[zeromq-dev] Multiple sender to Multiple receivers

[Robert Zhang]

I apologize if I wasn't clear in my question. But receivers might not know
who all the global exchanges are. Number of publishers can grow and shrink,
the number of receivers can grow and shrink. They don't really know each
other and only thing they agree on is the topic. So in my market data
example, a new market data feed might come up and start publishing, I would
like all the receivers to start picking up the new messages without having
to reconfigure them to bind to an extra global exchange. This is a usage
that comes up very often. Any suggestions/comments is greatly appreciated.

Robert

On Tue, Jul 28, 2009 at 9:51 AM, Martin Sustrik <sustrik at fastmq.com> wrote:

> Ah, I though you specifically wanted to use the shared queue model.
> Brokerless model is the native model of 0MQ so it's even easier to
> accomplish. Each sender defines a global exchange. Each receiver binds to
> all the global exchanges.
>
> Martin
>
> Robert Zhang wrote:
>
>> The broker in the middle solution might not be a good solution in a high
>> throughput/low latency scenario. It's an extra hop and becomes the
>> bottleneck. An example would be multiple publishers sending various streams
>> of market data and many listeners are interested in aggregating all of them.
>> Having a single broker could be bad for scalability. Tibco and 29west all
>> support brokerless model of publishing/subscribing on a given topic with any
>> number of sender/receiver. Do you think this could be supported in the
>> future?
>>
>> Thank you,
>> Robert
>>
>> On Tue, Jul 28, 2009 at 8:19 AM, Martin Sustrik <sustrik at fastmq.com<mailto:
>> sustrik at fastmq.com>> wrote:
>>
>>    Hi Robert,
>>
>>
>>          I'm new to zmq and after working through the examples, I
>>        understand single sender can send to multiple receiver
>>        applications by using global exchange bound to multiple local
>>        queues. Also multiple senders can send to single receiver by
>>        using local exchanges bound to a global queue.
>>          How does one setup a multiple sender to multiple receiver
>>        scenario? I'm looking for N senders sending messages, M
>>        receivers that need to get all the published messages regardless
>>        of who the sender is. What would be bind model look like to
>>        accomplish this?
>>
>>
>>    Have a look at the chat tutorial. It does exactly what you are
>>    looking for. The point is to implement a simple application with a
>>    global queue to get messages from senders and a global exchange to
>>    send messages to receiver apps.
>>
>>    Martin
>>
>>
>>
>>
>>
>


-- 
Robert Zhang
Scout Trading
(917) 270-4308
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