HI all,

        I think there no problem to do it.
        But you have to have the right Hardware and Software ifrastructure.



        As an example Veritas and STK have done a test to backup 2TB in 1 hour.
        www.eweek.com/article2/0,3959,9155,00.asp

        I think with TSM 5.1 /LanLess and 2GB fibrechannel switches and 
Tapesdrives
you could backup 200GB in 2-3 hours.

        Today there a tape drive with 19MB/sec (STK 9840B)  and  in September 30
MB/sec (STK 9940B )
        without compression!

        For more Information

        Mfg
        Michael Struwe

        StorageTek

-----Urspr|ngliche Nachricht-----
Von: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU]Im Auftrag von
Chris Gibes
Gesendet: Donnerstag, 22. August 2002 22:31
An: ADSM-L AT VM.MARIST DOT EDU
Betreff: Re: Backup of 300 GB Data within 12 Hours


Definitely possible, I know of someone doing the same amount of data in
5+ hours. A SAN would help, but isn't necessary if you have gigabit
Ethernet. What you do need is: Gigabit Ethernet (hopefully on a
dedicated backup network) or a SAN and highspeed tape (such as LTO,
3590, etc.) or a big enough diskpool to hold the complete backup. Also,
both sides of the backup stream (i.e. TSM client and server) must be
able to handle that amount of I/O.  That means a TSM server with enough
memory and cpu cycles to handle both the data transfer and the
accompanying TSM database transactions (so the single processor 500Mhz
PII with 256MB of RAM won't do it, but a 2way p610 with 2GB of RAM
might, an IBM Regatta server definitely would) and a client that can
push the data out that fast.  What you didn't say is what kind of data
this is. Is this a database? Is it a simple flat file backup? Are there
lots of small files or a few big files or a mixture? What else will the
client machine be doing while the backup is going on? These are other
factors to consider in addition to the hardware.

Chris Gibes

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Sascha Braeuning
Sent: Thursday, August 22, 2002 1:36 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Backup of 300 GB Data within 12 Hours

Hi,

what is your opinion about backing up or restoring 300GB data with TSM
within 12 hours from one client? Possible or not? Do I have to use a SAN
that I get acceptable transfer rates? If there is anybody out there who
backs up such a big amount of data:

How is your "TSM"-area constructed? (e.g. Server-type, LAN, SAN ...)

MfG
Sascha Brduning


Sparkassen Informatik, Fellbach

OrgEinheit: 6322
Wilhelm-Pfitzer Str. 1
70736 Fellbach

Telefon:   (0711) 5722-2144
Telefax:   (0711) 5722-1630

Mailadr.:  sascha.braeuning AT sparkassen-informatik DOT de