HPC Resources/Leo

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The HPC is the newest machines named after Leo Szilard, a Physicist and inventor of the nuclear reactor. The Top500 qualified heavily accelerated machine has 252 Nvidia GPUs to enable running highly accelerated codes to help the 168 Sandy Bridge 8-core CPUs. The system is located at Debrecen, the second largest city in Hungary, and shown in Figure. The machine is integrated to PRACE European HPC network.


Technical Specification

Administrative Data
Name Leo
Short Description Hungarian HPC cluster
Owner NIIF Institute
Country Hungary
Computational Power
Number of servers 84
Server specification HP SL250S
CPU per server 2
RAM per server 125 GB
Total number of CPU-cores 1,344
Max number of parallel processes 2,688
Interconnect type FDR Infiniband
Interconnect latency 2.5 μs
Interconnect bandwidth 40 Gbps
Local filesystem type Lustre
Total storage (TB) 585
Accelerators type Nvidia K20x and K40x misc.
Number of cores 2688
Accelerators per server 3
Servers equipped with accelerators 84
Peak performance CPU (Tflops) -
Peak performance accelerators (Tflops) -
Peak performance (Tflops) 248
Real performance (Tflops) 208
Operating system Red Hat Enterprise Linux
Version 6.5
Batch system/scheduler SLURM
Development tools Intel SDK
Libraries Intel MKL, etc.
Applications Maple, Matlab, etc.
Dedication to VI-SEEM
CPU (percent) 10%
Storage (percent) 0%
Accelerators (percent) 10%
CPU (core-hours per year) 588,672
Storage in TB 0
Accelerators (hours per year) 125,269,402
System operational since 2015
Available to the project from PM04
Expected date system to be phased out N/A
Interfaces SSH