IAC: Difference between revisions
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go back to [[Main Page]], [[Computational Resources]], [[Clusters]], [[External Resources]] | |||
IAC stands for "Instituto de Astrofísica de Canarias" and hosts the LaPalma supercomputer. | IAC stands for "Instituto de Astrofísica de Canarias" and hosts the LaPalma supercomputer. | ||
LaPalma comprises 256 JS20 compute nodes (blades) and 4 p510 servers. Every blade has two processors at | LaPalma comprises 256 JS20 compute nodes (blades) and 4 p510 servers. Every blade has two processors at | ||
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== User details == | == User details == | ||
The scratch directory to use is /scratch/usergroup/username (/gpfs/scratch/usergroup/username is available but jobs will run slower) | |||
usergroup is usually the first six characters of your username. | |||
This can be easily checked by ls'ing the /scratch directory | |||
== Queues == | == Queues == | ||
"[https://computing.llnl.gov/linux/slurm/ Slurm]+ [http://www.clusterresources.com/pages/products/moab-cluster-suite.php MOAB]" (essential information collected from the User's Guide) | "[https://computing.llnl.gov/linux/slurm/ Slurm] + [http://www.clusterresources.com/pages/products/moab-cluster-suite.php MOAB]" (essential information collected from the User's Guide) | ||
% '''mnsubmit <job_script>''' | % '''mnsubmit <job_script>''' | ||
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shows information about the estimated time for the specified job to be executed. | shows information about the estimated time for the specified job to be executed. | ||
== | == Available Programs == | ||
[http://aliga.iciq.es/wiki/index.php/NWCHEM NWChem] | [http://aliga.iciq.es/wiki/index.php/NWCHEM NWChem] | ||
[http://aliga.iciq.es/wiki/index.php/DL_POLY_2 DLPOLY 2] | [http://aliga.iciq.es/wiki/index.php/DL_POLY_2 DLPOLY 2] | ||
== Submission script == | == Submission script == | ||
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# @ wall_clock_limit = 12:00:00 | # @ wall_clock_limit = 12:00:00 | ||
srun /gpfs/apps/NWCHEM | srun /gpfs/apps/NWCHEM/bin/LINUX64_POWERPC/nwchem job.nw >& job.out | ||
== Links == | == Links == | ||
[http://http://www.iac.es/index.php?lang=en IAC Website] | [http://http://www.iac.es/index.php?lang=en IAC Website] | ||
[http://www.clusterresources.com/products/mwm/docs/a.gcommandoverview.shtml Moab Commands Overview] | |||
Latest revision as of 10:21, 12 June 2009
go back to Main Page, Computational Resources, Clusters, External Resources
IAC stands for "Instituto de Astrofísica de Canarias" and hosts the LaPalma supercomputer.
LaPalma comprises 256 JS20 compute nodes (blades) and 4 p510 servers. Every blade has two processors at
2.2 GHz running Linux operating system with 4 GB of memory RAM and 40 GB local disk storage. All the
servers provide a total of 14 TB of disk storage accessible from every blade through GPFS (Global Parallel
File System).
The networks that interconnect the LaPalma are:
- Myrinet Network: High bandwidth network used by parallel applications communications.
- Gigabit Network: Ethernet network used by the blades to mount remotely their root file system from the servers and the network over which GPFS works.
Access[edit]
There are 3 login blades:
ssh username@lapalma1.iac.es
ssh username@lapalma2.iac.es
ssh username@lapalma3.iac.es
User details[edit]
The scratch directory to use is /scratch/usergroup/username (/gpfs/scratch/usergroup/username is available but jobs will run slower)
usergroup is usually the first six characters of your username. This can be easily checked by ls'ing the /scratch directory
Queues[edit]
"Slurm + MOAB" (essential information collected from the User's Guide)
% mnsubmit <job_script>
submits a “job script” to the queue system (see below a script example).
% mnq
shows all the jobs submitted.
% mncancel <job_id>
remove his/her job from the queue system, canceling the execution of the processes, if they were already running.
% checkjob <job_id>
obtains detailed information about a specific job, including the assigned nodes and the possible reasons preventing the job from running.
% mnstart <job_id>
shows information about the estimated time for the specified job to be executed.
Available Programs[edit]
Submission script[edit]
#!/bin/bash # @ job_name = job # @ initialdir = . # @ output = OUTPUT/mpi_%j.out # @ error = OUTPUT/mpi_%j.err # @ total_tasks = 64 # @ wall_clock_limit = 12:00:00 srun /gpfs/apps/NWCHEM/bin/LINUX64_POWERPC/nwchem job.nw >& job.out