midHadoop
What is SequenceFile in Hadoop?
Updated May 16, 2026
Short answer
SequenceFile is a flat file format for storing binary key-value pairs.
Deep explanation
SequenceFile is optimized for Hadoop processing and reduces small file problems by combining many files into one. It supports compression and splittability for parallel processing.
Real-world example
Combining millions of small log files into a single processing unit.
Common mistakes
- Using SequenceFile for human-readable storage.
Follow-up questions
- Is SequenceFile splittable?
- What replaces SequenceFile in modern systems?