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Explain how you would design a partition strategy for a large dataset in HDFS.

Spark/Big Datahard3.4 min readPremium
Frequency
Low
Asked at 1 company
Category
452
questions in Spark/Big Data
Difficulty Split
88E|81M|283H
in this category
Total Bank
1,863
across 7 categories
Asked at these companies
Fragma Data Systems
Key Concepts Tested
joinoptimizationpartition
Expert AnswerPremium
677 wordsIncludes code examplesInterview-ready
**Section 1 — The Context (The 'Why')** HDFS partition strategy must align with query patterns—filtering by date and region should prune partitions without scanning unnecessary data. Over-partitioning (10K+ partitions per table) overwhelms the NameNode and causes small file problems; under-partitioning causes full scans....
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