Github user StephanEwen commented on the pull request: https://github.com/apache/flink/pull/1462#issuecomment-165489647 I think this is a nice addition. Unsure, though, if `checksum()` should be added to the `DataSet` directly. It is a tradeoff between convenience and API overload. A simpler alternative would be `Checksum chk = Utils.checksum(dataSet);`. Also, this is one way of computing a simple checksum (hash code). There may be other arithmetic methods, so it make sense to include some form of name of the checkpoint method in the method name. How about something like `Utils.checksumHashCode(dataSet)` or so?
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