The HLRN alliance jointly operates a distributed supercomputer system hosted at the sites Georg-August-Universität Göttingen und Zuse Institute Berlin (ZIB). In September 2018 the HLRN-IV system phase 1 from the company Atos/Bull was put into operation. After the successful installation of phase 2 the total HLRN-IV system will hold more than 200,000 cores with a total peak performance of about 16 PFlop/s.
The HLRN complex in Berlin at ZIB is named after Lise Meitner and it conatins 1146 compute nodes with 110,016 compute cores.
At the site Göttingen University the HLRN system phase 1 named Emmy (for Emmy Noether) is operated since October 2018.
There are three different file systems available for Göttingen and Berlin respectively.
The HOME file system uses the DDN GRIDScaler (Spectrum Scale) with DDN SFA7700X block storage. There are 340TiB of storage space available, 280TiB of which can be utilized by our users. The remaining 60TiB are reserved for Snapshots as well as for the software in the module system. The file system supports disk and inode quotas for groups and users, which are tested on all nodes for every file access. Additionally, all the usual tools e.g. hard- and soft-limits, grace periods are available on user, group and fileset level. The HOME file system is exported via NFS to the login and compute nodes.
The HOME file system is constantly backed up and there are daily snapshots available.
The WORK file system is a DDN EXAScaler (DDN Lustre) with two DDN ES18K embedded-storage systems per site. These systems have integrated OSS and a scalable MDS unit. This storage system has a net capacity of 8.1PiB per site and a read/write performance of 81GiB/s.
The work file system does not have automatic backups.
The archiving solution in Göttingen uses a Tape-Library with StorNext. The system can be accessed from the login nodes and consists of two nodes, which have the archive mounted as the home file system. These nodes support 1GiByte/s per data stream and 5GiByte/s overall bandwidth for the connection to the archive.
The ZIB uses a Hierarchical Storage Management (HSM) system with Sun StorEdge SAM-FS as a mangement software.