"Super-Kamiokande," Institute for Cosmic Ray Research, University of Tokyo

Subterranean system:

The real-time, "subterranean system" demands high operational uptime. It is connected to the experiment observation system through a dedicated interface, and performs data collection and format conversion. Additionally, the system is designed so that experimental observational data is not lost, even if communication with the "surface system" data servers is lost. This provides a "backup" competency for collected data from events that cannot be observed a second time.

Surface system:

The "surface system" accumulates and analyzes observational data sent from the subterranean system (approx. 500 GB per day). The software running on the data analysis units removes unneeded event data and stores the observational data on the data servers.

Detailed event reconstruction software is then used to select and reconstruct neutrino events, utilizing the data stored on the data servers. Physical analysis is performed on the events selected to gain a more in-depth understanding of the properties and nature of neutrinos. This requires high CPU processing performance and high speed data access.

In order to provide high-speed parametric analysis processing, the system is capable of executing a maximum of 1,536 jobs, simultaneously. To assist in this, the file system design is such that a throughput performance of 2.5 GB per second (write speed) can be achieved.

• Fujitsu Receives Contract for x86 Cluster System from the University of Tokyo's Institute for Cosmic Ray Research (October 25, 2011)
  
• Fujitsu Wins Order from Institute for Cosmic Ray Research of University of Tokyo for Data Analysis System for Neutrino Research (January 12, 2007)

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