NAStore 3 is the third-generation of mass storage systems to be developed at NAS, the Numerical Aerospace Simulation facility, located at NASA/Ames Research Center. It consists of three main parts: the volume management system (volman), the virtual volume management system (vvm), and the DMFS (data migration file system) system.
A complete description of the NAStore 3 system is beyond the scope of this document. I will give a brief overview, and then descrive DMFS's role in NAStore 3.