[P2PSIP] Self-tuning DHT for P2PSIP

[Jouni Mäenpää <jouni.maenpaa at nomadiclab.com>]

Hi,

As pointed out in [1], DHT-based overlays usually need to be configured
statically (e.g. by assuming a certain churn level and network size).
The problem is setting the parameters so that the overlay achieves the
desired reliability and performance even in challenging conditions, such
as under heavy churn. This naturally results in high cost in the common
case or alternatively, poor performance or even network partitioning in
worse than expected conditions. This kind of hand-tuning rarely works in
real settings because it requires perfect knowledge about the future.

In my opinion, the P2PSIP WG should specify a self-tuning DHT algorithm
 which would adapt to the operating conditions (e.g. network size and
churn rate). This would make it possible to use the DHT in a wide range
of environments instead of e.g. only small-scale low-churn networks.

Any comments?

Jouni

[1] R. Mahajan, M. Castro, and A. Rowstron. Controlling the cost of
reliability in peer-to-peer overlays. In IPTPS, 2003

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