[Spread-users] Tuning spread's performance for multicast

Yair Amir yairamir at cnds.jhu.edu
Fri Apr 4 18:12:31 EST 2003


I know other people already answered that however, the
straight-forward way for you to check things is to run flooder.

I would note that you should get throughput of 40-80Mbits/sec
(about 1000 times faster than what you see) if you setup and use
Spread properly.


       :) Yair.
On Friday, April 04, 2003 3:37 PM
Guy Argo gargo at looksmart.net wrote:

Guy> I'm using Spread (under python) for a file delivery system.
Guy> Basically I want to deliver several large files to multiple destinations
Guy> simultaneously preferably multicasting them to minimize
Guy> network usage. I attached my crude little python test bed.

Guy> I got it to work and tested it on two machines on the same
Guy> subnet and the performance was underwhelming.
Guy> I achieved sustained throughput of 40KB/s for data sent using
Guy> multicast with RELIABLE_MESS and FIFO_MESS protocols.
Guy> The machines both have 100 Mb cards.
Guy> FTP achieved 600 KB/s.
Guy> Do you have any recommendations about how to tune
Guy> Spread to increase the performance?

Guy> I couldn't find anything in the doc. :(

Guy> ---
Guy> Guy Argo <gargo at looksmart.net> ph +1 415 348 7683
Guy> Director, Production Engineering 
Guy> LookSmart Ltd., 625 2nd St., SF CA 94107

Guy>  <<pushpull.py>> 

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