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A lengthy discussion on replay in January 2007 (page #7, cannot get a direct link to the thread) highlighted a number of requirements and possible implementation options for adding replay to QPID and AMQP. The requirements come from the desire to speed up the rate a consumer can read messages and to simplify its recovery when it starts. This page is to give some background, a proposal and finally some implementation options for discussion.

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When a an application updates the state of a single Resource Manager, e.g a database or queue manager, it normally does so within the context of a local Transaction and this transaction exhibits the following ACID properties:

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