I like to tell our users that TSM updates it's current "full backup" image
with every incremental. TSM doesn't need to move all the files every time,
and it makes no sense to do that.
(Except in the event of creating a full backup image on as few tapes as
possible for a quick restore)
"Seay, Paul"
<seay_pd@NAPTHEO To: [EMAIL PROTECTED]
N.COM> cc:
Sent by: "ADSM: Subject: Re: Incremental & full backups
Dist Stor
Manager"
<[EMAIL PROTECTED]
T.EDU>
05/22/2002 08:33
PM
Please respond
to "ADSM: Dist
Stor Manager"
J-B,
The best description of TSM is that it is a full backup that is
incrementally updated each time you run a backup. You can force a full
backup by using a mode=absolute in the management class copy group when
ever
you want to re-backup everthing regardless. The other alternatives are
backupsets and the selective command. However, the key is understanding
TSM
is a storage management tool that does backups and recoveries as needed.
It
is not just a backup tool. TSM's philosophy has a business data retention
orientation. If you have paper documents you don't just keep every 7th
revision to it, you keep them all until they have reached an expireation
based on length of time or number of back revisions. TSM does exactly
that.
The issue is the "incremental forever" misnomer that TSM gets. First of
all, it is not incremental in the sense of any other backup product.
Secondly, it is not forever, it is based on your policies for reclaimation
and other techniques you can use.
Read some of my other responses on this subject at www.adsm.org.
Paul D. Seay, Jr.
Technical Specialist
Naptheon, INC
757-688-8180
-----Original Message-----
From: Jean-Baptiste Nothomb [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, May 22, 2002 3:30 PM
To: [EMAIL PROTECTED]
Subject: Re: Incremental & full backups
Hi Rick,
thanks for your answer but in our case we have 5 tapes that shall be
recycled every week... Another question: What i've to create on the server
to do incremental backups and full backups for about a week retention?
>From: Rick Harderwijk <[EMAIL PROTECTED]>
>Reply-To: "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]>
>To: [EMAIL PROTECTED]
>Subject: Re: Incremental & full backups
>Date: Wed, 22 May 2002 20:52:06 +0200
>
>Jean-Baptiste,
>
>I have some rather good news for you: you only do a full backup once.
>After that, only incrementals. That's the difference with TSM... :)
>
>Regards,
>
>Rick
>
>-----Original Message-----
>From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED]]On Behalf Of
>Jean-Baptiste Nothomb
>Sent: woensdag 22 mei 2002 20:08
>To: [EMAIL PROTECTED]
>Subject: Incremental & full backups
>
>
>Hello,
>
>big question by a newbie:
>
>we want to put in place backups with the following scheme: One full
>backup of client nodes done Friday and the backup during the other days
>shall be incremental. The backups shall be kept for about 7 days. How
>have I to define the policy in ADSM. Can someone give me examples
>because I'm really new to this product. Another question: Does ADSM
>take care about holidays?
>
>Thanks a lot for your help,
>Jean-Baptiste
>
>
>
>
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