[Tutor] aBSOLUTE BEGINNER

[Abhishek Negi]

Hi all thanks for your help guys...I ll explain my condition, I am an
application programmer doing maintenance and enhancement work basically on
CICS and a little bit in DB2....i had been working patiently on JCL and
learn COBOL but haven't learn REXX.....but the problem is that whenever i
want to do something as per my wish the mainframe server discards the change
as it is a  client server which i am working on so very few option to test
and try and also i am using my PC to read texts on the fix procedures used
in the programming can't use mainframe environment on home desktop and i
want to do something good...

i learn C and C++ but m not a master of it.....I chose python through
articles and recommendation from my friends who is unable to help me  with
tutorials as he working on it a long time ago....i think u all started at
some time of your life as a beginner please consider me that for python but
not for programming.

On 10/18/07, Alan Gauld <alan.gauld at btinternet.com> wrote:
>
> "bhaaluu" <bhaaluu at gmail.com> wrote
>
> > What does that mean... "mainframe technology"?
>
> I'll take a guess at what it means.
> A true mainframe is usually one of (or a clone of) IBM
> or ICLmainframe hardware running an OS like OS/390. It is
> primarily used for large volume data crunching and the
> applications use text only screens such as 3270 terminals
> running LU6.2 protocol. LU6.2 is somewhat like CGI
> on the web(*). A user is presented with a form which they
> fill in and submit as a job to the mainframe. The job
> executes and presents the results in the shape of
> another form. The coordination between transactions
> is managed by a system such as IBM's CICS.
>
> (*)I've often thought a mainframe wouldmake the ultimate
> web server, but sadly I'll never find out as web apps are
> usually considered far too trivial to waste a mainframe on...
>
> For the programmer or 'operator'(sys admin) the system
> involves a lot of small executables (programs) each
> wrapped up as a "job" in a script written in JCL
> (Job Control Language) which will define how much
> memory should be allocated, when the job should start,
> when it should terminate (regardless of whether it has
> finished), its schedulling priority, and so on.
>
> Any scripting in the python sense tends to be done
> using REXX, but it still needs to be wrapped in JCL.
> Everything is a job on a mainframe.
>
> Mainframe people tend to regard Unix boxes in the
> same way Unix guys regard PCs - little more than
> grown up toys. Mainframes hardly ever fail, they run
> the world's top businesses. But they are expensive,
> they are used for data centric rathger than user-centric
> applications and so many people working on them
> find them a tad dull, or boring... I know I spent a very
> instructive year wotking on a mainframe project.
> I'm glad I did it, I learned a lot about writing super
> reliable programs , but I don't want to do another
> one - ever!
>
> Now I may be assuming too much but I'm guerssing
> that's what the OP is referring to.
>
> > Python is anything but boring! I doubt we can help you!
>
> Well, Python is much more fun than either REXX or JCL so
> learning Python may well bring some light relief.
>
> Alan G.
>
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>



-- 
take care
bye
Abhishek Negi
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