Origin Shield

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An intermediate cache layer between edge servers and the origin. When an edge server has a cache miss, it queries the origin shield instead of the origin directly. This reduces the number of requests hitting the origin server, especially during cache invalidation events or traffic spikes.

Key Properties

• Intermediate Cache Layer
• Origin Protection
• Collapsed Forwarding

Related

• Edge Caching (first layer of CDN caching)
• Cache Invalidation (shield absorbs invalidation thundering herd)

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