--- title: "Litestream Writable VFS" url: https://daily.dev/posts/litestream-writable-vfs-iak6lqvkr source_url: https://fly.io/blog/litestream-writable-vfs/ type: article source: "Fly.io" published: 2026-01-29T15:43:00.926Z updated: 2026-01-29T15:43:22.589Z tags: ["database", "sqlite"] reading_time: 8 upvotes: 34 comments: 1 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Litestream Writable VFS **[Fly.io](https://daily.dev/sources/flydotio)** · 8 min read · 34 upvotes · 1 comments ## Summary Litestream VFS now supports write operations and background hydration for faster cold starts. The writable VFS mode buffers writes locally and syncs to object storage periodically, enabling single-writer scenarios with eventual durability. Background hydration pulls the full database from S3 while serving reads remotely, then switches to the local copy when ready. These features power Fly.io's Sprites storage stack, where every Sprite boots with 100GB of durable storage in under a second by using Litestream SQLite with S3-backed block maps. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Community discussion Top comments from developers on daily.dev. **@allinonetools** · 1 upvotes > This is clever. Getting near-instant startup with SQLite while syncing to S3 in the background solves a real pain for cold starts and edge apps without adding heavy infra. ## Similar posts on daily.dev - [Litestream VFS](https://daily.dev/posts/litestream-vfs-6w045q5zt) · Fly.io · 45 upvotes · 1 comments - [Litestream v0.5.0 is Here](https://daily.dev/posts/litestream-v0-5-0-is-here-a2ph0wjhj) · Fly.io · 17 upvotes · 0 comments --- Tags: [#database](https://daily.dev/tags/database), [#sqlite](https://daily.dev/tags/sqlite) [View this post on daily.dev](https://daily.dev/posts/litestream-writable-vfs-iak6lqvkr)