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The Gamma cluster at NSC was a compute resource of 240 compute nodes exclusively serving the researchers at Linköping University. Any staff researcher at Linköping University could apply for a CPU time allocation on Gamma or become member of an already existing project on it. Projects applied for one year at a time and were evaluated locally by NSC, deciding about granting the request. Allocation sizes spanned from 5000 CPUh/month to some hundred thousand CPUh/month on Gamma.
Gamma was first made available to users in June 2015. It was replaced by the Sigma cluster in 2018.
| Hardware | HP Cluster Platform 3000 with SL230s Gen8 compute nodes |
| Processors | 8-core Intel Xeon E5-2660 “Sandy Bridge” processors at 2.2GHz |
| Number of compute nodes | 240 |
| Compute nodes (thin) | 2 sockets (16 cores) with 32 GB DDR3 1600 MHz memory (228 nodes) |
| Compute nodes (fat) | 2 sockets (16 cores) with 128 GB DDR3 1600 MHz memory (10 nodes) |
| Compute nodes (huge) | 2 sockets (16 cores) with 256 GB DDR3 1600 MHz memory (2 nodes) |
| Available CPUh/month | 240 * 16 * 24 * 30 = 2 764 800 CPUh/month |
| Login node | 1 HP ProLiant DL380p Gen8 server |
| High speed interconnect | Mellanox Infiniband FDR high-speed interconnect |
| Node scratch storage | 108 TB (420 GB per thin node, 840 GB per fat/huge node) |
| Global file system | Gamma used NSC’s Centre Storage system (shared between Triolith and Gamma) |
| Operating system | CentOS Linux 6 |
| Batch queue system | Slurm |
User Area
Guides, documentation and FAQ.
Applying for projects and login accounts.
National Supercomputer Centre
Linköping University
581 83 LINKÖPING
SWEDEN
Org.nr: 202100-3096
VAT.nr: SE202100309601
