Hey Kelvin

I will have to support NBU as well as TSM. I went to a five day course on NBU 
just 2 weeks ago. I was very biased towards TSM before this course but tried to 
keep an open
mind. Well the course only confirmed my fears. NBU is archaic, easy to install 
but painstakingly hard to configure. Hard in the sense that if you want 
different
retentions for different files on a server, you have to create 2 or more 
different schedules for that 1 server. They now have a binary catalog which is 
a plus because it
speeds things up a bit and reduces its size. You can backup to disk but getting 
that data to tape is is pretty rough. There is no reclamation so if you've got 
a 2 kb file
on an LTO well you're wasting 200 GB of usefull space.

Keep in mind that NBU and TSM are 2 very different backup concepts. NBU keeps 
track of tapes whereas TSM keeps track of objects. Your company will have to 
rethink its
whole backup/restore procedures. NBU cannot do incremental forever. You have to 
do fulls every week and month for all your servers. This meens more tapes and 
drives and a
network that gets pounded.

Guillaume Gilbert
CGI Canada




Kelvin Tan <ktan AT TABLIMITED.COM DOT AU>@VM.MARIST.EDU> on 2002-10-18 01:29:24

Veuillez répondre à "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>

Envoyé par :      "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>


Pour : ADSM-L AT VM.MARIST DOT EDU
cc :
Objet :     Veritas Enterprise Netbackup 4.5

Hi Gurus

At the moment we are using TSM 4.2 but the management is looking at Veritas 
Enterprise Netbackup and I have to convince them about staying put with TSM.  
Has anybody move
from TSM to Veritas Enterprise Netbackup 4.5 running on Unix??   Any advantages 
Veritas has over TSM?  If TSM is that good how come it does not dominate the 
backup
market?  I have read the report of Veritas vs TSM but that is on Intel and 
related to version 3.

Hope somebody can enlightened me.

Thanks.

Kelvin Tan


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