OSC has over two petabytes (PB) of disk storage capacity distributed over several file systems, plus almost 2PB of backup tape storage. (A petabyte is 1015, or a quadrillion, bytes.) This guide describes the various storage environments, their characteristics, and their uses.
Welcome to OSC! If you are new to supercomputing, new to OSC, or simply interested in getting an account (if you don't already have one), we have some resources to help you.
Each user ID has a home directory on one of the NFS shared file systems. You have the same home directory regardless of what system you’re on, including all login nodes and all compute nodes, so your files are accessible everywhere. Most of your work in the login environment will be done in your home directory.
OSC has several different file systems where you can create files and directories. The characteristics of those systems and the policies associated with them determine their suitability for any particular purpose. This section describes the characteristics and policies that you should take into consideration in selecting a file system to use.
The various file systems are described in subsequent sections.
The storage at OSC consists of servers, data storage subsystems, and networks providing a number of storage services to OSC HPC systems. The current configuration consists of:
OSC’s newest system, an HP-built, Intel® Xeon® processor-based supercomputer dubbed the Oakley Cluster, features more cores (8,328) on half as many nodes (694) as the center’s former flagshipsystem, the IBM Opteron 1350 Glenn Cluster. The Oakley Cluster can achieve 88 teraflops, tech-speak for performing 88 trillion floating point operations per second, or, with acceleration from 128 NVIDIA® Tesla graphic processing units (GPUs), a total peak performance of just over 154 teraflops.
The Ohio Supercomputer Center's IBM Cluster 1350, named "Glenn", features AMD Opteron multi-core technologies. The system offers a peak performance of more than 54 trillion floating point operations per second and a variety of memory and processor configurations. The current Glenn Phase II components were installed and deployed in 2009, while the earlier phase of Glenn – now decommissioned – had been installed and deployed in 2007.
We currently operate two major systems:
There are two ways to connect to our systems. The traditional way will require you to install some software locally on your machine, including an SSH client, SFTP client, and optionally an X Windows server. The alternative is to use our zero-client web portal, OnDemand.
Once your account is set-up you will receive a welcome letter from us containing your username and default password, which will allow you to register your ARMSTRONG account.
The ARMSTRONG portal provides many services to OSC users, including: