[mnet-devel] "One Hop Lookups for Peer-to-Peer Overlays"

[Some Guy]

Hey everyone.  I'm back!!!  I'll get my MNet node updated this weekend.

> "One Hop Lookups for Peer-to-Peer Overlays"
> Anjali Gupta, Barbara Liskov, Rodrigo Rodrigues
> 2003 or so
> http://www.pmg.lcs.mit.edu/~anjali/papers/onehop.pdf

I'm not sure I buy it.  They still want you to notify every node when you leave and enter the
system.  Sure you can use a broadcast tree so you don't have to do it, but the bandwidth still has
to be used to tell everyone when nodes join and leave.

There's also all the fun security issues I frett about.  If everyone knows who would have a piece
of data, they can flood attack a few nodes.  This may not be an issue for big files stored with
some redundancy.  Example: 4MB song store at x2 redundancy in 8,000 1kB pieces; the adversary
would have to attack 4001 machines.  Where it does hurt is if you have lots of little pieces of
data that all have to be reliably retrievable like entries in a metadata-database.

> I mention this because someone mentioned that he wanted to DHT-ify Mnet, and
> I think the "One Hop" DHT system described here is both better for our target
> environment and more similar to current Mnet.

Has anyone done any more work on a DHT-ify Mnet?  I remember you mentioning one hack day, you were
going to take some Chord code and try to build something crazy real quick.

By the way I've been trying to think of a better way to do things than the Grid/Ring of Trust.  I
know it'd be nice to think of something that doesn't require everyone to burn resources to limit
the bad guys.  The optimal thing would be to have nodes gain trust only by participating in the
network.  It's not to hard to do with a central authority, but you know I always have problems
with authority :-).

Chris


	

	
		
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