Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/962#discussion_r14212743
--- 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 --
Oh hm, looks like in the `DISK_ONLY` case for block manager we don't set
the input bytes (I'm referring to
[CacheManager.scala#L130](https://github.com/kayousterhout/spark-1/blob/read_metrics/core/src/main/scala/org/apache/spark/CacheManager.scala#L130)),
which I guess is correct because we're just reading back the bytes we just put
in.
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