Diagram

Spark Application Anatomy

Raymond Raymond
visibility 148 access_time 2 years ago language English

This diagram depicts the relationships among Spark application, job, stage and task. 

One Spark application can contain multiple actions and each action will  be related to one Spark job; to run the computation within a job, multiple stages might be involved as some actions cannot be done within just one stage; each stage will include many tasks and the task count is decided by the total partitions in the RDD/DataFrame. Task is a lowest parallelism unit in Spark. 

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