[zeromq-dev] Fast transport layer -- UDT

Martin Sustrik sustrik at 250bpm.com
Wed Dec 2 20:40:10 CET 2009

Steven McCoy wrote:
> 2009/12/3 Erich Heine <sophacles at gmail.com>:
>> This transport protocol looks
>> interesting: http://udt.sourceforge.net/index.html
>> Any thoughts on applicability to 0mq? There is of course some overlap, but
>> they do some stuff that we had discussed in the QoS thread, and other stuff
>> relevant to the Linux End User Summit thread.
>   Briefly mentioned previously here,
> http://lists.zeromq.org/pipermail/zeromq-dev/2009-August/001186.html
> There are many Internet 2 spin-off projects for high speed long
> distance transfers because the current TCP flow control mechanism is
> too coarse for high latency links.

Yup. As for integration with 0MQ, the difference in scenarios should be 
on mind. 0MQ is designed for many small messages, UDT is designed for 
few large messages. Using UDT as an alternative transport for 0MQ is 
feasible, the question is whether it would scratch anybody's itch... in 
any case feel free to argue your point.


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