[openstack-dev] blueprint amqp-rpc-fast-reply-queue

Eric Windisch eric at cloudscaling.com
Tue Jan 29 21:39:38 UTC 2013

> I think we are finally on the same page on this. The confusion I suppose has been about listening on two reply queues at once. It isn't necessary in compatibility mode (replies will only come back on the old queue) and certainly not wanted for performance reasons in fast mode (replies will only come back on the new queue).

My point was that by listening on two queues and not changing msg_id, you can send messages in fast-mode and receive in both modes. Then, Grizzly will be able to send and reply and get replies from Havana, regardless of if Grizzly is set to compatibility mode or not. Grizzly would also, by default, be able to send and reply to Folsom, as well as receive replies from Folsom as long as compatiblity mode is not disabled.

Eric Windisch

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