Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/14335#discussion_r71990232
--- Diff:
mllib/src/main/scala/org/apache/spark/mllib/clustering/LDAOptimizer.scala ---
@@ -472,12 +473,13 @@ final class OnlineLDAOptimizer extends LDAOptimizer {
gammaPart = gammad :: gammaPart
}
Iterator((stat, gammaPart))
- }
+ }.persist(StorageLevel.MEMORY_AND_DISK)
--- End diff --
It's a little risky to assume this can be persisted, but I think it's good
idea unless it can be optimized into one pass
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