CDN / Edge Caching

Kind: mechanism

Layer: Performance Core

Aliases: Content Delivery Network

Record: architecture:cdn-edge-caching

Severity: contextual

Scope: service, infrastructure, latency

Canonical: Ontology

A mechanism that serves cacheable content from servers near the requester, keyed by a fingerprint of the content.

Listed in Architecture principles, after Memory Efficiency and before Read Replica.

Requires

• Cacheable Content

Reinforces

• Caching
• Latency

Enables

• Origin Offload
• Geographically-Local Delivery

Conflicts with

• Origin-Only Serving

In tension with

• Cache Invalidation

Tensions

• CDN / Edge Caching / Cache Invalidation

Violated by

• Origin-Only Serving

Severity

• contextual

Category

• Scalability / Performance / Optimization

Linked from

• Scalability / Performance / Optimization
• Scalability / Performance / Optimization
• Severity levels
• The resolutions