A purge is what happens when you pick out an object from the cache and discard it along with its variants. Fastly allows unlimited purging without having to do it one object at a time. These articles describe how to purge by affiliation, by URL, or even purge all of your site's cached content for a full refresh.
- Authenticating URL purge requests via API
- Setting Surrogate-Key headers based on a URL
- Setting Surrogate-Key headers for Amazon S3 origins
- Soft purges
- Wildcard purges