...
- dfsmedia - the new implementation
- media - the old implementation
The default valie value is dfsmedia.
This section describes the new dfsmedia pipeline and its capabilities.
...
- Manually deleting the folder in the cache (i.e. delete the folder that has the assetid of the asset that should be deleted).
- Use the Administration DAM for Sitecore dashboard, it has a function called Image cache where you can delete the cache from through UI. DFS 9.2.0 - Administration dashboard