#Batch script example run filess full
#Batch script example run filess software
#Batch script example run filess license

To receive an email for all types: #SBATCH -mail-type=ALL To receive an email when your job begins, ends or fails: #SBATCH -mail-type=BEGIN,END,FAIL You should use only one -mail-type= directive and include all the options you want. The email will be sent to the address we have on record for you. You may choose to receive email when your job begins, when it ends, and/or when it fails. The name may be up to 15 characters in length, no spaces are allowed, and the first character must be alphabetic.Įxample: #SBATCH -job-name=my_first_job Mail options The job name is used as part of the name of the job log files it also appears in lists of queued and running jobs. The default is the name of the batch script, or just 'sbatch' if the script is read on sbatch's standard input. You can optionally give your job a meaningful name.

#Batch script example run filess software

See the OSC documentation for the specific software package for details.Įxample requesting five abaqus licenses: #SBATCH name

#Batch script example run filess license

If you are using a software package with a limited number of licenses, you should include the license requirement in your script. powers of 10 - ask a computer science major.) Software licenses If you want to request a fraction of the memory on a node, we recommend you give the amount in MB, not GB 24000MB is less than 24GB. Note: The amount of memory available per node is slightly less than the nominal amount. For parallel jobs you must multiply the memory needed per node by the number of nodes to get the correct limit you should usually request whole nodes and omit the memory limit.ĭefault units are bytes, but values are usually expressed in megabytes (mem=4000MB) or gigabytes (mem=4GB). There is no need to specify a memory limit unless you need a large-memory node or your memory requirements are disproportionate to the number of cores you are requesting. The memory limit is the total amount of memory needed across all nodes. To request one node with use of 6 CPU cores and 1 GPU: #SBATCH -ntasks=6 To request 2 nodes with 2 GPUs (2-GPU nodes are only available on Pitzer) #SBATCH -nodes=2 The job can be constrained on 40-core (or 48-core) nodes only by using -constraint:

#Batch script example run filess full

However, under our current scheduling policy a parallel job (which uses more than one node) is always given full nodes. You can easily use just part of each node even if the entire nodes are allocated (see the section srun in parallel jobs).Ĭomputing nodes on Pitzer cluster have 40 or 48 cores per node. In some practices, you may want to request 4 nodes with 10 CPU cores per node: To request 6 CPU cores on the same node: #SBATCH -ntasks=6 Parallel job This is the default if you don't specify any tasks and nodes resource limit. To request one CPU core (sequential job): #SBATCH -ntasks=1 The properties differ between clusters but may include the number of cores per node, the number of GPUs per node (gpus), and the type of node. The tasks and nodes resource limits specify not just the number of nodes but also the properties of those nodes. A large overestimate may prevent your job from being backfilled or fitting into an empty time slot. An underestimate will lead to your job being killed.

It is important to carefully estimate the time your job will take. To request 20 hours of wall clock time: #SBATCH -time=20:00:00 The default value for walltime is 1:00:00 (one hour).

If your job ends early, you will be charged only for the time used.

If your job exceeds the requested time, the batch system will kill it. The walltime limit is the maximum time your job will be allowed to run, given in seconds or hours:minutes:seconds. Options used to request resources, including nodes, memory, time, and software flags, as described below. Alternatively, you may provide these directives (without the #SBATCH notation) on the command line with the sbatch command. The header lines may appear in any order, but they must precede any executable lines in your script. They provide job setup information used by SLURM, including resource requests, email options, and more. These are SLURM SBATCH directives or header lines.

ContentsĪ job script must start with a shabang #! ( #!/bin/bash is commonly used but you can choose others) following by several lines starting with #SBATCH. Blank lines can be included for readability. The # character indicates a comment, although lines beginning with #SBATCH are interpreted as SLURM directives. It consists of SLURM directives, comments, and executable statements. Some people like to name their scripts something like myscript.job or myscript.sh, but myscript works just as well.Ī job script is simply a shell script. It can be created using any text editor and may be given any name. A job script is a text file containing job setup information for the batch system followed by commands to be executed.