[PLUG] Incredibly Slow scp Across Local Ethernet

Jeme A Brelin jeme at brelin.net
Fri Jan 9 13:25:03 UTC 2004


On Fri, 9 Jan 2004, Paul Mullen wrote:
> The subject pretty much says it all. I've got two local machines (both
> Linux) directly connected via a cross-over cable. On one side is an 800
> MHz PPC, and the other a 120MHz Pentium. Networking seems to operate
> just fine, for the most part. I can ssh in to the Pentium from the PPC,
> and do all the usual shell-ish stuff. Transfering files via scp is
> unbearably slow, though. After the first ~500k the connection begins to
> "stall" (as reported by the scp status line), and never seems to make
> any further progress. Small files seem to be OK, but I've tried a 15 MB
> file and a ~300 MB file, both with no success. Any ideas?

It's the P120.  It's just too slow to handle the encryption.  Shell stuff
and small files are taking longer, but it's such a minor difference that
you don't notice.  (Can you tell the difference between .01ms response and
.04ms?)

Slow machines don't act like fast machines when doing lots of
calculations.

If you want fast file transfers, use something that doesn't do so much
number crunching.

J.
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     Jeme A Brelin
    jeme at brelin.net
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