[rabbitmq-discuss] A new exchange type

Alister Morton Alister.Morton at tradition.com
Wed Jan 28 11:46:11 GMT 2009

> That's the standard last-value-cache scenario. Almost
> everyone would benefit from that kind of functionality IMO.
Yup, that's what I thought.

> However, it's pretty dangerous to use without the proper
> caution.

> The number of topics is basically unbound (actually
> 256^256) meaning that you can exhaust memory and cause DoS by
> swapping to disk when application doesn't restrict itself to
> a finite set of distinct topics.
Yes, you do have to put controls in place to stop the server from becoming exhausted.

> Also, getting the last value
> can be pretty CPU greedy if there's a lot of topics - that
> can also lead to DoS situations.


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