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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CASSANDRA-2106) Warn or fail when read repair is disabled with the dynamic snitch
Date Thu, 03 Feb 2011 22:14:28 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-2106?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12990337#comment-12990337
] 

Jonathan Ellis commented on CASSANDRA-2106:
-------------------------------------------

Logging a warning if NO CF has RRC > 0 is reasonable -- remember that while RRC is per-CF
the snitch information is global. As long as you're doing reads for data in any CF from some
node you will have latency info for it.

> 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
>            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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