CDN / Edge Caching / Cache Invalidation
Kind: tension
Record: tension:cache-invalidation-cdn-edge-caching
Canonical: Schema
"cdn-edge-caching" (performance-core layer) is traded against "Cache Invalidation" (performance-core layer) — a principle cannot be scope-separated from a quality, metric, or cost it competes with; resolve by measuring "Cache Invalidation" and choosing an explicit operating point.
Listed in Tensions, after Memory Efficiency / CPU Cost and before Read Replica / Read-Your-Writes Consistency.