Mainframe, MVS and zOS Discussion

This is a question I could not fully answer. It had two parts.In first part, interviewer asked me if we can submit a job using COBOL program? And in second I was asked if we can do the same using CICS program too? 

The further question was, what is the way of doing these two?

For COBOL, I replied that we can execute a Job using the utility INTRDR. But I had nothad any idea about running a JCL from CICS. Can we do that, please tell me?

 For CICS, if a TD queue is defined pointing to the internal reader you can write JCL statements to it.

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Niketan wrote:For COBOL, I replied that we can execute a Job using the utility INTRDR. But I had nothad any idea about running a JCL from CICS. Can we do that, please tell me?

Just being nitpicky - INTRDR should not be called 'utility' ...or should it be?

The z/OS JES Application Programming manual refers to it as a "logical device".  I don't think it can really be called a utility since utilities are executable programs and a logical device is not an executable program.

Thanks Robert. It's always fun to have you around! Appreciate your time!

Robert Sample wrote: For CICS, if a TD queue is defined pointing to the internal reader you can write JCL statements to it.

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Thanks Robert. Can TSQ also be used for the same purpose?

Anuj Dhawan wrote:

Niketan wrote:For COBOL, I replied that we can execute a Job using the utility INTRDR. But I had nothad any idea about running a JCL from CICS. Can we do that, please tell me?

Just being nitpicky - INTRDR should not be called 'utility' ...or should it be?

The z/OS JES Application Programming manual refers to it as a "logical device".  I don't think it can really be called a utility since utilities are executable programs and a logical device is not an executable program.

Thanks guys, have not thought it like that.

Can TSQ also be used for the same purpose?

No.  A temporary storage queue points to a location in memory -- either main memory or auxiliary memory.  A transient data queue points to a DD name that CICS manages; that DD name is usually DD SYSOUT=(A,INTRDR) to allow internal reader job submission from within CICS.  You could also use EXEC CICS SPOOLOPEN / EXEC CICS SPOOLWRITE / EXEC CICS SPOOLCLOSE to write directly to the JES spool, assuming you're using a reasonably recent version of CICS.

Robert Sample wrote:

Can TSQ also be used for the same purpose?

No.  A temporary storage queue points to a location in memory -- either main memory or auxiliary memory.  A transient data queue points to a DD name that CICS manages; that DD name is usually DD SYSOUT=(A,INTRDR) to allow internal reader job submission from within CICS.  You could also use EXEC CICS SPOOLOPEN / EXEC CICS SPOOLWRITE / EXEC CICS SPOOLCLOSE to write directly to the JES spool, assuming you're using a reasonably recent version of CICS.

Thanks for the explnation. It is really helpful.