On Thursday, 12/02/2004 at 07:19 MST, "Seader, Cameron"
<[EMAIL PROTECTED]> wrote:
> Where is some good documentation on setting this up? Currently I have
real
> devices defined for each guest for hipersockets, so I am losing 4
addresses per
> guest. Is there another way of doing this? Which ways are there of doing
this?
> I have read documentation that seems to indicate that you should be able
to
> have 256 addresses per channel and with z/VM you get 4 channels, so you
should
> be able to get about 1024 addresses, is this correct? If this is correct
then
> how are you able to use these 1024 addresses. We are getting messages on
our
> consoles after we do an IPL on our z/OS and such that we have basically
over
> defined the amount of addresses on an LPAR. Can you specify more than
127
> addresses in your IODF per channel. Where is this limitation coming
from?
> Something is amiss.

Type         Max IQD chpids      Max CUs/chpid    Max Devs    Max
Interfaces
z800/z900          4                  16            3072          1024
z890/z990         16                  64             12K          4096

If you need more that 256 devices on a chpid, you have to define
additional CUs in IOCP.  Every address shared across 'n' LPARs counts as
'n' devices against the maximum device limit.  Device the device count by
3 to get the maximum number of stacks or interfaces.

The IOCP User's Guide for your machine has these numbers (except Max
interfaces) documented in the Machine Limits appendix.

Alan Altmark
z/VM Development
IBM Endicott

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