Jason Brown created CASSANDRA-12347:
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Summary: Gossip 2.0 - broadcast tree for data dissemination
Key: CASSANDRA-12347
URL: https://issues.apache.org/jira/browse/CASSANDRA-12347
Project: Cassandra
Issue Type: Improvement
Reporter: Jason Brown
Description: A broadcast tree (spanning tree) allows an originating node to
efficiently send out updates to all of the peers in the cluster by constructing
a balanced, self-healing tree based upon the view it gets from the peer
sampling service (CASSANDRA-12346).
I propose we use an algorithm based on the [Thicket
paper|www.gsd.inesc-id.pt/%7Ejleitao/pdf/srds10-mario.pdf], which describes a
dynamic, self-healing broadcast tree. When a given node needs to send out a
message, it dynamically builds a tree for each node in the cluster; thus giving
us a unique tree for every node in the cluster (a tree rooted at every cluster
node). The trees, of course, would be reusable until the cluster configurations
changes or failures are detected (by the mechanism described in the paper).
Additionally, Thicket includes a mechanism for load-balancing the trees such
that nodes spread out the work amongst themselves.
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