[jira] [Commented] (CASSANDRA-6157) Selectively Disable hinted handoff for a data center

["Aleksey Yeschenko (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-6157?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14374892#comment-14374892 ] 

Aleksey Yeschenko commented on CASSANDRA-6157:
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Why exactly do we have csv in our yaml when yaml has perfectly good built-in support for lists?

And there is zero reasons to collate the two config options (enabled/disabled + list of DCs) in one yaml param. This should've been a boolean global {{hinted_handoff_enabled}} param plus a separate yaml list for the HH DC blacklist - {{hinted_handoff_disabled_datacenters}}

[~kohlisankalp] or [~lyubent] - can you guys find time to open a new ticket and fix this at least in 3.0 or should I assign to someone else? Thanks.

> Selectively Disable hinted handoff for a data center
> ----------------------------------------------------
>
>                 Key: CASSANDRA-6157
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6157
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: sankalp kohli
>            Assignee: sankalp kohli
>            Priority: Minor
>             Fix For: 2.0.6
>
>         Attachments: super-csv-2.1.0.jar, trunk-6157-v2.diff, trunk-6157-v3.diff, trunk-6157-v4.diff, trunk-6157-v5.diff, trunk-6157.txt
>
>
> Cassandra supports disabling the hints or reducing the window for hints. 
> It would be helpful to have a switch which stops hints to a down data center but continue hints to other DCs.
> This is helpful during data center fail over as hints will put more unnecessary pressure on the DC taking double traffic. Also since now Cassandra is under reduced reduncany, we don't want to disable hints within the DC. 



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