RE: Fast Copy File

["Rubino, Jim" <Jim.Rubino@xxxxxxxx>]

We have JDE files here and we refresh our data files from out Production
iSeries to out Test/Dev iSeries using the SAVRSTOBJ command and it seems
to work ok.  Our Refresh takes about 4-6 hours, we do not do the big
files every weekend, like the 0911 or 0411 or 0311.

Jim

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of sjl
Sent: Wednesday, November 12, 2008 2:12 PM
To: midrange-l@xxxxxxxxxxxx
Subject: Fast Copy File

All -

We were having difficulties when refreshing data libraries in our test
environments due to the long time it was taking to rebuild the logical
files over the physical files.

I determined that it was much more efficient to first /remove/ the LF
members from the logical files in the to-library /before/ doing the CPYF
command, then submitting jobs to add back the LF members once the PF was
copied - thus was born a new command I call FASTCPYF.

The underlying CPP for this command does the following:

1) DSPDBR of the PF in the to-library to an outfile to capture all of
the logical files that are dependent on the PF in the to-library
2) DSPFD of the PF in the to-library TYPE(*TRG) to an outfile to capture
any triggers on the file in the to-library
3) Removes all of the LF members from the PF in the to-library
4) Removes all of the triggers from the PF in the to-library
5) Uses CPYF to copy the from-file to the to-file
6) Using the information from DSPDBR, submits jobs to add back all of
the logical file members to the PF in the to-library
7) Using the information from DSPFD TYPE(*TRG), adds back all of the
triggers to the PF in the to-library

Have I missed anything?

> From my preliminary testing on a physical file that has a lot of 
> logical
files, FASTCPYF can be 10 times faster than CPYF...

- sjl
 


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