Re: Using Virtual Tape with Shared Power Queues

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Subject: Re: Using Virtual Tape with Shared Power Queues
From: Louis Callari (louis.callari@yahoo.com)
Date: Tue Nov 10 2009 - 17:28:25 EST 

Thanks Kevin,

I'll give it a shot.

Louie




________________________________
From: Kevin Corkery <kcorkery@live.com>
To: VSE Discussion List <vse-l@Lehigh.EDU>
Sent: Tue, November 10, 2009 5:05:55 PM
Subject: RE: Using Virtual Tape with Shared Power Queues


The only way to keep the tape server partition active (barring any new development from IBM) is to allocate a virtual tape drive using a VTAPE START command and never stop it.  As long as a virtual tape drive stays allocated the tape server will continue to stay up.  You could release a job at the end of your BG initialization procedure like ...
 
* $$ JOB JNM=VTSTART,DISP=L,CLASS=0
* $$ LST LST=SYSLST,PURGE=0,CLASS=A,DISP=H
// JOB VTAPE START
// VTAPE START,CUU=<one you never use>,LOC=VSAM,FILE='ADUMMY',SCRATCH
/*
/&
* $$ EOJ
 
Of course, you'll need a VSAM file and standard label for the ADUMMY VSAM file since the job will terminate but the label muct be available.  A  job would be needed as part of your shutdown procedures to STOP the use of the VTAPE unit.
 
 
* $$ JOB JNM=VTSTOP,DISP=L,CLASS=0
* $$ LST LST=SYSLST,PURGE=0,CLASS=A,DISP=H
// JOB VTAPE STOP
// VTAPE STOP,CUU=<one you never use>
/*
/&
* $$ EOJ


________________________________
From: owner-vse-l@Lehigh.EDU [mailto:owner-vse-l@Lehigh.EDU] On Behalf Of Louis Callari
Sent: Tuesday, November 10, 2009 4:54 PM
To: VSE Discussion List
Subject: Using Virtual Tape with Shared Power Queues


Is anyone out there using Virtual Tape with shared power queues?

The problem that I'm having is that if I run a job on System A that uses a virtual tape a 
PRELEASE RDR,TAPESRVR is issued and the TAPESRVR job may kick off on System B so the job on System A fails to allocate the virtual tape and the job fails.

Does anyone know how to override the PRELEASE stmt so I can kick off a different tapesrvr job on system B so that it will actually run on system B.

One solution would be to have the TAPESRVR job constantly running instead of going to EOJ after the virtual tape processing is completed, I seem to remember someone talking about this a while back but I don't remember the resolution.

Any comment will be appreciated.

Thanks....

Louie Callari
Sitel
716-871-2939

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