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https://issues.apache.org/jira/browse/CASSANDRA-13580?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16042773#comment-16042773
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Marcus Eriksson commented on CASSANDRA-13580:
---------------------------------------------

bq. Nodes in a read only DC will still receive and persist data from the rest 
of the clusters and get counted against the CL, right?
good point, this wont work the way it is implemented now, and I doubt the use 
case is common enough to warrant a more complicated solution.

> Readonly datacenter support
> ---------------------------
>
>                 Key: CASSANDRA-13580
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-13580
>             Project: Cassandra
>          Issue Type: New Feature
>            Reporter: Marcus Eriksson
>            Assignee: Marcus Eriksson
>             Fix For: 4.x
>
>
> Some setups include datacenters where only reads are performed (example could 
> be datacenter dedicated for taking backups).
> We could use this information during repair to make sure that we never stream 
> out of a read only dc.



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