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[SPARK-22832][ML] BisectingKMeans unpersist unused datasets #20017

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[SPARK-22832][ML] BisectingKMeans unpersist unused datasets #20017

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zhengruifeng Dec 19, 2017
e05cc26
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zhengruifeng Dec 19, 2017
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zhengruifeng Dec 20, 2017
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6 changes: 4 additions & 2 deletions mllib/src/main/scala/org/apache/spark/mllib/clustering/BisectingKMeans.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -197,7 +197,7 @@ class BisectingKMeans private (
newClusters = summarize(d, newAssignments)
newClusterCenters = newClusters.mapValues(_.center).map(identity)
}
if (preIndices != null) preIndices.unpersist()
if (preIndices != null) preIndices.unpersist(blocking = false)
preIndices = indices
indices = updateAssignments(assignments, divisibleIndices, newClusterCenters).keys
.persist(StorageLevel.MEMORY_AND_DISK)
Expand All @@ -212,7 +212,9 @@ class BisectingKMeans private (
}
level += 1
}
if(indices != null) indices.unpersist()
if (preIndices != null) preIndices.unpersist(blocking = false)
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@srowen srowen Dec 19, 2017

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Do we usually write "blocking ="? there's only one argument.
I'd use braces and put the body on the next line too.

if (indices != null) indices.unpersist(blocking = false)
norms.unpersist(blocking = false)
val clusters = activeClusters ++ inactiveClusters
val root = buildTree(clusters)
new BisectingKMeansModel(root)
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