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Under the hood, off the hot path: How D1 scales to millions of databases

A deep dive into how D1 architected its control plane to scale and manage millions of databases, while keeping data plane query operations at the edge. We share guiding principles on how to build on the Developer Platform effectively.

Cloudflare1 min read

Prepared from a source announcement. Additional context and a checklist are separated from the description of the event.

What happened

A deep dive into how D1 architected its control plane to scale and manage millions of databases, while keeping data plane query operations at the edge. We share guiding principles on how to build on the Developer Platform effectively.

Source
Cloudflare
Source publication
13.10.2026
Category
Technology
Material type
Source announcement

What changes in practice

Distinguish an announcement from a feature you can actually use. An open specification, a library and a hosted service have different operational requirements. Before adopting one, review the project documentation, license and update process. An integration announcement does not guarantee compatibility across every tool version.

What to check

  • Check whether this is available, experimental or only announced.
  • Verify requirements and compatibility with the versions you use.
  • Run a small test in a separate project and record the result first.

Scope of this brief

This brief refers to the identified source material; it does not independently verify every reported circumstance. In community reports, distinguish the author’s claims from vendor findings. Timeline dates are not changed simply because the scanner runs again.

How MerMiko news is prepared

Sources and documentation

Source links are retained for checking dates, availability and original context.

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