Joshua McKenzie updated CASSANDRA-12015:
    Component/s: Streaming and Messaging

> Rebuilding from another DC should use different sources
> -------------------------------------------------------
>                 Key: CASSANDRA-12015
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-12015
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Streaming and Messaging
>            Reporter: Fabien Rousseau
> Currently, when adding a new DC (ex: DC2) and rebuilding it from an existing 
> DC (ex: DC1), only the closest replica is used as a "source of data".
> It works but is not optimal, because in case of an RF=3 and 3 nodes cluster, 
> only one node in DC1 is streaming the data to DC2. 
> To build the new DC in a reasonable time, it would be better, in that case, 
> to stream from multiple sources, thus distributing more evenly the load.

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