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Optimize sort inrec parse


IBM Mainframe Forums -> DFSORT/ICETOOL
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vishwakotin

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Joined: 15 Mar 2017
Posts: 9
Location: India

PostPosted: Mon Jun 26, 2017 11:15 pm
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Hi,

I have sort job which uses inrec parse to convert cab format file into fixed length. But the job is taking about 10.5 CPU.

I am looking at any other way to parse it with less cpu, also does cobol program will be faster in these cases?

Please let me know.

Thanks,
Vishwa
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Robert Sample

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Joined: 06 Jun 2008
Posts: 8569
Location: Dubuque, Iowa, USA

PostPosted: Mon Jun 26, 2017 11:59 pm
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Looking at your post raises several questions:
1. 10.5 CPU -- what? Is this CPU seconds? CPU minutes? Some random measurement you didn't specify for us?
2. How many records are being reformatted?
3. It is unlikely that you are going to be able to improve upon SORT performance -- SORT is already highly optimized.
4. COBOL is not likely to improve upon SORT performance, either.
5. Parsing ANYTHING tends to be a CPU-intensive process.
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Rohit Umarjikar

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Joined: 21 Sep 2010
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Location: NYC,USA

PostPosted: Tue Jun 27, 2017 1:21 am
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Quote:
I am looking at any other way to parse it with less cpu, also does cobol program will be faster in these cases?
I assume , you have got all your resources in hand so give a try and check it out yourself. Will you?
Quote:
I have sort job which uses inrec parse to convert cab format file into fixed length. But the job is taking about 10.5 CPU.
It is what it is as its best, nothings exceptional to your case. If it is so many of them to parse, try COBOL.
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vishwakotin

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Joined: 15 Mar 2017
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PostPosted: Tue Jun 27, 2017 7:09 am
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Hi Robert,

The file has 6 million records, that is cpu minutes.

Rohit - I am going to try cobol today and I will update the outcome.

Ta
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Marso

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Joined: 13 Mar 2006
Posts: 1348
Location: Israel

PostPosted: Tue Jun 27, 2017 2:43 pm
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vishwakotin wrote:
...inrec parse to convert cab format file into fixed length...

can we have a look at your INREC statement ?
By "cab format files" do you mean Microsoft cabinet files ?
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sergeyken
Warnings : 2

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Joined: 29 Apr 2008
Posts: 1003

PostPosted: Thu Jun 29, 2017 12:44 am
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vishwakotin wrote:
Hi,

I have sort job which uses inrec parse to convert cab format file into fixed length. But the job is taking about 10.5 CPU.

I am looking at any other way to parse it with less cpu, also does cobol program will be faster in these cases?

Please let me know.

Thanks,
Vishwa

Any sample of your PARSE?

It is unlikely that you can improve the already optimized SORT PARSE performance unless there is some obvious incorrectness in your statement(s)...
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Rohit Umarjikar

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Joined: 21 Sep 2010
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Location: NYC,USA

PostPosted: Fri Jun 30, 2017 8:32 pm
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Quote:
Rohit - I am going to try cobol today and I will update the outcome.
it shouldn't take that long to update or to answer the other questions asked.
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