HARDBackend Engineer
Design a Git Version Control System
Build a distributed version control system with content-addressable storage, branching, merging, and conflict resolution
Estimated Time: 180 minutes
Solution Overview
Git stores objects (blobs, trees, commits) identified by SHA-1 hash of content. Branches are lightweight refs to commits. DAG structure enables efficient merging with three-way merge algorithm. Distributed architecture allows offline work.
Architecture Pattern
Content-addressable storage with SHA-1 hashing for all objects
Key Concepts
Content AddressingDAG StructureBranches and RefsThree-way MergeStaging Area
Used By Companies
GitHubGitLabBitbucket
Solution Overview
Git stores objects (blobs, trees, commits) identified by SHA-1 hash of content. Branches are lightweight refs to commits. DAG structure enables efficient merging with three-way merge algorithm. Distributed architecture allows offline work.
Companies
- •GitHub
- •GitLab
- •Bitbucket
Key Concepts
- •Content Addressing
- •DAG Structure
- •Branches and Refs
- •Three-way Merge
- •Staging Area
Implementation Url
https://github.com/codecrafters-io/build-your-own-x#build-your-own-git