Static Site Atomic Deployment & Edge Asset Router

Design a Vercel/Netlify-style immutable static deployment router mapping custom domains to content-addressed asset bundles with instant atomic rollbacks.

Max p99

≤ 38 ms

Availability

≥ 99.5%

Budget

≤ $2,550

Functional Requirements

FR-1GET /serve/{site_domain}/{asset_path} — Resolves active deployment ID and serves immutable asset.
FR-2POST /deployments/{site_domain}/promote — Atomically points domain alias to a new build manifest.
FR-3Retention & Lifecycle (site_domain) — Enforces TTL retention windows, deduplication, or archival compaction without blocking live reads or writes.
FR-4Must sustain traffic surges when origin blob storage suffers 5x gray latency.

Workload Profile

Baseline Requests28,000 Asset Read RPS / 500 Deploy Write RPS

Product Launch Spike82,000 Read RPS / 1,500 Write RPS

Active Working Set18 GB hot HTML/JS/CSS bundles

Traffic DistributionStrong Zipfian skew on viral landing site_domain hosts

Consistency Model

Eventual edge alias invalidation (< 3s) acceptable; content-hashed assets are immutable.

Rules: Costing price & marks distribution

Design Write-up

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