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apache oozie

Oozie provides a way for developers to define an entire workflow
--Comprised of multiple MapReduce jobs.
--Oozie Workflow jobs are Directed Acyclical Graphs (DAGs) of actions.
--Oozie Coordinator jobs are recurrent Oozie Workflow jobs triggered by time (frequency) and data availabilty.
Allows some jobs to run in parallel, others to wait for the output of a previous job
--Workflow definitions are written in XML
--Oozie is a scalable, reliable and extensible system
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