Raad2

Qatar's flagship research supercomputer, a Cray XC40 acquired from Cray in 2016 and jointly bought by the Qatar Computing Research Institute and Texas A&M University at Qatar, now run by the Research Computing Center Group of Hamad Bin Khalifa University. The HBKU systems page lists 4,128 Intel Xeon Haswell cores at 24 cores and 128 GB per node on the Aries interconnect in a Dragonfly topology, 120+ TFLOPS of Linpack, and a DDN ExaScaler 7990X Lustre store of 800 TB; the Raad2-GFX extension adds eight NVIDIA V100 GPUs on four external nodes joined over FDR InfiniBand. The same page says 192 nodes while the history page says 172 compute nodes, and 172 nodes of 24 cores matches the 4,128 cores, so the node count is not recorded. The history page gives 2017 to the present, SUSE Linux with Slurm and 16 GB/s peak read bandwidth. It follows Saqr (2005 to 2008, Apple G5 Xserve cluster), Suqoor (2008 to 2013, 512-core SGI Altix) and the first Raad (2012 to 2017, about 2,200 Sandy Bridge cores and 12 K20 GPUs). The systems page also lists a Cray XC50 named Hazeem acquired in 2018 and moved to the same group in the second quarter of 2025; it is not recorded here for lack of specifications. Both fetched pages come from the same organisation and the system is not on the TOP500, so the tier is reported and the status date is the day the pages were read.