I have an offline storage system that is similar to HSM with millions of
files totaling about 5 tb. The guy before me using legacy file level
backups gave up as the processing of the data took roughly 5 days to
complete and changes to the data during backup further complicated the
issue. Not to mention the impact all of those files had on the TSM DB. I
initiated an image snap backup which completes in a fraction of the time
and then port it to a data domain box for the de-dup/compression
benefits. While not perfect it does alleviate the  enormous overhead on
the TSM database and minimizes storage requirements. 

If someone contributes a better plan they have my thanks in advance, as
I will use it! :)

Thank you,
~Rick


-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Gill, Geoffrey L.
Sent: Wednesday, May 26, 2010 7:04 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] why create a 12TB LUN

I'm guessing many of you will find this quite odd, I know I did, but I
had someone come to me and say they were going to ask for a 12TB LUN and
wanted to back it up. Without even mentioning the product they want to
use, obviously not TSM though, and I'm not even sure it would make
difference, how would you manage to get a 12TB LUN backed up daily. I
would expect it to be at least 75% full if not more, and even without
knowing what percentage of data changes on it, it would seem to me the
request seems strange. They're thinking of getting a VTL and backing up
through fiber direct, not across the network, but no idea which one or
what sort of throughput to expect.

 

Have any of you been approached with this sort of request and if so what
was your response? I'm sort of dumbfounded at this point since I've not
heard or seen this anywhere.

Thanks,

 

Geoff Gill 
TSM/PeopleSoft Administrator 

SAIC M/S-B1P 

4224 Campus Pt. Ct.

San Diego, CA  92121
(858)826-4062 (office)

(858)412-9883 (blackberry)