Deep Dive into 3FS: DeepSeek's Open-Source Distributed Filesystem

DeepSeek released 3FS (Fire-Flyer File System), a distributed filesystem. This post explains distributed filesystems and 3FS's architecture. 3FS comprises four node types: Meta (metadata management), Mgmtd (management server), Storage, and Client. It uses the CRAQ (Chain Replication with Apportioned Queries) protocol for strong consistency. The post analyzes 3FS's performance characteristics and outlines future performance testing and improvement directions.