On Thu, Sep 03, 2015 at 05:48:00PM +0300, Saku Ytti wrote:
Hey Brett,
Here's a paper that shows you don't need buffers equal to bandwidth*delay to get near capacity: http://www.cs.bu.edu/~matta/Papers/hstcp-globecom04.pdf (I'm not endorsing it. Just pointing out it out as a datapoint.)
Quick glance makes me believe the S and D nodes are equal bandwidth, but only R1-R2 bandwidth is explicitly stated.S1, D1, Sn, Dn are only ever mentioned in the topology. If Sender is same or lower rate than Destination, then we really shouldn't need almost any buffering.
Unless Sender is higher than R1-R2.
Issue should only come when Sender is significantly higher rate than Destination and network is not limiting them.
I didn't read it in detail either, but at first glance, it appears to me that the model is infinite bandwidth and zero latency between S and R1, and D and R2, with queueing happening in R1. That's not going to give materially different results than, having S-R1 be 4 times R1-R2, and R2-D being the same as R1-R2. So it fits well with the original discussion here of 40G into 10G. -- Brett