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Date: Tue, 24 Jul 2012 00:30:34 +0000 (UTC)
From: "Ari Rabkin (JIRA)" <jira@apache.org>
To: chukwa-dev@incubator.apache.org
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Subject: [jira] [Commented] (CHUKWA-650) Re-configure Demux ReduceNumber
 without re-starting the DemuxManager service
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    [ https://issues.apache.org/jira/browse/CHUKWA-650?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13421056#comment-13421056 ] 

Ari Rabkin commented on CHUKWA-650:
-----------------------------------

Hrm. Does config get re-loaded without restarting demux?  If you tell me you have deployed this and it works, I'll commit it.
                
> Re-configure Demux ReduceNumber without re-starting the DemuxManager service
> ----------------------------------------------------------------------------
>
>                 Key: CHUKWA-650
>                 URL: https://issues.apache.org/jira/browse/CHUKWA-650
>             Project: Chukwa
>          Issue Type: Improvement
>          Components: Data Processors
>    Affects Versions: 0.6.0
>            Reporter: Jie Huang
>            Assignee: Jie Huang
>         Attachments: chukwa-650.patch
>
>
> Currently, DemuxManager controls the Demux's reduce number by reading "CHUKWA_DEMUX_REDUCER_COUNT_FIELD" at the initialization part. It is impossible to tune that reduce number before the next round of demux happens. The only way is to restart that DemuxManager service. I wonder if it is OK to parse that configuration item in  runDemux() function.

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