Common MVS System Address Spaces

The following table lists some of the most common MVS system address spaces: Adress Space Description ANTAS000 Concurrent Copy Support ANTMAIN Concurrent Copy support BPXOINIT USS Address Space initiators CATALOG Catalog Address Space – Handles DISP=SHR, DISP=OLD, and DISP=(…,CATLG) CONSOLE Console Task – operator’s interface DLF Data Look aside Facility […]


JCL to Clear SMF Datasets

Here’s a simple example of a batch job to clear the content of your SMF datasets: //SMFDP EXEC PGM=IFASMFDP //INDD1 DD DISP=SHR,DSN=SYS1.MAN1 //INDD2 DD DISP=SHR,DSN=SYS1.MAN2 //INDD3 DD DISP=SHR,DSN=SYS1.MAN3 //SYSPRINT DD SYSOUT=* //SYSIN DD * INDD(INDD1,OPTIONS(CLEAR)) INDD(INDD2,OPTIONS(CLEAR)) INDD(INDD3,OPTIONS(CLEAR)) Explanation: INDDx – are the DD cards that specify the SMF datasets. SYS1.MANx […]


Create a New SMF Dataset

It’s not uncommon to be faced with the situation where one of our z/OS mainframe systems requires an extra SMF (System Management Facility) dataset in order to avoid losing any SMF data to be recorded. To create a new SMF dataset we rely on the use of the DEFINE command […]

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What is System Management Facility (SMF)

System Management Facility (SMF) is an IBM z/OS mainframe component that collects and records system and job-related information that can be used to: Bill users/customers Analyse system configuration Maintain system security Summarise DASD volume activity Evaluate dataset activity Profile system resource use Schedule jobs Produce reliability reports   SMF formats […]