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Date: Fri, 30 Mar 2012 22:05:26 +0000 (UTC)
From: "Jonathan Ellis (Commented) (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (CASSANDRA-3722) Send Hints to Dynamic Snitch
 when Compaction or repair is going on for a node.
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    [ https://issues.apache.org/jira/browse/CASSANDRA-3722?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13242800#comment-13242800 ] 

Jonathan Ellis commented on CASSANDRA-3722:
-------------------------------------------

Why doesn't dsnitch incorporate this automatically?  is it because the lack of a datapoint, isn't taken into account as slowness?
                
> Send Hints to Dynamic Snitch when Compaction or repair is going on for a node.
> ------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-3722
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3722
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>    Affects Versions: 1.1.0
>            Reporter: Vijay
>            Assignee: Vijay
>            Priority: Minor
>         Attachments: 0001-CASSANDRA-3722-A1-V2.patch, 0001-CASSANDRA-3722-A1.patch, 0001-CASSANDRA-3722-v3.patch, 0001-CASSANDRA-3723-A2-Patch.patch, 0001-Expose-SP-latencies-in-nodetool-proxyhistograms.txt, 3722-v4.txt
>
>
> Currently Dynamic snitch looks at the latency for figuring out which node will be better serving the requests, this works great but there is a part of the traffic sent to collect this data... There is also a window when Snitch doesn't know about some major event which are going to happen on the node (Node which is going to receive the data request).
> It would be great if we can send some sort hints to the Snitch so they can score based on known events causing higher latencies.

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