Github user aarondav commented on a diff in the pull request: https://github.com/apache/spark/pull/1486#discussion_r17768962 --- Diff: core/src/main/scala/org/apache/spark/scheduler/TaskLocation.scala --- @@ -22,13 +22,35 @@ package org.apache.spark.scheduler * In the latter case, we will prefer to launch the task on that executorID, but our next level * of preference will be executors on the same host if this is not possible. */ --- End diff -- Would you mind beefing up the documentation here a bit? I am having trouble reading through and quickly finding out the difference between HostTaskLocation and ExecutorCacheTaskLocation. I guess the latter is exclusively used for the BlockManager cache, but it would be good to be explicit.
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