David, excellent explanation.
But the syntax of DEDICATE are inverted: must be "virtual on real" ( I
think V=R when define DEDicate, to never forget).
So:
In the directory for z/OS 2:
DEDICATE 7D0 7D3
DEDICATE 7D1 7D4
DEDICATE 7D2 7D5
Regards, Clovis
From: David Boyes <dbo...@sinenomine.net>
To: IBMVM@LISTSERV.UARK.EDU
Date: 30/07/2010 11:58
Subject: Re: z/VM & OSA with z/OS guest
Sent by: The IBM z/VM Operating System <IBMVM@LISTSERV.UARK.EDU>
If you want to stick to dedicating the adapters, you¹ll need to use
different real addresses (eg, 7D0,7D1,7D2, 7D3, 7D4, 7D5, etc), but
dedicate
them to the same virtual address (eg 7D0, 7D1, 7D2) in the CP directory for
the zOS guests.
In the directory for z/OS 1:
DEDICATE 7D0 7D0
DEDICATE 7D1 7D1
DEDICATE 7D2 7D2
(the easy case).
In the directory for z/OS 2:
DEDICATE 7D3 7D0
DEDICATE 7D4 7D1
DEDICATE 7D5 7D2
(z/OS 2 still sees addresses 7D0-7D2, but the real hardware uses a
different
OSA triplet so everyone plays nice). Do the same with z/OS 3.
If you¹re willing to experiment and get a MUCH niftier way of doing it
(dedicating devices is SO old-skool z/OS... Sniff), use a VSWITCH.
Define the VSWITCH with real device 7D0 as the real device in DEFINE
VSWITCH. Grant ZOS1, ZOS2, and ZOS3 access to the VSWITCH. Then in the CP
directory use NIC statements for 7D0 connected to the VSWITCH. Slick, easy
to manage, and MUCH more flexible in how you use the hardware.
> At current time, I have each z/OS guest with his own triplet of unique
OSA
> addresses. Each one will work fine UNTIL they are all up and running, at
which
> time, we start seeing ³console hangs² and what appears to be machine
lockups.
> Some times they will eventually clear themselves, sometimes not. And it
> rotates as to which z/OS guest system hangs.
This sounds more like resource exhaustion than a network-related issue.
Look
at the recommendations for system resource management sessions that are in
the Linux guides and in the "running guest OS" manual. A lot of the
problems
are similar (but zOS is even more ill-behaved in some ways).
