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Problem in reading a file while Jobs are in parallel run

 
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chidambaram

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Joined: 16 Oct 2007
Posts: 11
Location: Chennai

PostPosted: Fri Nov 20, 2009 2:44 pm    Post subject: Problem in reading a file while Jobs are in parallel run
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Dears,

Can any one suggest me how we can handle the below problem.

My requirement :

I need to read a file in rexx and inside that file I need increment the count by 1.

When I am calling this rexx by the Jobs which are running parralely at same time I am facing a problem that the file is already inuse.

My rexx Pgm:

Address tso "alloc da('"inp_file"') f(indd1) shr"
if rc /= 0 then do
say 'Error in allocating the file' inp_file
return_code = 8
call exit_routine
end
Address tso "execio * diskr indd1 (finis stem" stmnm"."
if rc /= 0 then do
say 'Error in reading the file' inp_file
return_code = 8
call exit_routine
end
Address tso "execio 0 diskr indd1 (finis"
Address tso "free f(indd1)"

Chipu
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Garry Carroll

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Joined: 08 May 2006
Posts: 1002
Location: Dublin, Ireland / Edinburgh, Scotland

PostPosted: Fri Nov 20, 2009 3:01 pm    Post subject:
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Why would you want to update a file that is being used in parallel by other programs?

Garry.
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chidambaram

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Joined: 16 Oct 2007
Posts: 11
Location: Chennai

PostPosted: Fri Nov 20, 2009 3:04 pm    Post subject:
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My reguirement is,

If Jcl calls this rexx program then I need to increment the count by one. So that I can get a count that how many times the rexx program is used in a day.

Thanks,
Chipu
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superk

Moderator Team Head


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

PostPosted: Fri Nov 20, 2009 3:48 pm    Post subject: Reply to: Problem in reading a file while Jobs are in parall
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You need to be using DISP=OLD processing with the dataset allocation in the JCL, not in the EXEC.
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expat

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Joined: 14 Mar 2007
Posts: 8620
Location: Back in jolly old England

PostPosted: Fri Nov 20, 2009 4:16 pm    Post subject:
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I would like to know the important reason why you would need to know how many times a certain REXX is invoked daily.
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enrico-sorichetti

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Joined: 14 Mar 2007
Posts: 10375
Location: italy

PostPosted: Fri Nov 20, 2009 4:17 pm    Post subject: Reply to: Problem in reading a file while Jobs are in parall
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there is something that the TS wants to hide/is not telling ...

no way that the posted rexx snippet could cause an OLD disposition

maybe the script is failing because somebody else has the dataset in OLD
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