Mainframe, MVS and zOS Discussion

For anyone weighing a six month COBOL contract like the one posted here, the useful filters are whether the rate is W2 or corp to corp, whether onsite days in Temple Terrace are fixed, and whether the extension history for that client is real or only possible on paper. Asking for the main toolchain ...

When a program compiles under MFED but fails with IBM Enterprise COBOL, Anuj's list is the efficient order: dialect and compiler options first, then identical copybook versions and SYSLIB order, then source format past column 72. ARITH, TRUNC, NUMPROC, NSYMBOL and SQL or CICS precompile settings are ...

For maintenance windows, the safe pattern Anuj described is finish the current logical unit of work, take a checkpoint that covers both application position and every updated resource, then exit with an agreed return code. Db2 work should checkpoint on COMMIT boundaries with the restart key stored ...

When the same SORT is three minutes one night and thirty the next, Anuj's checklist is the right order: confirm identical input counts and SORT control statements, then compare step CPU versus elapsed, EXCPs, and the SORT messages for memory and SORTWK. Similar CPU with much higher elapsed usually ...

Treating RACF identity and external secrets as separate problems, as Anuj outlined, avoids stuffing passwords into JCL. Scheduler submission under SURROGAT keeps the batch user out of the PROC, while API keys and database passwords belong in a vault with rotation and audit, or in an encrypted file ...

Anuj's split between build deploy test JCL and production batch is the distinction that keeps CI/CD from becoming a second scheduler. Compile, link-edit, bind and regression jobs map cleanly to Jenkins stages; nightly application batch that already runs under Control-M or TWS usually should stay ...

Anuj Dhawan's SMF 30 subtype 4 starting point is the right first cut, because subtype 5 totals can hide which step actually moved. Comparing SMF30CPT and SMF30CPS for the hot step against a normal run with similar input volume, then lining up SMF 70-1 and 72-3 for the same interval, separates a real ...