but I'll say it again - to avoid embarrassment
> >alongside 5 year old laptops or perhaps even a Raspberry Pi, IBM needs
> >to figure out how to bring the smallest z/OS systems up to a modern
> >configuration - I would suggest minimum 4 processors and 200 MSU.
> 
> IBM doesn't require anyone to order/configure less than 200 MSUs (PCIs) of
> general purpose processor capacity. If you want to order a configuration like
> that go for it!
> 
> Bearing in mind that VSEn is important and also exists, and IBM really ought 
> to
> be building machines that also cater to VSEn customers, here's the current
> minimum orderable machine configuration (latest model) for z/OS and VSEn:
> 
> * IBM z16 A02 (or AGZ for rack mount)
> * Capacity Model A01
> * Base CP capacity: 105 PCIs (13 MSUs)
> * z/OS System Recovery Boosted capacity (standard/no additional charge):
> 1,982 PCIs
> * 64GB of usable memory (plus HSA)
> 
> Add just 1 zIIP and you get ~1,900 PCIs of full-time zIIP capacity with 2
> processor threads (SMT2). You can add as many zIIPs as you wish up to the
> physical capacity of the machine.
> 
> Capacity Model A01 continues to be zELC eligible on the full capacity. Even
> though it has 105 PCIs (plus System Recovery Boost, plus more and far better
> on chip accelerators, plus optional zIIPs) it still qualifies for the same 
> software
> licensing tier that the ~26 PCIs IBM z890 Model 110 did 19 years ago.
> 
> I don't see any problem here. If 105 PCIs/13 MSUs (plus a zIIP I suggest) is 
> all
> you need for your z/OS computing, well OK then! That model is available, and
> (in most countries) you can get a nifty rack mounted form factor if you'd 
> like. If
> you need more, OK, that's available too.
> 
> Here's the recent history of minimum orderable/configurable CP capacity (all
> Capacity Models A01):
> 
> IBM z16 A02/AGZ: 105 PCIs*
> IBM z15 T02: 98 PCIs**
> IBM z14 ZR1: 88 PCIs
> IBM z13s: 80 PCIs
> IBM zBC12: 50 PCIs
> IBM z114: 26 PCIs
> 
> * System Recovery Boost capacity: 1,982 PCIs
> ** System Recovery Boost capacity: 1,761 PCIs
> 
> The z114 was announced in 2011 and the z16 A02/AGZ in 2023. Over that
> period IBM increased the minimum orderable CP capacity by ~12.4% per year
> (compounded), plus SRB.
> 
> -----
> Timothy Sipples
> Senior Architect
> Digital Assets, Industry Solutions, and Cybersecurity IBM zSystems/LinuxONE,
> Asia-Pacific sipp...@sg.ibm.com
> 
> 
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