[jira] [Commented] (CASSANDRA-3722) Send Hints to Dynamic Snitch when Compaction or repair is going on for a node.

["Vijay (Commented) (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-3722?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13210704#comment-13210704 ] 

Vijay commented on CASSANDRA-3722:
----------------------------------

Another issue just came up which is related to this ticket.
Where a node just completed bootstrap and hence it will not have the files cache warm enough for a faster response. Hence the scores for this node will be much lower score and hence there is a very less traffic going to that node. The problem is that unless there is more traffic sent the file caches will not warm up fast enough. Should we T (send additional requests which are not part of the normal operations) the requests until the other node recovers?
                
> 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
>
> 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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