Rockfish a community-shared cluster at Johns Hopkins University and housed at Maryland Advanced Research and Computing Center in Baltimore. It follows the “condominium model” with three main units. The first unitis based on an NSF Major Research Infrastructure grant, a secondunitcontains mainly medium-size condos (for example DURIP/DoD, Deans’ contributions condos), and the lastunitis a collection of individual research groups condos. All threeunitsare shared, with no physical separation, by all users.
Rockfish has 34,128 cores (711 nodes), a combined theoretical performance of 3.3 PFLOPs and Rmax of 2.1 PFLOPs. Rockfish has three parallel file systems (GPFS) with a total of ~13PB of usable space. The Rockfish cluster has Mellanox Infinidad HDR100 connectivity (1:1.5 topology).