[HBASE-9019] Port HBASE-8690: Reduce unnecessary getFileStatus hdfs calls in TTL hfile and hlog cleanners to 0.94

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.94.11
• Hadoop Flags: Reviewed
• Assignee: Ted Yu
• Reporter: Ted Yu
• Created: 22/Jul/13 21:54
• Updated: 21/Aug/13 00:08
• Resolved: 07/Aug/13 04:36

Description

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 is to change the path param to FileStatus in isFileDeletable method and reduce unnecessary getFileStatus hdfs calls in TTL cleaners.

This issue is to backport this improvement to 0.94

Issue Links

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