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Oakley

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 & Restrictions

GLPK is available to all OSC users without restriction. 

The following versions are available on OSC systems:

Glenn, Oakley

Principal Investigators of OSC projects are responsible for updating their authorized user list, their outside funding sources, and their publications and presentations that acknowledge OSC. All of these tasks can be accomplished through the ARMSTRONG portal (https://armstrong.osc.edu).

CFX

Glenn, Oakley

CFX is a computational fluid dynamics (CFD) program for modeling fluid flow and heat transfer in a variety of applications.

Occasionally, jobs that experience problems may generate emails from staff or automated systems at the center with some information about the nature of the problem. These pages provide additional information about the various emails sent, and steps that can be taken to address the problem.

Problem description

A common problem on our systems is for a user job to run a node out of memory or to use more than its allocated share of memory if the node is shared with other jobs.

Purpose

Notify you that we have placed a hold on emails sent to you from the HPC system.

Sample subject line

Emails sent to email address student@buckeyemail.osu.edu in the last hour exceeded the expected volume

Apparent sender

OSC Help <OSCHelp@osc.edu>

Purpose

Notify you that one or more of your jobs caused excessive load on one of the network file system directory servers.

Sample subject line

Your jobs on Oakley are causing excessive load on fs14

Apparent sender

OSC Help <OSCHelp@osc.edu> or an individual staff member

Purpose

Notify you that one or more of your jobs was running on a compute node that crashed due to a hardware problem.

Sample subject line

Failure of job(s) 919137 due to a hardware problem at OSC

Apparent sender

OSC Help <OSCHelp@osc.edu>

Explanation

Your job failed and was not at fault. You should resubmit the job.

Purpose

Notify you that one or more of your jobs was running on a compute node that crashed due to a system software problem.

Sample subject line

Failure of job(s) 919137 due to a system software problem at OSC

Apparent sender

OSC Help <OSCHelp@osc.edu>

Explanation

Your job failed and was not at fault. You should resubmit the job. Usually the problems are caused by another job running on the node.

Purpose

Notify you that one or more of your jobs caused compute nodes to crash with an out-of-memory error.

Sample subject line

Failure of job(s) 933014,933174 at OSC due to exhaustion of physical memory

Apparent sender

OSC Help <oschelp@osc.edu>

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