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m29 · Beginner Joined: 27 Oct 2004 Posts: 7 Topics: 2

I have a multi file single volume tape with 3 files on it.

I ran a dummy IEBGENER to read these files.

browsing the SMF generated , I saw 4 14 records related to this action.

How come ? , since there are only 3 files, how come there are 4 SMF 14 records and not 3 ?

To my understanding, SMF 14 record is generated upon a close dataset or EOV.

Looking into the SMF, I could see that the first 2 records were related to the first file.

Could it be the result of reading the label ? ( but then again, there isn't a close dataset operation , or is it ....)

kolusu · Posted: Wed Oct 27, 2004 10:17 am Post subject:

m29,

Could this be a reason ?

If a data set is closed multiple times within a single step, a record is written with each close, and the data counts are cumulative. Post processing programs should consider this or duplicate counts will be processed.

Kolusu
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Kolusu
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m29 · Beginner Joined: 27 Oct 2004 Posts: 7 Topics: 2

I know about this, I read it myself.

Thing is, if this is the case, then that means that IEBGENER closed the first files twice. why would it do that ?

Doesn't really sounds logic to me ...

Bill Dennis · Posted: Wed Oct 27, 2004 3:56 pm Post subject:

If IEBGENER is really using ICEGENER then it could be SORT under the covers. It seem like SORT will open the file, test the records, close the file and then re-open for the actual copy operation. I'm not sure why it didn't show that for all 3 files. Maybe Frank will see this and clarify my answer.

Regards,
Bill Dennis

Frank Yaeger · Posted: Wed Oct 27, 2004 7:20 pm Post subject:

Bill,

I think there may be some "odd" cases where DFSORT needs to open, close and reopen the input file, but we don't do that for the general case.
_________________
Frank Yaeger - DFSORT Development Team (IBM)
Specialties: JOINKEYS, FINDREP, WHEN=GROUP, ICETOOL, Symbols, Migration
DFSORT is on the Web at:
www.ibm.com/storage/dfsort

m29 · Beginner Joined: 27 Oct 2004 Posts: 7 Topics: 2

Frank,

even if this is an "odd" case, why only the first file out of the 3 ?

Bill Dennis · Posted: Thu Oct 28, 2004 7:51 am Post subject:

Maybe it was on Variable Blocked files where it tried to find an average record size when none was passed via the parmlist??? I think that case would only be meaningful on a SORT, not a COPY.

Regards,
Bill

m29 · Beginner Joined: 27 Oct 2004 Posts: 7 Topics: 2

I don't think DFSORT is in this. IEBGENER only read the files and didn't copy them, so why DFSORT is in it ?

And the files are all FB

Frank Yaeger · Posted: Thu Oct 28, 2004 10:19 am Post subject:

m29 wrote

m29 · Beginner Joined: 27 Oct 2004 Posts: 7 Topics: 2

no , it's not an ICEGENER , just an IEBGENER.