Invalidating the cache

22-Nov-2019 23:21 by 4 Comments

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If you want to invalidate selected objects but your users don't necessarily access every object on your origin, you can determine which objects viewers have requested from Cloud Front and invalidate only those objects.To determine which objects viewers have requested, enable Cloud Front access logging.

The proxy can choose to either discard the content immediately, or do so when it is next requested.Otherwise, when Cloud CDN re-requests the content from your backends, it may once again cache the still-incorrect content.Each invalidation request specifies a path pattern that identifies the object or set of objects that should be invalidated.You can force an object, or set of objects, to be ignored by the cache by requesting a cache invalidation.It is important to ensure your backend virtual machine instances or storage buckets are returning the correct content before you request the cache invalidation.When do you want to combine both flush and invalidate?

I heard that while playing with device control descriptors we need to synchronize by combining flush and invalidate. Do we need to follow a sequence like flush followed by invalidate?This page provides an overview of Google Cloud CDN cache invalidation.To learn how to invalidate cached content, read Invalidating Cached Content.Important You can invalidate most types of objects that are served by a web distribution, but you cannot invalidate media files in the Microsoft Smooth Streaming format when you have enabled Smooth Streaming for the corresponding cache behavior.In addition, you cannot invalidate objects that are served by an RTMP distribution.You can submit a specified number of invalidation paths each month for free.