zMainframes

Technically strong mainframe engineers still fail interviews. It’s rarely about COBOL syntax. It’s about: - Operational judgment - Failure impact reasoning - Workload awareness Enterprise systems reward consequence modeling. 🎧 youtube.com/watch?v=uDWk1ujx… #Mainframe #IBMZ

Streaming IMS data to a cloud lake while IMS stays SoR — how to keep it ‘near real-time’? zmainframes.com/viewtopic.ph…

One PROC used by dozens of jobs — best pattern to pass job-specific parms? zmainframes.com/viewtopic.ph…

KSDS sizing: picking CI/CA for ~337M records — rules of thumb? zmainframes.com/viewtopic.ph…

Calling a REST API from REXX on z/OS zmainframes.com/viewtopic.ph…

DB2 batch SELECT taking too long zmainframes.com/viewtopic.ph…

Handling legacy binary files in COBOL zmainframes.com/viewtopic.ph…

CICS transaction timeout tuning zmainframes.com/viewtopic.ph…

Variable‑length records in VSAM KSDS zmainframes.com/viewtopic.ph…

Tools for testing in mainframes zmainframes.com/viewtopic.ph…

COMP vs COMP‑3 arithmetic surprises zmainframes.com/viewtopic.ph…

Debugging CICS with limited test data zmainframes.com/viewtopic.ph…

Lightweight metrics in COBOL zmainframes.com/viewtopic.ph…

REXX EXECIO vs LINEIN — when is EXECIO faster? zmainframes.com/viewtopic.ph…

speculation about interfacing REST API from rexx zmainframes.com/viewtopic.ph…

Change PD to PD. zmainframes.com/viewtopic.ph…

Where do you live? zmainframes.com/viewtopic.ph…

space increment in JCL is not working. zmainframes.com/viewtopic.ph…

Restarting career. zmainframes.com/viewtopic.ph…

convert data from zoned decimal to packed decimal zmainframes.com/viewtopic.ph…