What is DAG in Hive

Question

Hey,

I am learning hive, I came across a concept of DAG but I am unable to understand. Can any one explain this?

Answer 1

Hey,

DAG in Hive architecture is nothing but the direct acyclic graph. There is no cyclic dependency, so all your MapReduce tasks will be executed in dependent order. So, once the instruction or any task is executed we cannot go back and execute a previous task again. That's what DAG means, there is no cyclic dependency.