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Lockdown 'DELETE GDG, FORCE' Command...

 
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Anuj Dhawan

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Joined: 22 Apr 2006
Posts: 6258
Location: Mumbai, India

PostPosted: Mon Feb 22, 2010 9:55 pm    Post subject: Lockdown 'DELETE GDG, FORCE' Command...
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Hi,

Till yesterday everything was fine and, all of sudden, today they told us "'DELETE GDG, FORCE' Command" will be locked down in the LPAR I work.

When I asked them they say,
Quote:
Unfortunately, much of the IBM documentation is not very clear on the hazards of using ‘DELETE GDG FORCE’ commands. The documentation extracts below all come from z/OS v1r9 IBM manuals.

The clearest documentation on the effects of ‘DELETE GDG FORCE’ commands are found in DFSMShsm manuals. We have highlighted key statements in red.

Here is a section from the DFSMShsm Implementation and Customization Guide (p. 398):

Access Method Services DELETE GDG FORCE Command

Assume that you have a generation data group with generation data sets that have migrated, and you wish to delete the group. If you use the Access Method Services DELETE GDG FORCE command to delete the catalog entries for the generation data group and its generation data sets, IDCAMS does not invoke DFSMShsm. You must then issue the DFSMShsm DELETE command for each of the now-uncataloged migration copies.

I really feel like a JCLM, not sure if some one has faced this already - would like to know what they think, is it a good idea, in real?
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expat

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Joined: 14 Mar 2007
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Location: Back in jolly old England

PostPosted: Mon Feb 22, 2010 10:39 pm    Post subject:
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A lot of places restict the use of FORCE to storage and sysprog people.

One place they said it was because it focused the mind that you really did want to do this. For me it's not a problem as I have a REXX that will delete all of the generations and then the base definition.

As from a storage view, it is better that there are no uncataloged datasets held in the MCDS, however a HSM audit will highlight these datasets and offer the code to delete the HSM entries. On a downside, an audit can take up to 48 hours to complete.
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Anuj Dhawan

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Joined: 22 Apr 2006
Posts: 6258
Location: Mumbai, India

PostPosted: Tue Feb 23, 2010 5:57 pm    Post subject:
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Thank you, Expat.

that means, using the ‘DELETE GDG FORCE’ command causes migrated GDSs to become uncataloged, but not deleted. This data takes up space and will be billable to the data owners, right?
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expat

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Location: Back in jolly old England

PostPosted: Tue Feb 23, 2010 6:27 pm    Post subject:
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That is what it says in the good book. So yes they will be billable if HSM is a billable component for the bean counters.
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Anuj Dhawan

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PostPosted: Tue Feb 23, 2010 7:02 pm    Post subject:
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Fine, Thanks expat.
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