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docs/LevelDB/09_internalkey___dbformat.md
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layout: default
title: "InternalKey & DBFormat"
parent: "LevelDB"
nav_order: 9
---
# Chapter 9: InternalKey & DBFormat - LevelDB's Internal Bookkeeping
Welcome to the final chapter of our deep dive into LevelDB's core components! In [Chapter 8: Compaction](08_compaction.md), we saw how LevelDB keeps its storage tidy by merging and rewriting [SSTables](01_table___sstable___tablecache.md) in the background. This compaction process relies heavily on being able to correctly compare different versions of the same key and discard old or deleted data.