Bill, the RECONCILE VOLUMES command reporting backupset virtual volumes
(...OST... names) in error is fixed in 5.1.6.0. See the README file. I
reported the bug last fall and it just took a while for the fix to be
delivered.
Joerg Pohlmann
604-535-0452
Bill Boyer <bill.boyer AT VERIZON DOT NET>
Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
2003-02-14 07:03
Please respond to "ADSM: Dist Stor Manager"
To: ADSM-L AT VM.MARIST DOT EDU
cc:
Subject: Re: Estimating size of backup sets
Be careful using virtual volumes for backupsets. A backupset is not a
recognized type of virtual volumes and if you run the RECONCILE VOLUMES
command, the virtual volume will be deleted, but not the backupset
reference
to it. If you can absolutely guarantee that no one will ever run the
RECONCILE VOLUMES command, virtual volumes would be good for backupsets,
as
you're not wasting a entire tape volume for a small node.
Unless Tivoli changed this since I did initial testing back when 5.1 first
came out...
Bill Boyer
"Hit any user to continue!" - ???
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU]On Behalf Of
Joerg Pohlmann
Sent: Thursday, February 13, 2003 9:37 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: Estimating size of backup sets
Graham, an estimate is the sum of (capacity * percent utilized) for the
filespaces for a given client if you are including all filespaces in your
GENERATE BACKUPSET. Realize that if you are using a tape device class, the
minimum amount of media is one tape cartridge per backupset. So, for small
clients, you may have a low utilization for backupset tapes. In your case,
you will have a minimum of 700 tapes for the backupsets. You may want to
consider a non-tape device class, such as a server device class if you
have multiple TSM servers, or even setting up a virtual volume environment
on a single TSM server as backupsets are then archive objects (that is
virtual volumes) that can co-reside on a physical tape. The amount of
space is then the sum of capacity * percent utilized for all 700 clients
in MB - you can then take the capacity of the tape media to calculate the
actual amount of space required. Use the capacity you achieved for full
tapes as a realistic capacity.
Joerg Pohlmann
604-535-0452
Graham Trigge <Graham_Trigge AT ENTERPRISESERVICES.COM DOT AU>
Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
2003-02-13 14:35
Please respond to "ADSM: Dist Stor Manager"
To: ADSM-L AT VM.MARIST DOT EDU
cc:
Subject: Estimating size of backup sets
TSMers,
Is there anyway people know of to estimate how large a backupset is going
to be? I have close to 700 nodes I want to generate backupsets for and I
want to know
what sort of space I will be using up with them. I am assuming it will be
some sort of SQL statement looking at active files, but I can't figure it
out past that.
Any help would be appreciated.
Regards,
----------------------------------------------------------------------------
--
Graham Trigge
IT Technical Specialist
Server Support
Telstra Australia
Phone: (02) 9882 5831
Fax: (02) 9882 5993
Mobile: 0409 654 434
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