ADSM-L

Re: Backup question - Full and Incremental

2005-11-14 22:04:58
Subject: Re: Backup question - Full and Incremental
From: "Jones, Eric J" <eric.j.jones AT LMCO DOT COM>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Mon, 14 Nov 2005 22:04:55 -0500
Thanks.  The problem I have is the backup policies where set long before
I arrived.  I'm working to correct what we have so it's more efficient.
My thought initially was to do a full backup on some of the key servers
to get the data on a single tape so it is not on so many tapes then work
on a long term solution.  Collocation was something I was considering
but needed to do more homework to understand what affect it would have.
We have a few hundred servers that backup and I wanted to understand the
full effects of collocation before implementing.  A full backup would
give us a short term solution while working on the long term solution.

Thanks
Eric

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Richard Sims
Sent: Monday, November 14, 2005 7:42 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] Backup question - Full and Incremental

On Nov 14, 2005, at 3:19 PM, Jones, Eric J wrote:

> ...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. ...

Eric -

The magic word "collocation" does not appear in your posting. It is the
standard means by which data, related by node or filespace, is kept
together. That, plus reclamation, minimizes the number of tapes needed
to
perform a restoral.

Being a full-featured product, TSM provides a host of capabilities by
which
one may satisfy enterprise data recovery needs. A storage pool hierarchy
involving frontal disk, migration, caching, and copy storage pools will
allow quick restoral of most recent data. Full backups can be done, but
are
often testimony to an ill-thought-out backup/restore architecture.

Review redbook "IBM Tivoli Storage Management Concepts" and the
Administration
Guide manual for methods by which client-sent data may be managed. This
topic is also
heavily represented in the List archives. A good data recovery design
focuses first on
restoral methodologies and performance, then looks at realistic
approaches to backup
to facilitate restoral.

     Richard Sims