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# High Performance Computing clusters at INFN-CNAF
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An HPC cluster dedicated to CERN studies is available at INFN-CNAF (Bologna, Italy) allowing for MPI applications across multiple nodes.
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The cluster presently features a total of about 800 CPU-cores.

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## Access
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Access to the cluster can be requested by sending an email to abp.computing[AT]cern.ch including the following information:
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 - The filled in <a href="https://www.cnaf.infn.it/wp-content/uploads/2015/09/accesso-cnaf-EN.pdf" target="_blank">form</a>. Please add Daniele Cesini as contact person and "Access to the hpc_acc Cluster to run High Energy Physics simulation codes" as the reason.
 - A copy of identity card or other valid identification document (e.g. passport).

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## Usage
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 - Users should connect via ssh to **bastion.cnaf.infn.it** and from there access the cluster front-end called **ui-hpc2.cr.cnaf.infn.it**.
 - The LSF system is installed on the cluster to manage job submissions. Jobs should be submitted to the ”hpc-acc” queue.
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 - If you have inquiries about running your jobs on this cluster or need technical support, please write an email to <a href="mailto:hpc-support@listsNOSPAMPLEASE.cnaf.infn.it">hpc-support@listsNOSPAMPLEASE.cnaf.infn.it</a>
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 - A node called **hpc-201-11-35** is equipped with four V100 **GPUs**, and can be used interactively.
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## Other links
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__Relevant links__ to obtain further information on this cluster are:

 <ul><li> Presentation by Antonio Falabella at <a href="https://indico.cern.ch/event/647418/" target="_blank">ABP-CWG meeting on 20 July, 2017</a> 
</li> <li> Presentation by Annalisa Romano on how to submit jobs at <a href="https://indico.cern.ch/event/647301/" target="_blank">ABP-CWG meeting on 4 July 2017</a>
</li> <li> Note on outcome of the acceptance test to proceed to the second phase of the cluster procurement and installation: <em>Performance of space charge simulations using High Performance Computing (HPC) cluster</em> <a href="https://cds.cern.ch/record/2276464" target="_blank">CERN-ACC-NOTE-2017-0048</a>
</li></ul>

 
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## Support
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* Please note that Antonio Falabella ([antonio.falabella@cnafNOSPAMPLEASE.infn.it](mailto:antonio.falabella@cnafNOSPAMPLEASE.infn.it)) is available to assist you, should you encounter any problem in connecting or running your jobs in the present configuration.