Tutorial-3 PySpark RDD Aggregation

In this article, we are going to discuss about GroupByKey, ReduceByKey and AggregateByKey. (a) GroupByKey:  On applying groupbyKey, dataset of (K, V) pairs convert into a dataset of (K, Iterable) pairs. Lots of unnecessary data transfer over the network. In the above image, each keys and values are being transferred in Read more…

Tutorial-3 Spark RDD Aggregations

In this article , we are going to discuss about GroupByKey, ReduceByKey and AggregateByKey. (a) GroupByKey:  On applying groupbyKey ,dataset of (K, V) pairs convert into a dataset of (K, Iterable) pairs. Lots of unnecessary data transfer over the network. In the above image, each keys and values are being transferred Read more…

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