Re: Aspera SCP software

[Ben <bda20 cam ac uk>]

On Mon, 16 May 2005, Ed Wilts wrote:

> We're currently looking at the Aspera SCP software for intercontinental 
> file transfers.  Our initial tests have been successful (and much faster 
> than FTP) but I'd like to know if anybody else is running it and what the 
> opinions of both the company and product are.

So far the only thing I can see that Aspera SCP does that OpenSSH's scp 
doesn't is cost money.

"The same application sustains 1 Mbps file transfers over T1 links, and 
200-300 Mbps transfers over high-speed dedicated circuits, independent of 
network conditions."

I asked some people who know a bit more about TCP than I do about this 
page:

 http://www.asperasoft.com/technology-fasp.html

and it seems it contains some blatantly false statements about TCP:

 "When TCP's rate is self-limited on an uncongested link, FASP detects the
 unclaimed bandwidth and ramps up to fill it".

This sounds like someone who thought that congestion collapse doesn't apply 
to them.  Personally it all sounds a bit dubious to be and I can't see why 
you wouldn't use OpenSSH.

Ben
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