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mark loftus
New User
Joined: 21 Jun 2006
Posts: 5
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| I would like to try to establish what is the most cpu efficient way of copying a DSN through batch. If anyone has already done any research on this i would be very interested in the results. A league table of results would be very useful. |
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References
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 Posted: Fri May 23, 2008 7:53 pm Post subject: Re: Most efficient copy utility |
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enrico-sorichetti
Global Moderator
Joined: 14 Mar 2007
Posts: 2291
Location: italy
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Well said, Give it a try and let us know...
program/utilities to test
- IDCAMS
- IEBGENER
- ICEGENER
- DFDSS
- RYO assembler ( excp level )
run with different blocksizes, different lrecls
post the results |
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dick scherrer
Global Moderator
Joined: 23 Nov 2006
Posts: 6725
Location: 221 B Baker St
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Hello,
| Quote: |
| what is the most cpu efficient way of copying a DSN through batch |
Usually, cpu usage is not an issue when copying data. The process is nearly always i/o bound. . . |
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Bill Dennis
Active User
Joined: 17 Aug 2007
Posts: 149
Location: Iowa, USA
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| When comparing to IEBGENER and RYO, we found ICEGENER to be the least CPU and lowest EXCP counts for larger file sizes but it was slightly worse than RYO for very small files. |
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dick scherrer
Global Moderator
Joined: 23 Nov 2006
Posts: 6725
Location: 221 B Baker St
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Hello,
ICEGENER invokes the sort.
On many systems, IEBGENER executions are intercepted and sort/copy is used instead of GENER.
The sort products (DFSORT & Syncsort) have more "start-up" costs, but more than make up for it when processing anything other than small files. |
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Douglas Wilder
Active User
Joined: 28 Nov 2006
Posts: 173
Location: Deerfield IL
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In very limited testing of copying PS files My results of relative cost at this shop were:
Repro 1.0 Gener 1.63 SrchPrnt .99 DF Sort .39 |
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gcicchet
Active User
Joined: 28 Jul 2006
Posts: 295
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