What Resources Can I Use?
Charges for running jobs
When running your SLURM batch or interactive jobs on the Savio cluster under a Faculty Computing Allowance account (i.e. a scheduler account whose name begins with
fc_), your usage of computational time is tracked (in effect, "charged" for, although no costs are incurred) via abstract measurement units called "Service Units." (Please see Service Units on Savio for a description of how this usage is calculated.) When all of the Service Units provided under an Allowance have been exhausted, no more jobs can be run under that account. To check your usage or total usage under an FCA, please use our check_usage.sh script.
Please also note that, when running jobs on many of Savio's pools of compute nodes, you are provided with exclusive access to those nodes, and thus are "charged" for using all of that node's cores. For example, if you run a job for one hour on a standard 24-core compute node on the savio2 partition, your job will always be charged for using 24 core hours, even if it requires just a single core or a few cores. (For more details, including information on ways you can most efficiently use your computational time on the cluster, please see the Scheduling Nodes v. Cores section of Service Units on Savio.)
Usage tracking does not affect jobs run under a Condo account (i.e. a scheduler account whose name begins with
co_), which has no Service Unit-based limits.
What resources (hardware) your jobs have access to
You can view the accounts you have access to, partitions you can use, and the QoS options available to you using the
sacctmgr -p show associations user=$USER
This will return output such as the following for a hypothetical example user
lee who has access to both the
physics condo and to a Faculty Computing Allowance. Each line of this output indicates a specific combination of an account, a partition, and QoSes that you can use in a job script file, when submitting any individual batch job:
QOS fields indicate which partitions and QoSes you have access to under each of your account(s). The
Def QoS field identifies the default QoS that will be used if you do not explicitly identify a QoS when submitting a job. Thus as per the example above, if the user
lee submitted a batch job using their
fc_lee account, they could submit their job to either the
savio_bigmem partitions. (And when doing so, they could also choose either the
savio_normal QoS, with a default of
savio_normal if no QoS was specified.)
If you are running your job in a condo, be sure to note which of the line(s) of output associated with the condo account (those beginning with "co_" ) have their
Def QoS being a lowprio QoS and which have a normal QoS. Those with a normal QoS (such as the line highlighted in boldface text in the above example) are the QoS to which you have priority access, while those with a lowprio QoS are those to which you have only low priority access. Thus, in the above example, the user
lee should select the
co_physics account and the
savio2 partition when they want to run jobs with normal priority, using the resources available via their condo membership.