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Any tuning options for IEBGENER or any replacement?


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vijikesavan

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Joined: 04 Oct 2006
Posts: 118
Location: NJ, USA

PostPosted: Mon Sep 17, 2007 11:02 pm
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Hi,
I have a JCL which converts huge Tape datasets to DASD using IEBGENER.
The job uses lots of CPU as well as elapsed time.
Is there any other utility to use instead of IEBGENER? will sort or IDCAMS are good enuf in terms of reducing the CPU?

Any pointers will be of great help.
Thanks,
Viji
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Frank Yaeger

DFSORT Developer


Joined: 15 Feb 2005
Posts: 7129
Location: San Jose, CA

PostPosted: Mon Sep 17, 2007 11:25 pm
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Quote:
will sort or IDCAMS are good enuf in terms of reducing the CPU?


The only way to find out for sure is to try it yourself and compare. If you have DFSORT, you can just change PGM=IEBGENER to PGM=ICEGENER to use DFSORT's ICEGENER.
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krisprems

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Joined: 27 Nov 2006
Posts: 649
Location: India

PostPosted: Tue Sep 18, 2007 1:40 pm
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vijikesavan

You can know about Performance
Features of ICEGENER here http://publibz.boulder.ibm.com/epubs/pdf/ice1ct00.pdf
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Frank Yaeger

DFSORT Developer


Joined: 15 Feb 2005
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Location: San Jose, CA

PostPosted: Tue Sep 18, 2007 9:48 pm
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Krisprems,

The DFSORT Tuning Guide you referenced has general information about performance, but there are many "variables". As I said, the only sure way to determine performance for a specific situation is to do a comparison for that specific situation.
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ofer71

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Joined: 27 Dec 2005
Posts: 2358
Location: Israel

PostPosted: Wed Sep 19, 2007 12:23 am
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Frank -

The numbers regarding IEBGENER vs. ICEGENER from the tuning guide seem very definitive and convincing... I was pretty amazed, even without testing.

O.
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Frank Yaeger

DFSORT Developer


Joined: 15 Feb 2005
Posts: 7129
Location: San Jose, CA

PostPosted: Wed Sep 19, 2007 1:00 am
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Again, those results were obtained for a particular situation. See the caveat at:

publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/ICE1CT00/PREFACE.7?DT=20031124135012

It's certainly true that DFSORT's ICEGENER will do quite well in many situations. I'd be the last person to "knock" DFSORT's ICEGENER in any way (I developed the front end to DFSORT Copy for it). I'm just trying to indicate that as always your mileage may vary, and the only way to know for sure is to try it for a given situation.
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Bitneuker

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Joined: 07 Nov 2005
Posts: 1104
Location: The Netherlands at Hole 19

PostPosted: Wed Sep 19, 2007 4:24 am
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Quote:
will sort or IDCAMS are good enuf in terms of reducing the CPU?


Did you try IDCAMS?
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