We receive a request from a new customer for a z/Linux guest on a BC12. The
specification that the vendor supplied is for an intel platform. Does anyone
know is there a formula to convert intel cpu cores to IFL?
Regards,
Victor Echavarry
System Programmer
Operating Systems
EVERTEC, LLC
(sighs)
"It depends"...
1) On the kind of workload (compute vs I/O)
2) Requirements for reliability (look at Appendix A? from "Linux for the
S/390")
There is no simple answer to this. I suspect there are some benchmarking
tools that will help.
The zSeries is AT LEAST 5 9's hardware.
Because W
Yes. Gigahertz is gigahertz. If you can measure ghz consumed on x, you can
guestimate requirements on z. The only way to understand requirements is to
know current use.
Barton
> On Nov 7, 2017, at 8:28 PM, Victor Echavarry Diaz
> wrote:
>
> We receive a request from a new customer for
Zero might be the best quick real answer to the question in the subject.
If the workload is known to run on the platform, folks might be willing to
share their experiences. No matter what, consider running test that can be
scaled while measuring true impact to set real expectations.
IBM offers s
:How many Intel cores does an IFL emulate
Sent by:Linux on 390 Port
We receive a request from a new customer for a z/Linux guest on a BC12. The
specification that the vendor supplied is for an intel platform. Does
anyone know is there a formula to convert intel cpu cores to IFL
GHz is GHz primarily when comparing CISC vs CISC. While you can try to use
this, a lot depends upon how well the microcode can make a CPU process the
"usual" machine code.
CISC vs RISC-- zSeries vs pSeries, for instance, the GHz (I remember when
it was 2MHz for mainstream microcomputer CPUs) more
On 07.11.2017 23:04, John Campbell wrote:
> 1) On the kind of workload (compute vs I/O)
> 2) Requirements for reliability (look at Appendix A? from "Linux for the
> S/390")
>
> There is no simple answer to this. I suspect there are some benchmarking
> tools that will help.
>
> The zSeries is AT
John Campbell wrote:
>The zSeries is AT LEAST 5 9's hardware.
Philipp Kern wrote:
>Does that matter in today's world? Would you avoid building for failure
>when a lot of the failure comes from software anyway? Do you then host
>multiple Linux VMs on the same iron to account for that? If so, why
>c
y/index.html
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From: John Campbell
To: LINUX-390@VM.MARIST.EDU
Date: 08/11/2017 02:16
Subject: Re: How many Intel cores does an IFL emulate
Sent by:Linux on 390 Port
GHz is GHz pri
nt: Tuesday, November 07, 2017 9:28 PM
To: LINUX-390@VM.MARIST.EDU
Subject: How many Intel cores does an IFL emulate
We receive a request from a new customer for a z/Linux guest on a BC12. The
specification that the vendor supplied is for an intel platform. Does anyone
know is there a formul
On Wednesday, 11/08/2017 at 03:17 GMT, Philipp Kern
wrote:
> I idly wonder how actual utilization of IFLs looks like in the field.
> It's clear to me that CPs run hot because otherwise you're wasting
> moneys. I.e. if overcommitment is just a fact of life like it is in the
> cloud.
I don't follo
Hi,
On 08.11.2017 16:42, Alan Altmark wrote:
> On Wednesday, 11/08/2017 at 03:17 GMT, Philipp Kern
> wrote:
>> I idly wonder how actual utilization of IFLs looks like in the field.
>> It's clear to me that CPs run hot because otherwise you're wasting
>> moneys. I.e. if overcommitment is just a fa
On Wednesday, 11/08/2017 at 09:55 GMT, Philipp Kern
wrote:
> I thought unused CP capacity was literally costing OpEx whereas IFLs
> would be CapEx? If it's both OpEx, then yes, agreed. (And I suppose
> originally there might have been deals about giving some IFLs with
> upgrades? ;-)
Eh? Proces
Come to think of it, I think an IFL is a single zSeries core. z/VM can
fake it, though that's "overcommitting" the CPU resource.
Despite my NOT looking at the zSeries Principles of Operation I somehow
doubt the zSeries has hyperthreading... as the z/VM OS would be dispatch
threads. On the Intel
:
From: soup...@gmail.com
To: LINUX-390@VM.MARIST.EDU
Cc:
Date: Nov 8, 2017, 8:36:39 PM
Subject: Re: [LINUX-390] How many Intel cores does an IFL emulate
Come to think of it, I think an IFL is a single zSeries core. z/VM can
fake it, though that's "overcommitting" t
z/OS supports ZIIPs with SMT-2 as well.
-Original Message-
From: Alan Altmark [mailto:alan_altm...@us.ibm.com]
Sent: Wednesday, November 8, 2017 5:52 PM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: How many Intel cores does an IFL emulate
Thanks for advertising, Soup! :-)
In fact, IFLs
sing IBM Verse
>
> On Nov 8, 2017, 8:36:39 PM, soup...@gmail.com wrote:
>
> From: soup...@gmail.com
> To: LINUX-390@VM.MARIST.EDU
> Cc:
> Date: Nov 8, 2017, 8:36:39 PM
> Subject: Re: [LINUX-390] How many Intel cores does an IFL emulate
>
>
>Come to think of
*All* resources have cost attributes. I'm quite sure Netflix, for example,
spends a huge sum on computing resources, although to my knowledge they
don't have a mainframe -- at least not one of their own. (Maybe they
should!) I would also point out that the world's top wealthiest people
often acquir
oup...@gmail.com
> To: LINUX-390@VM.MARIST.EDU
> Cc:
> Date: Nov 8, 2017, 8:36:39 PM
> Subject: Re: [LINUX-390] How many Intel cores does an IFL emulate
>
>
>Come to think of it, I think an IFL is a single zSeries core. z/VM can
> fake it, though that's "
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Linux on 390 Port wrote on 08/11/2017 02:11:23:
> From: John Campbell
> To: LINUX-390@VM.MARIST.EDU
> Date: 08/11/2017 02:16
> Subject: Re: How many Intel cores does an IFL emulat
"zSeries" is twelve years (and at least three rebrandings*) gone, gang. Same
with "pSeries".
That's "IBM Z" and "IBM Power Systems" nowadays.
If you're talking about specific capabilities, it's sort of important to be
precise, eh?
...phsiii
* zSeries=>System z=>z Systems=>IBM Z
(with "zEnterpri
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