[zeromq-dev] ZMTP/1.1 - proposal

Martin Sustrik sustrik at 250bpm.com
Thu May 19 11:21:12 CEST 2011

On 05/19/2011 11:17 AM, Pieter Hintjens wrote:

>> Another way would be to add this kind of session layer for multiplexing
>> directly into zeromq, since  SPDY implementations are very rare.
> Well, multiplexing seems like a good idea but in practice... we've not
> had great experience with it. I'd probably use it only for bridging.

While multiplexing on top of TCP looks nice at the first sight, it 
collapses once congestion hits.

Propagation of backpressure via such protocol (say because HWM was 
reached on the receiver side) is going to block all the streams, even 
those that are not congested.


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