AI engineering glossary · Data engineering
What is mapReduce?
MapReduce: A programming model for processing big data in two phases: a map step turns input into key-value pairs in parallel, and a reduce step combines all values sharing a key. The framework handles distribution and failures.
MapReduce: an example
Counting words: mappers emit (word, 1) for every word, and reducers sum the counts per word.
Related terms
More Data engineering terms
Where you learn it
MapReduce is part of the AI Engineering Program, which teaches it with notes, a hands-on lab and an exam. The first lesson is free.