iners, mergeValue, etc) and return that instead of
> allocating a new object. So it should work with mutable objects — please
> post what problems you had with that. reduceByKey actually also allows this
> if your types are the same.
>
> Matei
>
>
> On Jun 11, 2014, at 3:21 PM,
Hello all,
I've seen some performance improvements using combineByKey as opposed to
reduceByKey or a groupByKey+map function. I have a couple questions. it'd
be great if any one can provide some light into this.
1) When should I use combineByKey vs reduceByKey?
2) Do the containers need to be im
