Hinrich Aue wrote:
The first and the second tape only 1.2G were used. on the third tape only
600M of the space were used.
So I think 2 tapes could have been enough.
Aha, for this case, amanda has (since 2.4.3) the amanda.conf parameter
"taperalgo", which defaults to "first" (take the first image in the
directory), while in your case "taperalgo largestfit" would be better.
To maker better use of this algoritm, amanda needs to be able to choose
from many images, therefore it is better to specify "dumporder" too.
I just happened to explain this all a few days ago:
http://groups.yahoo.com/group/amanda-users/message/46327
Your DDS2 tape, what is the server hardware?
I think it is faster than my 745/99. Is there a way to tune that? I already
use holding disks.
Are 150kb/sec usual on a slow machine? I think it's compareable to a Pentium
200.
The server hardware is a 4 year old PC with Celeron 333 MHz,
128 MByte RAM, AHA2940 scsi controller, DDS-2 internal, 2 times AIT-1
external, 1 IDE disk 4 GByte with OS etc, and IDE holding disk 80 GByte,
3Com 100Mbit ethernet, Linux 2.4.20.
Nobody here would want that PC running Win2000 on his desk, but for
amanda it is perfect. Here are the statistics for an archive run
in the weekend:
STATISTICS:
Total Full Daily
-------- -------- --------
Estimate Time (hrs:min) 0:18
Run Time (hrs:min) 11:49
Dump Time (hrs:min) 52:05 52:05 0:00
Output Size (meg) 89489.7 89489.7 0.0
Original Size (meg) 214535.0 214535.0 0.0
Avg Compressed Size (%) 41.7 41.7 --
Filesystems Dumped 120 120 0
Avg Dump Rate (k/s) 488.7 488.7 --
Tape Time (hrs:min) 7:51 7:51 0:00
Tape Size (meg) 65995.8 65995.8 0.0
Tape Used (%) 200.1 200.1 0.0
Filesystems Taped 50 50 0
Avg Tp Write Rate (k/s) 2393.3 2393.3 --
USAGE BY TAPE:
Label Time Size % Nb
ARCHIVE-040 4:48 32969.7 99.9 22
ARCHIVE-041 3:03 33026.1 100.1 28
And I flush the remaining backups to a third tape on monday morning.
Yes, that's a backup of 214 Gbyte (all full) in half a day.
--
Paul Bijnens, Xplanation Tel +32 16 397.511
Technologielaan 21 bus 2, B-3001 Leuven, BELGIUM Fax +32 16 397.512
http://www.xplanation.com/ email: Paul.Bijnens AT xplanation DOT com
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