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getting_started_guide [2016/02/16 10:57]
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 **Submitting a Job** **Submitting a Job**
  
-The cluster uses [[http://www.schedmd.com|slurm]] for scheduling and resource management. Key commands to view the status of the cluster are+The cluster uses [[http://www.schedmd.com|SLURM]] for scheduling and resource management.Slurm 
 +is an open-source cluster resource management and job scheduling system that strives to be simple, scalable, portable, fault-tolerant, and interconnect agnostic. Slurm currently has been tested only under Linux. 
 + 
 +As a cluster resource manager, Slurm provides three key functions. First,it allocates exclusive and/or non-exclusive access to resources(compute nodes) to users for some duration of time so they can perform 
 +work. Second, it provides a framework for starting, executing, and monitoring work (normally a parallel job) on the set of allocated nodes. Finally, it arbitrates conflicting requests for resources by managing a queue of pending work. 
 +Key commands to view the status of the cluster are
  
 **sinfo** reports the state of partitions and nodes managed by SLURM. It has a wide variety of filtering, sorting, and formatting options **sinfo** reports the state of partitions and nodes managed by SLURM. It has a wide variety of filtering, sorting, and formatting options
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 **srun** is used to submit a job for execution or initiate job steps in real time. srun has a wide variety of options to specify resource requirements, including: minimum and maximum node count, processor count, specific nodes to use or not use, and specific node characteristics (so much memory, disk space, certain required features, etc.). A job can contain multiple job steps executing sequentially or in parallel on independent or shared nodes within the job's node allocation. **srun** is used to submit a job for execution or initiate job steps in real time. srun has a wide variety of options to specify resource requirements, including: minimum and maximum node count, processor count, specific nodes to use or not use, and specific node characteristics (so much memory, disk space, certain required features, etc.). A job can contain multiple job steps executing sequentially or in parallel on independent or shared nodes within the job's node allocation.
  
 +
 +**sbatch** is used to submit a job script for later execution. The script will typically contain one or more srun commands to launch parallel tasks.
  
 **scancel** is used to cancel a pending or running job or job step. It can also be used to send an arbitrary signal to all processes associated with a running job or job step. **scancel** is used to cancel a pending or running job or job step. It can also be used to send an arbitrary signal to all processes associated with a running job or job step.
 +
 +More information can be obtained from [[https://computing.llnl.gov/linux/slurm/quickstart.html|Slurm Quick User Guide]]
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getting_started_guide.txt · Last modified: 2017/10/19 10:53 (external edit)

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