January 2019
Beginner to intermediate
154 pages
4h 31m
English
Content preview from Apache Spark Quick Start Guide
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Transformation
As the name suggests, transformations help us in transforming existing RDDs. As an output, they always create a new RDD that gets computed lazily. In the previous examples, we have discussed many transformations, such as map(), filter(), and reduceByKey().
Transformations are of two types:
- Narrow transformations
- Wide transformations
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