Accounting

Owned by Matthias Laeuter
Last updated: Nov. 12, 2024 by Tobias Watermann
2 min read

Content

Project account

NHR center NHR@ZIB follows NHR-wide regulations.

  • A User Account accesses a project account containing units of core hour. A project account can be a Test Project or a Compute Project.
  • A batch job on the compute system is charged by a number of core hour to measure the usage.
  • Usage of persistent storage including the tape library are currently not accounted.

Charge rates

NHR@ZIB operates system Lise with different Compute partitions. Properties for available (slurm-)partitions you find on the pages

Each partition holds a specific charge rate.

Compute partitionSlurm partitionCharge (core hour)
per 1 node per 1 h occupancy time		Remark

CPU CLX partition


cpu-clx

96
cpu-clx:test
cpu-clx:ssd

cpu-clx:large

144high memory layout
cpu-clx:huge

192

high memory layout
CPU Genoa partitioncpu-genoa
cpu-genoa:test		free of charge1test phase
GPU A100 partition



gpu-a100

600

four NVidia A100 (80 GB) per compute node

gpu-a100:shared

150 per GPU

600 for four NVidia A100 (80 GB) per node

gpu-a100:shared:mig

21.43 per MiG slice

four NVidia A100 (80 GB) splitted each into

two 2g.10gb slices (8 per node and currently 24 in total) and

one 3g.20gb slice (4 per node and currently 12 in total)

GPU PVC partitiongpu-pvcfree of charge1test phase

1: Practically the charge is a very small number (close to zero).

Job charge

The charge of core hours for a batch job depends on the number of nodes, the wallclock time used by the job, and the charge rate for the partition used. For a batch job with

  • a number of nodes n,

  • running with a wallclock time of t hours, and

  • on a partition with a charge rate charge_p

the job charge charge_j yields

charge_j = n * t * charge_p
Example 1: charge for a node reservation

A job on 10 nodes running for 3 hours on partition huge96 (= 192 core hour) yields a job charge of 5760 core hour.

Batch jobs running in the partition large96:shared access a subset of cores on a node. For a reservation of cores, the number of nodes is the appropriate node fraction.

Example 2: charge for a core reservation

A job on 48 cores on partition large96:shared (96 cores per node, 144 core hour) has a reservation for

num = 48/96 = 0.5 nodes. Assuming a wallclock time of 3 hours yields a job charge of 216 core hour.