Multiple ChoiceIntermediate 45s
CDN invalidation tradeoff
A team needs to update a popular CDN-cached image within seconds globally. Which approach is generally most reliable?
Options
- 1Rely on the object's TTL expiry to propagate the update once the cached copy ages out on each edge PoP independently
- 2Purge-by-URL invalidation propagated to all PoPs, or content-versioned URLs (cache-busting) for instant effect
- 3Restart all edge nodes so their on-disk caches clear and they are forced to refetch the new image from the origin
- 4Disable caching entirely for that asset's path so every request is served directly from the origin for the foreseeable future
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