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What is YARN?

Spark/Big Dataeasy0.4 min readPremium
Frequency
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Asked at 1 company
Category
452
questions in Spark/Big Data
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88E|81M|283H
in this category
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1,863
across 7 categories
Asked at these companies
Altimetrik
Key Concepts Tested
spark
Expert AnswerPremium
71 wordsInterview-ready
**YARN**: Hadoop's resource management layer. Replaced MapReduce 1's fixed slots. Allocates CPU and memory across cluster. Enables MapReduce, Spark, Hive, etc. on same infrastructure. **Key Idea**: Decouples resource management from processing. ResourceManager + NodeManagers + ApplicationMaster per job. **Why It Exists**: MapReduce 1 scaled poorly; one JobTracker....
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