[e2e] Open the floodgate - back to 1st principles

Craig Partridge craig at bbn.com
Thu Apr 29 14:07:15 PDT 2004


In message <4350000.1082946807 at localhost>, Guy T Almes writes:

>  My impression is that, at least during the early 1990s and probably since 
>then, there was a rule of thumb that a router should have a delay-bandwidth 
>worth of memory per output port.  This was understood to be friendly to TCP 
>in that it would allow the buffer to drain while the TCP sender recovered 
>itself from a stumble following the bursting of the queue.

Also relates to the fact that the VJ algorithm will overshoot the target
bandwidth by a factor of 2 in slow start (i.e., when you get the loss
indication, you're transmitting at 2X bottleneck).

Craig


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