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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DISPATCH-10) Add link-cost for route computation
Date Fri, 22 Apr 2016 21:56:13 GMT

    [ https://issues.apache.org/jira/browse/DISPATCH-10?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15254769#comment-15254769
] 

ASF subversion and git services commented on DISPATCH-10:
---------------------------------------------------------

Commit ff83fc265b45893ef1f13f4ab75a431c160aa00a 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=ff83fc2 ]

DISPATCH-10 - Add negotiation of connection-cost for inter-router connections.


> Add link-cost for route computation
> -----------------------------------
>
>                 Key: DISPATCH-10
>                 URL: https://issues.apache.org/jira/browse/DISPATCH-10
>             Project: Qpid Dispatch
>          Issue Type: New Feature
>    Affects Versions: 0.1
>            Reporter: Ted Ross
>            Assignee: Ted Ross
>             Fix For: 0.6
>
>
> The route computation algorithm has the ability to take link cost into consideration
when choosing best paths. Inter-router links need to be configured with an optional cost metric
that is fed into the routing algorithm.
> Inter-router connection cost is specified in two places in the configuration:  The inter-router
listener and the inter-router connector using a new attribute called "cost".  If the cost
attribute is absent, the cost defaults to 1, the lowest possible cost for an inter-router
jump.
> When a connection is established between routers, the Open.properties map will contain
an entry for a non-default cost.  Each side of the connection compares it's cost to the cost
provided by the peer and uses the higher value as the cost for the connection.  There is no
support currently for asymmetric cost (even though the internal routing engine can support
it).
> The cost can be configured to influence the routing algorithm to favor certain inter-router
connections over others, or to identify long-haul connections as having higher cost to keep
the message forwarding for "closest" in a region if there are any consumers in that region.



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