The National Institute for Computational Sciences


Nautilus was decommissioned on May 1, 2015. For more information, see Nautilus Decommission FAQs.

Nautilus is an SGI Altix UV system consisting of one UV1000 (Nautilus), 4 UV10s (Harpoon nodes), and 3 login nodes (Arronax, Conseil, and Nedland). The UV1000 has 1024 cores (128 8-core Intel Nehalem EX processors), 4 terabytes of global shared memory, and 8 GPUs in a single system image. In addition, each UV10 provides 32 cores, 128 GB, and 2 GPUs. Nautilus currently has a CPU speed of 2.0 GHz and a peak performance of 8.2 Teraflops. The Lustre file system Medusa, with 1.3 PB capacity, is mounted on Nautilus.

The primary purpose of Nautilus is to enable data analysis and visualization of data from simulations, sensors, or experiments. Nautilus is intended for serial and parallel visualization and analysis applications that take advantage of large memories, multiple computing cores, and multiple graphics processors. Nautilus allows for both utilization of a large number of processors for distributed processing and the execution of legacy serial analysis algorithms for very large data processing by large numbers of users simultaneously.


Nautilus hardware support is provided 8:00am – 5:00pm ET on weekdays excluding holidays. Issues occurring on nights and weekends will be addressed the following business day.

Nautilus supports OTP token and GSI authentication. GridFTP is also available for file transfers.