Edinburgh University Experimental Particle Physics

1
Edinburgh University Experimental Particle
Physics

• Alasdair Earl
• PPARC eScience Summer School September 2002

2
Overview

• What is Edinburgh PPE involved with
• GridPP
• BaBarGrid
• ScotGrid
• European DataGrid
• Projects I am involved with
• all of the above and more

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Stanford Linear Accelerator Center (SLAC)
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622Mb/s
2x2.5Gb/s
2x2.5Gb/s
UK Internal
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BdbServer Old Design
BdbServer, intended to make life easy for Data
Distribution Tools
User Request
BdbServer
Completed Notification
Temp Storage
User transfers data by preferred means
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New Computing Model
Tier A
Production Processing
Kanga, MC
Objectivity
CPUs, Storage
Tier B
Regional Centres (to be created)
Tier C
Edinburgh
Etc ...
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BdbServer outline
EDG RB
SLAC
other...
Globus / EDG / SRB Client
TCP/IP
MySQL Database
Web Server
ssh
World Wide Web
Https
Authentication request
Web Browser
Data
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BdbServer outline

• Globus 2.0
• EDG Client software
• Storage Resource Broker
• Improves custom software
• 2 packages become 1 (BdbServer BdbCopyJob)
• Generic Interface for future work

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ScotGRID outline
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Edinburgh ScotGRID outline

• Dalwhinnie
• Quad Intel PIII Zeon
• 16GB RAM
• 5TB RAID Array
• 1Gbit to SHRIF Network
• Globus 2.1, EU DataGrid WP1, 2, 6, 8?
• Soon to be upgraded

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Whats useful .

• Grid Certificates
• Virtual Organisations
• Gatekeeper / Resource Broker
• Grid FTP

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Whats not .

• Resource Overhead (latency etc)
• lack of central resource for info
• communication overhead (encryption)
• communication deficit (between areas)
• need for an expertise site
• politics