Hi, How is it possible to reduce by multidimensional keys?
For example, if every line is a tuple like: (i, j, k, value) or, alternatively: ((I, j, k), value) how can spark handle reducing over j, or k?
Hi, How is it possible to reduce by multidimensional keys?
For example, if every line is a tuple like: (i, j, k, value) or, alternatively: ((I, j, k), value) how can spark handle reducing over j, or k?