Anselm was the first ever supercomputer at IT4Innovations with a theoretical peak performance of 94 TFlop/s and was operated from 2013 to 2021.

During its operation, more than 2.6 million computing jobs were run on it in 725 research projects in fields such as material sciences, computational chemistry, biosciences, and engineering. At the end of January 2021, its operation permanently ceased and Anselm was moved to the World of Civilization exhibition in Dolní/Lower Vítkovice.

Anselm consisted of 209 computational nodes. Each node was equipped with 16 cores (two eight-core Intel Sandy Bridge processors). These compute nodes were interconnected by InfiniBand (QDR) and Ethernet networks. 

There were 4 types of compute nodes:

  • 180 compute nodes without any accelerator, with 2.4 GHz CPUs and 64 GB RAM,
  • 23 compute nodes with GPU accelerators (NVIDIA Tesla K20), with 2.3 GHz CPUs and 96 GB RAM,
  • 4 compute nodes with MIC accelerators (Intel Xeon Phi 5110P), with 2.3 GHz CPUs and 96 GB RAM,
  • 2 fat nodes with larger RAM and faster storage (2.4 GHz CPUs, 512 GB RAM and two SSD drives).

The total theoretical peak performance of the whole cluster was 94 TFlop/s with the maximal LINPACK performance of 73 TFlop/s.

All computing nodes shared a 320 TB/home disk storage to store user files. A 146 TB shared/scratch storage was available for scratch data. These file systems were provided by the Lustre parallel file system. There was a local hard drive (500 GB) on all compute nodes.
theoretical peak

technical information of the ANSELM supercomputer

put into operation

summer 2013

termination of operation January 2021

Theoretical peak performance

94 TFlop/s

operating system

RedHat Linux 64bit 6.x

compute nodes



2x Intel SandyBridge, 8 cores, 2,3 / 2,4 GHz,

3,344 cores in total

RAM per compute node

64 GB / 96 GB / 512 GB


4x Intel Xeon Phi 5110P

23x NVIDIA Tesla K20 (Kepler)


320 TiB / home (speed 2 GB /s),

146 TiB / scratch (speed 6 GB/s)


Infiniband QDR 40 Gb/s


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