On 2009-6-3, at 21:14, Salman Abdul Baset wrote:
Your congestion example is spot on. Provisioned link capacity (upstream and downstream) is not very helpful for peer selection unless the currentload on the link is considered.
Agreed, but I understood that that was the information you were trying to propose for ALTO.
As I mentioned to Enrico, spare capacity, computed from provisioned linkcapacity and current load, can guide peer selection.
Even if you could do this computation (which is difficult enough, because traffic at the access router may arrive form multiple different nodes in the local network, not just the box the P2P client is running on), you still only get a potential upper bound. Whether you will actually be able to use all or even most of that computed spare capacity will entirely depend on whether the access link happens to be the bottleneck resource of the path to the peer you end up choosing.
Lars
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