[zeromq-dev] Design Question

[Andy Ballingall TF]

On 18 January 2013 15:14, Nishant Mittal <nmittal at rblt.com> wrote:

> I have 3 workers (REP) connected to a DLR socket. each worker takes a msg,
> processes and responds... however, as the DLR socket fair-queues.. requests
> are sent like this...
> 1st -> 1st worker
> 2nd -> 2nd worker
> 3rd -> 3rd worker
> 4th -> 1st worker
>
> problem is if the 1st worker is still busy with the 1st request the 4th
> request waits... even if the 2nd and 3rd workers are free. I am "guessing"
> its because of the receive buffer on the REP socket..
>
> is it possible to fix this by setting the ZMQ_RCVHWM to 0?
>
>
I'm not sure if it will help your use case, but have you read through the
load balancing example in the guide?

http://zguide.zeromq.org/page:all#A-Load-Balancing-Message-Broker

Workers are only given work to do if they are free, so you never get the
problem of some workers having a queue of things to process while others
are idle.

Andy





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Andy Ballingall
Senior Software Engineer

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