Portal | Manuals | References | Downloads | Info | Programs | JCLs | Mainframe wiki | Quick Ref
IBM Mainframe Computers Forums Index
 
Register
 
IBM Mainframe Computers Forums Index Mainframe: Search IBM Mainframe Forum: FAQ Memberlist Profile Log in to check your private messages Log in
 
Diff. between JES2 and JES3

 
Post new topic   Reply to topic    IBMMAINFRAMES.com Support Forums -> Mainframe Interview Questions
View previous topic :: :: View next topic  
Author Message
karthi_ind

Active User


Joined: 24 Feb 2004
Posts: 131
Location: Chennai

PostPosted: Tue Jun 15, 2004 9:14 pm    Post subject: Diff. between JES2 and JES3
Reply with quote

hi to all


My questions are

1) What is the use of SYSUDUMP, SYSABEND, SYSLIB AND SYSLIN ?

2) Diff. between SYSOUT AND SYSPRINT ?

3) Whatz the use of Typrun=Scan/hold in realtime (give example)?

4) Diff. between JES2 and JES3 ?

5) Whatz the use of SMS ?
Back to top
View user's profile Send private message

superk

Moderator Team Head


Joined: 26 Apr 2004
Posts: 4650
Location: Raleigh, NC, USA

PostPosted: Tue Jun 15, 2004 11:33 pm    Post subject: Re: JCL questions
Reply with quote

Quote:

1) What is the use of SYSUDUMP, SYSABEND, SYSLIB AND SYSLIN ?


JCL Reference for SYSUDUMP and SYSABEND: http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/IEA2B631/13.6?DT=20030423085347

Programming Guide Reference for SYSLIB and SYSLIN (these terms are only relevent to programming, not to JCL): http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/IGY3PG00/2.1.4.3?DT=20011203125201

Quote:

2) Diff. between SYSOUT AND SYSPRINT ?

SYSOUT is one of the positional parameters for a DD (Data Definition) statement in the JCL. SYSOUT data is usually directed for either printing or for capture by an archiving utility or the JES spool:
Code:
//REPORT DD SYSOUT=(A,,FORM)

SYSPRINT is a common DD name which may or may not be required, depending on the program used:
Code:
//SYSPRINT DD SYSOUT=*


Quote:

3) Whatz the use of Typrun=Scan/hold in realtime (give example)?

TYPRUN is not normally used. Check the JCL Reference Guide for descriptions and usage.

Quote:

4) Diff. between JES2 and JES3 ?

An Internet search will yield quite a bit of information. Here is just one example: http://www.mcg-software.dk/pdf/ejes3.pdf

Quote:

5) Whatz the use of SMS

System Managed Storage. Again, plenty of information is available if you perform a search. Here is one such document: http://www.system.missouri.edu/itss/ss/sms/smdoc1.html
Back to top
View user's profile Send private message
vishwanthini

New User


Joined: 15 Oct 2006
Posts: 6
Location: Mooresville,NC-USA

PostPosted: Sun Oct 15, 2006 12:22 am    Post subject: Re: JCL questions
Reply with quote

The difference between the JES2 and JES3 is as below
JES2 processing is considered to be independently controlled. Each
JES2 image processes its own job input, job scheduling and job output.
JES2 uses a contention-based paradigm for managing a multi-image
workload. Each image ?wakes up? periodically and attempts to serialize
the JES2 checkpoint using a hardware serialization technique. The image
that succeeds carries out job and output scheduling activities. The others
go back ?to sleep? waiting for another chance. There is no cooperative
decision-making process. The order in which activities occur and on
which images is random.
By contrast, JES3 processing is considered to be centrally controlled.
One image is designated as the focal point for the entry and distribution
of jobs and for the control of resources needed by the jobs. That image,
called the global processor, distributes work to itself and the other images
in the configuration, known as local processors. It is from the global
processor that JES3 manages jobs and resources for the entire JESplex,
matching jobs with available resources. JES3 manages processors
(images), I/O devices, volumes, and data. To avoid delays that result
when these resources are not available, JES3 ensures that they are
available before selecting the job for processing. Using this centralized
approach, JES3 can make informed and complex decisions about job
scheduling and placement.
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 -> Mainframe Interview Questions All times are GMT + 6 Hours
Page 1 of 1

 

Search our Forum:

Similar Topics
Topic Author Forum Replies Posted
No new posts JES2 job size field matching Windows ... SRICOBSAS All Other Mainframe Topics 4 Tue Sep 05, 2017 5:49 pm
No new posts JES2 doesn't honor the priority of th... Aron Lendvai JCL & VSAM 8 Thu Jun 29, 2017 1:41 pm
No new posts JES2 JEC: Use UNIX Pipes to Pass Data... Virendra Shambharkar JCL & VSAM 21 Tue Dec 20, 2016 6:55 pm
No new posts How to download JES2 JOB LOG? White.Bai JCL & VSAM 9 Thu Sep 29, 2016 7:34 am
No new posts Compare PD Values with same storage &... Shrinika Rajendran JCL & VSAM 5 Wed Nov 05, 2014 3:17 pm

Facebook
Back to Top
 
Job Vacancies | Forum Rules | Bookmarks | Subscriptions | FAQ | Polls | Contact Us