If the concept of MapReduce is pretty clear in my mind, i can't say so much for Tez.
MapReduce performs its work through Map > Partition, Sort, Shuffle > Reduce, and I know well each of these phases...
But for Tez, and more precisely, between two Vertices (considering a Vertices Map and a Vertices Reduce), how is it ?
Is there a built-in "partition, sort, shuffle" like in MR ? Or is it to us to manage this internal logic (i read a word count example, it seems it is, but I prefer to be sure) ?