p2psp team mailing list archive

[Ilshat Shakirov <im.shakirov@xxxxxxxxx>]

Hello!,

During the simulation number of nodes is constant.
Simulation data is gathered every n ticks of simulation. So the nodes have
n ticks to connect with each other to organize team.
Module for computing number of poisoned chunks gather data from each node
(from all network). The size of team is not constant since we can exclude
malicious peers.

Regarding lost chunks, no, in current impl chunks couldnt be lost.

Thanks for the questions! =)

2015-04-07 11:00 GMT+05:00 Vicente Gonzalez <vicente.gonzalez.ruiz@xxxxxxxxx
>:

> Hi Ilshat,
>
> As you pointed out before, the team should be stable (churn is not
> allowed) in order to apply your mathematical model (which I think is
> correct!). How are you solving this issue in your simulator? Do you gather
> the simulation data only when the team has all the peers and none of them
> leaves the team (the team has always the same number of peers)? I remember
> also that we spoke about some chunks could be lost, does this happen in
> your simulations?
>
> (Sorry, I haven't had enough time to revise your code :-()
>
> Thanks,
> Vi.
>
> On Mon, Apr 6, 2015 at 12:27 PM Ilshat Shakirov <im.shakirov@xxxxxxxxx>
> wrote:
>
>> Ready! =)
>> https://github.com/P2PSP/sim/pull/4
>>
>> 2015-04-06 15:01 GMT+05:00 Cristóbal Medina López <
>> cristobalmedinalopez@xxxxxxxxx>:
>>
>>> Hi,
>>>
>>> I mean this: http://pastie.org/private/wu1aoi7fnfazwedli88q
>>> (expected.py). I think it's useful and maybe is a good idea to store it
>>> in utils directory.
>>>
>>> Regards.
>>>
>>>
>>>
>>> El lun., 6 de abril de 2015 a las 11:48, Ilshat Shakirov (<
>>> im.shakirov@xxxxxxxxx>) escribió:
>>>
>>>> Hello!,
>>>>
>>>> Are you about script for computing value by formula? Or about log
>>>> parser? (average.py). If about log parser, it is already in repo -
>>>> https://github.com/P2PSP/sim/blob/master/utils/average.py .
>>>>
>>>>
>>>> 2015-04-06 14:41 GMT+05:00 Cristóbal Medina López <
>>>> cristobalmedinalopez@xxxxxxxxx>:
>>>>
>>>>> Hi Ilshat,
>>>>>
>>>>> Could you add the Python script for computing average number of
>>>>> poisoned chunks to the github repository?
>>>>>
>>>>> Thanks!!
>>>>>
>>>>> El lun., 6 de abril de 2015 a las 9:25, Vicente Gonzalez (<
>>>>> vicente.gonzalez.ruiz@xxxxxxxxx>) escribió:
>>>>>
>>>>>> Hi Ilshat,
>>>>>>
>>>>>> thanks for your guide. We really appreciate your efforts.
>>>>>>
>>>>>> Best,
>>>>>> Vi.
>>>>>>
>>>>>> On Sat, Apr 4, 2015 at 4:11 PM Ilshat Shakirov <im.shakirov@xxxxxxxxx>
>>>>>> wrote:
>>>>>>
>>>>>>> Hello!,
>>>>>>>
>>>>>>> I just prepared the new pull request : https://github.com/P2PSP/sim/
>>>>>>> pull/3
>>>>>>>
>>>>>>> Also, there is new result (with fix from previous mail) :
>>>>>>> https://docs.google.com/spreadsheets/d/
>>>>>>> 1pc6yb87xJy8gNkWSWvvCvjAjR6WBFdOzCbPvO-zEooU/edit#gid=506203193
>>>>>>> (result3 tab)
>>>>>>>
>>>>>>> As you can see, there is something strange in experiments with 50
>>>>>>> peers, and T>1. But now DIFF decreases with number of experiments (10 000
>>>>>>> instead of 1000 I have tested).
>>>>>>>
>>>>>>> Also, I prepared guide in README file, now you can perform
>>>>>>> experiments of your own, you need only JDK on local machine. You can change
>>>>>>> the number of trusted peers in attackers in next lines:
>>>>>>>
>>>>>>>> init.2.malicious_count 1
>>>>>>>> init.2.trusted_count 1
>>>>>>>>
>>>>>>> Also, you can change the size of the network in the fist line.
>>>>>>> And you can uncomment these lines to see all the information about
>>>>>>> network (peer's buffers and neighbors)
>>>>>>>
>>>>>>>> #control.0 sim.src.PeerObserver
>>>>>>>> #control.0.protocol 2
>>>>>>>> #control.0.step CYCLE*1
>>>>>>>>
>>>>>>> There is file sim/utils/average.py - it's a file for computing
>>>>>>> average value of poisoned chunks from many experiments. You simply should
>>>>>>> call it like 'python average.py -i log.txt'. Log.txt is a output from
>>>>>>> simulator.
>>>>>>>
>>>>>>> That's all, next I will try to investigate the strange values from
>>>>>>> simulator (with 50 peers).
>>>>>>>
>>>>>>> Thanks!
>>>>>>>
>>>>>>> 2015-04-03 10:03 GMT+05:00 Ilshat Shakirov <im.shakirov@xxxxxxxxx>:
>>>>>>>
>>>>>>>> Hello!,
>>>>>>>>
>>>>>>>> I found problem in the concept of simulation =)
>>>>>>>> The malicious peer connects to the team after some delay and it's a
>>>>>>>> problem. Because of that, i.e. with parameters N=9, T=6, A=3, splitter will
>>>>>>>> give the peer list with first trusted peers for attackers. And the result
>>>>>>>> will be 3. But expected is 3.4. And this is why the expected differs from
>>>>>>>> result.
>>>>>>>> I will fix it soon, and update the sheet. I think after this update
>>>>>>>> the DIFF rows must become equal to 0.00 =)
>>>>>>>>
>>>>>>>> Thanks for feedback!
>>>>>>>>
>>>>>>>> 2015-04-03 3:49 GMT+06:00 Vicente Gonzalez <
>>>>>>>> vicente.gonzalez.ruiz@xxxxxxxxx>:
>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> On Thu, Apr 2, 2015 at 10:19 AM Ilshat Shakirov <
>>>>>>>>> im.shakirov@xxxxxxxxx> wrote:
>>>>>>>>>
>>>>>>>>>> Hello!,
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Hello
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> I began fill the results to table - https://docs.google.com/
>>>>>>>>>> spreadsheets/d/1pc6yb87xJy8gNkWSWvvCvjAjR6WBF
>>>>>>>>>> dOzCbPvO-zEooU/edit#gid=506203193 (result3 tab)
>>>>>>>>>> I think formula works, but Im a little bit confused about diifs
>>>>>>>>>> 0,1-0,12. May be it's some bugs in stat gatherer module of simulator, maybe
>>>>>>>>>> there some mistake with formula.
>>>>>>>>>>
>>>>>>>>>> Soon, I will prepare scripts for running simulation without ide.
>>>>>>>>>> And I will attach log files (with each peer' buffers) to experiments.
>>>>>>>>>>
>>>>>>>>>> What do you think? =)
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Sorry, I don't know is there is a mistake somewhere (in any case,
>>>>>>>>> results are quite good). But I have a question. Does DIFF decrease with the
>>>>>>>>> number of experiments?
>>>>>>>>>
>>>>>>>>> Best,
>>>>>>>>> Vi.
>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>
>>