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From "Zach York (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-18309) Support multi threads in CleanerChore
Date Tue, 27 Feb 2018 18:12:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-18309?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16379064#comment-16379064

Zach York commented on HBASE-18309:

[~reidchan] Just stumbled upon this. Awesome work! Do you have an estimate for how difficult
it would be to get this backported to branch-1? It would be awesome to have some of this work
there too.

> 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: 3.0.0, 2.0.0-beta-1
>         Attachments: HBASE-18309.addendum.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,
> 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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