enabling grid computing using easygrid/lcg

EasyGrid architecture: enabling an on going experiment.

EasymoncarMonte Carlo Events generation

EasysubRaw data analisys

EasygftpGeneric data access

EasyappGeneric application

EasyrootRoot application

LCGGrid

middleware

Enables conventional softwareto use grid technologies:

•submission•gridification algorithms•follow up/ management•results/reports recovery

Grid becomes transparent to the user.Layer between complex LCG Middleware and user application.Easy to use! Does not requireTraining or knowledge.

Data gridification Functional gridification: Genetic Programming

Dataset

File-1

File-2

…

File-N

User binary

easygrid

WN1

WN2

WNN

LCGResults

Searching anti-Deuteron:Searching anti-Deuteron:Raw data: 1,500 million events1 week – 250 computer

Tau decay in N Tau decay in N neutral pionsneutral pionsMonte Carlo generation: 5 million eventsRaw data: 482 million events.

90% of all processing done in distributed fitness evaluation:

WN master

WN slave WN slave WN slave easygrid PVM

Discrimination background/neutral pion accuracyDiscrimination background/neutral pion accuracy: 82%Decrease in Processing timeDecrease in Processing time:

Stand alone 1node/2slaves 5 nodes/10slaves

80 Ksec 47 Ksec 19 Ksec 58% 24%

RandomPop Init

Fitnessevaluation

Converge?

Selectioncrossovermutation

Bestindividual

Generations

James Cunha Werner

Enabling one algorithm running in several worker nodes.Discriminate function to distinguish background from real neutral pions

…

Enabling many copies of the same binary code run in several datasets in parallel, using GRID capabilities.

BaBar Experiment:

US$60 million Detector installed at SLAC/ Stanford University:

•Thousands of measured points for each event.

•3,000 million real events (1999-2005)•3,200 million Monte Carlo events.

•2,500 computers in parallel running batch system•290,000 data files•161 Tera bytes of data

For more information: http://www.hep.man.ac.uk/u/jamwer

Particle Physics 2006 – IoP – University of Warwick

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