DeepSeek's 3FS distributed file system benchmarks are analyzed through a "performance reality check" method that compares reported metrics against theoretical hardware limits. The analysis highlights potential bottlenecks in network and storage components, particularly focusing on an AI training workload, where network bandwidth was identified as the primary limiting factor despite impressive throughput figures. This approach aims to validate performance claims and guide optimization strategies before extensive benchmarking.

3FS, developed by DeepSeek, is a distributed filesystem designed to abstract file storage across multiple machines, providing scalability, fault tolerance, and high throughput. The system comprises four main node types: Meta, Mgmtd, Storage, and Client, each with specific roles for managing metadata, configuration, and data storage. The CRAQ protocol ensures strong consistency and fault tolerance by organizing data in a chain, optimizing read and write operations.