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===Work Flow Chart===
[[File:Cluster-overview.png]]
===The implementation of Spark requires the following Components===
====1.Driver Program (SparkContext)====
SparkContext is the main entry point for all Spark functions.
====2.Cluster Manager====
The cluster manager is used for resource management of applications.
====3. Worker node====
Work nodes are used to submit tasks to executors, report executor status information, cpu and memory information to the cluster manager.
====4. Executor====
