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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DISPATCH-57) Balance deliveries adaptively across all competing consumers in the network
Date Wed, 04 May 2016 02:09:12 GMT

    [ https://issues.apache.org/jira/browse/DISPATCH-57?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15270015#comment-15270015
] 

ASF subversion and git services commented on DISPATCH-57:
---------------------------------------------------------

Commit 8fa9635252abac997266f2388ba5a5844f34e88b in qpid-dispatch's branch refs/heads/master
from [~tross@redhat.com]
[ https://git-wip-us.apache.org/repos/asf?p=qpid-dispatch.git;h=8fa9635 ]

DISPATCH-57 - Fixed balanced forwarding so it a) wont involve "full" links, and b) will honor
the valid-origin for messages when choosing a path to the destination, and c) uses the router
cost as a threshold for using inter-router links.


> 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
>
>
> 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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