Mainframe, MVS and zOS Discussion

First of all, the dummy syntax is "DD DUMMY" not "DD DSN=DUMMY". Coding "DD DSN=NULLFILE" is essentially the same thing as coding "DD DUMMY", it just takes slightly longer to type!


Thank you for correcting it, understood.

As an output, "DD DUMMY" becomes a null file. It is the equivalent of ...

Could you please explain the differences and advantages of using DSN=DUMMY versus DSN=FILENAME, where FILENAME is an empty sequential dataset and an empty VSAM dataset?Additionally, is there any difference between using DD DUMMY and DD DSN=NULLFILE?This was an interview question, and despite ...

Happy Republic Day!

Thank you for the explanation this really helps. I had been confusing it all over. 

florry372 wrote: Fri Dec 27, 2024 11:33 am or manage the base catalog definitions properly.

Hi,

What is the difference between KEEP and PASS while using in JCL for dispositional parameters. Do they behave same for temp dataset but different for regular dataset?

Hi,

GDG(all)versions copy from production to test any short method is there?

Could someone suggest something?

Thank you. Let me spend some time on this and I'll come back to you.

Hi,

Assume you are tasked with developing a web application that displays currency exchange rates for a bank's website. The exchange rates are stored on an IBM Mainframe and are accessible via web services. Currently, every time a user accesses the rates page, a request is sent to the mainframe ...