[zeromq-dev] QoS support

Martin Sustrik sustrik at 250bpm.com
Tue Nov 17 10:09:48 CET 2009

Steven McCoy wrote:
> 2009/11/14 Martin Sustrik <sustrik at 250bpm.com <mailto:sustrik at 250bpm.com>>
>     I must admit I have no straightforward answer at the moment. Do you have
>     any idea of how the thing should be implemented?
> Aside from SCTP which tries to solve this issue you can have a look at 
> SPDY, an attempt to introduce fine grained framing ontop of TCP to 
> replace HTTP pipelines:
> http://dev.chromium.org/spdy/spdy-protocol

Actually, I recall Randall Steward (the principal author of SCTP) 
mentioning that even with SCTP you can experience head-of-line blocking 
and thus it makes sense to split large messages on application level. 
I've forgot what the reasoning was though.


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