[rabbitmq-discuss] (no subject)

Mon Jun 3 12:47:41 BST 2013

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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