We choose to not allow any shared DASD across Sysplex boundaries.
It eliminates a whole class of problems.
* sharing PDSE across Sysplex doesn't work but if you make it possible
someone will try
* RESERVE from another Sysplex much harder to identify and on the wrong
volume can bring down your Sysplex quickly
* Update without proper serialization from another system damages a disk
data set in your Sysplex
* data set read or updated without audit trail in the SMF data recorded
on systems in this Sysplex
You can take steps to prevent these but we have enough to worry about
with things that can go wrong inside a single Sysplex running on
multiple storage subsystems, LPARs, processors, VTS, etc.
Best Regards,
Sam Knutson, GEICO
System z Performance and Availability Management
mailto:[EMAIL PROTECTED]
(office) 301.986.3574
"Think big, act bold, start simple, grow fast..."
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On
Behalf Of Victor Zhang
Sent: Tuesday, July 08, 2008 3:36 AM
To: IBM-MAIN@BAMA.UA.EDU
Subject: Sharing catalog among systems,benefits or trouble?
Hi all,
We have a shared dasd that hold a shared user catalog and there are a
third
party software installed on that dasd, occasionally we met a problem
that a
LPAR will reserve the dasd and there are IOS071I meesage appeared in
syslog/operlog, how can we avoid the problem?
Is it suggested to share catalog and dasd among systems that may from
different sysplex/standalone systems?
Regards
Victor
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