ined
> && !aggregator.isDefined. If an aggregator is defined but we don't have
> an ordering, then I don't think it makes sense to sort the keys based on
> their hashcodes or some default ordering, since hashcode collisions would
> lead to incorrect results for sort-bas
One thing I have noticed with ExternalSorter is that if an ordering is not
defined, it does the sort using only the partition_id, instead of
(parition_id, hash). This means that on the reduce side you need to pull
the entire dataset into memory before you can begin iterating over the
results.
I f
