Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/962#discussion_r14212551
--- Diff: core/src/main/scala/org/apache/spark/executor/TaskMetrics.scala
---
@@ -67,6 +67,12 @@ class TaskMetrics extends Serializable {
var diskBytesSpilled: Long = _
/**
+ * If this task reads from a HadoopRDD, from cached data, or from a
parallelized collection,
--- End diff --
Doesn't `sc.textFile(hdfs://...).map(...).persist(DISK_ONLY).count()` do it?
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