Best Practices Considerations: Which Interface to Use, and Limitations
The Fast Purge application and Fast Purge API programs are best suited for use when you have a set of individual objects whose name (ARL or URL) is known in advance. You can remove many thousands of individual objects using Fast Purge, which efficiently removes the content from the edge servers in batches. If there are more than about 10,000 objects, you should consider purge by CP code. ECCU is best used when you need to use rules such as directory or extension or more complex rules.
CAUTION: Whenever you use any purge mechanism, make sure you update the content on your origin server before submitting the request. Refresh instructions reach the edge servers within seconds even though the final confirmation of completion takes time to arrive.