An attempt to summarize…or … some highly subjective observations Matthias Kasemann, CERN & DESY

9/7/07M.Kasemann: An attempt to summarize CHEP 072/31 Topics I want to present here…. This is NOT a summary of the summaries This are my observations (including my miss understandings and errors) CHEP07: the Conference Topics presented in plenary sessions here: Computing issues at our Laboratories3 x Computing Technology & Evolution 4 x Computing for HEP5 x Grid Projects: Status and Developments5 x Networking2 x Some Conference impressions…

9/7/07M.Kasemann: An attempt to summarize CHEP 073/31 Total: Expected Audience: - attract 500 people - 90% from outside of Canada - 50% from US - Many from T1 and T2 centers CHEP07: The Conference

9/7/07M.Kasemann: An attempt to summarize CHEP 074/31 CHEP07: Some Statistics 429 abstracts submitted with 1208 Authors

9/7/07M.Kasemann: An attempt to summarize CHEP 075/31 Computing at Laboratories Infrastructure provisioning:

9/7/07M.Kasemann: An attempt to summarize CHEP 076/31

9/7/07M.Kasemann: An attempt to summarize CHEP 077/31 Computing technology evolution We heard an inspiring presentation by Eng Lim Goh from SGI: … one fully digitized film is 4 PB and 1.25 GB/s to play…

9/7/07M.Kasemann: An attempt to summarize CHEP 078/31 Computing technology evolution James Sexton / IBM “The few next years of computing is all about fundamental physical limits”

9/7/07M.Kasemann: An attempt to summarize CHEP 079/31 Computing technology evolution “HEP applications are embarrassingly parallel - as long as there is enough memory for the application”

9/7/07M.Kasemann: An attempt to summarize CHEP 0710/31 S.Jarp: LHC Software and CPU architectures “We have floating point work wrapped in ‘if/else’ logic” Overall estimate: 50% is floating point “our LHC programs typically utilizes only 1 instruction per CPU clock cycle (= 1/8 of maximum)” “We are not getting out of first gear” Recommendations: 1. get ready for LHC 2. increase Instruction Level Parallelism Assist compiler to make it more effective 3. improve Multithreading possibilities of applications 4. simplify / restructure code

9/7/07M.Kasemann: An attempt to summarize CHEP 0711/31 S.Jarp: LHC Software and CPU architectures (2)

9/7/07M.Kasemann: An attempt to summarize CHEP 0712/31 The LHC & The Experiments T.Virdee Many of us work in software and computing aspects to do a physics experiment. T.Virdee started with physics ….

9/7/07M.Kasemann: An attempt to summarize CHEP 0713/31 The LHC & The Experiments T.Virdee … reminded us of the schedule … Some scary pictures:

9/7/07M.Kasemann: An attempt to summarize CHEP 0714/31 The LHC & The Experiments T.Virdee … and concluded: I like to add: … if we manage to analyze the data (which we will … in one way or the other)

9/7/07M.Kasemann: An attempt to summarize CHEP 0715/31 LHC Computing I.Fisk “In the beginning computing was centralized” - no longer

9/7/07M.Kasemann: An attempt to summarize CHEP 0716/31 LHC Computing: work ahead of us

9/7/07M.Kasemann: An attempt to summarize CHEP 0717/31 Analysis Tools for LHC D.Liko

9/7/07M.Kasemann: An attempt to summarize CHEP 0718/31 DAQ for LHC Experiments S.Chapeland

9/7/07M.Kasemann: An attempt to summarize CHEP 0719/31 Running Experiments using the Grid F.Wuerthwein

9/7/07M.Kasemann: An attempt to summarize CHEP 0720/31 Advanced Computation for the ILC P.Tennenbaum

9/7/07M.Kasemann: An attempt to summarize CHEP 0721/31 WLCG: Status & Challenges Les Robertson

9/7/07M.Kasemann: An attempt to summarize CHEP 0722/31 WLCG: work ahead of us, concerns

9/7/07M.Kasemann: An attempt to summarize CHEP 0723/31 WLCG Workshop Summary J.Shiers

9/7/07M.Kasemann: An attempt to summarize CHEP 0724/31 Grid Interoperability L.Field ç

9/7/07M.Kasemann: An attempt to summarize CHEP 0725/31 Grid Interoperability L.Field I might add: This work is key to collaborate and succeed in distributed computing

9/7/07M.Kasemann: An attempt to summarize CHEP 0726/31 The Future of Grid Computing M.Livny A great talk, here are my notes: Grid computing is no more... - an easy source of money - a tool to get the troupes mobilized - an easy sell of software tools - an easy way to get papers published or press releases posted Distributed Computing is here to stay... and is doing well LHC came up with the Tier architecture well before Grid computing was founded Claims of benefits provided by distributed computing systems: - high availability + reliability - high system performance - ease of modular and incremental growth - automatic load + resource sharing - good response to Temporary overload - easy expansion in capacity and/or function

9/7/07M.Kasemann: An attempt to summarize CHEP 0727/31 The Future of Grid Computing M.Livny … and some more notes: All the component of the system should be unified in their desire to achieve a common goal. This goal will determine the rules according to which each of these elements will be controlled. - in contradiction to a top down organization When we focus on fundamentals we can deliver stable distributed computing capabilities Our software stack is a misch-masch, not for technical reasons software sources with different quality assurance procedures Where are we heading? - we have to improve our software quality - we have to restructure our organization - we must add capabilities: -- storage management -- heterogeneous security model -- intra VO scheduling via "just in time" overlay frameworks

9/7/07M.Kasemann: An attempt to summarize CHEP 0728/31 Networks for HEP and Data Intensive Science and the Digital Divide H.Newman

9/7/07M.Kasemann: An attempt to summarize CHEP 0729/31 Networks for HEP and Data Intensive Science and the Digital Divide H.Newman

9/7/07M.Kasemann: An attempt to summarize CHEP 0730/31 CHEP Impressions

9/7/07M.Kasemann: An attempt to summarize CHEP 0731/31 Thank you… …for a very well organized conference … for interesting presentations and discussions by all of you not to forget the progress made through many discussions and working sessions in the hallways and corridors