Successful production database failover test with zero customer impact
Vercel completed a full production failover of its core control-plane database from Azure West US to East US 2 on July 24, 2025, verifying disaster recovery readiness with zero downtime and no performance degradation. The test covered all control-plane traffic including API requests, background jobs, and deployments across 19 regions.
Many engineering teams have disaster recovery plans. But unless those plans are regularly exercised on production workloads, they don’t mean much. Real resilience comes from verifying that systems remain stable under pressure. Not just in theory, but in practice.
On July 24, 2025, we successfully performed a full production failover of our core control-plane database from Azure West US to East US 2 with zero customer impact.
This was a test across all control-plane traffic: every API request, every background job, every deployment and build operation. Preview and development traffic routing was affected, though our production CDN traffic, served by a separate globally-replicated DynamoDB architecture, remained completely isolated and unaffected across our 19 regions.
This operation was a deliberate, high-stakes exercise. We wanted to ensure that if the primary region became unavailable, our systems could continue functioning with minimal disruption. The result: a successful failover with zero customer downtime, no degraded performance in production, and no postmortem needed.
Source: original entry ↗
More from Vercel
Follow Vercel to get its new changes in your feed and email digest.
OpenAI Decisions API now available on AI Gateway
OpenAI's Decisions API is now accessible through Vercel's AI Gateway with an OpenAI-compatible endpoint, enabling decision models to answer typed questions and return probabilities, choices, and scores for routing, triage, and guardrails use cases. Support is available across the OpenAI SDK, AI SDK, HTTP API, and CLI with the latest versions.
Timestamp attributes now supported in Vercel Flags
Vercel Flags now supports timestamp attributes for entities, allowing you to create time-based targeting rules. Use this feature to run limited-time campaigns, show content between specific dates, or target users based on registration date.
Glyph Cluster now available in stealth on AI Gateway
Glyph Cluster, a reasoning model for coding and long-context analysis, is now available as a stealth model on Vercel's AI Gateway for Pro and Enterprise plan teams with purchased AI Gateway credits at no cost during the stealth period. The model supports function calling, streams responses, and can be accessed via AI SDK, OpenAI-compatible APIs, and coding agents.