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 compute time.
Usage of persistent storage including the tape library are currently not accounted.

Content

Charge rates

NHR@ZIB operates system Lise which hold different Compute cluster containing different types of compute nodes each. The charge rates for the partitions are given in the table.

Cluster	Partition	Charge (core hour) per 1 node per 1 h occupancy time	Increased charge rate due to
CPU cluster	standard96 standard96:test	96
	large96 large96:test large96:shared	144	high memory layout
	huge96	192	high memory layout
GPU A100 cluster	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 cluster	gpu-pvc	0	test phase

Charge Rates for NHR@Göttingen

NHR@Göttingen operates system Emmy which hold different Compute cluster containing different types of compute nodes each. The charge rates for the partitions are given in the table.

one node in partition	charged "core hours" per 1h occupancy time	increased charge rate due to
standard96 standard96:test	96
large96 large96:test large96:shared	144	high memory layout
huge96	192	high memory layout
medium40 medium40:test	40
large40 large40:test	80	high memory layout
gpu	375	four NVidia V100 (32 GB) GPUs per node
grete	600	four NVidia A100 (40 GB)
grete:shared	150 per GPU	600: four NVidia A100 (40 GB) per node 1200: eight NVidia A100 (80 GB) GPUs per node
grete:interactive grete:preemptible	47 per MiG slice	four NVidia A100 (40 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)

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.

Select the account in your batch job

Batch jobs are submitted by a user account to the compute system.

For each job the user chooses one project that will be charged by the job. At the beginning of the lifetime of the User Account the default project is the Test Project.
The user controls the project for a job using the Slurm usage option --account at submit time.
For the User Account the default project for computing time can be changed under the link User Data on the Portal NHR@ZIB.

Example: account for one job

To charge the account myaccount
add the following line to the job script. 
#SBATCH --account=myaccount

After job script submission the batch system checks the project for account coverage and authorizes the job for scheduling. Otherwise the job is rejected, please notice the error message:

Example: out of core hour

You can check the account of a job that is out of core hour.
> squeue
... myaccount ... AccountOutOfNPL ...

Accounting

Charge rates

Charge Rates for NHR@Göttingen

Job Charge

Select the account in your batch job