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habrok:job_management:scheduling_system [2024/11/18 12:14] – Remove html pedrohabrok:job_management:scheduling_system [2026/06/29 12:40] (current) – [Resource allocation: Jobs and jobscripts] pedro
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 When resources are available jobs will start immediately. If the requested resources are not available jobs will be put in a queue. The ordering of this queue is based on priority. High resource usage will lower your priority for new jobs. A period of low activity will cause your priority for new jobs to increase again.  When resources are available jobs will start immediately. If the requested resources are not available jobs will be put in a queue. The ordering of this queue is based on priority. High resource usage will lower your priority for new jobs. A period of low activity will cause your priority for new jobs to increase again. 
  
-**IMPORTANT** For those that know most of this, or are to lazy to read the whole page there are some [[#guidelines_for_cpu_cores_time_and_memory|important guidelines that you should know]]. +<wrap important>For those that know most of this, or are to lazy to read the whole page there are some [[#guidelines_for_cpu_cores_time_and_memory|important guidelines that you should know]]. </wrap>
  
 ===== SLURM ===== ===== SLURM =====
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 ==== Nodes and cores ==== ==== Nodes and cores ====
  
-The requirements for nodes (full computers) and cores can be given using the parameters ''%%--%%nodes'', ''%%--%%ntasks'', ''--ntasks-per-node'', +The requirements for nodes (full computers) and cores can be given using the parameters ''%%--%%nodes'', ''%%--%%ntasks'', ''%%--%%ntasks-per-node'', 
 ''%%--%%ntasks-per-core'', ''%%--%%cpus-per-task'' and ''%%--%%ntasks-per-core''. Here is a basic description of what they mean: ''%%--%%ntasks-per-core'', ''%%--%%cpus-per-task'' and ''%%--%%ntasks-per-core''. Here is a basic description of what they mean:
  
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 |''%%--%%cpus-per-task''  |Number of threads per task (for multithreaded applications)                                |1            | |''%%--%%cpus-per-task''  |Number of threads per task (for multithreaded applications)                                |1            |
  
-**IMPORTANT** The numbers that are given here, depend on the capabilities of the program being run. Only for programs that can use multiple CPU cores the number of tasks and/or cpus per task may be set higher than 1. The number of nodes can only be higher than 1 for software that is capable of running on multiple physical computers, using network communication.+<wrap important>The numbers that are given here, depend on the capabilities of the program being run. Only for programs that can use multiple CPU cores the number of tasks and/or cpus per task may be set higher than 1. The number of nodes can only be higher than 1 for software that is capable of running on multiple physical computers, using network communication.</wrap>
  
-**VERY IMPORTANT! If you don't know if your program is capable of running in parallel, do not request multiple cores, or nodes! In most cases this is useless and a waste of resources.**+<WRAP important round center>**VERY IMPORTANT! If you don't know if your program is capable of running in parallel, do not request multiple cores, or nodes! In most cases this is useless and a waste of resources.**</WRAP>
  
 The precise requirements are determined by both the software and its scalability and by the user who has to decide himself how to balance runtime, waiting time in the queue and the number of jobs that he or she wants to run. The precise requirements are determined by both the software and its scalability and by the user who has to decide himself how to balance runtime, waiting time in the queue and the number of jobs that he or she wants to run.
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 The following table gives an overview and description of other useful parameters that can be used: The following table gives an overview and description of other useful parameters that can be used:
  
-^Parameter ^Description                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  ^ +^Parameter ^Description ^ 
-|%%--%%job-name |Specify a name for the job, which will be shown in the job overview                                                                                                                                                                                                                                                                                                                                                                                                                                                          +|%%--%%job-name |Specify a name for the job, which will be shown in the job overview |                                                                                                                                                                                                                                                                                                                                                                                                                                                         
 | |
 |%%--%%output   |Name of the job output file (default: slurm-<jobid>.out). Use %j if you want to include a job id in the filename.                                                                                                                                                                                                                                                                                                                                                                                               | |%%--%%output   |Name of the job output file (default: slurm-<jobid>.out). Use %j if you want to include a job id in the filename.                                                                                                                                                                                                                                                                                                                                                                                               |