Yang Yun created HDFS-15655:
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Summary: Add option to make balancer prefer to get cold blocks
Key: HDFS-15655
URL: https://issues.apache.org/jira/browse/HDFS-15655
Project: Hadoop HDFS
Issue Type: Improvement
Components: balancer & mover
Reporter: Yang Yun
Assignee: Yang Yun
We met two issues when using balancer.
# Moving hot files may cause failing of dfsclient reading.
# Some blocks of temporary files are moved and they are deleted soon.
Add a option dfs.namenode.hot.block.interval, the balancer prefer to get the
blocks which are belong to the cold files created before this time period.
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