Lin Yiqun created HDFS-9303: ------------------------------- 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)