CallFS: A Distributed, High-Performance REST API Filesystem

CallFS is an ultra-lightweight, high-performance REST API filesystem offering precise Linux filesystem semantics across various backends, including local storage, Amazon S3, and a distributed peer-to-peer network. Designed for speed, reliability, and horizontal scalability, it features a modular architecture with components like an API server, core engine, pluggable storage backends, PostgreSQL metadata store, Redis-based distributed lock manager, and a link manager. CallFS provides rich file and directory operations, secure single-use download links, comprehensive security, and robust observability.