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The srun command has a significant number of options to control the execution of your application closely.
However, you can use it for a simple launch of a serial program, as Example 8-1 shows.
Example 8-1 Simple Launch of a Serial Program
$ srun hostname
n1
The srun Roles and Modes
The srun command submits jobs to run under SLURM management. The srun command can perform many
roles in launching and managing your job. The srun command operates in several distinct usage modes
to accommodate the roles it performs.
The srun Roles
srun options allow you control a SLURM job by:
• Specifying the parallel environment for your job when you submit it, such as the number of nodes to
use, partition, distribution of processes among nodes, and maximum time.
• Controlling the behavior of your parallel job as it runs, such as by redirecting or labeling its output,
sending it signals, or specifying its reporting verbosity.
The srun Modes
The srun command has five distinct modes in which it can be used:
• Simple mode
• Batch mode
• Allocate mode
• Attach mode
• Batch (with LSF-HPC) mode
The
SLURM Reference Manual
describes the Simple, Batch, Allocate, and Attach modes.
You can submit a script to LSF-HPC that contains (simple) srun commands to execute parallel jobs later. In
this case, LSF-HPC takes the place of the srun -b option for indirect, across-machine job-queue management.
Using the srun Command with HP-MPI
The srun command can be used as an option in an HP-MPI launch command. Refer to Chapter Chapter 5:
Submitting Jobs for information about using srun with HP-MPI.
Using the srun Command with LSF-HPC
The srun command can be used in an LSF-HPC launch command. Refer to Chapter Chapter 9: Using LSF
for information about using srun with LSF-HPC.
Monitoring Jobs with the squeue Command
The squeue command displays the queue of running and waiting jobs (or "job steps"), including the JobID
used for scancel), and the nodes assigned to each running job. It has a wide variety of filtering, sorting,
and formatting options. By default, it reports the running jobs in priority order and then the pending jobs in
priority order.
Example 8-2 reports on job 12345 and job 12346:
Example 8-2 Displaying Queued Jobs by Their JobIDs
$ squeue --jobs 12345,12346
JOBID PARTITION NAME USER ST TIME_USED NODES NODELIST
12345 debug job1 jody R 0:21 4 n[9-12]
12346 debug job2 jody PD 0:00 8
64 Using SLURM
- HP XC System Software 1
- User's Guide 1
- Table of Contents 3
- 5 Submitting Jobs 4
- 6 Debugging Applications 5
- 7 Tuning Applications 5
- 8 Using SLURM 5
- 9 Using LSF 5
- 10 Advanced Topics 6
- List of Figures 7
- List of Tables 9
- List of Examples 11
- About This Document 13
- HP XC Information 14
- For More Information 15
- Supplementary Information 15
- Related Information 16
- Related Linux Web Sites 17
- Related MPI Web Sites 17
- Related Compiler Web Sites 17
- Additional Publications 17
- Typographic Conventions 18
- HP Encourages Your Comments 18
- System Architecture 19
- Node Specialization 20
- Storage and I/O 20
- File System 21
- System Interconnect Network 22
- User Environment 23
- Run-Time Environment 24
- Standard LSF 25
- 2 Using the System 27
- Introduction 28
- 30 Using the System 30
- Overview of Modules 31
- Supplied Modulefiles 32
- Viewing Available Modulefiles 33
- Viewing Loaded Modulefiles 33
- Loading a Modulefile 33
- Unloading a Modulefile 34
- Modulefile Conflicts 34
- Creating a Modulefile 35
- 4 Developing Applications 37
- Interrupting a Job 38
- Setting Debugging Options 39
- Modulefiles 40
- Standard 41
- 42 Developing Applications 42
- Developing Libraries 43
- 44 Developing Applications 44
- 46 Submitting Jobs 46
- 48 Submitting Jobs 48
- Compiling applications 49
- HP-MPI User's Guide 49
- 50 Submitting Jobs 50
- Running Preexecution Programs 51
- 52 Submitting Jobs 52
- SSH and TotalView 54
- Setting Up TotalView 54
- Using TotalView with SLURM 54
- Using TotalView with LSF-HPC 55
- Setting TotalView Preferences 55
- Debugging an Application 55
- TotalView process window 56
- Exiting TotalView 57
- 60 Tuning Applications 60
- The srun Roles and Modes 64
- Job Accounting 65
- Fault Tolerance 66
- Security 66
- Overview of LSF-HPC 68
- Using LSF-HPC 69 69
- Job Terminology 70
- Using LSF-HPC 71 71
- Notes on LSF-HPC 72
- Using LSF-HPC 73 73
- Job Startup and Job Control 74
- Preemption 75
- Getting Host Load Information 76
- Submitting Jobs 77
- LSF-SLURM External Scheduler 78
- Using LSF-HPC 79 79
- 80 Using LSF 80
- Examining the Status of a Job 81
- 82 Using LSF 82
- Using LSF-HPC 83 83
- 84 Using LSF 84
- Using LSF-HPC 85 85
- 86 Using LSF 86
- Using LSF-HPC 87 87
- 88 Using LSF 88
- Using LSF-HPC 89 89
- 92 Advanced Topics 92
- 94 Advanced Topics 94
- Example Procedure 1 95
- Example Procedure 2 95
- Local Disks on Compute Nodes 96
- Communication Between Nodes 97
- Appendix A Examples 99
- Submit the job: 100
- View the job: 100
- 102 Examples 102
- Show the environment: 103
- Display the script: 103
- Run the job: 103
- Show the SLURM job ID: 104
- Show the job allocation: 104
- Exit the pseudo-terminal: 105
- View the interactive jobs: 105
- View the finished jobs: 105
- View the node state: 105
- View the running job: 106
- View the finished job: 106
- Glossary 109
- 110 Glossary 110
- 112 Glossary 112
- 116 Index 116
- 118 Index 118
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