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S3-Compatible Object Storage Backend Evaluation

1 post · Jan 2026 – Mar 2026

What this trail covers

Milvus continues to support a variety of S3-compatible object storage backends. This post evaluates RustFS as a potential alternative to MinIO, detailing its architecture, compatibility with Milvus's storage requirements, and providing a hands-on guide for replacing MinIO with RustFS in a Milvus deployment. It highlights the importance of a reliable and evolving object storage layer for Milvus's decoupled architecture and explores RustFS's potential for memory safety and performance. The deployment guide covers setting up RustFS and configuring Milvus to use it.

All Milvus trails
  1. Milvus + RustFS+ Vibe Coding: Build a Lightweight RAG Chatbot from ScratchThis post details the integration of Milvus with RustFS, an S3-compatible object storage system, for a lightweight RAG chatbot. It provides a practical guide to configuring Milvus to use RustFS instead of the default MinIO by modifying the `milvus.yaml` configuration and setting up a Docker Compose environment. The post also outlines the steps for chunking Markdown documentation, generating embeddings using OpenAI's text-embedding-3-large model, storing these embeddings in Milvus, and building a RAG pipeline that queries Milvus and uses GPT-5 for responses. The code for the prototype is made available.
  2. MinIO Stops Accepting Community Changes: Evaluating RustFS as a Viable S3-Compatible Object Storage Backend for MilvusThis post details the evaluation of RustFS as an S3-compatible object storage backend for Milvus, prompted by MinIO's shift to maintenance mode. It outlines Milvus's architecture and the role of object storage, then assesses RustFS's compatibility with Milvus's S3 API requirements. A hands-on guide is provided for replacing MinIO with RustFS in a Milvus 2.6.7 standalone deployment, including Docker Compose configuration and verification steps.