Workflows expressed in Oozie can contain:

Question

Options

• ASequences of MapReduce and Pig.
• BSequences of MapReduce job only; on Pig on Hive tasks or jobs.
• CSequences of MapReduce and Pig jobs. These are limited to linear sequences of actions with exception
• DIterntive repetition of MapReduce jobs until a desired answer or state is reached.

• A
  81% (30)
• B
  5% (2)
• C
  3% (1)
• D
  11% (4)

Explanation

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. This graph is specified in hPDL (a XML Process Definition Language). hPDL is a fairly compact language, using a limited amount of flow control and action nodes. Control nodes define the flow of execution and include beginning and end of a workflow (start, end and fail nodes) and mechanisms to control the workflow execution path ( decision, fork and join nodes). Workflow definitions Currently running workflow instances, including instance states and variables

No community discussion yet for this question.