Arnaud Legout wrote:
[Should we limit the cross posting? I believe sending this thread to
4 mailing lists is too much (may be this is because I am subscribed
to all four)]
[... I took p2pi off; I suspect that a lot of this discussion is
pertinent to p2p-hackers. Unless I hear from that list's moderator
otherwise we can continue to include them (many from p2p-hackers
may not be subscribed to the IETF lists.) ...]
First off, thanks for reading the draft.
Next ...
here is some feeback based on what we did in [Le Blond].
section 3 We show that we can achieve much higher savings than 80% of
reduction. [...]
OK; noted.
section 4 we explain the relation between peers download completion
time and network congestion. [...]
Similarly noted; thanks.
section 8.1 you write that we did simulations. We did not, we did
experiments with real BitTorrent clients.
OK, we will correct that.
section 8.2 it is not clear what you mean in "as shown in [Le Blond],
the right balance of randomness and locality depends on the P2P
algorithm". We did not explore several P2P protocols, but only
BitTorrent. We show that BT is extremely robust to high locality (as
long as there is enough randomness within each ISP). We cannot
conclude for any other P2P protocol.
Sure; we will correct and restrict the offending text accordingly.
"On the other hand, P2P systems not adopting the tit-for-tat approach
(e.g. the eDonkey network) should not be damaged by locality-based"
It is not clear to me. Peer selection (tit-for-tat like choking algo
in BT) is not the only one factor of efficiency, there is also piece
diversity. Edonkey/emule also use rarest first (but a less efficient
peer selection algorithm). Therefore, as locality adversely impact
piece diversity, my bet is that Edonkey/emule will suffer from
locality.
OK; we had clearly not considered piece diversity here.
Thanks, Arnaud.
- vijay
--
Vijay K. Gurbani, Bell Laboratories, Alcatel-Lucent
1960 Lucent Lane, Rm. 9C-533, Naperville, Illinois 60566 (USA)
Email: v...@{alcatel-lucent.com,bell-labs.com,acm.org}
Web: http://ect.bell-labs.com/who/vkg/
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