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From mateiz <>
Subject [GitHub] spark pull request: Patch for SPARK-942
Date Mon, 03 Mar 2014 05:39:57 GMT
Github user mateiz commented on a diff in the pull request:
    --- Diff: core/src/main/scala/org/apache/spark/CacheManager.scala ---
    @@ -71,10 +71,21 @@ private[spark] class CacheManager(blockManager: BlockManager) extends
Logging {
               val computedValues = rdd.computeOrReadCheckpoint(split, context)
               // Persist the result, so long as the task is not running locally
               if (context.runningLocally) { return computedValues }
    -          val elements = new ArrayBuffer[Any]
    -          elements ++= computedValues
    -          blockManager.put(key, elements, storageLevel, tellMaster = true)
    -          elements.iterator.asInstanceOf[Iterator[T]]
    +          if (storageLevel.useDisk && !storageLevel.useMemory) {
    --- End diff --
    This is not the only condition where we want to do this. For example we might also want
it for MEMORY_ONLY_SER, where the serialized data might fit in RAM but the ArrayBuffer of
raw objects might not. (Especially if you set spark.rdd.compress to compress the serialized

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