IBM Scale-out File Services
Scale out File Services (SoFS) is a highly scalable, grid-based network-attached storage (NAS) implementation developed by IBM. It is based on IBM's high-performance shared-disk clustered file system Spectrum Scale. SoFS exports the clustered file system through industry standard protocols like Server Message Block, Network File System, File Transfer Protocol and Hypertext Transfer Protocol.
Source: Wikipedia — IBM Scale-out File Services (CC BY-SA 4.0)