Overview of Oozie

Apache Oozie Workflow Scheduler for Hadoop is a workflow and coordination service for managing Apache Hadoop jobs:

• Oozie Workflow jobs are Directed Acyclic Graphs (DAGs) of actions; actions are Hadoop jobs (such as MapReduce, Streaming, Hive, Sqoop and so on) or non-Hadoop actions such as Java, shell, Git, and SSH.
• Oozie Coordinator jobs trigger recurrent Workflow jobs based on time (frequency) and data availability.
• Oozie Bundle jobs are sets of Coordinator jobs managed as a single job.

Oozie is an extensible, scalable and data-aware service that you can use to orchestrate dependencies among jobs running on Hadoop.