Github user jkbradley commented on the pull request:
https://github.com/apache/spark/pull/2868#issuecomment-60863634
Another thought: This checkpointing logic seems like it will be useful for
a bunch of algorithms in the future. It would be nice to abstract it into some
class which has standard parameters (checkpointInterval, etc.) and a method
like:
```
def checkpointIfNeeded(dataTransform: RDD -> RDD)
```
which would handle persisting, checkpointing, unpersisting, and removing
checkpoint files. It can be a future PR though. It would be useful for the
GradientBoosting PR: [https://github.com/apache/spark/pull/2607]
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