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

Ryan Caudy caudy at jhu.edu
Fri Apr 4 16:53:02 EST 2003

What kind of configuration (spread.conf) are you using?  What is your 
flow control mechanism like?  Spread can do considerably better than this.


Guy Argo wrote:
> I'm using Spread (under python) for a file delivery system.
> Basically I want to deliver several large files to multiple destinations
> simultaneously preferably multicasting them to minimize
> network usage. I attached my crude little python test bed.
> I got it to work and tested it on two machines on the same
> subnet and the performance was underwhelming.
> I achieved sustained throughput of 40KB/s for data sent using
> multicast with RELIABLE_MESS and FIFO_MESS protocols.
> The machines both have 100 Mb cards.
> FTP achieved 600 KB/s.
> Do you have any recommendations about how to tune
> Spread to increase the performance?
> I couldn't find anything in the doc. :(
> ---
> Guy Argo <gargo at looksmart.net> ph +1 415 348 7683
> Director, Production Engineering 
> LookSmart Ltd., 625 2nd St., SF CA 94107
>  <<pushpull.py>> 

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