Re: Are we losing users to Gentoo?

[ilmari@ping.uio.no (Dagfinn Ilmari Mannsåker)]

Matt Zimmerman <mdz@debian.org> writes:

> On Wed, Nov 20, 2002 at 04:15:42PM +0100, Dagfinn Ilmari Mannsåker wrote:
>
>> Andrew Suffield <asuffield@debian.org> writes:
>> 
>>> If you transfer gigabyte files via scp, you're screwed. scp has some
>>> serious performance issues; use rsync-over-ssh.
>> 
>> What kind of performance issues? I just SCPed a 4.2GB file (the woody
>> ISO's concatenated) over 100BaseT-FD and it sustained around 6.5MB/s and
>> 100% CPU load on the sending side (a 566MHz Celeron). The receiving
>> side, a 800MHz P-III mobile hovered around 60% CPU load.
>
> You just demonstrated that it was CPU bottlenecked, and thus not fully
> utilizing the available network capacity.

Yes, but I got distracted by work and forgot to ask how rsync-over-ssh
would help transfering (not synchronizing) large amounts of data? It has
to transfer an equal amount of bytes over the same encrypted channel
that scp does.

And I would hardly call doing 6.5MB/s with a 3-year-old CPU being
"screwed".

-- 
ilmari