Grid WLCG M Witek On behalf of the team of Polish distributed Tier2 Outline Introduction History and status of Polish Tier2 Federation Example s of physics results from LHC experiments ID: 554156
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Slide1
Polish Contribution to the Worldwide LHC Computing
GridWLCG
M. WitekOn behalf of the team of Polish distributed Tier-2
Outline Introduction History and status of Polish Tier-2 Federation Examples of physics results from LHC experiments
CERN -
European
Organisation for Nuclear Reseach
LHC – Large Hadron Collider
CMS
Alice
LHCb
AtlasSlide2
Polish
WLCG Tier-2 team
Polish WLCG Tier-2 teamA. Binczewski3, M. Bluj5, A
. Cyz2, M. Dwużnik1, M. Filocha4, L. Flis1, R. Gokieli4,5, J.
Iwaszkiewicz4,
M. Kowalski2, P. Laso
ń1, R. Lichwała3, M. Łopuszy
ński4, M. Magryś1, P. Malecki2, N. Meyer3, K. Nawrocki4,5, A
. Olszewski2, A. Ozię
bło1, A. Pade
e4,5, H. Pałka2
,
M
. Pospieszny3, M.Radecki1, R. Rowicki4, D. Stojda6,4, M. Stolarek4, T. Szepieniec1, T. Szymocha1,2, M.Turała1,2, K.Wawrzyniak4,5, W.Wiślicki4,5, M.Witek2, P.Wolniewicz3Institutions1 AGH University of Science and technology, ACC Cyfronet AGH, Krakow2 Institute of Nuclear Physics PAN, IFJ PAN, Krakow3 Poznan Supercomputing and Networking Center, PSNC, Poznan4 Interdisciplinary Centre for Mathematical and Computational Modelling, ICM, Warsaw5 Soltan Institute for Nuclear Studies, IPJ, Warsaw6Copernicus Science Centre, CSC, Warsaw, Poland
More details will be available
in the article
of
PL-Grid Book
2Slide3
Eksperiment requirements
Example of on-line conditions
~108 electronic channels to read at 40 MHz1 PB/sec of raw info from the detector~few TB/sec of zero suppressed data ( channels with signal only)Multi-level trigger systemReduction factor 10
6-107Output rate > 100 MB/sec107 sec/year ~few PB of raw data per experiment
Level 1
Level 2
40 MHz
(1000 TB/sec)
Level 3
75 KHz
(75 GB/sec)
5 KHz
(5 GB/sec)
100 Hz
(100 MB/sec)
Data Recording &
Offline Analysis
WLCG
3Slide4
(
Pre)History
MONARC (Models of Networked
Analysis at Regional Centres for LHC Experiments)Simulate data processing (a kind of Monte Carlo model):a complex set of networked computing systems (CERN, Tier-1 and Tier-2 regional centres)the analysis process, composed of a dynamic workload of reconstruction and analysisthe behaviour of key elements of the system, such as distributed database servers and the networks
Summary
:
CERN-LCB-2000-001
One of the problems @ 2000:data sharing difficult due to the prohibitively high cost of networking4
Even more pronounced in Poland at that time !!!Slide5
From 2000 to 2011
2000: DataGrid 2000 – HEP oriented EU project2000: CERN-Poland
meeting (initiated by M. Turala & P. Malecki)2002: CrossGrid first Polish EU project with HEP task.2002: start of LCG (LHC Computing Grid)2003: First LCG testbed of 14 sites (Cyfronet
participation)
2004-2010: EGEE, EGEE II, EGEE III2003-2008: Participation in Data Challenges
2005-2010: BalticGrid, BalticGrid II2007: Poland signs
MoU for WLCG2009: start of PL-Grid project (WLCG infrastructure)2009-2011: LHC start
. Smooth running of Polish WLCG sites.
5Slide6
Polish participation in networking and grid projects
Polish part of WLCG emerged out of many different projects.
Some of them not directly related to HEP. Nevertheless they provided infrastructure and common tools.6
PIONIER, CrossGrid, EGEE and PL-Grid were essential for the development of Polish WLCG infrastructure.Slide7
7
GTS 1,6 Gb/s
GDAŃSK
POZNAŃ
ZIELONA
GÓRA
KATOWICE
KRAKÓW
LUBLIN
WARSZAWA
BYDGOSZCZ
TORUŃ
CZĘSTOCHOWA
BIAŁYSTOK
OLSZTYN
RZESZÓW
Bielsko-Biała
GÉANT
10+10 Gb/s
KOSZALIN
SZCZECIN
WROCŁAW
ŁÓDŹ
KIELCE
PUŁAWY
OPOLE
RADOM
BASNET 34 Mb/s
CESNET, SANET
GÉANT
/
TELIA
2x2,5 Gb/s
DFN 10 Gb/s
Gorzów
MAN
10 Gb/s
(1 lambda)
2 x
10 Gb/
s
1 Gb/s
CBDF
1
0
Gb
/s
PIONIER’S
FIBERS
Polish
infrastructure
in
WLCG
Tier1 FZK
Karlsruhe
Tier2 PCSS
Poznań
Tier2 ICM
Warszawa
Tier2 ACK
Cyfronet
Kraków
HEP VLAN
1
Gb
/s
HEP VLAN
1
Gb
/sSlide8
Pionier –
Polish
Optical InternetNationwide broadband optical network represents a base for research and development
Europe's first national academic network that uses its own dark fiber optics and DWDM 10GE transmissionConnects 21 Academic Network Centers of Metropolitan Area Networks (MAN) and 5 of the HPC (High Performance Computing) centers.Cross-border links with: Germany (DFN), Czech Republic (CESNET), Slovakia (SANET), Ukraine (UARNET), Byelorus, LithuaniaStarted in 2000, 5917,5 km of fibres cables @ 2010
Data sharing problem
due to networking limits
indicated by MONARC solved !
8Slide9
Towards physics results - that is what WLCG was built for
Every experiment (ALICE, ATLAS, CMS,
LHCb
) has its own computing model. All based on multi-tier structureSuccessful LHC restart in 2009Excellent performance of the LHC and the experiments3.5*1014 collisions delivered
in 2011
Polish
distributed
Tier-2Kraków-Poznań-Warszawa
The RAW data reside in Tier-0 and Tier-1. The final physics result is an effect of many processing steps. Some steps have to be repeated when better detector calibration and alignment appear.
The role of Tier-2 sites:
Monte Carlo production
Analysis centre (larger sites)
Limited reprocessing activity
9Slide10
LHCb computing model – DIRAC role
10Slide11
Polish WLCG resources
ACK
Cyfronet AGH – Tier2
Polish sites provide about 2% of the total computing power in proportion to the engagement of Polish scientists in the LHC experiments.Most of the resources comes from PL-Grid infrastructure
Polish
Tier-2 Federation
201020112012
CPU (HS06)105401305015800Disk
(TB)599810
1020
Tier-3 at IFJ PAN
WLCG
pledges
11
ReliabilityAvailabilityAtlasLHCbWarsaw ICM – Tier2CMSLHCb
Poznan
PSNC – Tier2
Alice
Atlas
July
2011Slide12
Poland in LCG accounting
A week with 9 % contribution of
Cyfronet
to the LHCb reprocessing of 2011 data.Congratulations for the site performance from the LHCb computing team. LHCb3.9% delivered by PolandCMS
2% delivered by Poland
Month
2011
MayJuneJulyAug
SeptUsage as % of pledge
165%266%299%
173%229%
Performance of
Polish
Tier-2 (
From WLCG Accounting)Increase over 100% mainly due to Cyfronet additional resourcesHighlight from LHCb12Atlas1.6 % Delivered by PolandTier-1/2At
present 69 Tier-2 federations in 33
countries. The size of
Polish Tier-2 is in top 20.Slide13
The Standard Model –
Particles and Forces
13
Bulding blocks of our UniverseSlide14
ATLAS and CMS – direct discovery potential
Find the last undiscovered element of the Standard Model
The Higgs bozonDirect discovery of New Physics Supersymmetric particles or any object/phenomena beyond Standard Model we even did not think about yet
ATLAS
CMS
The Higgs
boson search14Slide15
LHCb – LHC beauty experiment
Hunting the signs of new physics by precision measurements
Bs0→μ
+μ-Bs0 (bs) meson contains two quarks which are not present in the world around us: b
beauty and s
strangeExtremely rare decay
3 out of 109 decaysStandard Model
Supersymmery
New Physics
2
decays
observed
– 1.4
expectedNo sign of New Physics yet2 events selected out of recorded 1010 WLCG 2 events selected out of 3.5*1014 initial collisions New phenomena can significantly increase the decay rate15Slide16
Summary
Polish physicists and computer scientists created distributed WLCG Tier2, which availability and efficiency is high; the delivered resources are in the range 2-3 % of the total.The performance of the WLCG matches high requirements of the data processing of LHC experiments.
Lots of highest quality physics results are being shown recently. Much more are on the way, hopefully showing New Physics.16
AcknowledgmentsWe would like to thank all people for their contribution to the successful creation and operation of Polish Tier-2 Federation. In particular the management and staff of the three computing centres, ACC Cyfronet AGH in Krakow, ICM UW in Warsaw and PSNC in Poznan for their constructive cooperation. A supportive approach of the directorates of IFJ PAN Krakow and IPJ Warsaw is also appreciated. We are also grateful to many people from CERN, the FZK Karlsruhe and other WLCG collaborating institutions for their friendly advice and support.