21 October 2010 Dietrich Liko Grid Tier-2 HEPHY Scientific Advisory Board

Computing Computing Group Leader: G. Walzel Group: S. Fichtinger, U. Kwapil, D. Liko, N. Hörmann, B. Wimmer Grid Effort: 2.5 FTE General Computing: 3 FTE 2Dietrich Liko21 October 2011

Computing Overview Status –CMS Operations –Other Activities Current issues –Operational Costs –EGI Membership New Developments –Austrian Center for Scientific Computing (ACSC) –Hosting at HPC Site of TU Vienna Summary 3Dietrich Liko21 October 2011

Computing Status of CMS Tier-2 Operation With the start of LHC physics operation, the grid has been challenged with the real use case – it was a success ! –The data could be transported out of CERN –The users could perform their analysis on the Tier-2 clusters 4Dietrich Liko21 October 2011 Week Up to 500 concurrent users On average jobs/day jobs/day

Computing Tier-2 in Vienna 5Dietrich Liko21 October 2011 Vienna is 2% of overall CMS Tier-2 capacity 450 CPU cores with Linux SLC5 –Average Tier-2 site About 3000 jobs/day Availability always close to 98 % –Among the best sites

Computing Datatransfers About 1 TB/day incoming and outgoing 300 TB Storage capacity 6Dietrich Liko21 October TB/day Spikes due to fast link to CERN Powercut

Computing Vienna CMS Center Commissioned and approved for computing shifts from Vienna First shifts have been done from Vienna 7Dietrich Liko21 October 2011 Open Day at LHC Startup Computing Shift

Computing Why is the Tier-2 important for CMS Vienna Group Contributes to the overall CMS Computing –2% of the CMS Tier-2 Capacity Part of the CMS SUSY Cluster –RWTH Aachen, Bari, London Imperial College, U Florida –We can influence how the common disk-space is used –We are a partner on the same level as our colleagues Our own specific analysis –Example: Development of OSET analysis required 40 TB of disk-space –A very visible contribution to CMS; without Tier-2 not possible Gives us resources we can control –In case of important findings and conferences –Competition between the institutes is severe All Vienna contributions to the physics publications profited from the Tier-2 resources 8Dietrich Liko21 October 2011

Computing Other activities: Theory group Collaboration with HEPHY Theory Group Scan of CP Violation parameters of a BSM Model – Two Higgs Doublet Could this model explain the Matter/Antimatter asymmetrie observed in the Universe ? Full scan would involve 122 Mill. points, actual scan ~1% 1 point uses ~9.5 h CPU time -> distributed jobs Publication in preparation 9Dietrich Liko21 October 2011 CP Violating effects have been found to be small

Computing Other activity: Radiobiology Collaboration with MedUni Vienna Study of Linear Energy Transfer of various Ions –Optimisation of cancer treatment at new radiation facilities More then 10 8 particles have to be simulated Submitted to Z Med Phys 10Dietrich Liko21 October 2011 Example of LET with different ions as simulated

Computing Current Issues Electricity costs charged to the Institute since 2010 –Significant load to our stretched budget –We are not able to operate all our equipment –In 2011 we will not operate at foreseen size –We have asked the Academy to retender our electricity contract; discussions are ongoing EGEE has been replaced by a new structure, the European Grid Initiative EGI –Other partners in grid computing left the field in Austria –No National Grid Initiative has been established –EGI membership fee is prohibitive for us (40 K Euro/year) –We are in discussion with EGI and CERN Current Hardware will take us until 2011/2012 –End of lifetime 11Dietrich Liko21 October 2011

Computing Regional WLCG Tier-2 Workshop Innsbruck, Vienna, Budapest, Debrezin About 30 participants Intense discussion on the future Requirements and plans for the next years were presented 12Dietrich Liko21 October 2011

Computing Future requirements CMS requirements will be growing over the years Belle II will require also computing Main Assumption: constant budget, 30% increase of capacity each year (given by Moore‘s law) 13Dietrich Liko21 October 2011

Computing Consolidations in the Austrian Computing Landscape Vienna Super Computer (VSC) –Univ., Univ. Of Technology, Boku Vienna Austrian Center for Scientific Computing (ACSC) –Univ. Innsbruck, Linz and Salzburg ACSC aims to be common framework –We joined ACSC as guests, aim for membership –Relation of VSC and ACSC has still to be clarified –I lead the Grid & Cloud Working Group 14Dietrich Liko21 October 2011

Computing Consolidation High Energy Physics requires somehow different setups then HPC –Large Data Storage –Collaboration with international partners (grid) Nevertheless many common aspects –We aim to integrate our Tier-2 in a larger HPC Center We are looking for partners –Stefan Maier Institiute: PANDA Experiment at the FAIR Collider –Others might be possible Specific funding for particle physics computing will be required 15Dietrich Liko21 October 2011

Computing Hosting at the VSC We have discussed a hosting scenario with the VSC group from the Technical University Place, Energy, Networking, Cooling would be available –5 racks –Up to 50 kW Power –10 Gbit Network (2 to 3 Gbit sustained) With new hardware we could move there by 2012 –The open issue is the funding 16Dietrich Liko21 October 2011

Computing Summary Tier-2 is operational and allows us to participate in the analysis of data –Important for our physics analysis –Important for our position in the CMS collaboration Electricity costs prohibitive to operate Tier-2 at available size We need a new solution for 2012, when the hardware gets obsolete We study the issue in the context of the ACSC VSC could be an ideal place to host a particle physics cluster 17Dietrich Liko21 October 2011