Tech – Mainframe – Page 15

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[ 2nd November 2026 ] Useful RACF, ACF2 and Top Secret Commands for Security Administrators RACF
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[ 19th October 2026 ] When AI Meets RACF: Can an Authorised Identity Become a Security Risk? RACF
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Delete content of a sequential dataset using IDCAMS

31st July 2014 Rui Miguel Feio

The following JCL will delete the content of a sequential dataset without deleting it using the IDCAMS utility: //DELCONT EXEC PGM=IDCAMS //DDDMMY DD DUMMY //DDOUT DD DISP=SHR,DSN=USER1.MYDATA.EXAMPLE //SYSPRINT DD SYSOUT=* //SYSOUT DD SYSOUT=* //SYSIN DD * REPRO IFILE(DDDMMY) OFILE(DDOUT) Replace USER1.MYDATA.EXAMPLE by the sequential dataset you wish to delete […]

Copy content of one Dataset into another using IEBCOPY

31st July 2014 Rui Miguel Feio

The following JCL will allow you to copy the content of one dataset into another via batch job: //COPY EXEC PGM=IEBCOPY //SYSPRINT DD SYSOUT=* //IN DD DISP=SHR,DSN=USER1.MYDATA.EXAMPLE //OUT DD DISP=SHR,DSN=USER2.MYDATA.FORYOU //SYSIN DD * COPY INDD=IN,OUTDD=OUT Replace USER1.MYDATA.EXAMPLE and USER2.MYDATA.FORYOU by your own dataset names.

Create a New SMF Dataset

21st March 2014 Rui Miguel Feio

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 […]

What is System Management Facility (SMF)

18th March 2014 Rui Miguel Feio

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 […]

How to Allocate a Page Dataset

14th March 2014 Rui Miguel Feio

Here’s a simple way to allocate a new Page Dataset via batch job: //DEFPGSPC EXEC PGM=IDCAMS //SYSPRINT DD SYSOUT=* //SYSIN DD * DEFINE PAGESPACE ( – NAME(page_dataset_name) – CYLINDERS(number_cyls) – VOLUME(volume_name)) Substitute the following values on the above JCL to meet your requirements: page_dataset_name – Name of the Page […]