Avg Dump Rate and Compression
2004-03-23 20:55:48
hello guys, I'm new to amanda (and the list)...
I just installed amanda for the first time, and was doing some backups/tests
using it.
My doubt is... isn't 324.7 K/s for dump rate too slow? I was backing up 1Gb
of data and it's taking almost 1 hour! does that mean that for 12Gb I'll get
something close to 12 hours?
my tapetype is:
define tapetype DDS-3 {
comment "Sony SDT-9000 (DDS-3)"
length 11631 mbytes
filemark 434 kbytes
speed 1139 kbytes
}
shouldn't it run at 1139 K/s?
another thing, I tried using compress server best and compress client best
and I get no difference at all on the backups, same time to run, same amount
of data, and same tape usage.
below is a dump report for the last test I've ran.
These dumps were to tape DailySet02.
The next tape Amanda expects to use is: DailySet01.
STATISTICS:
Total Full Daily
-------- -------- --------
Estimate Time (hrs:min) 0:00
Run Time (hrs:min) 0:59
Dump Time (hrs:min) 0:58 0:58 0:00
Output Size (meg) 1104.6 1104.6 0.0
Original Size (meg) 1104.6 1104.6 0.0
Avg Compressed Size (%) -- -- --
Filesystems Dumped 1 1 0
Avg Dump Rate (k/s) 324.7 324.7 --
Tape Time (hrs:min) 0:58 0:58 0:00
Tape Size (meg) 1104.6 1104.6 0.0
Tape Used (%) 9.5 9.5 0.0
Filesystems Taped 1 1 0
Avg Tp Write Rate (k/s) 324.5 324.5 --
USAGE BY TAPE:
Label Time Size % Nb
DailySet02 0:58 1104.6 9.5 1
NOTES:
planner: tapecycle (1) <= runspercycle (1)
planner: Last full dump of handsoff:/home/data/archive on tape DailySet01
overwritten in 1 run.
taper: tape DailySet02 kb 1131200 fm 1 [OK]
DUMP SUMMARY:
DUMPER STATS TAPER STATS
HOSTNAME DISK L ORIG-KB OUT-KB COMP% MMM:SS KB/s MMM:SS KB/s
-------------------------- --------------------------------- ------------
handsoff -ta/archive 0 11311501131150 -- 58:03 324.7 58:06 324.5
(brought to you by Amanda version 2.4.4p2)
cheers,
--
Fernando Serto
Systems Administrator
Memetrics Pty.
Phone: +61 2 95560833
Fax: +61 2 95556911
Mobile: 0403 338 005
E-mail: fernando.serto AT memetrics DOT com
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