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HP XC System 2.x Software 6.5 Monitoring Jobs with the squeue Command, 6.4.8 srun Environment Variables, 6.4.9 Using srun with HP-MPI, 6.4.10 Using srun with LSF

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6.4.8 srun Environment Variables

Many srun options have corresponding environment variables. An srun option, if invoked, always overrides (resets) the corresponding environment variable (which contains each job feature’s default value, if there is a default).

In addition, srun sets the following environment variables for each executing task on the remote compute nodes:

SLURM_JOBID	Specifies the job ID of the executing job.
SLURM_NODEID	Specifies the relative node ID of the current node.
SLURM_NODELIST	Specifies the list of nodes on which the job is actually running.
SLURM_NPROCS	Specifies the total number of processes in the job.
SLURM_PROCID	Specifies the MPI rank (or relative process ID) for the current
	process.

Other environment variables important for srun — managed jobs include:

MAX_TASKS_PER_NODE	Provides an upper bound on the number of tasks that
	srun assigns to each job node, even if you allow
	more than one process per CPU by invoking the srun
	-Ooption.
SLURM_NNODES	Is the actual number of nodes assigned to run your
	job (which may exceed the number of nodes that you
	explicitly requested with the srun -Noption).

6.4.9 Using srun with HP-MPI

The srun command can be used as an option in an HP-MPI launch command. Refer to Section 8.3.3 for information about using srun with HP-MPI.

6.4.10 Using srun with LSF

The srun command can be used in an LSF launch command. Refer to Chapter 7 for information about using srun with LSF.

6.5 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 6-2reports on job 12345 and job 12346:

Example 6-2: 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

6-12Using SLURM

Contents

Page Page Contents About This Document 1 Overview of the User Environment 2 Using the System 3 Developing Applications Debugging Applications Tuning Applications Using SLURM 7 Using LSF 8 Using HP-MPI 9 Using HP MLIB Advanced Topics Examples Glossary Index Figures Tables Page About This Document Intended Audience Document Organization HP XC Information For More Information Supplementary Information Manpages Related Information Typographical Conventions HP Encourages Your Comments Page Overview of the User Environment 1.1System Architecture 1.1.1 Operating System 1.1.2 Node Specialization 1.1.3 Storage and I/O 1.1.4 File System 1.1.5 System Interconnect Network 1.1.6Network Address Translation (NAT) 1.2 User Environment 1.2.1 LVS 1.2.2 Modules 1.2.3 Commands 1.3 Application Development Environment 1.3.1 Parallel Applications 1.3.2 Serial Applications 1.4 Run-TimeEnvironment 1.4.1 SLURM 1.4.2 Load Sharing Facility (LSF-HPC) 1.4.3 How LSF-HPCand SLURM Interact 1.4.4 HP-MPI 1.5Components, Tools, Compilers, Libraries, and Debuggers Page Using the System 2.1Logging in to the System 2.1.1 LVS Login Routing 2.1.2 Using ssh to Log In 2.2 Configuring Your Environment with Modulefiles 2.2.1 Notes on Modulefiles 2.2.2 Supplied Modulefiles 2.2.3 Modulefiles Automatically Loaded on the System 2.2.4 Viewing Available Modulefiles 2.2.5 Viewing Loaded Modulefiles 2.2.6 Loading a Modulefile 2.2.7 Unloading a Modulefile 2.2.8Modulefile Conflicts 2.2.9 Creating a Modulefile 2.2.10 Viewing Modulefile-SpecificHelp 2.3 Launching and Managing Jobs Quick Start 2.3.1 Introduction 2.3.2 Getting Information About Queues 2.3.3 Getting Information About Resources 2.3.4Getting Information About the System’s Partitions 2.3.5 Launching Jobs 2.3.5.2 Submitting a Non-MPIParallel Job Example 2-2:Submitting a Non-MPIParallel Job Using SLURM Options with the LSF External Scheduler Example 2-3:Submitting a Non-MPIParallel Job to Run One Task per Node 2.3.5.3 Submitting an MPI Job Using SLURM Options in MPI Jobs with the LSF External Scheduler Example 2-4:Running an MPI Job with LSF Example 2-5:Running an MPI Job with LSF Using the External Scheduler Option 2.3.5.4 Submitting a Batch Job or Job Script Example 2-6:Submitting a Job Script 2.3.6 Getting Information About Your Jobs 2.3.7 Stopping and Suspending Jobs 2.3.8Resuming Suspended Jobs 2.4 Performing Other Common User Tasks 2.4.1 Determining the LSF Cluster Name and LSF Execution Host 2.4.2 Installing Third-PartySoftware 2.5 Getting System Help and Information Page Page Developing Applications 3.1Overview 3.2 Using Compilers 3.2.1 Standard Linux Compilers 3.2.2 Intel Compilers 3.2.3PGI Compilers 3.2.4 Pathscale Compilers 3.3 Checking Nodes and Partitions Before Running Jobs 3.4 Interrupting a Job 3.5 Setting Debugging Options 3.6 Developing Serial Applications 3.6.1Serial Application Build Environment 3.7 Developing Parallel Applications 3.7.1Parallel Application Build Environment 3.7.1.5 Quadrics SHMEM 3.7.1.6 MLIB Math Library 3.7.1.7 MPI Library 3.7.1.8 Intel Fortran and C/C++Compilers 3.7.1.9 PGI Fortran and C/C++ Compilers 3.7.1.10 GNU C and C++ Compilers 3.7.1.11 GNU Parallel Make 3.7.1.12 MKL Library 3.7.2 Building Parallel Applications 3.8 Developing Libraries 3.8.1 Designing Libraries for XC4000 3.9 Advanced Topics 3.9.1 Using the GNU Parallel Make Capability http://www.llnl.gov/asci/applications/SMG98README.html 3.9.1.1 Example Procedure 3.9.1.2 Example Procedure 3.9.1.3 Example Procedure 3.9.2 Local Disks on Compute Nodes 3.9.3 I/O Performance Considerations 3.9.4 Communication Between Nodes Page Debugging Applications 4.1 Debugging Serial Applications 4.2 Debugging Parallel Applications 4.2.1 Debugging with TotalView ______________________ Note: 4.2.1.3Using TotalView with SLURM 4.2.1.4 Using TotalView with LSF-HPC 4.2.1.5 Starting TotalView for the First Time Figure 4-1:TotalView Root Window Figure 4-2:TotalView Preferences Window Page Page 4.2.1.6 Debugging an Application Figure 4-3:TotalView Process Window Example 4.2.1.7 Debugging Running Applications Figure 4-4:Unattached Window Figure 4-5:Attached Window 4.2.1.8Exiting TotalView Page Tuning Applications 5.1 Using the Intel Trace Collector/Analyzer 5.1.1Building a Program — Intel Trace Collector and HP-MPI 5.1.2 Running a Program — Intel Trace Collector and HP-MPI 5.1.3 Visualizing Data — Intel Trace Analyzer and HP-MPI Using SLURM 6.1 Introduction 6.2 SLURM Commands 6.3 Accessing the SLURM Manpages 6.4 Launching Jobs with the srun Command 6.4.1The srun Roles and Modes 6.4.1.1 srun Roles 6.4.1.2srun Modes modes 6.4.2 srun Signal Handling 6.4.3srun Run-ModeOptions 6.4.4 srun Resource-AllocationOptions -ccpt (--cpus-per-task=cpt) -ppart (--partition=part) -tminutes (--time=minutes) -Tnthreads (--threads=nthreads) 6.4.5 srun Control Options 6.4.6 srun I/O Options -omode (--output=mode) -imode (--input=mode) -emode (--error=mode) -l (--label) -u (--unbuffered) 6.4.7 srun Constraint Options --contiguous=yes|no --mem=size --mincpus=n --vmem=size --tmp=size 6.5 Monitoring Jobs with the squeue Command 6.6 Killing Jobs with the scancel Command 6.7 Getting System Information with the sinfo Command 6.8 Job Accounting 6.9 Fault Tolerance 6.10 Security Using LSF 7.1 Introduction to LSF in the HP XC Environment 7.1.1 Overview of LSF 7.1.2 Topology Support 7.1.3 Notes on LSF-HPC 7.1.4How LSF and SLURM Launch and Manage a Job User 7.1.5 Differences Between LSF on HP XC and Standard LSF 7.1.6Notes About Using LSF in the HP XC Environment 7.2 Determining Execution Host 7.3 Determining Available System Resources 7.3.1 Getting Status of LSF 7.3.2Getting Information About LSF-HPCExecution Host Node 7.3.3Getting Host Load Information 7.3.4 Checking LSF System Queues 7.3.5 Getting Information About the lsf Partition 7.4 Submitting Jobs 7.4.1 Summary of the LSF bsub Command Format 7.4.2 LSF-SLURMExternal Scheduler Page 7.4.3 Submitting a Serial Job 7.4.4 Submitting a Job in Parallel 7.4.5 Submitting an HP-MPIJob 7.4.6 Submitting a Batch Job or Job Script 7.4.6.1 Examples Example 7-8:Submitting a Batch Job Script Example 7-9:Submitting a Batch Script with a Specific Topologic Request Example 7-10:Submitting a Batch Job Script that uses a Subset of the Allocation 7.4.7 Submitting a Job from a Non-HPXC Host 7.5 Getting Information About Jobs 7.5.1 Getting Job Allocation Information 7.5.2 Checking Status of a Job 7.5.3 Viewing a Job’s Historical Information 7.6 Working Interactively Within an LSF-HPCAllocation 7.6.1 Submitting an Interactive Job to Launch the xterm Program Example 7-17:View Your Environment Example 7-18:View Your Allocation in SLURM Example 7-19:View Your Running Job in LSF Example 7-20:View Job Details in LSF 7.6.2 Submitting an Interactive Job to Launch a Shell 7.7 LSF Equivalents of SLURM srun Options Table 7-2:LSF Equivalents of SLURM srun Options (cont.) Page Page Using HP-MPI 8.1Overview 8.2 HP-MPIDirectory Structure 8.3 Compiling and Running Applications 8.3.1 Setting Environment Variables 8.3.2 Building and Running an Example Application 8.3.2.1 Example Application hello_world 8.3.2.2 Building and Running hello_world 8.3.3 Using srun with HP-MPI 8.3.3.2Creating Subshells and Launching Jobsteps 8.3.3.3System Interconnect Selection 8.3.4 Using LSF and HP-MPI 8.3.5 MPI Versioning 8.4 System Interconnect Support 8.4.1HP-MPIPerformance on HP XC with Multiple System Interconnects 8.4.2 Global Environment Variable Settings on the mpirun Command Line 8.5 32-BitBuilds on XC4000 8.6 Truncated Messages 8.7Allowing Windows to Use Exclusive Locks 8.8 The mpirun Command Options 8.9 Environment Variables 8.9.1 MPIRUN_OPTIONS 8.9.2MPIRUN_SYSTEM_OPTIONS 8.9.3 MPI_IC_ORDER 8.9.4MPI_PHYSICAL_MEMORY 8.9.5 MPI_PIN_PERCENTAGE 8.9.6 MPI_PAGE_ALIGN_MEM 8.9.7 MPI_MAX_WINDOW 8.9.8MPI_ELANLOCK 8.9.9MPI_USE_LIBELAN 8.10MPICH Object Compatibility 8.11 HP-MPIDocumentation and Manpages 8.12Additional Information, Known Problems, and Work-arounds Using HP MLIB 9.1 Overview 9.1.1 Intel Compiler Notes 9.1.2 MLIB and Module Files 9.2 HP MLIB for the HP XC6000 Platform 9.2.1 Platform Support 9.2.2 Library Support 9.2.3 MPI Parallelism 9.2.4 Modulefiles and MLIB 9.2.5 Using Intel Compilers with HP MLIB 9.2.6 Compiling and Linking 9.2.7 Licensing 9.2.8 MLIB Manpages 9.3 HP MLIB for the HP XC4000 Platform 9.3.1 Platform Support 9.3.2 Library Support 9.3.3 MPI Parallelism 9.3.4 Modulefiles and MLIB 9.3.5 Compiling and Linking 9.3.6 Licensing 9.3.7 MLIB Manpages Advanced Topics 10.1Enabling Remote Execution with OpenSSH 10.2 Running an X Terminal Session from a Remote Node Step 2. Logging in to HP XC System Step 3. Running an X terminal Session Using SLURM Step 4. Running an X terminal Session Using LSF Page Examples A.1 Building and Running a Serial Application A.2 Launching a Serial Interactive Shell Through LSF A.3 Running LSF Jobs with a SLURM Allocation Request A.3.1 Example 1. Two Processors on Any Two Nodes A.3.2 Example 2. Four Processors on Two Specific Nodes A.4 Launching a Parallel Interactive Shell Through LSF Note the output from the bjobs command: Check the running job’s information: A.5 Submitting a Simple Job Script with LSF A.6 Submitting an Interactive Job with LSF A.7 Submitting an HP-MPIJob with LSF View the running job: View the finished job: A.8 Using a Resource Requirements String in an LSF Command Page Glossary extensible firmware interface external network node fairshare FCFS first come first served image server Integrated Lights Out interconnect Internet address I/O node LSF master host LVS Management Processor master host module parallel application PXE resource manager role role Root Administration Switch Page Index