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https://issues.apache.org/jira/browse/CASSANDRA-16203?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17402000#comment-17402000
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Paulo Motta commented on CASSANDRA-16203:
-----------------------------------------

Even if a CEP is not strictly required, it would be great to have CEPs for 
pluggable components being shipped in the default release, mostly for 
architectural documentation purposes. :-) #throwingideas

> Rack Aware Topology Strategy
> ----------------------------
>
>                 Key: CASSANDRA-16203
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-16203
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Cluster/Membership
>            Reporter: Cameron Zemek
>            Assignee: Cameron Zemek
>            Priority: Normal
>             Fix For: 4.x
>
>         Attachments: rackaware.patch
>
>
> If replication factor > racks then NetworkTopologyStrategy assigns the extras 
> in ring order. This means losing a rack can result in the loss of quorum. I 
> have implemented a similar topology strategy that evenly distributes replicas 
> across racks.



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