[zeromq-dev] Does ZeroMQ detect and optimize duplicate connections?

[Nathan Marz]

Besides the backpressure issue you brought up and the overhead of multiple
connections, are there any tradeoffs to consider between having one
connection to a host vs. many from the same process?



On Mon, May 23, 2011 at 11:57 PM, Martin Sustrik <sustrik at 250bpm.com> wrote:

> Hi Nathan,
>
>
>  If I make connections to the same host/port from two different threads
>> in the same process off the same ZeroMQ context, will ZeroMQ detect
>> this? I'm wondering if it will automatically optimize things by only
>> making one underlying connection to the target.
>>
>
> No. Merging multiple on a single TCP connection blocks all the feeds when
> one feed starts applying backpressure (say HWM is reached on receiving
> side). Not a good idea.
>
>
>  Otherwise, what are the implications, performance and otherwise, of
>> ZeroMQ connections?
>>
>
> Exactly the same as those of the underlying transport (TCP in this case).
>
> Martin
>



-- 
Twitter: @nathanmarz
http://nathanmarz.com
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