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CCS Linux Clusters

If you have questions that are not addressed within the wiki please contact


Available Clusters

There are two clusters available for job submission at the CCS. Sphynx is our newest cluster with 576 cores, homogeneous hardware, and QDR Infiniband. Ares, our older cluster, has 252 cores spread out across two, four, eight, and sixteen core nodes.

The two clusters' technical specifications are listed below:


  • Cores: 576 total cores (192 2.4GHz AMD Opteron 6136, 192 2.6GHz AMD Opteron 6212, 192 2.8GHz AMD Opteron 6220)
  • Network bandwidth: 40Gb/sec Infiniband
  • Memory: 2.25TB (4GB/core)
  • Disk Array: 20TB via 40Gb/s Infiniband


  • Cores: 180 2.0-2.4 GHz AMD Opteron
  • Network bandwidth: 10Gb/sec Infiniband
  • Memory: 504GB (2GB/core)
  • Disk Array: 20TB via 1Gb/s Ethernet

Obtaining an Account

To obtain an account with the CCS you must first fill out a resource request form and submit it for review here.

Changing Your Password

Log into Sphynx and run the passwd command to change your password. Replace remoteuser with your CCS cluster username.

user@localhost> ssh's password: 
Last login: Tue Aug 14 13:50:50 2012 from

remoteuser@sphynx> passwd

Changing password for user remoteuser.
Enter login(LDAP) password: 
New password: 
Retype new password: 
LDAP password information changed for remoteuser
passwd: all authentication tokens updated successfully.


General Linux Usage

Cluster Usage

Batch Queuing System



Disk Usage

Users' home directories are located in either /u00 or /u01. Home directories have a very small quota and should only be used for storing source code and notes.

Jobs run on the cluster should be configured to write output data within your /scratch03/user directory.

Compute nodes in the cluster do not have permission to write to your home directory.

The CCS does not keep backups of data in scratch directories.

Available Software

Much of the software available to you on ares requires many environment variables to be set. To simplify this a command line utility named module is available.




  • PETSc - Portable Extensible Toolkit for Scientific Computation
  • Eigen3 - C++ template library for linear algebra: matrices, vectors, numerical solvers, and related algorithms
  • Clawpack - "Conservation Laws Packageā€

Advanced Cluster Topics

Past Events

Consult the User's Guide for information on using the wiki software.

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