Leibniz data center

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Logo of the Leibniz data center
The institute building in the foreground, the computer building in the back

The Leibniz Computing Center (LRZ) of the Bavarian Academy of Sciences in Garching near Munich is the central computing center of the two Munich state universities Ludwig-Maximilians-Universität Munich and Technical University of Munich and the Academy of Sciences. The Munich University of Applied Sciences and many other academic institutions in the greater Munich area are connected to the Munich science network via the LRZ . The sponsor is the Bavarian Academy of Sciences, the LRZ is organizationally an academy institute.

Over 150 people are employed at it. The LRZ operates high- performance and high-performance computers .


The LRZ was founded in 1962 with the name "Commission for electronic computing"; today's name goes back to Gottfried Wilhelm Leibniz . Despite its name, the LRZ is not a member of the Leibniz Association . The LRZ is organized among other things in the Gauss Center for Supercomputing (GCS).

LRZ computer building ("Twin Cube")

In 2006 the LRZ moved from Munich to Garching near Munich, where it was expanded in 2010. The new location is divided into two institute wings with around 8700 m² of usable space, a lecture hall wing with around 1600 m² and the extended computer cube ("Twin Cube") with around 3200 m² of air-conditioned computer space and 6400 m² of additional infrastructure space.

High performance computing

Entrance to the LRZ

High performance computer

2000s: HLRB-I and HLRB-II

The high-performance computer Bayern I (HLRB-I) was based on a Hitachi SR8000-F1 / 168: 1512 Power-3 processors with 375 MHz each divided into 168 SMP nodes with 9 CPUs each (8 usable), 2 TFlop / s peak performance ( 1.7 TFlop / s LINPACK ), 1.4 TByte main memory, 10 TByte hard disk space. HI-UX was used as the operating system . When it was commissioned in 2000, it already achieved 1029 GFlop / s (LinPack) in the first expansion stage with 112 nodes, making it the fastest computer in Europe. In 2002 it reached place 14 in the TOP500 in the last expansion stage , making it the fastest computer in Germany. In June 2006 it was shut down due to the purchase of the HLRB-II.

The high-performance computer Bayern II (HLRB-II) was based on an SGI Altix 4700 with 9728 Intel Itanium 2 processor cores in 19 SMP nodes with 512 CPU cores each, 62.3 TFlop / s peak performance ( Rpeak ), 39 TB of RAM and 600 TByte of hard disk space.

2012: SuperMUC


In July 2009 it was decided to expand the data center with a second high-performance computer, the SuperMUC . A second, also cube-like building was added directly to the computer cube, which was completed in 2006. The cost of the extension was around 135 million euros and was borne by the federal government and the Free State of Bavaria. On July 20, 2012, the SuperMUC was officially put into operation at a ceremony to mark the 50th birthday of the LRZ with Federal Minister Annette Schavan and the Bavarian Minister of Science Wolfgang Heubisch. At this point in time, SuperMUC is number 40 on the list of computers with the greatest computing power in the world with more than 3 petaflops of computing power. In a national comparison it ranks third after the high-performance computing center in Stuttgart [HLRS] (17th place) and the Neumann Institute for Computing [NIC] (21st place) in Jülich. All three of the aforementioned high-performance computing centers are combined in the Gauss Center for Supercomputing .

SuperMUC was expanded by a further 3 petaflops computing power in a "phase 2" and put into operation on June 29, 2015.

In June 2019, the successor SuperMUC-NG took 9th place in the TOP500 list of the world's best computers. This makes it the fastest computer in the European Union and the second fastest computer in Europe (after Piz Daint in Switzerland).

SuperMUC is cooled with warm water and is therefore one of the most energy-efficient supercomputers in the world.

The LRZ is a Tier 2 institution within the LCG .

Linux cluster

The LRZ Linux cluster is, among other things, with over 10,000 Intel Haswell processor cores (Xeon E5-2697 v3) in almost 400 nodes (28 cores per node), as well as almost 10,000 Intel Knights Landing processor cores in almost 150 nodes ( 64 cores per node) and is mainly used to supply HPC to the universities in Bavaria, isb. of the Munich universities. The accumulated peak performance of all system parts is slightly below 1 PFlop / s.


In addition to services for high-performance computing, the data center offers a variety of services for university members, including:

  • Free internet access via wireless LAN and hotspots at many locations in the university network
  • Data storage for personal and shared use for studies and scientific projects, including synchronization on different end devices (LRZ Sync + Share)
  • PC pool and WLAN workstations for notebooks
  • Cloud computing
  • Center for Virtual Reality and Visualization
  • Large format scanner
  • Poster printing
  • Software and fonts
  • Courses
  • Web hosting (only for higher education institutions)

Web links

Commons : Leibniz-Rechenzentrum  - collection of images, videos and audio files

Individual evidence

  1. Extension of the LRZ building https://www.lrz.de/wir/erweiterung-2009/
  2. TOP500 supercomputer sites. TOP 10 Sites for June 2017. The TOP500 project, June 2017, accessed on September 4, 2017 (English).
  3. Commissioning SuperMUC phase 2 https://www.lrz.de/presse/ereignisse/2015-06-29_supermuc-phase2/
  4. LCG site list http://gstat-wlcg.cern.ch/apps/topology/

Coordinates: 48 ° 15 ′ 42 "  N , 11 ° 40 ′ 0"  E