The LCH Grid - High Performance Computing in High Energy Particle Physics

The LHC Grid High Performance Computing in

High Energy Particle Physics

Saturday, 1 June 13 Lukasz Kreczko -‐ Bristol IT MegaMeet 1

$ whoami

•  Lukasz Kreczko – ParGcle Physicist •  Graduated in Physics from University of Hamburg in 2009

•  2009 – 2013 PhD in ParGcle Physics at the University of Bristol

•  Currently CompuGng Research Assistant at the University of Bristol


The experiment: a big digital camera


The experiment: a big digital camera


40 million “pictures” per second

Each “picture” around 1 MB!

The data: a structured mess


The data: a much nicer picture


Muon:

pT=71.5GeV/c

η=‐0.82

MissingET:

22.3GeV

Jet:

pT=89.0GeV/c

η=2.14

Jet:

pT=85.3GeV/c

η=2.02

Jet:

pT=90.5GeV/c

η=‐1.40

Run:163583

Event: 26579562

Jet:

pT=84.1GeV/c

η=‐2.24

m(F)=1.2TeV/c2_

The goal: extend our knowledge


Muon:

pT=71.5GeV/c

η=‐0.82

MissingET:

22.3GeV

Jet:

pT=89.0GeV/c

η=2.14

Jet:

pT=85.3GeV/c

η=2.02

Jet:

pT=90.5GeV/c

η=‐1.40

Run:163583

Event: 26579562

Jet:

pT=84.1GeV/c

η=‐2.24

m(F)=1.2TeV/c2_

Billions of + simulaGon

(GeV)!!m110 120 130 140 150S

/(S+B

) Wei

ghte

d E

vent

s / 1

.5 G

eV

0

500

1000

1500

DataS+B FitB Fit Component

"1±"2±

-1 = 8 TeV, L = 5.3 fbs-1 = 7 TeV, L = 5.1 fbsCMS

(GeV)!!m120 130

Eve

nts

/ 1.5

GeV

1000

1500Unweighted

The goal: extend our knowledge


Muon:

pT=71.5GeV/c

η=‐0.82

MissingET:

22.3GeV

Jet:

pT=89.0GeV/c

η=2.14

Jet:

pT=85.3GeV/c

η=2.02

Jet:

pT=90.5GeV/c

η=‐1.40

Run:163583

Event: 26579562

Jet:

pT=84.1GeV/c

η=‐2.24

m(F)=1.2TeV/c2_

Billions of + simulaGon

(GeV)!!m110 120 130 140 150S

/(S+B

) Wei

ghte

d E

vent

s / 1

.5 G

eV

0

500

1000

1500

DataS+B FitB Fit Component

"1±"2±

-1 = 8 TeV, L = 5.3 fbs-1 = 7 TeV, L = 5.1 fbsCMS

(GeV)!!m120 130

Eve

nts

/ 1.5

GeV

1000

1500Unweighted

That’s the famous Higgs boson

Analysing all data

•  CMS records 10 000 Terabytes of data every year (around 70 years of full HD movies)

•  + same amount of simulaGon

•  To analyse this on a single computer would

take 64,000 years!

9

Analysing all data

•  CMS records 10 000 Terabytes of data every year (around 70 years of full HD movies)

•  + same amount of simulaGon

•  To analyse this on a single computer would

take 64,000 years!

10

The compuGng model: the decision


The compuGng model


The compuGng model


Bristol is one of the T2 centres

The computer centres

All over the world

All over the world

On a normal day, the grid provides 100,000 CPU days execuGng 1 million jobs

PhEDEx: A Bristol invenGon

•  short for “Physics Experiment Data Export”

•  Sodware for data placement and the file transfer system

•  Development started in Bristol

•  One of the main developers (now at Cloudant) is giving a talk later today “Your Database to the Cloud, an Intro to Cloudant NoSQL”


PhEDEx: The components


Transfer agent

Transfer management database

Management agent

Tools to manage transfers

Local agents

Web monitoring

PhEDEx: data monitoring


150 PB

70 PB

hjp://www.flickr.com/photos/paulrossman/6555010435/sizes/l/in/photostream/

Current and future topics


Things changed: Network is genng cheaper as well




We are moving into the cloud




We are moving into the cloud

Any data anywhere!

Other current and future topics


Protocol buffers CouchDB

Hadoop Provisioning of compuGng

Summary & Outlook

•  The LHC grid is a world-‐wide distributed compuGng network that makes discoveries possible

•  The grid is changing to adopt to current technologies

•  In two years Gme the LHC will increase its energy to 14 TeV – more data, more discoveries to come!


Date post:	19-May-2015
Category:	Technology
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The LCH Grid - High Performance Computing in High Energy Particle Physics

Technology