S4 is a high-performance, S3-compatible object storage server written in Rust.
The software uses append-only volume files instead of storing every object as an individual file. This design reduces inode consumption while supporting atomic metadata operations, content-addressable deduplication and crash-safe storage.
This is free and open source software.
Key Features
- Provides an S3-compatible API for use with AWS CLI, boto3 and other S3 clients.
- Stores objects in append-only volumes to avoid inode exhaustion.
- Automatically deduplicates content to reduce storage requirements.
- Supports object versioning and delete markers.
- Applies lifecycle policies for object expiration and old-version cleanup.
- Offers atomic directory operations regardless of the number of contained objects.
- Ensures data is written before reporting a successful operation.
- Provides role-based access control with Reader, Writer and SuperUser roles.
- Queries CSV, JSON and Parquet objects with S3 Select SQL.
- Supports SQL queries across multiple objects using glob patterns.
- Offers single-node operation and leaderless quorum replication.
- Exposes Prometheus metrics for monitoring.
Website: github.com/s4core/s4core
Support:
Developer: S4Core
License: Apache License 2.0
S4 is written in Rust. Learn Rust with our recommended free books and free tutorials.
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Read our verdict in the software roundup.
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