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Pseudo-parallel job A job that requests only one slot but specifies any of these constraints:
• mem
• tmp
• nodes=1
• mincpus > 1
Pseudo-parallel jobs are allocated one node for their exclusive use.
NOTE: Do NOT rely on this feature to provide node-level allocation
for small jobs in job scripts. Use the SLURM[nodes] specification instead,
along with mem, tmp, mincpus allocation options.
LSF-HPC considers this job type as a parallel job because the job requests
explicit node resources. LSF-HPC does not monitor these additional
resources, so it cannot schedule any other jobs to the node without risking
resource contention. Therefore LSF-HPC allocates the appropriate whole
node for exclusive use by the serial job in the same manner as it does for
parallel jobs, hence the name “pseudo-parallel”.
Parallel job A job that requests more than one slot, regardless of any other constraints.
Parallel jobs are allocated up to the maximum number of nodes specified
by the following specifications:
• SLURM[nodes=min-max] (if specified)
• SLURM[nodelist=node_list] (if specified)
• bsub -n
Parallel jobs and serial jobs cannot run on the same node.
Small job A parallel job that can potentially fit into a single node, and does not
explicitly request more than one node (SLURM[nodes] or
SLURM[node_list] specification). LSF-HPC tries to allocate a single
node for a small job.
10.5 Using LSF-HPC Integrated with SLURM in the HP XC Environment
This section provides some additional information that should be noted about using LSF-HPC in the HP
XC Environment.
10.5.1 Useful Commands
The following describe useful commands for LSF-HPC Integrated with SLURM:
• Use the bjobs -l and bhist -l commands to see the components of the actual SLURM allocation
command.
• Use the bkill command to kill jobs.
• Use the bjobs command to monitor job status in LSF-HPC integrated with SLURM.
• Use the bqueues command to list the configured job queues in LSF-HPC integrated with SLURM.
10.5.2 Job Startup and Job Control
When LSF-HPC starts a SLURM job, it sets SLURM_JOBID to associate the job with the SLURM allocation.
While a job is running, all LSF-HPC supported operating-system-enforced resource limits are supported,
including core limit, CPU time limit, data limit, file size limit, memory limit, and stack limit. If the user
kills a job, LSF-HPC propagates signals to entire job, including the job file running on the local node and
all tasks running on remote nodes.
10.5.3 Preemption
LSF-HPC uses the SLURM "node share" feature to facilitate preemption. When a low-priority is job
preempted, job processes are suspended on allocated nodes, and LSF-HPC places the high-priority job on
the same node. After the high-priority job completes, LSF-HPC resumes suspended low-priority jobs.
10.5 Using LSF-HPC Integrated with SLURM in the HP XC Environment 87
- HP XC System Software 1
- User's Guide 1
- Table of Contents 3
- 4 Table of Contents 4
- Table of Contents 5 5
- 6 Table of Contents 6
- List of Figures 7
- List of Examples 11
- About This Document 13
- 14 About This Document 14
- 5 Related information 15
- 16 About This Document 16
- Linux Web Sites 17 17
- 6 Manpages 18
- 7 HP Encourages Your Comments 18
- 1.1 System Architecture 19
- 1.1.4 Node Specialization 20
- 1.1.5 Storage and I/O 21
- 1.1.6 File System 21
- 1.3 User Environment 23
- 1.5 Run-Time Environment 24
- 1.5.3 Standard LSF 25
- 1.5.5 HP-MPI 26
- 2 Using the System 27
- 2.2.1 Introduction 28
- 30 Using the System 30
- 3.1 Overview of Modules 31
- 3.2 Supplied Modulefiles 32
- 3.6 Loading a Modulefile 34
- 3.7 Unloading a Modulefile 34
- 3.9 Modulefile Conflicts 35
- 3.10 Creating a Modulefile 35
- 4 Developing Applications 37
- 4.4 Interrupting a Job 38
- 4.5 Setting Debugging Options 39
- 4.7.1.1 Modulefiles 40
- 4.7.1.2 HP-MPI 40
- 4.7.1.3 OpenMP 40
- 4.7.1.4 Pthreads 40
- 42 Developing Applications 42
- 4.8 Developing Libraries 43
- 44 Developing Applications 44
- 4.8 Developing Libraries 45 45
- 5 Submitting Jobs 47
- 48 Submitting Jobs 48
- 5.3 Submitting a Parallel Job 49
- 50 Submitting Jobs 50
- 52 Submitting Jobs 52
- 54 Submitting Jobs 54
- 56 Submitting Jobs 56
- 6 Debugging Applications 57
- 6.2.1.1 SSH and TotalView 58
- 6.2.1.2 Setting Up TotalView 58
- 60 Debugging Applications 60
- 6.2.1.8 Exiting TotalView 61
- 7 Monitoring Node Activity 63
- 64 Monitoring Node Activity 64
- 66 Monitoring Node Activity 66
- 68 Monitoring Node Activity 68
- 70 Monitoring Node Activity 70
- 8 Tuning Applications 73
- 74 Tuning Applications 74
- 8.2.1 Installation Kit 75
- Running a Program 76
- 9 Using SLURM 79
- 9.3.1.1 The srun Roles 80
- 9.3.1.2 The srun Modes 80
- 9.7 Job Accounting 81
- 9.9 Security 82
- 9.8 Fault Tolerance 82
- 10 Using LSF-HPC 83
- 84 Using LSF-HPC 84
- 10.4 Job Terminology 86
- 10.5.1 Useful Commands 87
- 10.5.3 Preemption 87
- 10.6 Submitting Jobs 88
- SLURM_JOBID=53 89
- SLURM_NPROCS=4 89
- 90 Using LSF-HPC 90
- 92 Using LSF-HPC 92
- 94 Using LSF-HPC 94
- 96 Using LSF-HPC 96
- 98 Using LSF-HPC 98
- 100 Using LSF-HPC 100
- 102 Using LSF-HPC 102
- 11 Advanced Topics 103
- 104 Advanced Topics 104
- 106 Advanced Topics 106
- 11.3.1 Example Procedure 1 107
- 11.3.3 Example Procedure 3 108
- 11.3.2 Example Procedure 2 108
- 11.5.1 Shared File View 109
- 11.5.2 Private File View 109
- 110 Advanced Topics 110
- A Examples 113
- Submit the job: 114
- View the job: 115
- 116 Examples 116
- Exit from the shell: 117
- Show the environment: 117
- Display the script: 118
- Run the job: 118
- Submit the job: 119 119
- View the finished jobs: 120
- View the node state: 120
- View the running job: 121
- View the finished job: 121
- 122 Examples 122
- Glossary 123
- 124 Glossary 124
- 126 Glossary 126
- 130 Index 130
- 132 Index 132
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