Question

Which JCL command will accomplish a Wait of 3h?

Asked by: krisa3

I have 2 JCL jobs that are submitted one after the other, jobs A and B. I need job B to wait at least 3 hours after accomplishment of job A before executing code. I want to add a new step in job B that will accomplish this. I do not want to create a new program, looking for some kind of JCL that will accomplish this.

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Asked On
2009-08-20 at 01:40:43ID24667417
Tags

JCL

,

MVS

Topic

MainFrame Operating Systems

Participating Experts
1
Points
200
Comments
5

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Answers

 

by: giltjrPosted on 2009-08-20 at 06:08:04ID: 25141983

JCL is not a scripting language and has no "commands".  This is typically accomplished by using a job scheduling package or some type of system automation package.

 

by: krisa3Posted on 2009-08-20 at 07:12:38ID: 25142730

The job scheduling package used is OPC, e.g. I can plan job A at 6h00 AM and job A & job B are part of the same 'chain'.
Job A has a dependancy on other 'chain', so I can not plan job B at 9h AM, because of the dependancy..

In fact the problem is the following : job A is sending its created files to Pelican (you can compare Pelican with ftp if you like), and job A has 'finished' when the sending to Pelican commands are finished. But this doen't mean that Pelican alraedy has transferred those files froom MVS to PC. So in case that those files are big, job B - which archives those big files - allready had deleted those files.

So I wanted to 'delay' the end of job A to be sure that Pelican has finished it's file transfer before job B starts cleaning.

 

by: giltjrPosted on 2009-08-20 at 07:43:10ID: 25143138

Not to sound arrogant, but it sounds like something is messed up in your dependency.  Just because JOB A has a dependency on some other event there should be no reason why JOB B can't be scheduled to run at 9 AM.  However that is not the big issue.

This needs to be handled outside of  OPC or triggered by something outside of the OPC.

If Pelican can do it, have it submit JOB B after the completion of the transfer.

If Pelican can't submit a job after the completion of the transfer, hopefully it issues a WTO apon the completion of the transfer.

We use IBM's NetView FTP (NFTP) and it has the same type of process.  You submit a job to do a file transfer, but that job just schedules a request with the NFTP queue handler.  The transfer may start right away and take only a few seconds to complete, or it could end up starting in 10 minutes and take 8 hours to finish.  NFTP issues a WTO at the start and finish of the transfer.  We have automation setup in IBM's NetView that monitors for the WTO issued at the completion of the transfer and if we need to do any post processing, it is trigger from the automation.

I have not used OPC, but I'm 99% sure that OPC could be used to monitor for any "transfer complete" message that Pelican issues.

 

by: krisa3Posted on 2009-08-29 at 13:38:18ID: 25215281

Finally I took the following solution :
Job A copies twice the files (lets say filesX and filesY, which are identical), and sends only filesX to Pelican, while Job B saves & deletes only filesY.
The filesX will only be deleted automaticaly after a few days (through cleaning jobs).

So no need of triggering communication between Pelican & OPC

 

by: giltjrPosted on 2009-08-29 at 18:55:42ID: 25216129

Thank you for the assist.

However, why don't you just have JOB B do a backup/archive and leave the file alone?  Then after a few days it will be cleaned up.

20120131-EE-VQP-002

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