It's on my (very long) todo list.

Mark Jacobs


-----Original Message-----
From: IBM Mainframe Discussion List on behalf of Mark Zelden
Sent: Thu 1/29/2009 3:23 PM
To: [email protected]
Subject: Re: Local Page Dataset(s) Question
 
On Thu, 29 Jan 2009 14:57:25 -0500, Mark Jacobs <[email protected]>
wrote:

>Mark Zelden wrote:
>> On Thu, 29 Jan 2009 13:12:13 -0500, Mark Jacobs <[email protected]>
>> wrote:
>>
>>
>>> We are using 3390-3's for all our local page datasets and one of our
>>> systems is needing additional paging space. i know the ROT is to keep
>>> all the page datasets the same size but we are running short of mod-3's.
>>>
>>> Is there any reason (with PAV's) not to put three locals on one 3390-9
>>> and dedicate the volume to one system?
>>>
>>> --
>>>
>>
>> If you are at z/OS 1.8 or z/OS 1.9 with APAR OA20749 applied (or
>> z/OS 1.10) you can use the entire mod-9 (or larger - up to 64GB) as
>> a single page data set.
>>
>> Mark
>> --
-
>>
>>
>I knew that but i was attempting to follow the rule of thumb not to have
>different size page datasets on the same system. Does that ROT still matter?
>
>--
>Mark Jacobs
>Time Customer Service
>Tampa, FL
>----

Since the slots will be allocated fairly evenly, then yes that still applies.  

But I wanted to make sure you were aware that you could use mod-9s
since you wrote you were running short on mod-3s.   If you have enough
need, I would re-allocate them all to 3 or more mod-9s (another ROT is
to have at least 3 locals - and I think there is a health check for that too).

Mark
--
Mark Zelden
Sr. Software and Systems Architect - z/OS Team Lead
Zurich North America / Farmers Insurance Group - ZFUS G-ITO
mailto:[email protected]
z/OS Systems Programming expert at http://expertanswercenter.techtarget.com/
Mark's MVS Utilities: http://home.flash.net/~mzelden/mvsutil.html

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