[p2p-hackers] UDP file transfer link speed identification

[David Barrett]

Saikat Guha wrote:
> On Thu, 2005-07-21 at 16:19 -0700, David Barrett wrote:
> 
>>Now, after the slow-start approach hit the ceiling and backed off some 
>>fraction, it could just restart with exponential growth again.  [...]
>>Thus rather than quickly shooting up to the 
>>ceiling with exponential growth, it just creeps up using linear growth 
>>until it experiences packet loss again.
> 
> In addition, if it just uses the exponential ramp-up and ramp-down then
> multiple TCPs do not converge to their fair-shares. Given the choice of
> multiplicative (M) and additive (A), increase (I) and decrease (D): I
> think only MIAD and AIMD converge to the full link bandwidth, and of
> that only AIMD converges to the fair share as well. [1]
> 
> [1] http://www.cse.ohio-state.edu/~jain/papers/ftp/cong_av.pdf

Ahh, good point.  Thanks for bringing that up.

-david