[Mini-NDN] Topology angles and radius & Interest-Data Packets' metrics

[Saurab Dulal (sdulal)]

________________________________
From: Mini-NDN <mini-ndn-bounces at lists.cs.ucla.edu> on behalf of Lan Wang (lanwang) <lanwang at memphis.edu>
Sent: Thursday, June 10, 2021 9:38 AM
To: Junxiao Shi via Mini-NDN <mini-ndn at lists.cs.ucla.edu>
Subject: [Mini-NDN] Topology angles and radius & Interest-Data Packets' metrics

From: Αστεριος Παρλιτσης <asteparl at ee.duth.gr<mailto:asteparl at ee.duth.gr>>
Subject: Topology angles and radius & Interest-Data Packets' metrics
Date: June 10, 2021 at 6:39:43 AM CDT
To: mini-ndn at lists.cs.ucla.edu<mailto:mini-ndn at lists.cs.ucla.edu>



Hello, I am new to Mini-NDN and I have two issues with my experiments:

1) I want to run some instances of simple topologies with 20+ nodes but don't really get the hyperbolic coordinates' function and how to produce them for my own topologies. Is it possible or usefull in my case to disable the radius and angle parameters since I don't use hyperbolic routing strategies?


- You really don't have to use hyperbolic topology unless you are doing experiments with hyperbolic routing. And yes, you can remove radius and angles from the current example topologies<https://github.com/named-data/mini-ndn/tree/master/topologies>. Your topology can have the following structure without hyperbolic coordinates.


[nodes]
a:
b:
[links]
a:b delay=10ms


2) I have assigned to some nodes the roles of consumers and producers by running the examples provided by the ndn-cxx libraries on each one of them. What I need is a way to measure the delay of the Data Packet from the moment a node requests a packet by sending an Interest. I have already tried placing timers in the consumer.cpp but somehow the output is smaller than the link's delay so I got that wrong.


- If packet retrieval time is smaller than the link delay, it is highly likely that the packet might have been serverd from the local nfd's cache. Please enable the nfd-logs, look at the consumer's log specifically, and see if local nfd is sending back the cached data or not.


To set debug nfd log from the experiment: "AppManager(self.ndn, self.ndn.net.hosts, Nfd, logLevel='DEBUG')"


Thanks a lot,
Sergio




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