scp vs ftp performance on SGI IRIX????????

Ben Lindstrom mouring at
Fri Nov 7 03:45:46 EST 2003

On Thu, 6 Nov 2003, Jay Chen wrote:

> Hi,
> Running OpenSSH 3.5p1 or 3.7.1p2 on two SGI orgin 300 systems of IRIX
> 6.5.17 with
> 4 600MHz CPU and gigabits network.
> Transfer a 1GB file with ftp took 28 seconds.
> Transfer a 1GB file with scp took 148 seconds.

Which protocol? v1 or v2?  what encryption is used?

> What a difference! Why?

Could be as simple as the AIX server may be better at number crunching and
the IRIX box can't encrypt fast enough to keep up with the stream of data.

Good example is comparing a SS20 150mhz with a Intel 586 150mhz.  The SS20
even at the speed of 150mhz is extremely poor at doing encyption.  It was
shown clearly in early version of OpenSSH v2 key exchange where it would
"hang" for up to a minute and half.  The Intel box cranked it right out
and was done in less than half the time.

- Ben

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