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https://issues.apache.org/jira/browse/HBASE-18083?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16077644#comment-16077644
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Yu Li commented on HBASE-18083:
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IIRC, HadoopQA will report "overall 1" if no new warnings introduced by patch,
no matter whether there exists warnings in current code base, but it seems the
rule has changed... [~ashish singhi] [~chia7712]
> Make large/small file clean thread number configurable in HFileCleaner
> ----------------------------------------------------------------------
>
> Key: HBASE-18083
> URL: https://issues.apache.org/jira/browse/HBASE-18083
> Project: HBase
> Issue Type: Bug
> Reporter: Yu Li
> Assignee: Yu Li
> Fix For: 3.0.0
>
> Attachments: HBASE-18083.patch, HBASE-18083.v2.patch,
> HBASE-18083.v3.patch
>
>
> Currently we have only one thread for both large and small file cleaning, but
> when write pressure is huge we might need more cleaner threads, so we need to
> make the thread number configurable.
> We observed more than 1.8PB data in archive directory online due to business
> access rate change, and this proposal is one of the necessary changes
> required.
> Default value of the configurations would still be left to 1 to keep low
> pressure to NN for normal case.
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