Transcript EGEE Second Conference 22-26 November 2004 The

Enabling Grids for E-sciencE
Experience of using gLite for
analysis of ATLAS combined
test beam data
A. Zalite / PNPI
www.eu-egee.org
INFSO-RI-508833
Overview
Enabling Grids for E-sciencE
• EGEE project (Enabling Grid for E-sciencE)
• ARDA (A Realisation of Distributed Analysis
for LHC)
• Experience with gLite prototype
INFSO-RI-508833
The EGEE project
Enabling Grids for E-sciencE
• Create a European-wide Grid production quality
•
infrastructure for multiple sciences
Profit from current and planned national and
regional Grid programmes, building on
– the results of existing projects such as DataGrid
(EDG), LCG and others
– EU Research Network and industrial Grid developers
•
Support Grid computing needs common to the
different communities
– integrate the computing infrastructures and agree on
common access policies
• Exploit International connections (US)
•
70 leading institutions in 27 countries
(including Russia and US)
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ARDA
Enabling Grids for E-sciencE
• ARDA is an LCG project
– main activity is to enable LHC analysis on the grid
• ARDA is contributing to EGEE NA4
– uses the entire CERN NA4-HEP resource
• Work is based on last years experience/components
– Grid projects (LCG, VDT, EDG …)
– Experiments tools (Alien, Dirac, GAE, Octopus, Ganga, Dial,…)
• Interface with the new EGEE middleware (gLite)
– Key player in the evolution from LCG2 to the EGEE
infrastructure
– Verify the components in an analysis environments
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ARDA & HEP experiments
Enabling Grids for E-sciencE
ARDA is an
LCG project
whose main
task is to
enable LHC
analysis on
the GRID
CMS
Alice
LHCb
Ganga,Dirac,
Gaudi, DaVinci…
ROOT,AliRoot,
Proof…
Cobra,Orca,
OCTOPUS…
Atlas
Dial,Ganga,
Athena,
Don Quijote
ARDA
LCG2
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EGEE middleware (gLite)
Prototype overview
Enabling Grids for E-sciencE
LHC
Experiment
Main focus
Basic
prototype
component
Experiment
analysis
application
framework
GUI to Grid
GANGA
DaVinci
Interactive
analysis
PROOF
ROOT
AliROOT
High level
service
DIAL
Athena
Aligned with
APROM
ORCA
Exploit native
gLite
functionality
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Middleware
Future EGEE Middleware - gLite
Enabling Grids for E-sciencE
• Intended to replace LCG-2
• Starts with existing components
• Aims to address LCG-2 shortcoming and advanced needs from
applications (in particular feedback from DCs)
• Prototyping short development cycles for fast user feedback
• Initial web-services based prototypes being tested
LCG-1
LCG-2
gLite-1
gLite-2
Globus 2 based Web services based
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Basic Principles
Enabling Grids for E-sciencE
•
Lightweight (existing) services
– Easily and quickly deployable
– Use existing services where possible as
basis for re-engineering – be pragmatic
•
Interoperability
– Allow for multiple implementations
•
Portable
– Being built on Scientific Linux and Windows
•
Co-existence with deployed infrastructure
– Reduce requirements on participating sites
– Flexible service deployment
 Multiple services running on the same physical machine (if possible)
– Co-existence with LCG-2 and OSG (US) are essential for the EGEE Grid
service
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Middleware Prototype
Enabling Grids for E-sciencE
WN (lxn5211)
VOMS/myProxy
(lxn5210)
CE (lxn5210)
Database, proxy, ldap
(lxn5220)
SE dCache
(lxn5208)
GAS
(lxn5216)
Core services
(lxn5219)
Source: http://egee-jra1.web.cern.ch/egee-jra1/Prototype/testbed.htm
INFSO-RI-508833
SE Castor
(lxn5209)
ATLAS Combined Test Beam
Enabling Grids for E-sciencE
Real data processed at gLite
Standard Athena for testbeam
Data from CASTOR
Processed on gLite worker node
Example:
ATLAS TRT data analysis done
together with ARDA team
Number of straw hits per layer
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