Litestream Writable VFS
8 days ago
- #Litestream
- #Fly.io
- #SQLite
- Litestream is a Unix-y tool for synchronizing SQLite databases with S3-style object storage, preventing catastrophic data loss.
- Sprites, a new Fly.io product, rely heavily on Litestream for both their orchestrator and storage stack.
- The Sprites orchestrator uses Litestream to manage multiple SQLite databases, each synchronized with S3 storage.
- Litestream is integrated into the Sprite storage stack, enabling fast boot times and durable storage via S3 and NVMe caching.
- Litestream VFS allows point-in-time SQLite queries directly from object storage, improving cold start performance.
- A new writable VFS mode enables immediate writes with eventual durability, crucial for Sprite storage needs.
- Background hydration fetches the full database in the background while serving queries from object storage.
- These features are tailored for Sprites but may be useful for similar demanding use cases.