[rabbitmq-discuss] Preserving Order Across Multiple Consumers on a Single Queue
charles.law at openx.com
Sun Jul 1 17:42:15 BST 2012
We are setting up RabbitMQ to accept CRUD messages and talk to consumers
that will directly interact with our databases (each account on our system
has a dedicated database & queue). For a particular queue/database we
would like to prevent collisions on items in the database. Unless we parse
our messages out, that would mean that RabbitMQ would need to preserve
message order on a queue.
Ideally we want multiple consumers, with each consumer subscribed to
multiple queues. And if possible, at any point in time, each queue would
only have 1 message being processed by our set of consumers. We'd only
send another message from a queue out to our consumers after getting an
acknowledgement back that the current one is done. We'll have multiple
queues, so across the different queues message order doesn't matter.
We did consider using an exclusive queues, but we want to balance our loads
so if 1 account/queue is very active, it is spread across all our consumers.
Can we set this up fairly easily with RabbitMQ? Or use a different setup
to accomplish the same goal?
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