Lin Yiqun created HDFS-9303:
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Summary: Balancer slowly with too many small file blocks
Key: HDFS-9303
URL: https://issues.apache.org/jira/browse/HDFS-9303
Project: Hadoop HDFS
Issue Type: Improvement
Components: balancer & mover
Affects Versions: 2.7.1
Reporter: Lin Yiqun
Assignee: Lin Yiqun
In the recent hadoop release versions I found that balance operation is always
so slowly, even though I upgrade the version.When I analyse balancer log, I
found that in every balance iteration,it use only 4 to 5 minutes, and is a
short time.And The most important is that the most of being moving blocks is
small blocks ,and the size is smaller than 1M.And this is a main reason of the
low effective of balance operation.
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