# High Performance Computing clusters at INFN-CNAF
An __HPC cluster dedicated to CERN studies__ is available at INFN-CNAF (Bologna, Italy) allowing for MPI applications across multiple nodes.
The cluster presently features a total of about 800 CPU-cores.
## Access
Access to the cluster can be requested by sending an email to abp.computing[AT]cern.ch including the following information:
- The filled in <ahref="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).
## Usage
- 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.
- 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>
## Other links
__Relevant links__ to obtain further information on this cluster are:
<ul><li> Presentation by Antonio Falabella at <ahref="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 <ahref="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><ahref="https://cds.cern.ch/record/2276464"target="_blank">CERN-ACC-NOTE-2017-0048</a>
</li></ul>
## Support
* 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.