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Most efficient copy utility?

 
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new2cobol

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Joined: 04 Jan 2006
Posts: 77
Location: Bangalore

PostPosted: Wed Jan 14, 2009 1:51 pm    Post subject:
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My experiance with DFSORT and SYNCSORT says DFSORT is better and faster. Not sure whether it is cheaper...

How ever, please use SORT options when you are talking of records numbering in millions. IEBCOPY should be a better option for small files, I guess.
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enrico-sorichetti

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Joined: 14 Mar 2007
Posts: 10210
Location: italy

PostPosted: Wed Jan 14, 2009 1:55 pm    Post subject: Reply to: Most efficient copy utility
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Quote:
IEBCOPY should be a better option for small files, I guess.

look at the manual to find out why IEBCOPY cannot be used icon_biggrin.gif
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Anuj Dhawan

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Joined: 22 Apr 2006
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Location: Mumbai, India

PostPosted: Wed Jan 14, 2009 4:48 pm    Post subject:
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Hi,

My experience differ a little in this regard - I've an in house utility (MULTIGEN) used for this purpose, surprgingly for in-house left others behind. Below are the statistics of a copy operation with differnt utilites done recently:
Code:
For Records : 5,02,922  Utility : Multigen      CPU Time : $0.10     
For Records : 5,02,922  Utility : IEBGENER      CPU Time : $0.14
For Records : 5,02,922  Utility : SORT          CPU Time : $0.13     
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dick scherrer

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Joined: 23 Nov 2006
Posts: 19270
Location: Inside the Matrix

PostPosted: Wed Jan 14, 2009 11:14 pm    Post subject:
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Hello,

It is important to note that cpu time is not the issue when copying files. If an organization wants to measure how "good" a copy process is by using cpu time they are making a huge mistake. As was posted, even the biggest user uses almost none.

The big issue with measuring a copy process is how much i/o does it do and how well is the i/o done.

Another consideration is whether the copy is for "a file" or if it is a backup of many files. For many files, suggest dfdss, fdr, or something similar be considered as they are designed for high-volume backup/restore.
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jaspal

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Joined: 22 May 2007
Posts: 68
Location: mumbai

PostPosted: Tue Feb 24, 2009 10:43 am    Post subject:
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Hi Anuj D ,

MULTIGEN is faster and consume less CPU time when copying data
from one dataset to other.
In our shop we generally use multigen ,sort and IDCAMs , if there are no
calculation ( i.e sorting) we use MULTIGEN for taking backup etc.

Thanks,
Jaspal
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Debabrata Pruseth

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Joined: 11 Dec 2008
Posts: 59
Location: Pune , India

PostPosted: Thu Feb 26, 2009 3:46 am    Post subject:
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Hi Mark

This below Forum thread also has some good information.

---> http://www.ibmmainframes.com/viewtopic.php?t=37467&postdays=0&postorder=asc&start=15
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