[rabbitmq-discuss] (no subject)

[Alvaro Videla]

The database consulted by the exchange lives in the same memory space as
RabbitMQ, it's an embedded database, so there is no network overhead.


On Mon, Jun 3, 2013 at 1:39 PM, Tamir Agamy <tamiragamy at gmail.com> wrote:

> Hello
>
> Earlier today I asked this question:
> When binding a queue, what really happens? is the binding information
> being forward via the
> server to the exchange, where it is entered to a binding list? or is the
> information saved at the
> server and the exchange has to inquire the server whenever it gets a
> message from the producer?
>
> and was answered (by Emile Joubert):
> "Exchanges don't really exist as independent entities in the broker. The
> bindings are stored in an internal database. This database is queried
> each time a message is received."
>
>
> So, f I understand correctly, then everytime the publisher sends a message
> to the exchange, the exchange has to inquire the database in order to see
> which queues (if any) are waiting to recieve the message.
> If that is the case, then we're not really saving network transportation,
> each message that the publisher produces will result in contacting the
> server, even if there are no subscribers to this publisher.
> Is that so?
>
> With regards,
> Tamir
>
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