Portal | Manuals | References | Downloads | Info | Programs | JCLs | Master the Mainframes
IBM Mainframe Computers Forums Index
IBM Mainframe Computers Forums Index Mainframe: Search IBM Mainframe Forum: FAQ Memberlist Usergroups Profile Log in to check your private messages Log in


Explain clearly about INTRDR in DD statement

Post new topic   Reply to topic    IBMMAINFRAMES.com Support Forums -> JCL & VSAM
View previous topic :: :: View next topic  
Author Message
Warnings : 1

New User

Joined: 14 Mar 2005
Posts: 10
Location: pune

PostPosted: Mon May 23, 2005 8:50 pm    Post subject: Explain clearly about INTRDR in DD statement
Reply with quote


// REGION=4096K

in this job, the jobs job1,job2 and job3 will execute simultaneously or one after another.

2)issuing jes2 and jes3 commands means, where we have to issue these jes2 and jes3 commands. please clarify in this in brief.

3)any body can explain clearly about intrdr in dd statement. i mean about internal reader in jcl.

adv thanks,
Back to top
View user's profile Send private message


Active User

Joined: 10 Mar 2005
Posts: 432
Location: Milan, Italy

PostPosted: Mon May 23, 2005 10:06 pm    Post subject:
Reply with quote

1) The jobs will executed simultaneously and the first that will run before the other is the less complex for the initiator.

2) wow.... I think that JES2 and JES3 are not as easy to explain as you
can think... It is a subsystem of MVS(Job Entry Subsistem) and allow to operator or the application programmer to manage all the request that, with a job or with some online command, we are asking to the system.
In particular you must know that JES manage all the submit and give us the priority(in fact it is also a scheduler), manage the resource that we need, manage our stepjob and check its correctness, and manage the remote message and operation that you ask to the network.
Mainly, learning JCL you study its five control steps that are:


And all this five steps are processed from one function of JES that's Internal Reader or Reader.

For this explaination, for the question above, the order depend of the time that your jcl spend in the first step(Input) and the second(Conversion).

3) I think that this question is answered above...

I'm sorry for my poor english in my explanation but I assure you that is my best... icon_redface.gif
Back to top
View user's profile Send private message

Moderator Team Head

Joined: 26 Apr 2004
Posts: 4648
Location: Raleigh, NC, USA

PostPosted: Tue May 24, 2005 2:10 am    Post subject: Re: Explain clearly about INTRDR in DD statement
Reply with quote

3. In the "old" days, all JCL, as well as most original data, used to be punched onto 80-column cards and fed into the mainframe through a card reader. Today, we create JCL using terminals and stage it in libraries. The JCL "reader" is no longer a physical device - but it is "simulated" - and it is called the "internal" reader. Putting JCL into the "internal" reader is done by coding the output destination for a file to the "internal" reader and writing the desired JCL into it. This is usually done by coding ( for example )

//jobjcl DD SYSOUT=(,INTRDR)

When the dataset is closed and released, the system will "read" and process the contents just as if it were a submitted job.

Here is some more Internal Reader information:

Back to top
View user's profile Send private message
View previous topic :: :: View next topic  
Post new topic   Reply to topic    IBMMAINFRAMES.com Support Forums -> JCL & VSAM All times are GMT + 6 Hours
Page 1 of 1


Search our Forum:

Similar Topics
Topic Author Forum Replies Posted
No new posts -913/-911 Deadlock during UPDATE stat... NoSleep319 DB2 5 Fri Nov 18, 2016 12:37 am
No new posts COBOL DB2 - CALL statement - high CPU... TS70363 DB2 15 Sun Sep 11, 2016 6:07 am
No new posts Converting NULL column into NOT NULL ... Raghu navaikulam DB2 5 Sat Aug 06, 2016 3:45 pm
This topic is locked: you cannot edit posts or make replies. Updating value of key using rewrite s... ParminderKumar COBOL Programming 4 Thu Aug 04, 2016 12:46 am
No new posts Inspect statement spoorni COBOL Programming 5 Mon Jun 06, 2016 9:53 pm

Back to Top
Mainframe Wiki | Forum Rules | Bookmarks | Subscriptions | FAQ | Tutorials | Contact Us