p2psp team mailing list archive

[Ilshat Shakirov <im.shakirov@xxxxxxxxx>]

>
> Well, the output seems to be OK, but I cannot see the list of peers.

I have prepared new log file -
https://www.dropbox.com/s/888pro42z02r8ww/log_50peers_buffers_peerlist.txt?dl=0

Could you please tell me more about an order in which peers must send
chunks? In peersim implementation it simply round robin, i.e. if peer have
peers number 4,2,1, he will send chunks in the same order (splitter will do
the same).

ps Should I prepare the guide, how to perform experiments with
p2psp-peersim? And what experiments should be performed (what parameters
should I use?).

2015-03-19 2:54 GMT+05:00 Vicente Gonzalez <vicente.gonzalez.ruiz@xxxxxxxxx>
:

>
>
> 2015-03-18 3:55 GMT+01:00 Ilshat Shakirov <im.shakirov@xxxxxxxxx>:
>
>> Hello!,
>>
>
> Hi!
>
>
>>
>> Yes, trusted peer and attacker have always the same position (attacker -
>> 1, TP - 2), but this doesn't affect on the result because of random
>> latencies. Splitter always have peer list in random order because of
>> latencies.
>>
>
> I believe you (that the positions of the peer in the list of peers are
> random), but I don't think that the reason is that the latencies are also
> random. This should affect slightly the order in which the peer's buffers
> are filled, but not to the order in which peers send the chunks. This order
> (the peer ordering in the list) is responsible of the "protocolol latency":
> some peers are going to fill up their buffers almost in a perfect order and
> others with large gaps (almost randomly) and this can determine the number
> of chunks that the attacker can send before it is detected by the trusted
> peer. Sorry, this is the only reason I can imagine that explains why the
> simulations do not show the expected results :-/
>
>
>> Here's log file of experiment with 50 peers.
>> https://www.dropbox.com/s/cy2ljkacbs605c3/log_50peers.txt?dl=0 - 100
>> experiments, 50 peers, with buffers (48 Mb)
>>
>> https://www.dropbox.com/s/rmiet1vby1f46hf/avg_posioned_chunks_a1_t1_p50.txt?dl=0
>> - 100 experiments, 50 peers, without buffers (167 Kb)
>> When I prepared the results, I simply 'grepped' the strings with regex
>> and paste it in google sheet.
>>
>
> Well, the output seems to be OK, but I cannot see the list of peers.
>
> Best,
> Vi.
>
> --
> Vicente González Ruiz
> Depto de Informática
> Escuela Técnica Superior de Ingeniería
> Universidad de Almería
>
> Carretera Sacramento S/N
> 04120, La Cañada de San Urbano
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>
> e-mail: vruiz@xxxxxx
> http://www.ual.es/~vruiz
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>