Owens

New User Resource Guide

Getting Started at OSC

This guide was created for new users of OSC.

It explains how to use OSC from the very beginning of the process, from creating an account right up to using resources at OSC.

OSC account setup

The first step is to make sure that you have an OSC username.

Turbomole

TURBOMOLE is an ab initio computational chemistry program that implements various quantum chemistry algorithms. It is focused on efficiency, notably using the resolution of the identity (RI) approximation.

GLPK

GLPK (GNU Linear Programming Kit) is a set of open source LP (linear programming) and MIP (mixed integer problem) routines written in ANSI C, which can be called from within C programs. 

Availability and Restrictions

Versions

The following versions are available on OSC systems:

Out-of-Memory (OOM) or Excessive Memory Usage

Problem description

A common problem on our systems is that a user's job causes a node out of memory or uses more than its allocated memory if the node is shared with other jobs.

If a job exhausts both the physical memory and the swap space on a node, it causes the node to crash. With a parallel job, there may be many nodes that crash. When a node crashes, the OSC staff has to manually reboot and clean up the node. If other jobs were running on the same node, the users have to be notified that their jobs failed.

Quantum Espresso

Quantum ESPRESSO (QE) is a program package for ab-initio molecular dynamics (MD) simulations and electronic structure calculations.  It is based on density-functional theory, plane waves, and pseudopotentials.

HOWTO: Use VNC in a batch job

SSHing directly to a compute node at OSC - even if that node has been assigned to you in a current batch job - and starting VNC is an "unsafe" thing to do. When your batch job ends (and the node is assigned to other users), stray processes will be left behind and negatively impact other users. However, it is possible to use VNC on compute nodes safely.

Training

OSC offers online and in-person training for new and advanced users on a variety of high performance supercomputing topics.

New! Online Training Courses

OSC has partnered with The Ohio State University to offer online training courses that clients can complete at their own pace at any time on the ScarletCanvas platform, Ohio State's public learning management system.

The first two available courses are:

TurboVNC

TurboVNC is an implementation of VNC optimized for 3D graphics rendering.  Like other VNC software, TurboVNC can be used to create a virtual desktop on a remote machine, which can be useful for visualizing CPU-intensive graphics produced remotely.

Availability and Restrictions

Versions

The versions currently available at OSC are:

Gnuplot

Gnuplot is a portable command-line driven data and function plotting utility.  It was originally intended to allow scientists and students to visualize mathematical functions and data.  

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