The Gamma Cluster

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.

System details

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

User support

Guides, documentation and FAQ.

Getting access

Applying for projects and login accounts.

System status

Everything OK!

No reported problems


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