Github user mridulm commented on the pull request: https://github.com/apache/spark/pull/1486#issuecomment-56480392 Are we proposing to introduce hdfs caching tags/idioms directly into TaskSetManager in this pr ? That does not look right. We need to generalize this so that any rdd can specify process/host (maybe rack also ?) annotations. Once done, HadoopRdd can leverage that. Depending on underscore not being in name, etc is fragile. One option would be to define our uri's: with default reverting to host only.
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