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Reid Chan commented on HBASE-18309: ----------------------------------- Thanks [~zyork], [~apurtell]. I can provide a patch backporting branch-1, rewriting in Java 7, but please allow me to fix HBASE-20095 first. > 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, 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. -- This message was sent by Atlassian JIRA (v7.6.3#76005)