HDFS-16223. AvailableSpaceRackFaultTolerantBlockPlacementPolicy should use chooseRandomWithStorageTypeTwoTrial() for better performance. (#3424). Contributed by Ayush Saxena.
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@ -80,9 +80,9 @@ public class AvailableSpaceRackFaultTolerantBlockPlacementPolicy
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Preconditions.checkArgument(clusterMap instanceof DFSNetworkTopology);
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Preconditions.checkArgument(clusterMap instanceof DFSNetworkTopology);
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DFSNetworkTopology dfsClusterMap = (DFSNetworkTopology) clusterMap;
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DFSNetworkTopology dfsClusterMap = (DFSNetworkTopology) clusterMap;
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DatanodeDescriptor a = (DatanodeDescriptor) dfsClusterMap
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DatanodeDescriptor a = (DatanodeDescriptor) dfsClusterMap
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.chooseRandomWithStorageType(scope, excludedNode, type);
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.chooseRandomWithStorageTypeTwoTrial(scope, excludedNode, type);
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DatanodeDescriptor b = (DatanodeDescriptor) dfsClusterMap
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DatanodeDescriptor b = (DatanodeDescriptor) dfsClusterMap
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.chooseRandomWithStorageType(scope, excludedNode, type);
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.chooseRandomWithStorageTypeTwoTrial(scope, excludedNode, type);
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return select(a, b);
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return select(a, b);
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}
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}
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