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  1. Categories >> Software >> Big Data >> Hadoop >> Apache Spark
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Explain Spark coalesce() operation?

Question Posted / Aruna

Answer Posted / Aruna

The `coalesce()` function in Apache Spark is used to reduce the number of partitions in an RDD while preserving the data. It merges partitions together and can help improve performance by reducing the amount of shuffling required during subsequent operations.

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