Re: LUG: Slow transfer using SFTP/SCP - Sat, 13 Mar 2010 15:27:18 -0500

Subject : Re: LUG: Slow transfer using SFTP/SCP

From : Edward Anderson <nilbus@gmail.[redacted]>

Date : Sat, 13 Mar 2010 15:27:18 -0500

Is it a single file you're transferring? If there are multiple files
that aren't in a tar archive or something similar, there will be
overhead time for each file. However, assuming a single file, ssh also
has to encrypt and decrypt everything that it transfer, unlike torrent
transfers. If the CPU is heavily taxed at either end, that will act as
a bottleneck. I've only experienced that with older computers. That's
the only reason I can think it might be.

Edward

On Mar 13, 2010, at 3:08 PM, "Daniel Underwood" <daniel.underwood@ncsu.[redacted]
> wrote:

> Something I don't understand... If I download, say, a Linux
> distribution from USENET or via a torrent, I can reach speeds around 1
> MB/s (RoadRunner at home). But using sftp/scp from my NCSU
> machine, I
> can only reach speeds around 100 KB/s. Why is this so? Any ideas?
> --
> Daniel Underwood
> North Carolina State University
> Graduate Student - Operations Research
> email: daniel.underwood@ncsu.[redacted]
> phone: XXX.302.3291
> web: http://www4.ncsu.edu/~djunderw/
>