[chord] Chord Simulator

[Edward Tsai]

Hi Frank,

You mean the new simulator as in the new p2p simulator? I think I'll need /
want some more control over the network topology and configuration that ns2
or qualnet provides to give concrete results for a simulation.

Do you forsee any difficulty in doing a ns-2 / qualnet port? should I start
with the simulation code or the normal Chord code?

Thanks again :)

-Edward

-----Original Message-----
From: Frank Dabek [mailto:fdabek at MIT.EDU]
Sent: Tuesday, October 07, 2003 2:24 PM
To: Edward Tsai
Cc: Thomer M. Gil; chord at amsterdam.lcs.mit.edu
Subject: RE: [chord] Chord Simulator


Edward,

	I suspect that the "new" simulator does, or will do, most of the
end-to-end packet-level simulation you need: delays, drops, etc. Unless
you want to study something inside the network (Chord's effect on queue
lengths at routers, perhaps) I think that a port to ns may be
unnecessary.

--Frank

On Tue, 2003-10-07 at 14:08, Edward Tsai wrote:
> Hi Thomer,
>
> I see - what I plan to do is "port" over Chord into Qualnet or ns-2 and
run
> some simulations of Chord interactions, packet info, etc.
>
> I am currently looking into both the simulator code and the real Chord
> code - I understand that Chord runs on top of sfs  / seems to use a db -
I'm
> not too clear on how that effects the "portability" of Chord into a
> simulator, but I'll be spending lots of time looking at that this week.
>
> Do you have any suggestions / comments on the feasibility on doing this or
> perhaps some of the key issues I should be aware of before going half way
> into this quarter and realizing it may be quite almost impossible to
> implement / port Chord in a certain way into the simulators (which I
doubt,
> but then again, to be safe :) )...
>
> Thanks again!
>
> -Edward
>
> -----Original Message-----
> From: Thomer M. Gil [mailto:thomer at thomer.com]On Behalf Of Thomer M. Gil
> Sent: Tuesday, September 30, 2003 7:23 PM
> To: Edward Tsai
> Cc: chord at amsterdam.lcs.mit.edu
> Subject: Re: [chord] Chord Simulator
>
>
> Hi Edward,
>
>
> So obviously there is confusion.  There are two simulators.  One that
> exclusively simulates chord (it's in the simulator/ directory); this is
> the one that Michael Walfish was referring to in his reply.
>
> I was referring to the simulator in p2psim/, that, once we're a bit
> further down the road, will simulate more than just Chord.
>
> Hope that helps,
>
> Thomer
>
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