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100GiB DB Served from a Durable Object

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This describes an engineering demo showing Zero’s next-generation IVM engine squeezed into a single Durable Object (DO) and used to query a 100GiB database stored in Cloudflare R2 while keeping live queries active. The experiment, posted by Matt (@tantaman) on Oct 16, 2026, reports serving a 100.6 GB dataset from one DO with a live demo at demo.r2db.dev. The stated goal was to find the smallest, most constrained runtime able to run the IVM, and the result is a one-DO deployment that reads from R2 and maintains live query state.

The practical takeaway is that a full incremental-view-maintenance engine can be extremely compact and still handle large edge-hosted datasets with live updates, demonstrating a path to low-footprint, real-time database services at the edge. Packing the engine into a single durable runtime reduces architectural complexity and suggests cost and latency benefits for real-time apps that rely on edge storage and continuous queries. The post generated visible community interest, signaling enthusiasm for tiny, powerful edge runtimes serving substantial persistent data.

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