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https://issues.apache.org/jira/browse/HBASE-8690?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13675578#comment-13675578
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Ted Yu commented on HBASE-8690:
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Nice improvement.
Mind attaching patch for trunk ?
> Reduce unnecessary getFileStatus hdfs calls in TTL hfile and hlog cleanners
> ---------------------------------------------------------------------------
>
> Key: HBASE-8690
> URL: https://issues.apache.org/jira/browse/HBASE-8690
> Project: HBase
> Issue Type: Improvement
> Components: master
> Reporter: Liu Shaohui
> Priority: Minor
> Attachments: HBASE-8690-0.94-v1.patch
>
>
> For each in file in archive dir, the TimeToLiveHFileCleaner need call
> getFileStatus to get the modify time of file. Actually the CleanerChore have
> had the file status when listing its parent dir.
> When we set the TTL to 7 days in our cluster for data security, the number of
> files left in archive dir is up to 65 thousands. In each clean period,
> TimeToLiveHFileCleaner will generate ten thousand getFileStatus call in a
> short time, which is very heavy for hdfs namenode.
> Fix: Change the path param to FileStatus in isFileDeletable method and reduce
> unnecessary getFileStatus hdfs calls in TTL cleaners.
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