Starting from quarter 03/2022, the two NHR centers,

• NHR@ZIB and
• NHR@Göttingen

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account in the new unit core hours. The Both NHR centers provide computational resources primarily to scientific institutions in Germany under public law. The details regarding the policies for resource allocation and payment are prescribed by the Fees And Regulations on the HLRN webpage Zulassungs- und Entgeltordnung considering the unit conversion 1 NPL = 6 core hour.

• A user accesses an NPL account containing a number of NPL (Norddeutsche Parallelrechner-Leistungseinheit/north-german parallel-computer work unit).HLRN charges units core hour.
• The NHR centers charge for batch jobs on the compute systemsystems. The charge for a job is a number of NPLunits core hour.
• Usage of magnetic tapes or hard disk capacity is currently not accounted.

Charge rates

The HLRN operates NHR centers operate different types of compute nodes (HLRN-IV system) organized in partitions, see Hardware. The charge rates for the partitions are given in the table.

Job charge

The charge for a batch job on a HLRN system is a number of NPLs and is calculated from the number of nodes reserved for the job, the wallclock time used by the job, and the charge rate for the job nodes. For a batch job with

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