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https://issues.apache.org/jira/browse/CHUKWA-650?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13424725#comment-13424725
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Jie Huang commented on CHUKWA-650:
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@Ari, I have verified the patch on a single-node deployment. The following
Demux log to demonstrate the final effect.
{noformat}
2012-07-30 14:38:22,395 INFO main DemuxManager - old reduce number: 5
2012-07-30 14:38:22,415 INFO main DemuxManager - new reduce number: 10
2012-07-30 14:38:22,424 INFO main ChukwaConfiguration - chukwaConf is
/home/Grace/work/chukwa-incubating-0.6.0/etc/chukwa
2012-07-30 14:38:22,453 WARN main JobClient - Use GenericOptionsParser for
parsing the arguments. Applications should implement Tool for the same.
2012-07-30 14:38:22,544 INFO main FileInputFormat - Total input paths to
process : 1
2012-07-30 14:38:22,678 INFO main JobClient - Running job: job_201207291428_0009
{noformat}
Any comment, please let me know. thanks for your time.
> 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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