Tsz Wo Nicholas Sze created HDFS-8824:
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Summary: Do not use small blocks for balancing the cluster
Key: HDFS-8824
URL: https://issues.apache.org/jira/browse/HDFS-8824
Project: Hadoop HDFS
Issue Type: Improvement
Components: balancer & mover
Reporter: Tsz Wo Nicholas Sze
Assignee: Tsz Wo Nicholas Sze
Balancer gets datanode block lists from NN and then move the blocks in order to
balance the cluster. It should not use the blocks with small size since moving
the small blocks generates a lot of overhead and the small blocks do not help
balancing the cluster much.
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