Most efficient copy utility

mark loftus · New User Joined: 21 Jun 2006 Posts: 5

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.

enrico-sorichetti

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

dick scherrer · Posted: Sat May 24, 2008 12:35 am Post subject:

Hello,

Bill Dennis · Posted: Sat May 24, 2008 1:40 am Post subject:

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.

dick scherrer · Posted: Sat May 24, 2008 1:57 am Post subject:

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.

Douglas Wilder · Posted: Sat May 24, 2008 2:34 am Post subject:

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

gcicchet · Senior Member Joined: 28 Jul 2006 Posts: 438

Hi,

see this linkhttp://ibmmainframes.com/viewtopic.php?t=25928&highlight=gerry+iebgener+idcams

Gerry

Terry Heinze · Posted: Tue Jul 15, 2008 3:16 am Post subject:

I've read a lot of discussions of this over the years and the general consensus is that SORT (whether it be DFSORT, Syncsort, or CA-Sort) usually outperforms the rest. As enrico suggested, give them all a try and report back.