[e2e] Is a non-TCP solution dead?

[George Michaelson]

On Wed, 02 Apr 2003 22:44:20 +0100 Jon Crowcroft <Jon.Crowcroft at cl.cam.ac.uk>
wrote: 
> where's the code
> repeat  after me - if its a delta, and the performance gain is more
> than epslion, and the pain is less than iota
> why doesnt everyone use it>?
> 
> tcp = proof of the pudding.
>  cheers
> 
>    jon


ftam was shown to get 75% of ftp throughput. that was one implementation.
given time, I suspect it could have achieved the same throughput. As to
whether the transport or its end-to-endness could have scaled better to
current network behaviours I am less sure, but I think there stands the
example that even approaching the slope of the line, if the pain is not less
than iota, its just not going to happen.

interesting to look at what pragmatic decisions we make in apps-space. 

	Hands up how many of you use rsync and rsync/ssh to do things
	which http and ftp claim to 'own' -?

applications-space datagram protocol with checksum over end-to-end reliable
transport wins again!

-George

-- 
George Michaelson       |  APNIC
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