Good luck. I asked this question about 6 months ago. Got many different
responses, not many general rules-of-thumb it seems. I ended up with 3
mod-27's per lpar, with two local page datasets on each volume. Seems to be
working ok. I do not share same volume with multiple lpars.
IEE200I 11.16.56 DISPLAY ASM 809
TYPE FULL STAT DEV DATASET NAME
LOCAL 10% OK 7312 PAGE.SYS1.LOCAL1
VOLSER DEVTYP SIZE USED AVAIL ERRORS
PAGS11 3390P 2,702,879 292,178 2,410,701 0
PAGE.SYS1.LOCAL1 *VSAM*
VS
CATALOG.VREZ138
------------------------------------------------------------------------------
PAGE.SYS1.LOCAL1.DATA PAGS11
225240 ? 1 3390 VS ? ? ? 2014/04/24 2014/04/24
CATALOG.VREZ138
_________________________________________________________________
Dave Jousma
Assistant Vice President, Mainframe Engineering
[email protected]
1830 East Paris, Grand Rapids, MI 49546 MD RSCB2H
p 616.653.8429
f 616.653.2717
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf
Of Lizette Koehler
Sent: Wednesday, November 19, 2014 10:42 AM
To: [email protected]
Subject: Page Data Set Sizes and Volume Types
I have been reviewing various documents on how to size the Page Data Sets.
I was wondering if there are any guidelines on what can be used today. This
should be kept to z/OS V1.12, 1.13 and 2.1 which I think will be the more
dominant operating systems in use right now.
I know that the number of Slots will drive what I allocate. So I am looking for
the following information. I have not done this in many years so I am very
rusty.
1) How to calculate the number of slots per page datasets
a) I need to base this on 3390 Mod 3/9/27/54
2) What do I need to stay away from when determining where the page datasets go
a) For example, if I use a Mod27 and I need to place multiple page
datasets on the volume
Should they all be for the same LPAR if in a PLEX
Should they all be for unique LPARs if in a Plex
3) What are the maximum values I can create a page dataset?
Can I use a whole Mod3/9/27/54 for ONE page dataset?
I have looked through Hot Flashes (Cheryl Watson) and MXG sourclib. I have run
through some of the Redbooks and share presentations.
I am now looking for real life thoughts. I also thought this would be a good
topic for the archives.
Thanks for any information
Lizette
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