The results of the MapReduce job are associated with a memory-key to ultimately
be stored in Memory.
If a Comparator is provided, then all pairs leaving the MapEmitter are sorted.
The sorted results ar
If a Comparator is provided, then all pairs leaving the ReduceEmitter are
sorted. If sorting is not
The final result can be generated and added to Memory and accessible via
A MapReduce job can be map-only, map-reduce-only, or map-combine-reduce. Before
executing the partic
The map() method is logically executed at all vertices in the graph in parallel.
The map() method em
The reduce() method is logically on the "machine" the respective key hashes to.
The reduce() method
This method is called at the end of the respective MapReduce.Stage for a
particular "chunk of vertic
This method is called at the start of the respective MapReduce.Stage for a
particular "chunk of vert
When multiple workers on a single machine need MapReduce instances, it is
possible to use clone. Thi
A helper method to construct a MapReduce given the content of the supplied
configuration. The class
The combine() method is logically executed at all "machines" in parallel. The
combine() method pre-c