[ale] sshd resource intensive??

[esoteric at 3times25.net (Geoffrey)]

Drag0n wrote:
> Considering that the sender has to encrypt the data on the fly and the
> receiver has to decrypt it as it receives it, processor speed more than
> bandwidth determines throughput on local networks. This is to be
> expected unless you have dedicated ssl accelerators in each machine that
> ssh has been configured to use.
> 
> Drag0n
> dragon at atlantacon.org  
> 
> On Sat, 2004-05-15 at 22:31, Geoffrey wrote:
> 
>>I have never put any thought to how resource intensive scp might be. 
>>Until now.  I was setting up a couple of boxes and testing file transfer 
>>rates.  I've noted that for a couple of older boxes (p200 and PII 350) 
>>it's much slower.  I then fired up top while the transfer was going 
>>along and noted sshd taking up quite a bit of cpu.

I surely expected some degradation in transmission because of the ssh 
overhead, but certainly not 8000%.  11 seconds to transfer a 125M file 
from an athlon 2400+ to pentium IV 2.4G, verses 92 seconds to transfer 
the same file from the athlon to a PII 350.

You learn something new every day..

-- 
Until later, Geoffrey                     Registered Linux User #108567
Building secure systems in spite of Microsoft