Shweta created HDFS-13910:
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Summary: Improve BlockPlacementPolicy for small clusters
Key: HDFS-13910
URL: https://issues.apache.org/jira/browse/HDFS-13910
Project: Hadoop HDFS
Issue Type: Bug
Components: hdfs
Reporter: Shweta
Assignee: Shweta
>From investigations and a few test occurrences, the NameNode
>BlockPlacementPolicy’s considerLoad can be bad for small test clusters.
A small (1-node) cluster may trigger a corner case of maxLoad = 0. In this
case, filtering should not take place.
When there is no heartbeat, maxLoad will be 0 and the existing logic will
filter out many nodes that have workload, which should be avoided.
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