chan created HDFS-15876:
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Summary: Erasure Coding: Balance the tasks num on nodes when
reconstruct ec recovery
Key: HDFS-15876
URL: https://issues.apache.org/jira/browse/HDFS-15876
Project: Hadoop HDFS
Issue Type: Improvement
Components: ec, erasure-coding
Affects Versions: 3.0.0
Reporter: chan
ErasureCodingWork:addTaskToDatanode
at the end,this will assign the task to target[0] node,but the node may remain
many tasks
should we consider the num of task on nodes and balance them not just assign
the tasks to target[0] node
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