ADSM-L

Re: [ADSM-L] Weird SQL output

2014-11-21 08:08:08
Subject: Re: [ADSM-L] Weird SQL output
From: "Loon, EJ van (ITOPT3) - KLM" <Eric-van.Loon AT KLM DOT COM>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Fri, 21 Nov 2014 13:02:09 +0000
Hi Efim!
Since we don't checkout tapes it won't be an issue for us. Apart from that, it 
still doesn't explain why the total of last_use='Data' and last_use!='Data' is 
not equal to the output from the query with no last_used specified.
As to your query: I found this one online too, but it's not always reliable, 
especially when you create backupsets. They are not in a q volume list but they 
are not scratch. I think this query is usefull when you somehow include the 
volume history which does contain the backupset volumes. 
Kind regards,
Eric van Loon
AF/KLM Storage Engineering


-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of 
Efim
Sent: vrijdag 21 november 2014 13:41
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: Weird SQL output

Hi,
Select with last_use = ‘Data’ is not correct. If you checkout and when checkin 
tapes the parameter last_use can be lost.
If you want to check private tapes without the data, try to use select like 
this:

select volume_name from libvolumes where status='Private' and last_use is NULL 
and volume_name not in (select volume_name from volumes)

Efim

2014-11-21 12:16 GMT+03:00 Loon, EJ van (ITOPT3) - KLM <Eric-van.Loon AT klm 
DOT com>:
> Hi guys!
> I have some weird output from one of my SQL statements. Here it's is:
>
> select count(*) from libvolumes where status='Private'
>   Unnamed[1]
> ------------
>         3698
>
> Ok, so 3698 private volumes on this server. Now, how many contain data:
>
> select count(*) from libvolumes where status='Private' and last_use = 'Data'
>   Unnamed[1]
> ------------
>         1011
>
> Right, I know a lot of tapes do not have a value in the Last Use column (my 
> guess it is that these are tapes created by SAN clients), so how many are 
> there:
>
> select count(*) from libvolumes where status='Private' and last_use != 'Data'
>   Unnamed[1]
> ------------
>            0
>
> Huh? There should be 3698-1011=2687! Last_use is empty then?
>
> select count(*) from libvolumes where status='Private' and last_use=NULL
>   Unnamed[1]
> ------------
>            0
>
> I'm lost here... I'm I doing something wrong? The total of last_use='Data' 
> and last_use!='Data' should be the same as the output from the query with no 
> last_used specified, right?
> Thanks for any help in advance!
> Kind regards,
> Eric van Loon
>
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--
Efim
********************************************************
For information, services and offers, please visit our web site: 
http://www.klm.com. This e-mail and any attachment may contain confidential and 
privileged material intended for the addressee only. If you are not the 
addressee, you are notified that no part of the e-mail or any attachment may be 
disclosed, copied or distributed, and that any other action related to this 
e-mail or attachment is strictly prohibited, and may be unlawful. If you have 
received this e-mail by error, please notify the sender immediately by return 
e-mail, and delete this message. 

Koninklijke Luchtvaart Maatschappij NV (KLM), its subsidiaries and/or its 
employees shall not be liable for the incorrect or incomplete transmission of 
this e-mail or any attachments, nor responsible for any delay in receipt. 
Koninklijke Luchtvaart Maatschappij N.V. (also known as KLM Royal Dutch 
Airlines) is registered in Amstelveen, The Netherlands, with registered number 
33014286
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