z/OS technical articles
A practical set of articles for teams working with IBM z/OS.
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Articles in this category
z/OS Return Codes: Mechanics, JCL Flow Control, TMP Behaviour, and Edge Cases
A practical guide to z/OS return codes covering JCL condition handling, TMP entry-point behaviour, ABEND interaction, and edge cases such as values above 4095.
A second look into the z/OS JCL GDGBIAS parameter
A practical article that shows how GDGBIAS=JOB and GDGBIAS=STEP change GDG relative generation resolution across job steps.
JES2 job groups in practice on z/OS
A hands-on lab that defines a JES2 JOBGROUP, associates batch jobs to it with SCHEDULE JOBGROUP=, and validates native multi-job sequencing without an external scheduler.
Native JES2 scheduling controls in the job stream
A hands-on lab that uses the JES2 SCHEDULE statement, HOLDUNTL, and dynamic sequencing with AFTER and DELAY=YES to control individual batch jobs in the job stream.
JCL ABDISPCC in practice on z/OS
A hands-on lab that shows how the EXEC keyword ABDISPCC changes DISP processing when a job step ends normally with an unacceptable return code.