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Data Application Cluster (DAC)

The DAC is the replacement/upgrade for the current 4dwx system that consists of 3 separate PCs. It contains 4 rack-mounted computers, 3 operational and 1 spare. These computers all have dual PIV processors, 2GB of memory, a standard 10/100 NIC card, a Gigabit ethernet card, and 2 36GB hard drives (configured with RAID 1 using ext3). All of the machines are backed up via 2 UPSs contained in the tower rack. The DAC also includes a 14-drive, ext3 RAID5 with approximately 1TB of disk space, a Gigabit ethernet switch, a remote power controller, a KVM switch, and a multiple tape archiving system.

Real Time-Four Dimensional Data Assimilation (RT-FDDA)
Model Application Cluster (MAC)

The MAC is a platform designed to run the MM5 model, the RT-FDDA model, and other software. It can have between 16 and 32 nodes, 1 master and a number of slaves. Each node is a rack-mounted PC with dual PIV CPUs, 250MB of memory, a standard 10/100 NIC card, a Gigabit ethernet card (Myrinet) and 36GB hard drives. The RAC also contains a 7-disk RAID5 with 350GB of disk space, UPS backups, 1 or more KVM switches, a GB ethernet switch, and a multiple tape archiving system.