[ndnSIM] Question about OutData metric

[Muktadir R Chowdhury (mrchwdhr)]

Hi,

I have a 3x3 grid topology, where node#0 is consumer and node#8 is producer.

6 --- 7 ---- 8

 |      |        |

3 --- 4 ---- 5

 |      |        |

0 --- 1 ---- 2


Node#0 is sending two interest and getting data back. I have installed L3RateTracer in the nodes. Below is the the OutInterests and OutData stat from the trace file:


vagrant @ /vagrant/ndnSIM - ()

$ head -1 9-static-grid-clf-rate-trace.txt

Time    Node    FaceId  FaceDescr       Type    Packets Kilobytes       PacketRaw       KilobytesRaw

vagrant @ /vagrant/ndnSIM - ()

$ awk '{if($3==257) print $N}' 9-static-grid-broadcast-rate-trace.txt | grep -w OutInterests

4       0       257     netdev://[00:00:00:00:00:01]    OutInterests    0.4     0.0179688       2       0.0898438

4       1       257     netdev://[00:00:00:00:00:02]    OutInterests    0.4     0.0179688       2       0.0898438

4       2       257     netdev://[00:00:00:00:00:03]    OutInterests    0.4     0.0179688       2       0.0898438

4       3       257     netdev://[00:00:00:00:00:04]    OutInterests    0.4     0.0179688       2       0.0898438

4       4       257     netdev://[00:00:00:00:00:05]    OutInterests    0.4     0.0179688       2       0.0898438

4       5       257     netdev://[00:00:00:00:00:06]    OutInterests    0.4     0.0179688       2       0.0898438

4       6       257     netdev://[00:00:00:00:00:07]    OutInterests    0.4     0.0179688       2       0.0898438

4       7       257     netdev://[00:00:00:00:00:08]    OutInterests    0.4     0.0179688       2       0.0898438

4       8       257     netdev://[00:00:00:00:00:09]    OutInterests    0       0       0       0

vagrant @ /vagrant/ndnSIM - ()

$ awk '{if($3==257) print $N}' 9-static-grid-broadcast-rate-trace.txt | grep -w OutData

4       0       257     netdev://[00:00:00:00:00:01]    OutData 1.2     1.46133 6       7.30664

4       1       257     netdev://[00:00:00:00:00:02]    OutData 1.2     1.46133 6       7.30664

4       2       257     netdev://[00:00:00:00:00:03]    OutData 1.4     1.70488 7       8.52441

4       3       257     netdev://[00:00:00:00:00:04]    OutData 1.4     1.70488 7       8.52441

4       4       257     netdev://[00:00:00:00:00:05]    OutData 1.2     1.46133 6       7.30664

4       5       257     netdev://[00:00:00:00:00:06]    OutData 1.4     1.70488 7       8.52441

4       6       257     netdev://[00:00:00:00:00:07]    OutData 1.2     1.46133 6       7.30664

4       7       257     netdev://[00:00:00:00:00:08]    OutData 1.2     1.46133 6       7.30664

4       8       257     netdev://[00:00:00:00:00:09]    OutData 2.6     3.16621 13      15.8311

Each node is sending two interests which they are supposed to do. But my question is why each node is sending more than two data packets. I was assuming data count should be less or equal to interest count. Can someone please clarify the stat for the outgoing data is being collected?


-Muktadir
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