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How to dynamically allocate dataset attributes?

 
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beruoist

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Joined: 14 Nov 2007
Posts: 70
Location: mumbai

PostPosted: Wed Oct 08, 2008 11:09 am    Post subject: How to dynamically allocate dataset attributes?
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Hi,

Actually there are two cases..

1.There are few records
2.There are whole bunch of records.

So is there any way by which we can achieve the above cases efficiently.

I have just started working in JCL please explain at Beginner's level

Thanks
Beruoist
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dick scherrer

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Joined: 23 Nov 2006
Posts: 19270
Location: Inside the Matrix

PostPosted: Wed Oct 08, 2008 12:35 pm    Post subject:
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Hello,

It is not clear what you are asking.

Please describe what you mean by "allocate attributes dynamically". In what way does this relate to having a few or many records? Where is your concern for "efficiently" based?

Once we understand what you are looking for, someone should be able to offer some suggestions.
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Bill Dennis

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Joined: 17 Aug 2007
Posts: 562
Location: Iowa, USA

PostPosted: Wed Oct 08, 2008 6:52 pm    Post subject:
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The usual attribute affected by number of records is SPACE. It's important to code RLSE in your JCL to release overallocated space when the file may have only a few records. This allows your JCL to handle various file sizes. Your site may automatically release unused space from certain files based on DFSMS routines.
Code:
 SPACE=(TRK,(15,15),RLSE) 

Does this help?
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