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https://issues.apache.org/jira/browse/DISPATCH-57?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15285166#comment-15285166
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ASF subversion and git services commented on DISPATCH-57:
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Commit c71dd152664f3bf4240f1b6f83b01171afb793b4 in qpid-dispatch's branch
refs/heads/master from [[email protected]]
[ https://git-wip-us.apache.org/repos/asf?p=qpid-dispatch.git;h=c71dd15 ]
DISPATCH-57 - Use ineligible (full) links in balanced distribution only if
there are no eligible links. Don't return zero-fanout unless there are no
available destinations.
> Balance deliveries adaptively across all competing consumers in the network
> ---------------------------------------------------------------------------
>
> Key: DISPATCH-57
> URL: https://issues.apache.org/jira/browse/DISPATCH-57
> Project: Qpid Dispatch
> Issue Type: Improvement
> Components: Router Node
> Reporter: Ted Ross
> Assignee: Ted Ross
> Fix For: 0.6.0
>
>
> When there are multiple competing consumers on an address across a network,
> the network should balance deliveries to those consumers adaptively. This
> will cause more messages to be delivered to faster consumers and fewer
> messages to slower consumers.
> The basic idea is that each router tracks the deliveries and can know how
> many outstanding (unacked) deliveries have been sent via each outbound link.
> It can then choose a link based on the smallest number of outstanding
> deliveries. Faster links will tend to have fewer deliveries and will get
> preference in the balancing.
> This feature makes use of the route-cost to remove router nodes. The
> cost-to-remote-consumer is used as a threshold for forwarding deliveries to
> that node. For example, if the cost to a remote consumer is 100, then the
> local router that takes in deliveries to the address will only start
> forwarding messages to the remote node once local consumers have a backlog of
> at least 100 outstanding (unsettled) deliveries.
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