On Fri, Jul 31, 2009 at 12:09 PM, Keenan Tims<[email protected]> wrote:
>> then use "time scp /tmp/random otherhost:/tmp/blah" or use "netcat -l -p
>> 1234" on one to create a listen and on other "time cat /tmp/random |
>> netcat -p 1234 otherhost" to see how long it takes
>>
> scp doesn't perform well over fast links, it's not really a good tool
> for testing. I can barely get 100mbit out of my GigE network that
> otherwise performs well. I think it is due to the issue discussed here:
>
> http://www.psc.edu/networking/projects/hpn-ssh/

Most of the time, the real issue is that scp has to encrypt the data
on one end and decrypt it on the other - that takes a lot of CPU power
that could otherwise be used for tossing packets around.

-Dave

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