Apache Oozie Workflow Scheduler for Hadoop is a workflow and coordination service for managing Apache Hadoop jobs:
- Oozie Workflow jobs are Directed Acyclical Graphs (DAGs) of actions ; actions are typically Hadoop jobs (MapReduce, Streaming, Pipes, Pig, Hive, Sqoop, etc).
- 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.
- To find out more about Oozie, see http://archive.cloudera.com/cdh5/cdh/5/oozie/.
- To install or upgrade Oozie, follow the directions on this page.
When starting, stopping and restarting CDH components, always use the service (8) command rather than running scripts in /etc/init.d directly. This is important because service sets the current working directory to / and removes most environment variables (passing only LANG and TERM), to create a predictable environment for the service. If you run the scripts in /etc/init.d, locally-set environment variables could produce unpredictable results. If you install CDH from RPMs, service will be installed as part of the Linux Standard Base (LSB).
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