Mailinglist Archive: opensuse-security (256 mails)

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Re: [suse-security] remote ssh dump ziemlich langsam
  • From: "dadirtyluk" <news4dadirtyluk@xxxxxx>
  • Date: Thu, 24 Feb 2005 12:15:27 +0100
  • Message-id: <OGEJINKECGKMNAGMBCNGEEEDCGAA.news4dadirtyluk@xxxxxx>
i now tried rsh again and after finding the right article in google
rsh is easy, too ;)

dump is still a bit slower than scp:

DUMP: Volume 1 transfer rate: 4891 kB/s

i think i can go with that now, but i'd really like to know why ssh
slows that thing down so much...

thx to the list and greetingz


(and sorry for responding to some guys directly and not to the list...)

> 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
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