Ted Ross created QPID-5466:
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Summary: Dispatch - Add different forwarding semantics for
addresses
Key: QPID-5466
URL: https://issues.apache.org/jira/browse/QPID-5466
Project: Qpid
Issue Type: Improvement
Components: Qpid Dispatch
Reporter: Ted Ross
Assignee: Ted Ross
(For version 0.2)
At present, if there are multiple receivers for a particular address, Dispatch
delivers a copy of each message to all of the receivers. This feature adds the
ability to by-configuration deliver messages to only one of those receivers.
The configuration for this feature is per-address and defines two settings:
- _fanout_ is either Multiple or Single (and a placeholder for Group).
Multiple fanout means all subscribers receive each message. Single fanout
means that only one subscriber receives the message.
- _bias_ controls how single-fanout is treated. The following values for bias
are provided:
- Closest - each message is delivered to the closest/least-cost subscriber.
- Spread - messages are spread indeterminately across all subscribers.
- Latency - (not implemented yet) Messages are delivered in a balanced way
to all subscribers based on the latency of acknowledgements. This mode
attempts to keep all subscribers equally fed with incoming messages.
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