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HDFS-15295. AvailableSpaceBlockPlacementPolicy should use chooseRandomWithStorageTypeTwoTrial() for better performance. Contributed by Jinglun.

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(cherry picked from commit 453771f170)
This commit is contained in:
Wei-Chiu Chuang 2020-04-24 11:53:24 -07:00
parent 7a3f190d89
commit d6c48f8100
1 changed files with 2 additions and 2 deletions
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4
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/AvailableSpaceBlockPlacementPolicy.java
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@ -87,9 +87,9 @@ protected DatanodeDescriptor chooseDataNode(final String scope,
Preconditions.checkArgument(clusterMap instanceof DFSNetworkTopology);
DFSNetworkTopology dfsClusterMap = (DFSNetworkTopology)clusterMap;
DatanodeDescriptor a = (DatanodeDescriptor) dfsClusterMap
.chooseRandomWithStorageType(scope, excludedNode, type);
.chooseRandomWithStorageTypeTwoTrial(scope, excludedNode, type);
DatanodeDescriptor b = (DatanodeDescriptor) dfsClusterMap
.chooseRandomWithStorageType(scope, excludedNode, type);
.chooseRandomWithStorageTypeTwoTrial(scope, excludedNode, type);
return select(a, b, false);
}