Mailinglist Archive: opensuse-security (256 mails)

[Robbert Eggermont <R.Eggermont@xxxxxxxxxxxxxx>]

dadirtyluk wrote:
> wenn ich eine platte uebers netz dumpen will klappt das
> eigentlich alles, aber einfach ziemlich langsam.
> 
> dump schafft ca 1MB/s ~10Mbit/s
> scp schafft ca. 6/7MB/s ~50Mbit/s
> 
> fällt dazu irgendwem was ein? bin ein bisschen ratlos.

I only got around 33% throughput when dumping via ssh over gigabit
ethernet to a remote tapedrive, as compared to dumping to a local
tapedrive ("DUMP: Average transfer rate: 3204 kB/s."). The bottleneck
was not (only) in the used cipher, as the load on neither machine ever
reached 100%. Increasing the dump blocksize ('dump -b 1024') helped a
little, but I'm not sure that it was not just the reduced overhead.

I can recommend portable USB/firewire harddisks connected locally!

Robbert

-- 
Robbert Eggermont                   Information & Communication Theory
R.Eggermont@xxxxxxxxxxxxxx     Electr.Eng., Mathematics & Comp.Science
+31 (15) 2783234                        Delft University of Technology