Transcript Edinburgh University Experimental Particle Physics Alasdair Earl PPARC eScience Summer School

Edinburgh University
Experimental Particle Physics
Alasdair Earl
PPARC eScience Summer School
September 2002
Overview

What is Edinburgh PPE involved with
– GridPP
– BaBarGrid
– ScotGrid
– European DataGrid

Projects I am involved with
– all of the above and more …
Stanford Linear Accelerator Center
(SLAC)
622Mb/s
2x2.5Gb/s
2x2.5Gb/s
UK Internal
BdbServer: Old Design
BdbServer, intended to make life easy for Data Distribution Tools
User Request
BdbServer
Completed
Notification
User transfers data
by preferred means
New Computing Model
Tier A
CPU’s, Storage
Objectivity
Kanga, MC
Production
Processing
Tier B
Regional Centres (to be created)
Tier C
Edinburgh
Etc ...
BdbServer++ outline
EDG RB
SLAC
TCP/IP
MySQL
Database
Web Server
World Wide Web
other...
Globus / EDG /
SRB Client
ssh
Https
Authentication &
request
Web Browser
Data
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

ScotGRID outline
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
What’s useful ….
Grid Certificates
 Virtual Organisations
 Gatekeeper / Resource Broker
 Grid FTP

What’s not ….
Resource Overhead (latency etc)
 lack of central resource for info
 communication overhead (encryption)
 communication deficit (between areas)
 need for an expertise site
 politics
