Re: Sharing catalog among systems,benefits or trouble?

2008-07-10 Thread Arthur Gutowski
On Wed, 9 Jul 2008 08:22:52 -0500, Mark Zelden [EMAIL PROTECTED] wrote: I obviously agree (I think you were commenting on my post when you wrote very similar sharing here), but it is far from iron-clad. For example, RESERVE won't keep 2 people from updating the same PDS (or PDS member) from

Re: Sharing catalog among systems,benefits or trouble?

2008-07-09 Thread Arthur Gutowski
Very similar level of sharing here. We used to have some application sharing across sysplex boundaries, but it caused far too many problems versus what it solved, so we replicated the data and apps spend a few minutes on the BDT pipe over FCTC's or the ftp pipe over Hipersockets. We share

Re: Sharing catalog among systems,benefits or trouble?

2008-07-09 Thread Mark Zelden
On Wed, 9 Jul 2008 08:00:25 -0500, Arthur Gutowski [EMAIL PROTECTED] wrote: Very similar level of sharing here. snip Bottom line: It can be done if you're careful, understanding and mitigating the risks. RESERVE/RELEASE has been around for a very long time, and while not the most efficient

Sharing catalog among systems,benefits or trouble?

2008-07-08 Thread Victor Zhang
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

Re: Sharing catalog among systems,benefits or trouble?

2008-07-08 Thread Knutson, Sam
] (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

Re: Sharing catalog among systems,benefits or trouble?

2008-07-08 Thread Ted MacNEIL
We choose to not allow any shared DASD across Sysplex boundaries. It eliminates a whole class of problems. We also chose to do the same thing in the mid-1990's. And, at that time, the point was that DASD was cheap enough (especially compared to the integrity problems) then. Now, there is very

Re: Sharing catalog among systems,benefits or trouble?

2008-07-08 Thread Mark Zelden
Nothing wrong with Sam's point of view and agree it is the safest. On Tue, 8 Jul 2008 10:47:43 +, Ted MacNEIL [EMAIL PROTECTED] wrote: Now, there is very little argument for sharing. In a few cases, we have to. Our Sun/STK VSMs and tape libraries are shared across sysplexes, so their

Re: Sharing catalog among systems,benefits or trouble?

2008-07-08 Thread Ted MacNEIL
Sharing DASD was around long before sysplex... There are two falacies regarding technology: 1. This is old, therefore good. 2. This is new, therefore better. Shared DASD has been around for a long time, but I will only share within SYSPLEX boundaries. Sharing outside a SYSPLEX (or a Single

Re: Sharing catalog among systems,benefits or trouble?

2008-07-08 Thread Tom Marchant
On Tue, 8 Jul 2008 13:38:06 +, Ted MacNEIL wrote: ... I will only share within SYSPLEX boundaries. So how do you deal with the issues that Mark mentioned? -- Tom Marchant -- For IBM-MAIN subscribe / signoff / archive

Re: Sharing catalog among systems,benefits or trouble?

2008-07-08 Thread Ted MacNEIL
So how do you deal with the issues that Mark mentioned? I have only dealt with three or less SYSPLEX systems. I have also dealt with mostly financial institutions. In those cases the integrity issues were more important than the cost of data duplication. (PS: I was only giving my opinion based

Re: Sharing catalog among systems,benefits or trouble?

2008-07-08 Thread Hal Merritt
a reserve and not hurt anything. HTH -Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Victor Zhang Sent: Tuesday, July 08, 2008 2:36 AM To: IBM-MAIN@BAMA.UA.EDU Subject: Sharing catalog among systems,benefits or trouble? Hi all, We have

Re: Sharing catalog among systems,benefits or trouble?

2008-07-08 Thread Vernooy, C.P. - SPLXM
Victor Zhang [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED]... 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