Matter was decommissioned on June 12th, 2015 and replaced by the Gamma cluster.


Matter is a Linux-based cluster with 516 compute nodes and a combined peak performance of 37 TFLOPS.

Each compute node (HP SL170z) is equipped with two quad-core processors of type Intel® Xeon® E5520 and 36 GB RAM. There are also four "fat" nodes with two Intel® Xeon® X5570 CPUs and 144 GB RAM.

System Details

Hardware HP Cluster Platform with SL170z G6 compute nodes
Processors 4-core Intel Xeon E5520 processors at 2.2GHz
Number of compute nodes 516
Compute node (thin) 2 sockets (8 cores) with 36 GB memory (512 nodes)
Compute node (fat) 2 sockets (8 cores) with 144 GB memory (4 nodes)
Login nodes One HP ProLiant DL180 G6 server, accessible using SSH
High speed interconnect Infiniband QDR high-speed interconnect
Node scratch storage 258 TB (500 GB per node)
Global file system Matter used NSC's Centre Storage
Operating system CentOS Linux 5
Batch queue system Slurm

Computing services provided by Matter

  • Running traditional HPC batch jobs, submitted from the login node ("head node")
  • Interactive use of compute nodes (for e.g test, development or to run graphical applications)

Research performed with Matter

Kappa is open for users within Linköping University.


  • 2010 - Matter was installed (funded by the MATTER consortium)
  • November 1, 2014 - MATTER consortium funding for Matter ended
  • November 2, 2014 - Matter continues in operation as a LiU-funded system
  • June 12th, 2015 - Matter retired

Who can use Matter?

Access to Kappa is granted by NSC. Local researchers at Linköping university can apply for computing time on Kappa. See applying for a new project for details.

User Area

User support

Guides, documentation and FAQ.

Getting access

Applying for projects and login accounts.

System status

Everything OK!

No reported problems


NSC Express