Ted Yu created HBASE-18547:

             Summary: Provide better cleanup of WAL related entries in backup 
                 Key: HBASE-18547
                 URL: https://issues.apache.org/jira/browse/HBASE-18547
             Project: HBase
          Issue Type: Bug
            Reporter: Ted Yu

I was discussing the design around incremental backup with Vladimir.

Currently if WAL file is recorded in backup table, BackupLogCleaner would 
signal that the file can be cleaned up.
However, cleaner chore doesn't notify BackupLogCleaner whether the file is 
actually deleted.
This means that potentially large number of WAL files would stay in backup 

This issue is to investigate better cleanup strategy for the WAL entries.

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