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Date: Wed, 6 Apr 2016 17:00:30 +0000 (UTC)
From: "Jeremy Hanna (JIRA)" <jira@apache.org>
To: commits@cassandra.apache.org
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Subject: [jira] [Commented] (CASSANDRA-11488) Bug or not?: coordinator using
 SimpleSnitch may query other nodes for copies of local data
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    [ https://issues.apache.org/jira/browse/CASSANDRA-11488?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15228643#comment-15228643 ] 

Jeremy Hanna commented on CASSANDRA-11488:
------------------------------------------

Giving this some more though, I think we need to document the distinction.  I didn't realize that the dynamic snitch would route away from local nodes when using TokenAware load balancing for example.  It does make sense if that local node is really behind on LCS or has some heavier operation going on.  I just don't think people expect TokenAware would get routed to another replica necessarily.

In any case I agree that documentation is probably the best outcome for now unless there is data that shows that this is insufficient.

> Bug or not?: coordinator using SimpleSnitch may query other nodes for copies of local data 
> -------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-11488
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-11488
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Coordination
>            Reporter: Jim Witschey
>            Assignee: Stefania
>            Priority: Minor
>              Labels: doc-impacting
>
> As [~Stefania] explains [in this JIRA comment|https://issues.apache.org/jira/browse/CASSANDRA-11225?focusedCommentId=15221059&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15221059], {{SimpleSnitch}} does not implement {{IEndpointSnitch.sortByProximity(localhost, liveendpoints)}}, so a query for data on the coordinator may query other nodes. That seems like unnecessary work to me, and on that note, Stefania woonders [in this JIRA comment|https://issues.apache.org/jira/browse/CASSANDRA-11225?focusedCommentId=15223598&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15223598] - should this be considered a bug?
> Stefania, I'm assigning you here -- could you find the right people to involve in this discussion?


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