Greetings Alan Altmark,
Thanks.
Paul Flint
On Thu, 27 Oct 2016, Alan Altmark wrote:
Date: Thu, 27 Oct 2016 15:01:43 +0100
From: Alan Altmark <alan_altm...@us.ibm.com>
Reply-To: Linux on 390 Port <LINUX-390@VM.MARIST.EDU>
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Docker on Z - One less lier?
On Wednesday, 10/26/2016 at 11:05 GMT, Paul Flint <fl...@flint.com> wrote:
In zVM land you have a kick ass memory manager that essentially lies to
each Virtual Machine and tells it that the memory limit is in the
Exabytes
(gee, I love that word :^). The guest operating system on the Virtual
Machine in turn uses this lie to set the limit the docker engine can
operate a docker instance based upon the lie it got from zVM.
While the *architecture* limits the memory to 16EB, the *machine* may (and
will) establish a smaller value based on construction.
You can figure it out by setting the MAXSTOR value in your directory entry
to 16E and then trying to DEFINE STORAGE 16E. If you exceed the machine
maximum, you get an error like this
Storage size (16E) exceeds hardware maximum (16T)
That's a hardware statement. From a software point of view, z/VM supports
virtual machines up to 1TB. You can define larger, but they aren't
supported.
Alan Altmark
Senior Managing z/VM and Linux Consultant
Lab Services System z Delivery Practice
IBM Systems & Technology Group
ibm.com/systems/services/labservices
office: 607.429.3323
mobile; 607.321.7556
alan_altm...@us.ibm.com
IBM Endicott
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Kindest Regards,
☮ Paul Flint
(802) 479-2360 Home
(802) 595-9365 Cell
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Paul Flint
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