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TechTip: Programmatically Changing All the Files in a Library

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Q: We are running JD Edwards here and upgrading to V5R2 this weekend. One
problem that JDE has is performance issues related to some new values. It seems
that there can large performance hits if the logical files are not changed
as shown:

CHGLF FILE(F0003LA) ACCPTHSIZ(*MAX1TB)

Well, there are at least 300 (out of 1000's) logicals that I should do this for immediately. Is there a different way to submit this command so to change/update more than one file at a time? Using the keyword FILE(F0003*) does not work.

A: Use a command to create a list in a physical file:

DSPOBJD OBJ(JDELIB/*ALL) OBJTYPE(*FILE) OUTPUT(*OUTFILE)

Then use RCVF in a CL to read the records. Process only those record with ODOBAT = 'LF'. To process them sequentially, just do a CHGLF in the CL. If you want them to execute simultaneously, submit the CHGLF to a job queue and set MAXJOBS for the number you want to execute at once.
Joe Pluta is the founder and chief architect of Pluta Brothers Design, Inc. He has been working in the field since the late 1970s and has made a career of extending the IBM midrange, starting back in the days of the IBM System/3. Joe has extensive experience in Web application design and specifically IBM’s WebSphere, especially as the base for PSC/400, the only product that can move your legacy systems to the Web using simple green-screen commands. Joe is also the author of E-Deployment: The Fastest Path to the Web and Eclipse: Step by Step. You can reach him at This email address is being protected from spambots. You need JavaScript enabled to view it..
Joe Pluta

Joe Pluta is the founder and chief architect of Pluta Brothers Design, Inc. He has been extending the IBM midrange since the days of the IBM System/3. Joe uses WebSphere extensively, especially as the base for PSC/400, the only product that can move your legacy systems to the Web using simple green-screen commands. He has written several books, including Developing Web 2.0 Applications with EGL for IBM i, E-Deployment: The Fastest Path to the Web, Eclipse: Step by Step, and WDSC: Step by Step. Joe performs onsite mentoring and speaks at user groups around the country. You can reach him at This email address is being protected from spambots. You need JavaScript enabled to view it..

MC Press books written by Joe Pluta available now on the MC Press Bookstore.

Developing Web 2.0 Applications with EGL for IBM i Developing Web 2.0 Applications with EGL for IBM i
Joe Pluta introduces you to EGL Rich UI and IBM’s Rational Developer for the IBM i platform.
List Price $39.95

Now On Sale

WDSC: Step by Step WDSC: Step by Step
Discover incredibly powerful WDSC with this easy-to-understand yet thorough introduction.
List Price $74.95

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Eclipse: Step by Step Eclipse: Step by Step
Quickly get up to speed and productivity using Eclipse.
List Price $59.00

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