1 March 8-9, 2011 Soonwook Hwang KISTI FKPPL VO: Status and Perspectives of Grid Infrastructure The 3 rd FKPPL KIAS

Introduction to FKPPL  FKPPL (France-Korea Particle Physics Laboratory)  International Associated Laboratory between French and Korean laboratories  Promote joint cooperative activities (research projects) under a scientific research program in the area of  Particle Physics  LHC  ILC  e-Science  Bioinformatics  Grid Computing  Geant4

 FKPPL focuses on particle physics and e-science Both require international collaboration Project nameCoordinatorsPartners ILC calorimeter (particle physics) Jongseo Chai, SKKU C de LA TAILLE, OMEGA-LAL Sung Kyun Kwan Univ., Korea Institute of Radiological and medical Sciencces, Pohang Accel. Lab. OMEGA-LAL, LLR ILC electronics (particle physics) Jongseo Chai, SKKU Christoph de la Taille, LAL Sung Kyun Kwan Univ., Korea Institute of Radiological and medical Sciencces, Pohang Accel. Lab. LAL, LLR Grid computingS. Hwang, KISTI D. Boutigny, CC-IN2P3 KISTI, CC-IN2P3 WISDOM (insilico drug discovery) Doman Kim, CNU V. Breton, LPC Chonnam Nat. Univ., KISTI, Kangnung Nat. Univ., LPC ALICE ( heavy ions physics) Yongwook Baek, KNU Pascal Dupieux, LPC Kangnung Nat. Univ. LPC CDF (particle physics) Kihyeon Cho, KISTI Aurore Savoy-Navarro, LPNHE KISTI, LPNHE CREAM (Astroparticle Physics) Yong-Yeon Keum, Ewha Pierre SALATI, LAPTH Ewha Womans Univ. LAPTH Geant4 (Medical Physics) Se Byeong Lee, NCC Sebastien Incert, IN2P3-CENBG NCC, IN2P3-CENBG, IN2P3-LPC FKPPL scientific projects FKPPL Scientific Projects

Grid FKPPL  Participating Organizations  CC-IN2P3 and KISTI  Group Leaders  Dominique Boutigny, Director of CC-IN2P3, France  Soonwook Hwang, KISTI, Korea  ’10 Budget  France: ~6000 Euro  Mainly traveling cost funded by CNRS  Korea: 20,000,000 Won  traveling cost and organizing grid workshop and training  funded by KRCF under the framework of the CNRS-KRCFST Joint Programme  Common Interest  Joint in Grid computing  Collaboration on ALICE computing: CC-IN2P3 (Tier1) and KISTI (Tier2)  Joint operation and maintenance of production grid infrastructure

Objective  Background  Collaborative work between KISTI in Korea and CC-IN2P3 in France in the area of Grid computing  Objective  Provide computing facilities and user support needed to foster the scientific applications established under the framework of FKPPL collaboration and beyond  Promote the adoption of grid technology and grid awareness in Korea and France by providing scientists and researchers with production Grid infrastructure and technical support necessary for them

FKPPL VO Grid  Built based on the gLite middleware services  Has been up and running since October 2008, providing ~10,000 CPU cores and ~30 TBytes of disk storage  Since last December, KEK has joined FKPPL VO, contributing ~1,600 CPU cores and 27 Tbytes of Disks VOMS WMS CESEUICESE FKPPL VO LFC WIKI CE WMS SE

FKPPL VO Grid Testbed ServiceHostSite UIkenobi.kisti.re.krKISTI ncc-ui.ncc.re.krNCC VOMSpalpatine.kisti.re.krKISTI WMS/LBsnow.kisti.re.kr, snow02, snow03(LB)KISTI kek2-wms.cc.kek.jpKEK SEccsrm02.in2p3.fr (0.5TB)CC-IN2P3 kek2-se.cc.kek.jp (26.6TB)KEK hansolo.kisti.re.kr(3TB)KISTI CECclcgceli01[3].in2p3.fr (8000 CPU cores)CC-IN2P3 Kek2-ce01[5|6].cc.kek.jp (1600 CPU cores)KEK darthvader.kisti.re.kr (128 CPU cores)KISTI VOMS WMS CESEUICESE FKPPL VO KISTI IN2P3 LFC WIKI WMS SE KEK CE

gLite Grid Services on FKPPL VO User Interface (UI) User Interface (UI): The place where users logon to access the Grid Workload Management System (WMS) Workload Management System (WMS): Matches the user requirements with the available resources on the Grid File and replica catalog File and replica catalog: Location of grid files and grid file replicas Computing Element (CE) Computing Element (CE): A batch queue on a site’s computers where the user’s job is executed Storage Element (SE) Storage Element (SE): provides (large-scale) storage for files

9 Computing Element Storage Element IN2P3 Information System Submit job (executable + small inputs) Submit job query Retrieve output WMS User Interface publish state File and Replica Catalog VO Management Service (DB of VO users) query create proxy process Retrieve status & (small) output files Logging and bookkeeping Job status Logging Input file(s) Output file(s) Register file Job Submission Example

Resource and Service CC-IN2P3  CPU Used  ~5.1 millions of hours HS06  Number of Jobs executed  193,434  72 years for 1 processor intel Xenon 2.5 GHz

Number of Jobs

Cumulative CPU usage

User Support  FKPPL VO Wiki site   User Accounts on UI  104 User accounts has been created  FKPPL VO Membership Registration  70 Users have been registered at FKPPL VO membership

Grid Training (1/2)  In February 2010, we organized Geant4 and Grid tutorial 2010 for Korean medical physics communities  Co-hosted by KISTI and NCC  About 34 participants from major hospitals in Korea  About 20 new users joined the FKPPL VO membership

Grid Training (2/2)  “2010 Summer Training Course on Geant4, GATE and Grid computing” held in Seoul in July  Co-hosted by KISTI and NCC  About 50 participants from about 20 institutes in Korea

Application porting Support on FKPPL VO  Deployment of Geant4 applications  Used extensively by the National Cancel Center in Korea to carry out compute-intensive simulations relevant to cancer treatment planning  In collaboration with National Cancer Center in Korea  Deployment of two-color QCD (Quantum ChromoDynamics) simulations in theoretical Physics  Several hundreds or thousands of QCD jobs are required to be run on the Grid, with each jobs taking about 10 days.  In collaboration with Prof. Seyong Kim of Sejong University

17 User Community Support User Community Support  Sejong Univerisity  Porting of two-color QCD (Quantum chromo-dynamics) simulations on the Grid and large-scale execution on it  National Cancer Center  Porting of Geant4 simulations on the Grid for planning  KAIST  Used as a testbed for a grid and distributed computing course in computer science department  East-West Neo Medical Center in Kyung Hee University  Porting of Geant4 simulations on the Grid  Ewha Womans University  Porting of Gate applications on the grid

Deployment of QCD Simulations on the FKPPL VO

Our Two-color QCD Applications (1/2)  Large-scale  A large number of simulation jobs to be run with a wide range of different parameters  In our case, we have planned to run a total of 360 different QCD jobs with a different parameter set  beta = [1.50, 1.51, 1.52, …, 2.09, 2.10] (61)  J = [0.04, 0.05, 0.06] (3)  mu = [0.0, 0.57, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 1] (9)  Independent  Each job runs independently  Long-duration  Each QCD job goes through 400 steps to complete, each step taking an average of 1 Hour, so each QCD job takes an average of 400 hours

 Need a computing facility to run a large number of jobs  FKPPL VO provides computing resources sufficient to run the 360 QCD jobs all together concurrently  Need some grid tool to effectively maintain such a large-scale jobs running on the Grid without having to know the details of the underlying Grid  Ganga seems to be appropriate as a tool for managing such large number of jobs on the Grid Our Two-color QCD Applications (2/2)

Issues relating to long-running jobs on the Grid  Long-running jobs often fail to complete on the Grid  It is not straightforward to successfully get done a long-duration job like our two-color QCD simulation on the Grid  A Grid proxy certificate expires before the job’s completion  By default, the proxy has a lifetime of 12 hours  Each Grid site has its own site operational policy such as the maximum CPU time for a job to be allowed to run at a time SitesCE NodesMaxCPUTime (Min) CC-IN2P3 Jobmanager-bqs-short5 Jobmanager-bqs-medium227 Jobmanager-bqs-long1429 KISTIJobmanager-lcgpbs-fkppl2880

Application-level Checkpointing/Restarting  We have modified the original two-color QCD simulation code to support an application- level checkpointing scheme  The two color QCD code takes 400 steps to complete  Once a QCD job is launched successfully on the Grid, a intermediate result is generated at each step and saved into the checkpoint server  When a QCD job is detected to be stopped for some reason,  Ganga restarts it from where it has left by resubmitting it along with the latest intermediate result

23 Computing Element Storage Element IN2P3 (Re)Submit QCD job (executable + small inputs) Submit QCD job Retrieve output WMS Su2.x Retrieve status & (small) output files Input file(s) Output file(s) Overview of QCD Simulation Runs on the Grid Heartbeat Monitor Check status & Intermediate Result send intermediate result CheckpointServer Retrieve the latest Intermediate result

Preliminary Results published in CPC

Two-color QCD in Production  ~ about 75 CPU years  1,647 runs * 400 step * 1 hours = 658,800 hours  ~ 1,647 concurrent QCD runs on the FKPPL VO  The simulation started at the end of August and completed on December 8 th for ~ 3.5 months  Now, it’s under analysis by Prof. Seyong Kim of Sejong University

Number of QCD Jobs on the FKPPL VO

Towards France-Asia VO

FJKPPL Workshop on Grid Computing  FJPPL/FKPPL Joint workshop on Grid computing was held in KEK on December  Hosted by KEK  CC-IN2P3, KEK and KISTI agreed to move forward towards France-Asia VO

Perspectives for France-Asia VO  Computing Infrastructure  gLite Middleware based  Computing centers offering resources  CC-IN2P3, KEK, KISTI  IHEP in China ?  IOIT in Vietnam?  Data Infrastructure  IRODS (Integrated Rule-Oriented Data System)  Both KEK and CC-IN2P3 have some expertise on the operation and management the IRODS service and might be able to provide IRODS service in the future  Applications  It is important to have some applications with scientific results  As of now, we have applications such as:  In-silico docking applications  QCD simulations  Geant4/GATE applications

 User Communities  As of now, we have user communities mainly from Korea  We might be able to have communities from Japan and Vietnam  Geant4 communities (Japan)  In silico drug discovery communities (Vietnam)  ?? (China)  High-level Tools/Services  It is important to provide users with an easy-to-use high level tools  Some of tools that we have some expertise on  WISDOM  Ganga  JSAGA  DIRAC  ??  Training  In order to promote the awareness of the France-Aisa VO, it is important to organize some tutorials on glite middleware, high-level tools and applications Perspectives for France-Asia VO

Thank you for your attention