1 tier-2 data center at kyungpook national university for lhc-cms experiment hyangkyu park center...

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Tier-2 Data Center at Kyungpook National University

for LHC-CMS Experiment

HyangKyu ParkCenter 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

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“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 107 s ≈ 2.3 Peta-Byte/yr

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LEP & LHC in Numbers

LEP (1989/2000)

CMS (2009)

Factor

Nr. Electronic Channels 100 000 10 000 000 x 102 Raw data rate 100 GBs 1 000 TBs x 104 Data rate on Tape 1 MBs 100 MBs x 102 Event size 100 KB 1 MB x 10

Bunch Separation 22 s 25 ns x 103 Bunch Crossing Rate 45 KHz 40 MHz x 103 Rate on Tape 10 Hz 100 Hz x 10 Analysis 0.1 Hz

(Z0, W) 10-6 Hz (Higgs)

x 105

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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?

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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)

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https://vocms08.cern.ch/sitedb/sitelist/

KNU is registered as Tier-2 in CMS.

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http://t2-cms.knu.ac.kr

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Current Tier-2 Computing Resources

CPU

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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 System LCG

Support High Energy

CMS Computing Role

Tier-2

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TEIN2 North/ORIENT

622 155

45

45

155

PH

VN

TH

ID

MY

45

3 x 622

2.5G(622M)

North America(via TransPAC2)(via GLORIAD)

EU

EU

622

622M+1G

4 x 155

AU

HK

SG

JP

CN KR

KREONET/GLORIAD KR-CN

KOREN/APII KR-JP

APII/TEIN3, GLORIAD

TEIN3 South

622

622

10G(2G)

10G 10G

10G

Courtesy by Prof. D. Son and Dr. B.K. Kim

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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

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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

MG* =500 GeV

One Year Performances in KNU-Tier-2 (I)

MIT

DESY

KNU

MIT

UK-RAL

DESY

KNU

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

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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 2010 2011 2012 2013

CPU (kSI2k) 710 (470) 800 900 1000

Disk (TB) 205 (190) 230 250 250

Network (Gbps)

20 20 20 20

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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.