ReduceByKey vs CombineByKey
Whats the difference between reduceByKey and CombineByKey in Spark
GroupBy vs ReduceByKey
Whats the difference between groupByKey vs ReduceByKey in Spark
group by key
Group by key and in the Map Partition apply some custom logic on the aggregated values of the key in Spark
Spark mapPartitions
Understanding Map Partition in Spark