1. GRAPE 현황

2. Hardware Configuration Master –2 x Dual Core Xeon 5130 (2 GHz) –2 GB memory –500 GB hard disk 4 Slaves –2 x Dual Core Xeon 5130 (2 GHz) –1 GB memory –80 GB hard disk GRAPE6-BLX Boards –Each has a particle memory size of 260K. –Each has peak performance of ~ 130 Gflops. Giga Bit Switching Hub & UPS

5. Softeware Configuration Cluster Environment –Redhat Enterprise WS –MPICH, MPICH2 –PBS Queue service –NFS (Network File System) –NIS (Network Information Service) in preparation Almost no security measures –Frequent backup suggested

6. Speed Test ParticleProcessor Wallclock Time (s) 110,0001 6030 220,000111000 220,0004 3060 880,000411600 –Compound Galaxy (Halo, Disk & Bulge) –Makino’s parallel tree code for GRAPE –~ 1 Gyr –Error in energy less than 0.1% –Almost no difference when using 100 MBps hub