repartition vs coalesce in Spark: Which to Use and When
Both change the number of partitions — but one does a full shuffle and one doesn't, and that single difference decides your performance. Plus the coalesce(1) trap everyone falls into.
Read MoreBoth change the number of partitions — but one does a full shuffle and one doesn't, and that single difference decides your performance. Plus the coalesce(1) trap everyone falls into.
Read More