Subject: [ledbat] regarding intra-protocol fairness

From: Rolf Winter <[email-masked]>
Date: Thu, 17 Feb 2011 13:47:22 +0000

Hi,

<chair's hat off> 

picking up the point about intra-protocol fairness. In general intra-protocol fairness does not seem to be the biggest issue:

1) assuming multiple flows work on downloading the same file (as one example of using LEDBAT), then the aggregate is of interest, not that each individual flow get's an equal share.

2) assuming multiple flows work on downloading multiple files, then one download will be faster than others (apps can deal with this, esp. as we now allow to have targets lower (but not higher) than 100ms, so users can set priorities this way - other trivial mechanisms are of course conceivable)

3) assuming multiple apps compete (people having more than one teenager in the household might experience this situation), then one app might be starved, this is not nice, but I don't think we can or should solve this. 

At this point in time I think input from the BitTorrent folks would be really useful. In their absence, I think intra-protocol fairness is not our biggest concern.

Best,

Rolf

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