Re: [open-cobol-list] What do you think of JCL ?

[Vincent Coen]

Hi Patrick;

 

On Thursday 19 Sep 2013 12:24:54 Patrick wrote:

 

I will say this again having considered my prev. response that possibly was a bit long winded:

 

JCL is used to run a job that con consist of one or more processes or programs in a very controlled manner so that the system knows what programs/processes to run and what resorces are needed to do so e.g.,files and where they are in the system (remember M/Fs have a lot of drives both fixed and removable and when I say a lot I mean >10 and in one site I worked at it was in the 100's) what printer to send the output to, what priority to use for the job (very slightly similar to the Linux nice command). and when to run it along with a stack of other details.

 

I would recommend you have a look at the IBM website and read the overview of JCL for more info.

 

 

. but simply put, there is NO need for a another JCL tool in Linux as there are plenty of them already for controlling what and when a process is run and no processes are required to tell an operator to load special paper onto a given printer or to load a drive onto a specific spindle etc.

 

 

 

Vince

 

> Thanks for the feedback everyone

>

> If JCL is designed to solve problems we don't have on the desktop, then

> let me reverse that question.

>

> Would a Guile, Tcl, lua Open Cobol binding solve problems on the

> mainframes normally tackled by JCL and provide an alternative to JCL?

>

> On 09/19/2013 12:06 PM, Brian Tiffin wrote:

> > Patrick; Michael;

> >

> > Take a look at Fossil SCM by Richard Hipp. A subset of Tcl (TH1) is

> > built into the bug tracking feature and for top and bottom banner

> > control of the CGI interface. Pretty cool.

> >

> > Oh, I'l ditto Vince as well. Go with shell and cron and skip JCL on

> > the GNU/Linux side. Or for playing with JCL, (a thing to know, even

> > if it's just "yeah I've seen JCL"), take a look at

> > http://my.opera.com/btiffin/blog/2012/02/27/hercules-os-360-mvt-and-cobol-

> > circa-1972 for instructions on a Hercules MVT setup that you can play

> > with.

> >

> > Cheers,

> > Brian

> >

> > On 9/19/13, Patrick <address@hidden> wrote:

> >> Hi Mike

> >>

> >> "I like your enthusiasm, never loose that!"

> >>

> >> I won't ! , I promise.

> >>

> >> I love Tcl. Basically my favourites are Cobol, Tcl and Ada.

> >>

> >> Have you looked at jim tcl ?

> >>

> >> It's really small.

> >>

> >> This is probably just some more "crack smokin" but I have been day

> >> dreaming about rewriting jim in pure COBOL. Tcl in native cobol would be

> >> neat.

> >>

> >> I have printed all of the source of jim in color and I am also studying

> >> tcl parsers written in tcl to lower the bar to entry.

> >>

> >> Thanks

> >>

> >> On 09/19/2013 10:53 AM, Michael Anderson wrote:

> >>> Patrick,

> >>>

> >>> Although I agree with Vince, I like your enthusiasm, never loose that!

> >>>

> >>> As of lately (the last 5 years), I've been doing migration work,

> >>> migrating HP3000 applications to Windows, Linux and HPUX (Unix). Like

> >>> IBM, HP, specifically the HP3000 has it's own version of JCL.

> >>>

> >>> Many of the programmers I work with jump right into converting the JCL

> >>> to some local scripting language. On windows it would be BAT files or

> >>> Power-hell, on Linux its bash scripts, on HPUX its ksh scripts, and so

> >>> on......

> >>>

> >>> Much of the JCL originated from batch the processing days, then the

> >>> OLTP machines made it more interactive, and on HP MPE/iX platforms it

> >>> grew into a very advanced scripting language. So, for me (to emulate

> >>> the JCL environment) the replacement for Batch/JCL is Tcl. For a

> >>> minute I thought about using NodeJS instead of Tcl. In the end I

> >>> choose Tcl, mostly because I can call "TclEval" directly from Cobol, or

> >>> C.

> >>>

> >>> Converting all JCL to Tcl makes more sense, because the exact same Tcl

> >>> syntax can be used on any of the most popular platforms, including

> >>> Windows, Mac, and all flavours of Unix.

> >>>

> >>> Now with GNU being my platform of choice, and becoming more aligned

> >>> with the Richard Stallman philosophy, I ponder, should I trade Tcl,

> >>> for Guile?

> >>>

> >>> --

> >>> Mike.

> >>>

> >>> On 09/19/2013 08:13 AM, Chris Geldenhuis wrote:

> >>>> On 09/19/2013 02:17 PM, Vincent Coen wrote:

> >>>>> On Wednesday 18 Sep 2013 22:03:06 Patrick wrote:

> >>>>>> After reading one today, it sounds like people invented the scripting

> >>>>>> language I was considering long ago, job control language.

> >>>>>> This sounds like it should be the easiest language to implement, is

> >>>>>> it

> >>>>>> really inconsistent and weird? How could something so simple have

> >>>>>> gone

> >>>>>> wrong.

> >>>>>> Would JCL or something like it be good for open Cobol ?

> >>>>>

> >>>>> JCL is exactly that a Job control system for executing/starting jobs

> >>>>> on a m/f (mainframe) it links any resources needed by a specific

> >>>>> program or group of programs, e.g., files and their access type,

> >>>>> printers etc.

> >>>>>

> >>>>> Yes, some of the commands in it are inconsistent but that is more

> >>>>> the fact that various programmers have coded the new stuff without

> >>>>> sticking to some standards in format etc.

> >>>>>

> >>>>> Under Linux such a process is NOT required as it is all dealt with

> >>>>> inside the existing tools of Linux.

> >>>>>

> >>>>> There is no need for it and more importantly the old saying

> >>>>>

> >>>>> "If it is not broken don't fix it"

> >>>>>

> >>>>> comes seriously to mind.

> >>>>>

> >>>>> It is a wasted exercise.

> >>>>>

> >>>>> Vince

> >>>>

> >>>> +1

> >>>>

> >>>> ChrisG

> >>>>

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> >>>>>

> >>>>> _______________________________________________

> >>>>> open-cobol-list mailing list

> >>>>> address@hidden

> >>>>> https://lists.sourceforge.net/lists/listinfo/open-cobol-list

> >>>>

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> >>>>

> >>>> _______________________________________________

> >>>> open-cobol-list mailing list

> >>>> address@hidden

> >>>> https://lists.sourceforge.net/lists/listinfo/open-cobol-list

> >>>

> >>> ------------------------------------------------------------------------

> >>> ------ LIMITED TIME SALE - Full Year of Microsoft Training For Just

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> >>> 8,

> >>> SharePoint

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> >>>

> >>>

> >>> _______________________________________________

> >>> open-cobol-list mailing list

> >>> address@hidden

> >>> https://lists.sourceforge.net/lists/listinfo/open-cobol-list

>

> ----------------------------------------------------------------------------

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> 9/20/13.

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