As far as I understand, Dataset.rdd is not the same as InternalRDD. It is just another RDD representation of the same Dataset and is created on demand (lazy val) when Dataset.rdd is called. This totally explains the observed behavior.
But how would would it be possible to know that a Dataset have been checkpointed? Should I manually keep track of that info? 2017-10-25 15:51 GMT+02:00 Bernard Jesop <bernard.je...@gmail.com>: > Hello everyone, > > I have a question about checkpointing on dataset. > > It seems in 2.1.0 that there is a Dataset.checkpoint(), however unlike RDD > there is no Dataset.isCheckpointed(). > > I wonder if Dataset.checkpoint is a syntactic sugar for > Dataset.rdd.checkpoint. > When I do : > > Dataset.checkpoint; Dataset.count > Dataset.rdd.isCheckpointed // result: false > > However, when I explicitly do: > Dataset.rdd.checkpoint; Dataset.rdd.count > Dataset.rdd.isCheckpointed // result: true > > Could someone explain this behavior to me, or provide some references? > > Best regards, > Bernard >
