hardware-overview.md



Hardware Overview
Karolina consists of 827 computational nodes of which 720 are universal compute nodes (Cn[001-720]), 70 are NVIDIA A100 accelerated nodes (Acn[01-70]), 1 is a data analytics node (DAcn1), and 36 are cloud partitions (CLn[01-36]). Each node is a powerful x86-64 computer, equipped with 64/128/768 cores (64-core AMD EPYC™ 7H12 / 32-core AMD EPYC™ 7452 / 24-core Intel Xeon-SC 8268) and at least 256 GB of RAM.
User access to Karolina is provided by four login nodes login[1-4]. The nodes are interlinked through high speed InfiniBand and Ethernet networks.
The Accelerated nodes, Data analytics node, and Cloud nodes are available upon request from a PI. For more information about accessing the nodes, see also the Resources Allocation Policy section.
For more technical information, see the Compute Nodes section.
The parameters are summarized in the following tables:


In general


Primary purpose
High Performance Computing


Architecture of compute nodes
x86-64


Operating system
Linux


Compute nodes


Total
827


Processor cores
64/128/768 (2x32 cores/2x64 cores/32x24 cores)


RAM
min. 256 GB


Local disk drive
no


Compute network
InfiniBand HDR


Universal compute node
720, Cn[001-720]


Accelerated compute nodes
70, Acn[01-70]


Data analytics compute nodes
1, DAcn1


Cloud compute nodes
36, CLn[01-36]


In total


Total theoretical peak performance  (Rpeak)
15.2 PFLOP/s


Total amount of RAM
248 TB


Node
Processor
Memory
Accelerator


Universal compute node
2 x AMD Zen 2 EPYC™ 7H12, 2.6 GHz
256 GB
-


Accelerated compute node
2 x AMD Zen 2 EPYC™ 7452, 2.35 GHz
512 GB
NVIDIA A100


Data analytics node
32 x Intel Xeon-SC 8268, 2.9 GHz
24 TB
-


Cloud compute node
2 x AMD Zen 2 EPYC™ 7H12, 2.6 GHz
256 GB
-