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Posted to hdfs-dev@hadoop.apache.org by "Shuyan Zhang (Jira)" <ji...@apache.org> on 2023/03/24 10:23:00 UTC

[jira] [Created] (HDFS-16964) Improve processing of excess redundancy after failover

Shuyan Zhang created HDFS-16964:
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             Summary: Improve processing of excess redundancy after failover
                 Key: HDFS-16964
                 URL: https://issues.apache.org/jira/browse/HDFS-16964
             Project: Hadoop HDFS
          Issue Type: Improvement
            Reporter: Shuyan Zhang


After failover, the block with excess redundancy cannot be processed until all replicas are not stale, because the stale ones may have been deleted. That is to say, we need to wait for the FBRs of all datanodes on which the block resides before deleting the redundant replicas. This is unnecessary, we can bypass stale replicas when dealing with excess replicas, and delete non-stale excess replicas in a more timely manner.



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