[ndnSIM] limitations at router or channels?
susmit at cs.colostate.edu
Thu Jun 15 19:56:47 PDT 2017
Can you show us the code? How are you setting the CS size?
This page lists several nuances of the CS implementation, you might
want to read that.
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
>> 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
>> 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.
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