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https://issues.apache.org/jira/browse/HBASE-18309?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16420429#comment-16420429
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Reid Chan commented on HBASE-18309:
-----------------------------------
ping [~zyork]
would you mind taking a look at the QA results?
{{hadoopcheck}} are all about {{HFileSystem}} which is not a part of this
patch, i'm not sure...
> Support multi threads in CleanerChore
> -------------------------------------
>
> Key: HBASE-18309
> URL: https://issues.apache.org/jira/browse/HBASE-18309
> Project: HBase
> Issue Type: Improvement
> Reporter: binlijin
> Assignee: Reid Chan
> Priority: Major
> Fix For: 2.0.0-beta-1, 2.0.0
>
> Attachments: HBASE-18309.addendum.patch,
> HBASE-18309.branch-1.001.patch, HBASE-18309.branch-1.002.patch,
> HBASE-18309.branch-1.003.patch, HBASE-18309.branch-1.004.patch,
> HBASE-18309.branch-1.005.patch, HBASE-18309.master.001.patch,
> HBASE-18309.master.002.patch, HBASE-18309.master.004.patch,
> HBASE-18309.master.005.patch, HBASE-18309.master.006.patch,
> HBASE-18309.master.007.patch, HBASE-18309.master.008.patch,
> HBASE-18309.master.009.patch, HBASE-18309.master.010.patch,
> HBASE-18309.master.011.patch, HBASE-18309.master.012.patch,
> space_consumption_in_archive.png
>
>
> There is only one thread in LogCleaner to clean oldWALs and in our big
> cluster we find this is not enough. The number of files under oldWALs reach
> the max-directory-items limit of HDFS and cause region server crash, so we
> use multi threads for LogCleaner and the crash not happened any more.
> What's more, currently there's only one thread iterating the archive
> directory, and we could use multiple threads cleaning sub directories in
> parallel to speed it up.
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