From NASD to DeltaFS: CMU and Los Alamos's Efforts in Building Large-Scale Filesystem Metadata
It has been a tradition that, every once in a while, we stop and reassess whether we need to build our next filesystems differently. A key previous effort was made by the Carnegie Mellon University's NASD project, which decoupled filesystem data communication from metadata management and leveraged object storage devices for scalable data access. Now, as we enter into the exascale age, once again, we need bold ideas to advance parallel filesystem performance if we are to keep with up the rapidly increasing scale of today's massively-parallel computing environments.