I have had to restore ~52GB of data several times now, and it generally
takes around 6 hours over Gigabit ethernet.  It's around 800,000 files,
most of them very small.  Besides the small files, it also has the
problem of being a high-turnover group of files.  So the restore is
spread out over a lot of tapes.  I would think (hope) that this
represents pretty close to a worst-case scenario.


Troy Frank
Network Services
University of Wisconsin Medical Foundation
608.829.5384

>>> mikee AT MIKEE.ATH DOT CX 9/24/2004 11:45:15 AM >>>
Something came up the other day talking about one of our large intel
fileservers (windows 2003) on how long it might take to restore its
shared drive should the entire drive be lost. Today I used the client
TSM gui and requested an estimate of file sizes and times to restore
this intel drive. The gui came back with the estimate of 125 hours
to restore 260GB of data contained in 974008 objects.

How good are these estimates and how can I get this time down from
0.0346GB/minute to 1.0GB/minute (260 minutes to restore 260GB of
data)? The network is 100Mb/sec, so that's 450MB/hour. That's seems
to be 591.8MB/hour. The reports do not show that compression is
turned on for any (not this) clients.

How does this work out?

Mike

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