Slow PSCP Transfer Rate

From: Steve Bassler (bassmstr.delete.this.to.reply_at_adelphia.net)
Date: 12/25/03 

Date: Thu, 25 Dec 2003 03:37:00 GMT

I am running OpenSSH 3.7.1 on several AIX servers and PuTTY 0.53b on the
client side (Windows 2000 on an IBM Thinkpad). I occasionally use pscp to
transfer files to my servers and have noticed that the transfer rate is
much slower than FTP. We're talking maybe 10-20 K per second over 10/100
adapters running 100 full duplex. I've never bothered to ask about it
because my file transfers are typically pretty small and few and far
between.

However, I recently had a user uploading the contents of a CD and he asked
me why pscp was so slow on his laptop as compared from his desktop PC!!
Apparently from his desktop the transfer speed was much more comparable to
FTP. They are both connected to the same subnet and switch, so any
difference would have to be in the client Ethernet adapters, right?

Over the next year, I am going to be making a concerted effort to disable
telnet and FTP wherever possible, and I need to know what's going on here
before I can seriously push SSH, SFTP, and SCP. Any ideas?

Thanks,
Steve

Steve Bassler
Systems Programmer
Allegheny Energy
Greensburg, PA, USA

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