Broadcast Join in Spark
What is a Broadcast Join in Spark? A Broadcast Join in Spark is an optimized join strategy where one of the datasets is broadcasted (shared) to all the nodes...
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reduceByKey() vs groupByKey() in Spark
What are reduceByKey() and groupByKey() in Spark? reduceByKey() Definition: Combines values of the same key using a specified reduce function (like sum, m...
Transformations and Actions in Spark
In Apache Spark, two key operations work together to process data: Transformations and Actions. Understanding these concepts helps us efficiently work with l...
Narrow and Wide Transformations in Spark
In Apache Spark, Transformations are divided into two types: Narrow and Wide Transformations. Understanding these helps optimize Spark jobs for performance a...
Jobs, Stages and Tasks in Spark
What is a Job? A Job is a complete Spark operation triggered by an action like collect(), count(), or save().