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What is reorganization of a VSAM file

 
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reachcyrus

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Joined: 13 Jul 2007
Posts: 24
Location: chennai

PostPosted: Fri Jul 27, 2007 1:01 pm    Post subject: What is reorganization of a VSAM file
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Hi,

what is reorganization of a VSAM file?
cheers!!
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murmohk1

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Joined: 29 Jun 2006
Posts: 1439
Location: Bangalore,India

PostPosted: Fri Jul 27, 2007 1:08 pm    Post subject:
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Cyrus,

Refer the previous post -

http://ibmmainframes.com/about3916.html
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expat

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Joined: 14 Mar 2007
Posts: 8593
Location: Back in jolly old England

PostPosted: Fri Jul 27, 2007 2:47 pm    Post subject:
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In addition to the thread linked to by murmohk1

With speed, cahing and read ahead algorithms of modern DASD subsystems, there will be little if any performance benefit from doing a reorg of a KSDS. Maybe if it reduces the number of index levels being used by the KSDS, byt that is quite a rare occurance too.

So, if your KSDS is nearing its 123 extent limit, that's the time to think about a reorg.
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