While EXT4 and Btrfs are the most talked about file-systems on Phoronix, there are certainly many more out there, especially when it comes to distributed file-systems and those largely only targeting enterprise environments. One example is XtreemFS, which is an open-source file-system that is distributed with support for clients and servers from any location and connected together using the Internet. This GPLv2-licensed file-system is also meant to easily replicate data across data-centers to reduce latency and network traffic.