On Mon, 22 Jan 2001 16:30:33 +0200 (EET)
Hannes Niemi <[EMAIL PROTECTED]> wrote:
> One should check that the network is 100Mbit and working on FullDuplex
> mode. As Atro says the 1000 kB/s is slow and the problem seems to
> be in network it self. Specially the auto mode may couse problems.
Before he gets all bent out of shape over his network he should make sure
what he's measuring ... like the speed of the disk/filesystem at one end
or the other.
Paul
> On Mon, 22 Jan 2001, Atro Tossavainen wrote:
>
> > Hejsan Per,
> >
> > > --- spec ---
> > > SSH2.0.13 -- Solaris 2.7 -- SPARC 220R -- Extreme24 (switch)
> > >
> > > Hi,
> > >
> > > I Sent a 50MB file (from host a to host b) with scp and got ~185kb/s
> > > over a 100Mbit switched full duplex LAN.
> > >
> > > Is that good or bad?
> >
> > Very bad indeed!
> >
> > SSH2 uses the Triple-DES cipher by default, if I'm not entirely mistaken.
> >
> > Try "scp -c blowfish ..."
> >
> > If you get ~1000 kB/s on ftp on a 100 Mbit switched LAN, that's bad too
> > and you should look into the causes of your networking problems.
> >
> > In a similar setup, I would see maybe ~5-6 MB on unencrypted local
> > traffic (on hosts on the same LAN).
> >
> > I tested scp'ing the Linux kernel (24 MB gzipped) to localhost on our
> > E220R (450 MHz CPU). It encrypted the package using 3DES on SSH1 at
> > less than 1000 kB/s, using IDEA at 1700 kB/s, and Blowfish at close
> > to 4000 kB/s. Doesn't explain why you only got <200 kB/s, however.
> >
> > Then again, I have very little experience on SSH2.
> >
> > > Compression doesn't help.
> >
> > That's normal. If you've read my recent postings on the list, you have
> > repeatedly heard that compression is an extra burden on the CPU that
> > can only help on really slow lines.
> >
> > mvh,
> >
> > --
> > Atro Tossavainen (Mr.) / The Institute of Biotechnology at
> > Systems Analyst, Techno-Amish & / the University of Helsinki, Finland,
> > +358-9-19158939 UNIX Dinosaur / employs me, but my opinions are my own.
> > < URL : http : / / www . iki . fi / atro . tossavainen / >
> >
>
>
>
> Hannes Niemi
> [EMAIL PROTECTED]
> puh: 09 457 2098
> Osoite: Tekniikantie 15a D, PL 405,
> 02101 ESPOO
>
>
>
