Hi!
You can perform sometimes full/selective backup to achieve better restore speed.
Caution, this will always add a new file version to TSM,
even for unchanged files,
so check it against your backup management class definitions.
Example: assuming you know your File "a" is changing once a week and you want
to keep it for 70 days
ist is OK to allow for 10 backup versions.
But if you are goiing to perform selective backup of "a" daily then
you have to allow for 70 versions.
This will consume some addition space in you TSM DB,
this will cost you backup time/bandwidth/space on tsm tapes,
this will slow-down your TSM server in general.
I AM doing selective for the very same reason
but only for windows user profiles, once a month. It is helpfull for me.
Doing it for whole servers/pc´s would probably saturate my TSM.
> Another question came up, is there any way to have TSM
> organize data already on tape for a specific server so it's
> on a few tapes instead of spread across many tapes?
Look for collocation which is an attribute of tape storage pools.
regards
juraj
> -----Ursprüngliche Nachricht-----
> Von: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] Im
> Auftrag von Jones, Eric J
> Gesendet: Montag, 14. November 2005 21:20
> An: ADSM-L AT VM.MARIST DOT EDU
> Betreff: Backup question - Full and Incremental
>
> Good Afternoon.
>
> I have a question on backups and how if you mix full backups
> and incremental backups the data is stored.
>
> We are running TSM 5.2.2 on all our TSM clients(AIX, SUN,
> Windows 2000, windows 2003), and the server is AIX 5.2 with TSM 5.2.2.
>
> We normally just run incremental for all our machines and
> over the years the data gets scattered every where(number of
> tapes and in some cases
> 30+) so restores can be very slow. We keep all our data for
> 90 days so
> with the incremental backups the files expire after 90 days
> if the file has been backed up(90 day policy/keep up to 90
> backups). My question is if I want to do a full backup every
> 120 days just to better organize my data on less
> tapes(current data) does it effect the incremental data
> that is on tape in any way? Does TSM see the backups
> including a full
> backup as files and they expire after a given amount of time?
>
> From what I could find that is the case but I do not want to
> mess up years of data and the users were asking lots of
> questions on how it might affect them. They would be happy
> with the possibility of faster restores.
>
> Another question came up, is there any way to have TSM
> organize data already on tape for a specific server so it's
> on a few tapes instead of spread across many tapes? Just
> seeing if we could better manage our data.
>
>
> Thanks
>
> Eric Jones
>
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