From: Graham A. Patterson (grahamp@econ.berkeley.edu)
Date: Fri Nov 08 2002 - 12:26:56 PST
The issues you have to look at are backup speed (maybe 100MB/min to a
local DDS-3 tape, closer to half that over 100Mbps switched network),
capacity, and redundancy. For your 38GB, that is 6.5 hours without a
verify pass.
You will need to store less, run more parallel tape drives, or backup less
often (ouch!), or demand larger and larger backup windows.
Our staff files are kept locally, and trickled to a server twice a day.
The server copy is diff'ed to tape every evening, and dumped weekly on a
rotating sequence. We are using a DDS-3 autoloader, and I hope to add a
second one on another machine to deal with network backups. We only look
at data - the OS and applications can be re-built.
Having a server copy does help respond to emergencies. Ironically as I was
reading your post I had to restore a deleted database for one of my
people!
Our Unix systems are using LTO in place of DDS because of the size versus
available time equation.
Graham
-- Graham Patterson, NT/XP System Administration Dept. of Economics, UC Berkeley (510)643-5397------------------------------------------------------------------------ The following was automatically added to this message by the list server:
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