methods for aggregator stage
Posted: Tue May 27, 2008 4:29 am
Hello Gurus,
in aggregator stage, there are two method:
method "hash" require hashing partition with grouping keys
method "sort" also require hashing partition for input with grouping
keys.
what's the difference for these two methods ?
thanks very much!
in aggregator stage, there are two method:
method "hash" require hashing partition with grouping keys
method "sort" also require hashing partition for input with grouping
keys.
what's the difference for these two methods ?
thanks very much!