https://www.open-systems.com/sase/app...
Application Optimization caching identifies which bytes are suitable for caching. It efficiently hashes, stores and then transports the bytes to the other edge device or node.
The caching engine uses advanced rolling hash and indexing techniques to quickly and accurately locate blocks, and transports small block references in place of the original data. The Application Optimization engine takes care of the integrity and synchronization of the cache data, ensuring the correct data is always delivered quickly and efficiently to the branches or client. Unlike a traditional cache, the engine works across protocols for uploads and downloads. This means a file that is cached from an email attachment, will also be offloaded if the same file is uploaded or downloaded via HTTP or a file server.