[ndnSIM] limitations at router or channels?

[Susmit]

Can you show us the code? How are you setting the CS size?

This page[1] lists several nuances of the CS implementation, you might
want to read that.

[1] http://ndnsim.net/2.0/cs.html

On Thu, Jun 15, 2017 at 8:49 PM, John Baugh <jpbaugh at umich.edu> wrote:
> I'm still struggling with finding what is causing this behavior.
>
> Any suggestions would be welcome.
>
> Thank you all
>
>
>
> On Jun 15, 2017 5:32 AM, "John Baugh" <jpbaugh at umich.edu> wrote:
>>
>> Greetings friends,
>>
>> This is probably something simple, but I'm just not able to figure it out.
>>
>> I've created:
>>
>> 8 consumers
>>
>> All of their CS limits are set to 0 so they won't cache anything
>> themselves
>> This is to ensure that they will keep requesting the same objects over and
>> over again so I can look at the router's incoming frequency of interests
>>
>> 1 router
>>
>> This does have a CS limit set to a positive number (5, 10, etc. - doesn't
>> seem to matter)
>>
>> 1 producer
>> 2 "intermediate nodes" with neither a consumer or producer app helper
>> installed
>>
>> I've set their cache limit to 0, just like the consumers
>>
>> I run the app for 30 simulator seconds.
>>
>> Here is what I'm getting in 2 different scenarios:
>>
>> In scenario 1, I don't use the "intermediate nodes" at all.  I connect all
>> 8 consumers directly to the router, and then the router to the producer
>>
>> Given a rate of 30 (Frequency attribute set to 30), The frequency of
>> requests for the same content object coming in are 900 from each Face.  This
>> is what I expect.
>>
>> In scenario 2, I connect 4 consumers to intermediate node 1, and 4
>> consumers to intermediate node 2.  Then, the intermediate nodes are directly
>> connected to the "router", and the router is connected to the producer.
>>
>> Given the same rate (30), running the app for 30 seconds, and knowing that
>> I only have two incoming faces to the router (one from each intermediate
>> node), the frequency of requests for content objects coming in is 450 for
>> each of the links.
>>
>> While I suspect the "450" from each link * 2 = 900 has some connection to
>> this whole situation, I'm a little confused.  If each of the consumers is
>> requesting a content object at 30 / second, for 30 seconds, each consumer is
>> requesting that object 900 times.  This shouldn't change between scenarios 1
>> and 2.
>>
>> Therefore, if there are two links involved here, I expect the same overall
>> requests (8 consumers * 900 = 7,200 overall interests being received at the
>> router.  So half (3,600) should be coming in to Intermediate node 1, and
>> forwarded to the router, and the other have (3,600) should be coming in from
>> Intermediate node 2, and forwarded to the router.
>>
>> But in scenario (2), I'm only getting a total of 900 overall interests
>> received!  I tried modifying the link speed and other attributes like that
>> but it doesn't seem to do anything.
>>
>> Ideas?
>>
>> John
>
>
> _______________________________________________
> ndnSIM mailing list
> ndnSIM at lists.cs.ucla.edu
> http://www.lists.cs.ucla.edu/mailman/listinfo/ndnsim
>



-- 

====================================
http://www.cs.colostate.edu/~susmit
====================================