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https://issues.apache.org/jira/browse/CASSANDRA-2106?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jonathan Ellis resolved CASSANDRA-2106.
---------------------------------------

    Resolution: Fixed
      Assignee: Jonathan Ellis

I can't think of a good way to pick a threshold that won't generate false 
positives for at least some use cases. Added warning to the cli documentation 
instead in r1092440.

> Warn or fail when read repair is disabled with the dynamic snitch
> -----------------------------------------------------------------
>
>                 Key: CASSANDRA-2106
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2106
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Stu Hood
>            Assignee: Jonathan Ellis
>            Priority: Minor
>              Labels: des
>             Fix For: 0.8
>
>
> When read repair is completely disabled, the dynamic snitch will never adjust.
> Options:
> # Explicitly disallow running with RR==0 + des
> # Implicitly enable RR at some low fraction when des is in use
> # Log warnings

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