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HDFS-2012. Balancer incorrectly treats nodes whose utilization equals avgUtilization. Contributed by Uma Maheswara Rao G.

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git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1183457 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Konstantin Shvachko 2011-10-14 18:31:55 +00:00
parent 068556b9e0
commit 4cb7a4854d
2 changed files with 5 additions and 2 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -1733,6 +1733,9 @@ Release 0.22.0 - Unreleased
HDFS-2290. Block with corrupt replica is not getting replicated.
(Benoy Antony via shv)
HDFS-2012. Balancer incorrectly treats nodes whose utilization equals
avgUtilization. (Uma Maheswara Rao G via shv)
Release 0.21.1 - Unreleased
HDFS-1466. TestFcHdfsSymlink relies on /tmp/test not existing. (eli)

4
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Balancer.java
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@ -1261,12 +1261,12 @@ private boolean isOverUtilized(BalancerDatanode datanode) {
return datanode.utilization > (policy.getAvgUtilization()+threshold);
}
/* Return true if the given datanode is above average utilized
/* Return true if the given datanode is above or equal to average utilized
* but not overUtilized */
private boolean isAboveAvgUtilized(BalancerDatanode datanode) {
final double avg = policy.getAvgUtilization();
return (datanode.utilization <= (avg+threshold))
&& (datanode.utilization > avg);
&& (datanode.utilization >= avg);
}
/* Return true if the given datanode is underUtilized */