Chenyu Zheng created HDFS-17565:
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             Summary: EC: dfs.datanode.ec.reconstruction.threads should be 
configurable.
                 Key: HDFS-17565
                 URL: https://issues.apache.org/jira/browse/HDFS-17565
             Project: Hadoop HDFS
          Issue Type: Improvement
            Reporter: Chenyu Zheng
            Assignee: Chenyu Zheng


dfs.datanode.ec.reconstruction.threads should be configured, then we can adjust 
the speed of ec block copy. Especially HDFS-17550 wanna decommissioning 
DataNode by EC block reconstruction.



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