ADSM-L

TSM vs Veritas Netbackup Synthetic backup solution

2004-02-23 17:54:49
Subject: TSM vs Veritas Netbackup Synthetic backup solution
From: Petur Eythorsson <Peddi AT ITN DOT IS>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Mon, 23 Feb 2004 22:54:25 CUT0
Hi TSM Admins.

There has been some time since i posted a message there so I'm not up to speed
on the talk, but i made a search on this topic and found nothing but old news,
witch do not apply here.

First of I want to say i have been involved with selling and installing TSM
for since TSM 3.7 and this is the first time i see a threat from the
competitors. Veritas synthetic backup with disk solution brings similar
solution to customers as TSM Progressive Incremental backup. First of there is
no Network traffic since veritas can make a new full backup from the old full
backup and all the incremental4s go to disk. second they claim they can use
Tape Drives more effectively. This has rased questions witch i can4t answer
since i have no Veritas Background. And i am hoping that someone has answer to
these questions.

How does this scale? - Do I need extra drives in my library to handle the
creation of the synthetic full tapes? - Do I need extra tapes?

How often can I make a synthetic full - Is this only recommended on a weekly
basis?

How do I make a point in time restore to a point between to synthetic fulls?

How much overhead of files should I expect for creating the synthetic fulls?

Can I collocate data so data to a given client is not scattered on several
tapes?

Can I restart a restore of a large file if the connection fails or do I have
to restart the restore of that specific file?

If I decide to change my policies - How does that affect the data that has
already been backed up?

What happens when tapes contain mostly wasted space due to expired data?


I rely need answer's to these questions. since need to make a potential
customer understand the difference here.


Regards
Peter

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