This work is supported by projects Research infrastructure CERN (CERN-CZ, LM2015058) and OP RDE CERN Computing (CZ.02.1.01/0.0/0.0/1 6013/0001404) from.

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This work is supported by projects Research infrastructure CERN (CERN-CZ, LM2015058) and OP RDE CERN Computing (CZ.02.1.01/0.0/0.0/1 6013/0001404) from EU funds and MEYS.

ATLAS Computing at Czech HPC Center IT4I Jiří Chudoba, Michal Svatoš 2. 2. 2018 Institute of Physics (FZU) of the Czech Academy of Sciences

IT4I IT4I – IT4Innovations Czech National Supercomputing Center located in Ostrava (300 km from Prague) Founded in 2011, first cluster in 2013 Initial funds mostly from EU Operational Programme Research and Development for Innovations, 1.8 billion CZK (80 MCHF) Mission: to deliver scientifically excellent and industry relevant research in the fields of high performance computing and embedded systems 2. 2. 2018 chudoba@fzu.cz

Cluster Anselm Delivered in 2013 94 TFLOPs 209 compute nodes 180 nodes without acc. 16 cores per node (2x Intel Xeon E5-2665) 64 GB RAM bullx Linux Server release 6.3 PBSPro Lustre FS for shared HOME and SCRATCH Infiniband QDR and Gigabit Ethernet Access via login nodes 2. 2. 2018 chudoba@fzu.cz

Cluster Salomon - 2015 2 PFLOPs peak perf – nr. 87 in 2017/11 1008 compute nodes 576 no accelerators 432 with Intel Xeon Phi MIC 24 cores per node (2x Intel Xeon E5-2680v3 ) 128 GB RAM (or more) CentOS 6.9 PBSPro 13 Lustre FS for shared HOME and SCRATCH Infiniband (56 Gbps) Access via login nodes, port forwarding allowed 2. 2. 2018 chudoba@fzu.cz

ATLAS jobs on Anselm Solution similar to TITAN Needs some changes for a different environment Work in progress 2. 2. 2018 chudoba@fzu.cz

ATLAS jobs on Salomon Sw installed by rsync with the site CVMFS A special Panda queue on praguelcg2 (CZ Tier2 site) ARC CE (arc-it4i) accepts jobs from Panda downloads input files to sshfs mounted SCRATCH on Salamon submits jobs via login node uploads log and output files from SCRATCH Solution based on ARC CE was introduced to ATLAS first for SuperMUC and CSC. Many thanks to Rod Walker, Gianfranco Sciacca, Jaroslava Schovancova (test jobs), David Cameron, Petr Vokac, Emmanoile Vamvakopoulos 2. 2. 2018 chudoba@fzu.cz

Jobs at Salomon Limit 100 from qfree 2. 2. 2018 chudoba@fzu.cz

CZ-Tier2 vs Salomon: Running jobs 2. 2. 2018 chudoba@fzu.cz

CZ-Tier2 vs Salomon: Running job slots 2. 2. 2018 chudoba@fzu.cz

CZ-Tier2 vs Salomon: Completed jobs Completed = successful + failed 2. 2. 2018 chudoba@fzu.cz

CZ-Tier2 vs Salomon: Njobs Job failures at Salomon on 12.1.-14.1. caused by jobs from release which was incomplete at the scratchdisk Other failures: boost::filesystem::status: Permission denied:"/var/spool/PBS/mom_priv/hooks/resourcedef" reason why some jobs need it is under investigation 2. 2. 2018 chudoba@fzu.cz

CZ-Tier2 vs Salomon: Wallclock usage 2. 2. 2018 chudoba@fzu.cz

CZ-Tier2 vs Salomon: Efficiency 2. 2. 2018 chudoba@fzu.cz

CZ-Tier2 vs Salomon: Processed events 2. 2. 2018 chudoba@fzu.cz

CZ-Tier2 vs Salomon: Input Size 2. 2. 2018 chudoba@fzu.cz

CZ-Tier2 vs Salomon: Output Size 2. 2. 2018 chudoba@fzu.cz

Conclusion HPC resources can significantly contribute to the CZ Tier-2 computing capacity We greatly appreciate the possibility to use IT4I resources and very good support from IT4I team. 2. 2. 2018 chudoba@fzu.cz

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