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rasprasads · Posted: Fri Apr 11, 2003 4:03 am Post subject: SORT output file - space abend

Hi,

In a sort step

I had an input file with following characterstics:

No of records : 12 000 000
Lrecl : 600
Recfm : VB

Output file

Lrecl : 20
Recfm : FB

The doubt is that when i specified (CYL,(10,10),RLSE) the job abended due to SB-37.

I increased the space and it reran successfully. The no. of records that was selected to output file was only 7 000 000(due to an include cond). The allocated cyls was 186.

How come the job failed at first as (10 + 10 * 15) = 250 cyls should have been alloacated.

Give your ideas on this please.....
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Rasprasad S

kolusu · Posted: Fri Apr 11, 2003 5:43 am Post subject:

Rasprasad,

rasprasads · Posted: Fri Apr 11, 2003 11:09 am Post subject:

Kolusu,

One more doubt. How to find no. of records in a tape dataset. I tried SORT but it takes a longer time since the file is over many number of volumes. Is there any other solution to this. Can i do it using blkcnt. If so how?

Thanks.....
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Rasprasad S

kolusu · Posted: Fri Apr 11, 2003 11:48 am Post subject:

Rasprasad,

If you are interested to know the no: of records in the tape file , just DUMMY out the sortout dataset. Sort products are highly optimized products. The main delay is with the MOUNT of the tapes. Some shops has virtual tapes which act just like DASD files.

I think CA-1 is a tape management utility which keeps track of no: of records and volumes.

So check with your systems programmer if you have any tape management utilities on your system.

Hope this helps....

Cheers

Kolusu

rasprasads · Posted: Sat Apr 12, 2003 9:03 am Post subject:

I tried to copy an input file(Lrecl=565) in tape to a DASD output file. The output dataset space was given as (CYL,(300,100),RLSE).

Lrecl=20 and no of records= 3200000.

Now space would be there for 75 000 000 records(apprx).
In any case there should not be space abend. But SB-37 occured.

Any reasons...
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Rasprasad S

kolusu · Posted: Sat Apr 12, 2003 10:48 am Post subject:

Rasprasad,

Just because you have defined the space=(cyl,(300,100),rlse) does not gurantee that you will get 1800 cylinders. Therotically you should get all the space. But in reality it depends on your shop dasd size. If there are no sufficient volumes to allocate the space then your job will abend with a B37 or E37. Take a look at your Job output and you will find something like