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Need information on SB37 Space issue in Jcl

 
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sivasaras

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Joined: 29 Sep 2007
Posts: 90
Location: chenna/i-

PostPosted: Mon Jan 16, 2012 7:20 pm    Post subject: Need information on SB37 Space issue in Jcl
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Hi,

My application job which is running daily got abended with SB37 issue while writing the records to the report file.

This is the file which abended

DSN=MT.MTCH01.MT00535.ERROR.REPORT(+1),
DISP=(NEW,CATLG,CATLG),
DCB=(RECFM=FB,LRECL=133,BLKSIZE=27930),
SPACE=(CYL,(10,2),RLSE)


Now I am going to increase the cylinders from CYL(10,2) to CYL(200,200) so that it wont abend once again.

Daily I am receiving 2,000,000 records and while writing some of the records which are rejected then I got SB37 issue.

Kindly guide me whether I can go ahead with this increase of space.

Thanks
Siva
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Bill Woodger

DFSORT Moderator


Joined: 09 Mar 2011
Posts: 7315

PostPosted: Mon Jan 16, 2012 7:31 pm    Post subject: Reply to: Need information on SB37 Space issue in Jcl
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You need a reasonably estimate of how many items should be on the report. Size it accordingly, allowing for business growth. Someone, like Production Control, should monitor for extents used.

The problem with making it huge is, if there is a program error or unusual event which causes a lot of erroneous rejections, the first thing you know about it is when the user sees it, rather than when it has blown the "reasonable" size of the report file.
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Robert Sample

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Joined: 06 Jun 2008
Posts: 8057
Location: East Dubuque, Illinois, USA

PostPosted: Mon Jan 16, 2012 7:40 pm    Post subject:
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Your current allocation allows, at most, 252000 records (40 cylinders of space times 15 tracks per cylinder times 2 blocks per track times 210 records per block -- the limit may be less if the volume is nearly full) whereas the space you're proposing allows for over 20 MILLION records. Both are completely ridiculous -- if you are getting 2 million records a day, size the error file to allow for every record to be an error; don't allocate a small proportion for the file, and don't allocate 10 times the space it needs. And don't rely on secondary extents -- size the file correctly with the primary space allocation.
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sivasaras

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Joined: 29 Sep 2007
Posts: 90
Location: chenna/i-

PostPosted: Mon Jan 16, 2012 8:33 pm    Post subject:
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Hi,

Thanks for the reply

i will increase the primary allocation and now the space=(CYL,(100,25),RLSE)

This is ok

Thanks
Siva
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