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vasanthz
Global Moderator
Joined: 28 Aug 2007
Posts: 1742
Location: Tirupur, India
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Hi,
We have a VSAM file and it is an underlying DB2 LDS dataset. We are trying to find out who/what job referenced the dataset.
The dataset information says the dataset was accessed 2 days back.
| Code: |
Dates
Creation date . . . : 2013/05/05
Referenced date . . : 2017/01/02
Expiration date . . : ***None*** |
But when we look at the SMF 14, 15, 17, 18, 60 to 68 record types for that particular day, there is no evidence on SMF for that access.
Could you please let me know if DB2 secretly accesses its datasets and does not leave an entry on 14, 15, 17, 18, 60 to 68 record types.
Is there any other place we could look? |
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steve-myers
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Joined: 30 Nov 2013
Posts: 917
Location: The Universe
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| Try reading MVS System Management Facilities (SMF) for your release. I suspect the record you need is not one of the garbage list of SMF records you listed. |
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vasanthz
Global Moderator
Joined: 28 Aug 2007
Posts: 1742
Location: Tirupur, India
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| Quote: |
| not one of the garbage list of SMF records you listed. |
They all appear elegant to me in their own way :-) |
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steve-myers
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| It's a "garbage list" because opening or closing a VSAM data set does not produce any of the SMF records in the list. |
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Robert Sample
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Joined: 06 Jun 2008
Posts: 8696
Location: Dubuque, Iowa, USA
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From the SMF manual:
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| Record type 62 is written at the successful or unsuccessful opening of a VSAM component or cluster. |
However, the issue probably is that DB2 may open the VSAM data set when it is started and not close it until the DB2 subsystem is brought down. Hence unless you're looking at the SMF records generated after an IPL or DB2 start up, you may not see any type 62 records. |
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vasanthz
Global Moderator
Joined: 28 Aug 2007
Posts: 1742
Location: Tirupur, India
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| Quote: |
| DB2 may open the VSAM data set when it is started and not close it until the DB2 subsystem is brought down. |
Thank you for your reply Robert. I was having a similar thought but the dataset information says that it was referenced on 2017/01/02.
So I was thinking that the dataset must have been closed. Also the dataset is no longer used by DB2 now. So between 2017/01/01 and now the dataset must have been closed, But there is no evidence of it in the SMF 60 to 68. |
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steve-myers
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| Remember, when you examine type 62 records, SMF62DMD will be the name of the data component of the LDS, not the LDS name. |
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