byunggu cheon sungkyunkwan university (on the behalf of hep datagrid working group) 22~23 august,...
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ByungGu CheonSungkyunkwan University
(On the behalf of HEP DataGrid Working Group)
22~23 August, 20032nd Int. Workshop on HEP Data GridKyungpook National Univ., Daegu
BELLE Data Grid in Korea
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Why does BELLE ?
outlineKEKB/BELLE in generalBELLE Computing & Data GridKorBELLE* Data Grid Summary & Plan
* KorBELLE : Korean BELLE group
To study matter-antimatter asymmetry in B meson decays
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KEKB / BELLE
BELLE detector
3.5GeV e+ & 8GeV e- Asymmetric Collider3km circumference, 11mrad Xing angleLmax = 1.06 X 1034 cm–2s–1 (world record)Ldt(6/99-6/03) = 158 fb–1 @{(4S)+off(~10%)} (140fb-1 : 1.52x108 BB pair
s)Super-KEKB(L > 1035 cm–2s–1 ) project has be
en prepared !!
KEKB ColliderKEK, Tsukuba-city,JAPAN
~350 scientists, 55 institutions, many nations
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BELLE 2003 highlights
54 abstracts submitted to LP2003 (Fermilab)CPV and Beauty related time-dependent CP measurements
o update of BJ/KS (1)o with BJ/), D*+KS(1)
new method for 3 : Dalitz plot analysiso BD0K+ {D0KS -}
evidence/observationo BK(*)l+l-, , D+D-,
Charm related new processes/particles
o new excited DS+ states
o new charmoniumo first radiative: D0
different of CP lifetime in D0 (yCP)
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BELLE 2003 highlights
S
S
KB
KJB
→
→0
11.009.0
1
01
50.096.02sin
/028.0057.0733.02sin
First Indication of Beyond Standard Model in quark sectorSee more detail at http://belle.kek.jp
140 fb-1
Theoretically cleanest example:
In the absence of New Physics, S= sin21
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BELLE analysis framework
The only framework for all processing stages (from DAQ to final analysis)Event parallelism on SMP (1995~) Using fork (for legacy Fortran common blocks)
Event parallelism on multi-compute servers (dbasf, 2001~)User analysis code/reconstruction code are dynamically loaded.
= BASF =
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Data storage : 0.5 ~ 3PB Raw Data : ~200trig*50KB*240days ~200TB DST,MDST,MC(x10MDST) Data
CPU speed : few ~ 20 TFLOTS DST/Skim (re-)processing, MC prod., Physics analyses 47 4CPU 500MHz Sparc (Solaris2.7) History of PC-farm (Linux RH7.3) CPU increment
’99/06: 16 4CPU 500MHz Pen III ’00/04: 20 4CPU 550MHz Pen III ’00/10: 20 2CPU 800MHz Pen III ’00/10: 20 2CPU 933MHz Pen III ’01/03: 60 4CPU 700MHz Pen III ’02/01: 127 2CPU 1.26GHz Pen III ’02/12: 113 2CPU Athlon 2000 ’03/03: 84 2CPU 2.8GHz Pen IV
Hard to manage the needs of over-capacity How to slove in the future Grid project !!
BELLE Computing Needs
0
400
800
1200
1600
Ldt
Computing resource
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Status of BELLE Data Grid
BELLE is now working with several research groups on Data Grid.Austrelia/Korea Groupswhoelse??For research purpose onlyEventually for us to use the vast resource on computers outside BELLE, we may distribute our data.
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Computing for KorBelle Data Grid
Data processing resource @KNU Computing node : 10 2CPU 1.7GHz AMD Batch job server : 1 2CPU 1.7GHz AMD
Data storage : 5 TB @KNUOS/c++ : RedHat 7.3 w/ gcc3.0.4Latest Belle library version(20030716)Batch job system : OpenPBS-2.3KorBelle PC cluster software Job distribution system developed by jhkim@SKKU
Other KorBelle institutions have own resources. SKKU : 550GB Raid storage & 4 2CPU 1GHz Pen III
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Job Distribution System
Purpose Fast run time MC prod. factory HEP Data Grid R&D
KorBELLE PC cluster Based on gcc3.0.4 All nodes have BASF cod
e & Linux/Globus V1.0/V2.0
KorBELLE PC cluster V2.0
QQ(EvtGen)
GEANT (DetSim)
Skim Analysis
QQConfig
QQProcess
Node01
RUNConfig
RUNProcess
Node02 Node03 Node04
Batch Job System
KNU Data Storage (Real/MC data)
Belle-lib server(BASF)
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KorBELLE PC cluster test
200K MC events BJ/KS decays
Several distributions were compared with different situation. mass, momentum, etc
The cluster run-time ~1/N * single node
KorBELLE JDS works fine.
J/ mass distribution
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KorBELLE Data Grid
Globus Toolkit v2.2 has been adopted. Belle-lib(BASF) has been performed with it. Gsim event display test was successful. Linkage of JDS is under study.
CA (Certification Authority) Primitive CA is functional to allow accessing to GT.
Belle-lib(BASF) server
users job
Job Distribution System
Batch Job System
NODES
Globus Toolkit
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Gsim event display under GT
1. Script for CA to access GT environment
2. Interactive executable under GT env.
1
2
BASF outputs
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KorBELLE Data Grid
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Gridbus project @Melbourne
Australian group has been working on Grid prototype
for Belle physics analyses.
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Summary & Plan
BELLE starts thinking of Data Grid as official.Austrelia/Korea group have been involved in it.KorBELLE JDS has been established for it.We have adopted GT v2.2 for the testbed.Grid-base GUI software will be prepared for easy use/access.
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KorBelle PC cluster V1.0
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GbE Network : KNU-KEK
1Gbps