What is the maximum number of possible topological sorts of N-order Direct Acyclic Graph?
的n阶有向无环图的拓扑排序的可能的最大数量是多少？
Oozie workflow is a collection of actions (i.e. Hadoop Map/Reduce jobs, Pig jobs) arranged in a control dependency DAG (Direct Acyclic Graph), specifying a sequence of actions execution.
Oozie工作流是放置在控制依赖DAG（有向无环图Direct Acyclic Graph）中的一组动作（例如，Hadoop的Map/Reduce作业、Pig作业等），其中指定了动作执行的顺序。
Oozie workflow is a collection of actions (i.e. Hadoop Map/Reduce jobs, Pig jobs) arranged in a control dependency DAG (Direct Acyclic Graph), specifying a sequence of actions execution.
Oozie工作流是放置在控制依赖DAG（有向无环图Direct Acyclic Graph）中的一组动作（例如，Hadoop的Map/Reduce作业、Pig作业等），其中指定了动作执行的顺序。
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