The Replify WAN Accelerator is able to identify a number of protocols and apply protocol-specific optimization. For example, the efficiency of the ‘chatty’ CIFS file sharing protocol is greatly improved by Replify’s read ahead and write behind optimizations. For HTTP, the Replify Accelerator is able to reduce the cost of messages by using lossless encoding for lengthy header information. Many other protocols are optimized in a variety of specific ways but even without protocol specific optimization, the Replify Accelerator WAN technology still delivers world class optimization for other traffic types.
Where the appropriate keys are provided, our WAN Optimization technology is able to safely and securely accelerate SSL connections using the latest and most secure TLS protocols and features. In addition, the Replify Accelerator is able to secure normally insecure application traffic using TLS between nodes.
Block Level De-duplication
The Replify Intelligent Caching Engine identifies which bytes are suitable for caching and efficiently hashes, stores and then transports the bytes to the connected Replify Accelerator 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 Replify Accelerator takes care of the integrity and synchronization of the cache data, ensuring the correct data is always delivered quickly and efficiently to the client.
Unlike a traditional cache, the Replify engine works across protocols and for uploads and downloads. This means any file that is cached by Replify from an email attachment, will also be offloaded if the same file is uploaded or downloaded via HTTP or a file server. This provides particular benefit for remote or home workers.
We simply take the data emerging from the first and second optimization stages above, and compress it using a lossless compression protocol. This typically gives a 50% reduction in data volumes for many common uncompressed data types such as XML, Office documents, database queries, file transfers and many web applications.
Replify’s TCP optimization technology ensures that connections across the WAN are tuned to mitigate the effects of high latency and packet loss. This helps to improve the user experience by increasing the responsiveness of the applications.
The Replify Accelerator can re-use optimized connections over the WAN to eliminate the latency caused by the TCP handshake and so return the server response to the client faster.