[Nfd-dev] the impact of cs_size on NFD tool,chunks

[Klaus Schneider]

Try to increase the maximum number of retransmission (see ndncatchunks -h).

Also, don't forget to reply to the mailing list.


Klaus


On 12/03/18 20:28, 小杰许 wrote:
> Received segment #1453, rtt=5.49855ms, rto=4000ms
> Requesting segment #1491
> Received segment #1454, rtt=5.60058ms, rto=4000ms
> Requesting segment #1492
> Received segment #1455, rtt=5.79346ms, rto=4000ms
> Requesting segment #1493
> Received segment #1456, rtt=5.89634ms, rto=4000ms
> Requesting segment #1494
> Received segment #1457, rtt=27.1729ms, rto=4000ms
> Requesting segment #1495
> Received segment #1458, rtt=27.2957ms, rto=4000ms
> Requesting segment #1496
> Received segment #1459, rtt=30.2032ms, rto=4000ms
> Requesting segment #1497
> Received segment #1460, rtt=30.3846ms, rto=4000ms
> Requesting segment #1498
> Received segment #1461, rtt=30.5432ms, rto=4000ms
> Requesting segment #1499
> Received segment #1462, rtt=30.6773ms,Retransmitting segment #868
> Retransmitting segment #860
> # of retries for segment #860 is 2
> Retransmitting segment #852
> # of retries for segment #852 is 2
> Retransmitting segment #851
> # of retries for segment #851 is 2
> Retransmitting segment #836
> # of retries for segment #836 is 2
> Retransmitting segment #793
> # of retries for segment #793 is 3
> Retransmitting segment #471
> ERROR: Reached the maximum number of retries (3) while retrieving 
> segment #471
> 
> 
> 
> the chunks number of the video is 4751
> 
> I use ndncatchunks /ndn > /home/harold/panda.avi. But the video can't play.
> 
> Thanks!
> 
> 2018-03-13 10:22 GMT+08:00 Klaus Schneider <klaus at cs.arizona.edu 
> <mailto:klaus at cs.arizona.edu>>:
> 
> 
> 
>     On 12/03/18 18:19, 小杰许 wrote:
> 
>         The topology is like  two clients(without cs)---one
>         NFDrouter(with cs)----server(without cs).
> 
> 
>     What's the RTT?
> 
> 
>         And I set the cs_size of NFDrouter from 1000 to 5000.
>         (1000,2000,3000,4000,5000).
> 
> 
>     Is that number of packets?
> 
>     How many chunks is your video file? It might not be much more than 1000.
> 
> 
>         the command on the server is
> 
>         ndnputchunks -v /ndn < /home/b/panda.avi
> 
>         (here panda.avi is a clip of video, it's 20Mb)
> 
>         the command on the client is
> 
>         ndncatchunks -v /ndn.
> 
> 
>     Maybe remove the "-v". The console output might be the performance
>     bottleneck.
> 
> 
> 
> 
>         I run one of the consumer first, after it finished, I run
>         another one.
> 
>         the goodput of the first consumer is 5Mbit/s, the second one is
>         random, sometimes higher than 5Mbit/s,and sometimes lower than
>         5Mbit/s. I think with the cache in the middle NFDtouter, the
>         goodput of the second client could be better all the time, but
>         it's not.
> 
>         And with the increase of the cs_size, there is not linear change
>         of the clients' goodput.
> 
>         BTW, the ndncatchunks in the collapse more than half time when I
>         run, and with messy code (cause the file is a video?) in the
>         terminal. With the file (.txt), I got ERROR (retry(3).........).
> 
> 
>     Please copy the summary output here. Also for the runs that worked.
> 
>     Best regards,
>     Klaus
> 
> 
> 
>         Yours,
>         Junjie
> 
> 
> 
> 
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