The Bulgarian Supercomputing Centre (BGSC), situated in the premises of the State Agency for Information Technology and Communications (SAITC) in Sofia, operates and provides access to an IBM Blue Gene/P supercomputer, consisting of two racks, 2048 PowerPC 450 based compute nodes, 8192 processor cores and a total of 4 TB random access memory. Double-precision, dual pipe floating-point core acceleration is available on each core. Sixteen I/O nodes are connected via fibre optics to a 10 Gb/s Ethernet switch. When the system is enhanced with a new 10Gb/s switch in the near future, 16 more I/O nodes will be connected. The smallest partition size, available currently, is 128 compute nodes (512 processor cores).

Maximum LINPACK performance achieved: Rmax= 23.42 Tflops
Theoretical peak performance: Rpeak= 27.85 Tflops
Energy efficiency: 371.67 MFlops/W

The ranking of BGSC's system in http://top500.org list is as follows:

• November 2008 Edition -- 126th place;
• June 2009 Edition -- 245th place;
• November 2009 Edition -- 377 place;

National Centre for Supercomputing Applications Results for 2009 (in Bulgarian)

President Obama Honors IBM's BlueGene

Important Information for New and Existing Users -- Quick User Guide (in Bulgarian)

Library -- Supercomputers at Work (description is in Bulgarian)