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Prosenjit001
New User
Joined: 02 Nov 2011 Posts: 14 Location: India
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I am deleing with few jobs .. where lots of back and restore steps are present . Backup steps takes backup from VSAM to tape dataset and restore steps restore it from TAPE to VSAM .
Most of these steps are using IDCAMS , few are using IEBGENER or SORT .
All these steps are taking huge time to run .
Is the any other utility by which I can replace them inorder to increase the job effiency . |
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Garry Carroll
Senior Member
Joined: 08 May 2006 Posts: 1193 Location: Dublin, Ireland
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You might try using ADRDSSU to dump these to tape.
Garry. |
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vasanthz
Global Moderator
Joined: 28 Aug 2007 Posts: 1742 Location: Tirupur, India
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Best is that you yourself have to run a test among the choices you have to determine which is effecient.
I once tested SORT,IDCAMS,IEBGENER,INSYNC,FILE MANAGER,ADRDSSU , at that time SORT was slightly faster than others.. It was only a crude analysis with EXCP, TCB & SRB values. |
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dbzTHEdinosauer
Global Moderator
Joined: 20 Oct 2006 Posts: 6966 Location: porcelain throne
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they are all efficient.
are you looking for a utility that takes less elapsed time? |
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expat
Global Moderator
Joined: 14 Mar 2007 Posts: 8797 Location: Welsh Wales
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I'd probably go with Garry's suggestion as everything can be managed in one single DUMP step.
Also the product has great filtering capabilities.
Are you running a backup and restore as a matter of course. If so, why ? |
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Prosenjit001
New User
Joined: 02 Nov 2011 Posts: 14 Location: India
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Thanks , let my try with ADRDSSU |
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Ronald Burr
Active User
Joined: 22 Oct 2009 Posts: 293 Location: U.S.A.
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If you are currently doing a copy from VSAM to backup, followed by a delete/define of the VSAM file, followed by a copy from the backup in to the newly defined VSAM dataset, then I would suggest using the SORT product, not ADRDSSU.
A copyout/delete/define/copyin sequence will effectively re-org a VSAM KSDS dataset (e.g. eliminate CA/CI splits, reset free space); An ADRDSSU backup/restore will NOT perform such a re-org - it will restore the dataset just as it was before it was backed up. |
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expat
Global Moderator
Joined: 14 Mar 2007 Posts: 8797 Location: Welsh Wales
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Ronald, I think if you use logical rather than physical dump, then the reorg will occur on restore. |
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Ronald Burr
Active User
Joined: 22 Oct 2009 Posts: 293 Location: U.S.A.
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True, but if the current process includes a DELETE/DEFINE between the backup and restore, then there would be a problem using ADRDSSU in the restore step, since no pre-allocation is required/supported by an ADRDSSU restore. The delete/define step was one of the "assumptions" in my IF...then... cautions. |
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