[jira] [Assigned] (HBASE-18309) Support multi threads in CleanerChore

["Zach York (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-18309?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Zach York reassigned HBASE-18309:
---------------------------------

    Assignee: Zach York  (was: Reid Chan)

> 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: Zach York
>            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.branch-1.006.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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