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https://issues.apache.org/jira/browse/CASSANDRA-12015?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15336013#comment-15336013
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Paulo Motta edited comment on CASSANDRA-12015 at 6/17/16 1:11 PM:
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well, in this case I think the easiest way is to add a new
{{IEndpointSnitch.sortByRackDc}} method that has a default implementation that
doesn't do any sorting, and is only overridden by
{{AbstractNetworkTopologySnitch}}.
was (Author: pauloricardomg):
well, in this case I think the easiest way is to add a new
{{IEndpointSnitch.sortByRackDc}} method that has a default implementation that
doesn't do any sorting, and is only overridden by {{NetworkTopologyStrategy}}.
> 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
> 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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