The NCCS runs the SGI Data Migration Facility (DMF) to manage long-term archived data. The archive service is run across a number of SGI servers: DMF servers, Network File System (NFS) edge-servers, login servers (aka. dirac1 and dirac2), and parallel data movers. The user community accesses the archive through the Dirac servers or via NFS on the Discover.
The Dirac servers were named in honor of the Physicist Paul Dirac who won the Nobel Prize with Erwin Schrodinger in 1933.
DIRAC (Archive) System Details
The Dirac (Archive) is made up of a number server systems:
2 DMF servers, 4 NFS edge-servers, 2 login servers (aka. dirac1 and dirac2), and seven parallel data movers
10 Gigabit Ethernet network connectivity
Approximately 3.4 PB of SAN attached Fibre Channel disk storage shared between the servers with SGI's Clustered XFS file system software
NFS access to the data portal file systems
In addition to the above system, the Dirac uses the following tape and tape library capabilities.