1 Tier-2 Data Center at Kyungpook National University for LHC-CMS Experiment HyangKyu Park Center for High Energy Physics Kyungpook National University.

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Presentation transcript:

1 Tier-2 Data Center at Kyungpook National University for LHC-CMS Experiment HyangKyu Park Center for High Energy Physics Kyungpook National University Daegu, Korea LHC Physics Workshop KonKuk U., Aug. 10~12, 2010

ROOT Tutorial (Tier-2 Summer School)  일시 : 8 월 12 일 14:00~18:00  장소 : PC 실 참여를 원하시는 분은 등록데스크 앞에서 모임

3  “The CMS detector is essentially 100-megapixel digital camera that will take 40 M pictures/s of particle interaction.” by Dan Green.  The High Level Trigger farm writes RAW events with 1.5 MB at a rate of 150 Hz. 1.5 MB x 150/s x 10 7 s ≈ 2.3 Peta-Byte/yr

4 LEP & LHC in Numbers LEP (1989/2000) CMS (2009) Factor Nr. Electronic Channels   x 10 2 Raw data rate  100 GB  s  TB  s x 10 4 Data rate on Tape  1 MB  s  100 MB  s x 10 2 Event size  100 KB  1 MB x 10 Bunch Separation 22  s 25 ns x 10 3 Bunch Crossing Rate 45 KHz 40 MHz x 10 3 Rate on Tape 10 Hz 100 Hz x 10 Analysis 0.1 Hz (Z 0, W) Hz (Higgs) x 10 5

5 The LHC Data Grid Hierarchy Outside/CERN Ratio Larger; Expanded Role of Tier1s & Tier2s: Greater Reliance on Networks KNU ~2000 physicists, 40 countries ~10s of Petabytes/yr ~1000 Petabytes in < 10 yrs?

6 Service and Data Hierarchy  Tier-0 at CERN – Data acquisition & reconstruction of raw data – Data Archiving (Tape & Disk storage) – Distribution of raw & recon data -> Tier-1 centers  Tier-1 – Regional & global serivces ASCC (Taiwan), CCIN2P3 (Lyon), FNAL (Chicago), GridKA (Kalsruhe), INFN-CNAF (Bologna), PIC (Barcelona), RAL (Oxford) – Data Archiving (Tape & Disk storage) – Reconstruction – Data Heavy Analysis  Tier-2 – ~40 sites (including Kyungpook National Univ.) – MC production – End-user Analysis (Local community use)

7 KNU is registered as Tier-2 in CMS.

8

9 Current Tier-2 Computing Resources CPU

10 CMS Computing Resources in KNU CPU (kSI2k)470 (~350 cpus) Disk Storage (TB)190 (14 of Disk Servers) Tape (TB)46 WAN (Gbps)20 (KREONET+KOREN) Grid SystemLCG SupportHigh Energy CMS Computing Role Tier-2

11 TEIN2 North/ORIENT PH VN TH ID MY 45 3 x G(622M) North America (via TransPAC2) (via GLORIAD) EU M+1G 4 x 155 AU HK SG JP CN KR KREONET/ GLORIAD KR-CN KOREN/APII KR-JP APII/TEIN3, GLORIAD TEIN3 South G(2G) 10G Courtesy by Prof. D. Son and Dr. B.K. Kim

12 CMS Computing Activities in KNU  Running Tier-2  Participating in LCG Service Challenges, CSAs every year as Tier-2 – SC04 (Service Challenge): Jun. ~ Sep.,2006 – CSA06 (Computing, Software & Analysis): Sep. ~ Nov., 2006 – Load Test 07: Feb ~ Jun., 2007 – CSA07: Sep. ~ Oct., 2007 – Pre CSA08: Feb.,2008 – CSA08: May~June, 2008 – STEP09: June, 2009  Testing, Demonstrating, Bandwidth Challenging – SC05, SC06, SC07, SC08,SC09  Supporting physics analyses – RS Graviton search – Higgs search – W’ search

13 Preparing Physics Analyses using KNU_T2  Study on Randall-Sundrum Graviton with the mode G * →ZZ →μ + μ - μ + μ - – Generation of total 800 k events: 80 sets of MCs (16 points x 5 parameters)  Study on Drell-Yan Process – MS student thesis topic – It took only 1 night for generation of 200 k MC events M G* =500 GeV

One Year Performances in KNU-Tier-2 (I) MIT DESY KNU MIT UK-RAL DESY KNU MIT DESY

One Year Performances in KNU-Tier-2 (II) MIT DESY KNU KNU -> T1

Recent Performances in KNU-Tier-2 (III) MIT DESY KNU T1 -> KNU

Recent Performances in KNU-Tier-2 (IV) ~90% efficiency

Recent Performances in KNU-Tier-2 (V)

Establishing CMS Center (I) MIT DESY Current worldwide CMS Centers

Establishing CMS Center (II) MIT DESY  Communication focal point for students, postdocs & faculties.  CMS operations: – Sub-detector data quality monitoring – Data analysis – CMS computing operation – Remote shift  Outreach Activities: – Increase CMS visibility – Attract new students – Tour and discussions with physicists – Live display, posters and other exhibits

Media Event for First 7 TeV Collisions in March 30 at the CMS Center MIT DESY

22 Future Plan  Manpower: Total 3 FTE  Computing Resources  Dedicated to the Exotica Group & QCD but strong desire to work with Higgs and SUSY group  Local user supports for physics analyses – We are accepting a proposal to use our Tier-2 resources Year CPU (kSI2k)710 (470) Disk (TB)205 (190) Network (Gbps) 20

23 Summary  We are pretty much ready for CMS physics analysis  Your support is vital for a success of Tier-2 operation.  LHC experiment has started, and produce “10 PB/yr” soon. It’s time to seriously think about LHC data center in Korea that will offer another big step for KR-HEP program.