[Ndn-interest] Regarding RTT for ndncatchunks in raspberry pi

Athreya Nagaraj indiathreya92 at gmail.com
Sun Dec 29 19:58:04 PST 2019

Hi all

I have used the term 'bus topology', which is wrong. The topology I have
used is 4 raspberry pi devices connected via 3 point-to-point links in a
linear fashion. I've attached a representative topology diagram. I
apologize for my mistake.

Thanks and Regards
Athreya H N

On Sun, Dec 29, 2019 at 10:39 PM Athreya Nagaraj <indiathreya92 at gmail.com>

> Hi all
> I'm a student working on a testbed of NDN. The testbed consists of four
> raspberry pi connected in a bus topology. The two end devices act as
> producers and consumers for NDN data. The middle two devices act as
> routers. I use ndncatchunks to send a 100 MB file through the testbed. I
> observe that the RTT for this is significantly more (around 10 times more)
> than that for an FTP application on the same testbed. The throughput is
> also lesser compared to FTP (around 20% lesser for NDN). I was wondering
> what could cause this difference.
> Also, another observation I made was that when I was testing the testbed
> setup with ndnping, the RTT was not so high.
> I have also previously worked on similar topology with NDN and the
> machines used were desktop machines. In this case, NDN was better than FTP.
> Any thoughts on what could be causing this?
> Thanks and Regards
> Athreya H N
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