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CACDS User Guide

Welcome to the CACDS User Guide. We operate multiple compute resources. Sabine is the latest addition. Opuntia is CACDS's most used compute cluster, and Maxwell is still around.

The pages below explain how to access and use the CACDS high-performance computing environment.

If you seek additional help or information not contained in these pages, please open a support ticket.

Getting Started on Sabine
A quick start guide to get running on Sabine for first-time users.
What's new on Sabine
Get to know the new Sabine cluster.
Getting Started on Opuntia
A quick start guide to get running on Opuntia for first-time users.
Maxwell User Guide
A quick start guide to get running on Maxwell. 
Frequently Asked Questions 
Frequently Asked Questions about CACDS systems.
Application Development
Learn about the development environment on our clusters, the installed compilers from Intel, GNU and Portland Group (PGI) and their usage in C, C++ and Fortran to create OpenMP, MPI, hybrid and serial programs.
Job Execution
Learn how to run interactive jobs, or submit batch job(s) to the queues, monitor your job in the queue and job exit status.
File Systems and Data Handling
The Opuntia system has different file systems which provide different levels of disk storage, I/O performance and file permanence. Find information on I/O optimization, disk quotas and purging.
Example demonstrating how to debug on CACDS resources.
View software installed on Opuntia and how to manage software access using GNU modules.
See also Complete Software Module List
Technical terms used in the User Guide.
Information about allocations.

To make the User Guide more accessible, we have tried to explain key terms in a non-technical way. When reading the User Guide pages, please keep in mind the following:

  • a   core  is the microprocessor that carries out the computation (also, "central processing unit", or CPU),
  • a   node  is a machine that will handle your computing tasks (it has memory, cores and an operating system),
  • a   partition  is a collection of nodes with similar technical specifications (amount of memory,   etc.), and
  • the   cluster  is the complete collection of nodes with networking and file storage facilities.