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https://issues.apache.org/jira/browse/CASSANDRA-12346?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15400097#comment-15400097
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Jason Brown commented on CASSANDRA-12346:
-----------------------------------------

Here is the branch for an implementation of hyparview:

||hyparview||
|[branch|https://github.com/jasobrown/cassandra/tree/broadcast_hyparview]|
|[dtest|http://cassci.datastax.com/view/Dev/view/jasobrown/job/jasobrown-broadcast_hyparview-dtest/]|
|[testall|http://cassci.datastax.com/view/Dev/view/jasobrown/job/jasobrown-broadcast_hyparview-testall/]|

I've documented it rather extensively, so I hope that aides the reviewer. There 
are still a couple of (very) minor things left to clean up, including the 
simulator (implemented as a long test), but that should not hinder any review, 
i think.


> Gossip 2.0 - introduce a Peer Sampling Service for partial cluster views
> ------------------------------------------------------------------------
>
>                 Key: CASSANDRA-12346
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-12346
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Jason Brown
>            Assignee: Jason Brown
>              Labels: gossip
>
> A [Peer Sampling 
> Service|infoscience.epfl.ch/record/83409/files/neg--1184036295all.pdf] is a 
> module that provides a partial view of a cluster to dependent modules. A 
> node's partial view, combined with all other nodes' partial views, combine to 
> create a fully-connected mesh over the cluster. This way, a given node does 
> not need to have direct connections to every other node in the cluster, and 
> can be much more efficient in terms of resource management as well as 
> information dissemination. Peer Sampling Services by their nature must be 
> self-healing and self-balancing to maintain the fully-connected mesh.
> I propose we use an algorithm based on [HyParView 
> (http://asc.di.fct.unl.pt/~jleitao/pdf/dsn07-leitao.pdf], which is a concrete 
> algorithm for a Peer Sampling Service. HyParView has a clearly defined 
> protocol, and is reasonably simple to implement.



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