[Mini-NDN] namespace scope

[Ashlesh Gawande (agawande)]

Another idea could be to run ndndump on each node and check on which node the data appears first?

Example: https://redmine.named-data.net/issues/4436#note-1

Ashlesh

On 11/15/18 1:34 AM, sepehr abdous wrote:
I looked into nfd.log in 3 levels(INFO, DEBUG, TRACE) but I could not find log messages like you mentioned.
my topology was a -- b -- c -- d
and I used the following commands:

a nfdc cs config admit off
b nfdc cs config admit off
c nfdc cs config admit off
d nfdc cs config admit off
a echo "sepehr sepehr" > sepehr
a ndnputchunks ndn:/sepehr < sepehr &
a nlsrc advertise /sepehr
d ndncatchunks -d iterative ndn:/sepehr
quit

is there any specific info that I am missing?

Best,
Sepehr

On Wed, Nov 14, 2018 at 3:05 AM Muktadir R Chowdhury (mrchwdhr) <mrchwdhr at memphis.edu<mailto:mrchwdhr at memphis.edu>> wrote:

If you have 4 nodes and you know which one is sending the Interest, then you need to look into other three nodes' nfd.log. In one of the node's, which is actually serving the file, nfd.log you should be able to see something like "received Interest /a" and  "sending data for interest /a". Look for these log messages.


-Muktadir

________________________________
From: sepehr abdous <sepehrabdous1375 at gmail.com<mailto:sepehrabdous1375 at gmail.com>>
Sent: Wednesday, November 14, 2018 4:29:26 AM
To: Muktadir R Chowdhury (mrchwdhr)
Cc: mini-ndn at lists.cs.ucla.edu<mailto:mini-ndn at lists.cs.ucla.edu>
Subject: Re: [Mini-NDN] namespace scope

Thank you for your guide about advertise.

I still need to know the source of file in my simulation. In other words if for instance 4 nodes have the file f, I need to know which one is sending me the f.

I looked into nfd.log and nlsr.log but nothing seemed to be useful for me? when I use ndncatchunks in node c, nothing written in nlsr.log and nfd.log can be used to find the source of file?

any ideas?

Best,
Sepehr

On Mon, Nov 12, 2018 at 1:29 AM Muktadir R Chowdhury (mrchwdhr) <mrchwdhr at memphis.edu<mailto:mrchwdhr at memphis.edu>> wrote:


what namespace should I use so that d be able to fetch f1 from a and I don't encounter noRoute error when I am using ndncatchunks in d?

Whatever name prefix you used to put the data in "a" using ndnpuchunks. You need to add route<http://named-data.net/doc/NFD/current/manpages/nfdc-route.html> for that name prefix so that NFD knows where to forward Interest for this prefix. If "a" has the data, then need to add route from "b" to "a", "c" to "b", and "d" to "c".

Alternatively, if you are using NLSR then you can just add the name prefix in "a" using nlsrc advertise <https://named-data.net/doc/NLSR/0.4.0/manpages/nlsrc.html> . Then nlsr will take care of the rest. If you have a large topology then this is what you should do.


Also is there any way to understand which node is actually sending you the datapacket?

I don't think there is an easy way, other than to inspect the nfd.log on each node, since NDN is server agnostic.

-Muktadir


________________________________
From: Mini-NDN <mini-ndn-bounces at lists.cs.ucla.edu<mailto:mini-ndn-bounces at lists.cs.ucla.edu>> on behalf of sepehr abdous <sepehrabdous1375 at gmail.com<mailto:sepehrabdous1375 at gmail.com>>
Sent: Sunday, November 11, 2018 2:19:53 PM
To: mini-ndn at lists.cs.ucla.edu<mailto:mini-ndn at lists.cs.ucla.edu>
Subject: [Mini-NDN] namespace scope

Hello all
I have a topology a -- b -- c -- d.
I put f1 in a using ndnputchunks.
what namespace should I use so that d be able to fetch f1 from a and I don't encounter noRoute error when I am using ndncatchunks in d?

Also is there any way to understand which node is actually sending you the datapacket? lets say we have a large topology and multiple nodes have cached f1 and d is requesting f1, Is there any way to know which node is sending you the f1?

Best,
Sepehr


--
Sepehr Abdous
Faculty: abdous at ce.sharif.edu<mailto:abdous at ce.sharif.edu>
Yahoo mail: sepehrabdous at yahoo.com<mailto:sepehrabdous at yahoo.com>
Cellphone:+989129751873
School of computer engineering
Sharif University of Technology
Tehran, Iran


--
Sepehr Abdous
Faculty: abdous at ce.sharif.edu<mailto:abdous at ce.sharif.edu>
Yahoo mail: sepehrabdous at yahoo.com<mailto:sepehrabdous at yahoo.com>
Cellphone:+989129751873
School of computer engineering
Sharif University of Technology
Tehran, Iran



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