Amazon CloudFront - Collapsed request answered with Cache-Control: no-store
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Scenario:
- There has been no previous requests on an object.
- CloudFront behavior is default (CacheOptimized).
- Several requests enough to make request collapsing reached to one Edge Location
- Origin server responded with Cache-Control: no-store
How does Amazon CloudFront react?
I think it will send all other requests to origin, but wanted to confirm.
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CloudFront will collapse the request for traffic spike scenario regardless of no-store and/or no-cache directive. https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/RequestAndResponseBehaviorCustomOrigin.html#request-custom-traffic-spikes
In the logs you will see something like "NonS3CollapsedHit" for something that's normally a MISS/uncacheable.
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