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How to reorg a VSAM KSDS dataset

 
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j_rymbei

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Joined: 22 Aug 2006
Posts: 17
Location: India Kolkata

PostPosted: Thu May 03, 2007 4:31 pm    Post subject: How to reorg a VSAM KSDS dataset
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Hi,
Tried to search in the forum but can't find any. Can anybody tell me how to reorg a VSAM KSDS dataset. Any sample JCL would great..
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expat

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Joined: 14 Mar 2007
Posts: 8620
Location: Back in jolly old England

PostPosted: Thu May 03, 2007 4:36 pm    Post subject:
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IDCAMS - either EXPORT, DEL/DEF Cluster, IMPORT
or
REPRO to flat file, DEL/DEF Cluster, REPRO back from flat file to KSDS

What criteria are you basing your reorg on, Number of extents or number of C/CA splits. Also, what RAID level are your DASD subsystem ?

For RAID6 there is absolutely no benefit in reorging for performance reasons because RAID6 works completely different from RAID5.
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