Post on 10-May-2015
description
www.eu-eela.eu
E-science grid facility forEurope and Latin America
Introduction to Grid computing and e-infrastructures
Leandro N. Ciuffo <leandro.ciuffo@ct.infn.it>
INFN – Catania (Italy)
EELA-2 Application Support Manager
Grid User Tutorial
Kampala, 11.11.2009
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Computationally intensive research
Kampala - Uganda, Grid User Tutorial, 11.11.2009
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Computationally intensive research
Kampala - Uganda, Grid User Tutorial, 11.11.2009
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• The biggest experiment on Earth• LHC tunnel: 27 km circumference, 100m underground• 15 Petabytes of data per year (41TB per day)
• The biggest experiment on Earth• LHC tunnel: 27 km circumference, 100m underground• 15 Petabytes of data per year (41TB per day)
Kampala - Uganda, Grid User Tutorial, 11.11.2009
The Large Hadron Collider
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The power Grid paradigm
Electric Power Grid
System
coal wind
hydroelectric nuclear
Users can access electrical power coming from different (and heterogeneous) sources
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The computing Grid approach
Computing Grid
System
Users can access storage and computing resources coming from different (and heterogeneous) sources
The resources shared within the Grid can be physical objects
(CPUs, storage devices) or logical resources (computing queues, distributed file systems)
Kampala - Uganda, Grid User Tutorial, 11.11.2009
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The Grid Metaphor
GRID
MIDDLEWARE
Visualising
Workstation
Mobile Access
Supercomputer, PC-Cluster
Storage, Data from Sensors and instruments
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e-Science
Virtual Organisations
Applications
Data
Instruments
e-Infrastructure
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Summarizing…
• Grid computing involves connecting geographically remote computers into a single network to create a virtual supercomputer by combining the computational power of all computers on grid.
• Heterogeneous resources, usually owned by diverse organizations
Kampala - Uganda, Grid User Tutorial, 11.11.2009
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EGEE numbers:
The EGEE Grid
>260 sites54 countries~150,000 CPUs>28 PetaBytes~14,000 users~200 VOs~330,000 jobs/day
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The 1st Layer: The Global Network
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The 2nd Layer: The Global Grid
EELA/
EELA-2
OSG
TeraGrid
NAREGIEUMedGrid
BalticGrid
SEE-Grid
EUIndiaGrid
EUAsiaGrid
EUChinaGrid
DEISA
EGEE
SAGrid
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The South African National Grid
• A national project coordinated by Meraka Institute, in concert with Universities and National Laboratories, along the lines of EGEE, to provide an integrated collaborative, high-performance computing platform to the nation's researchers
• Currently :– 7 sites providing computing resources (storage, CPU), 5 in negotiation. – 2 sites provide core services (information index, workload management,
medatada, file catalogue)• Project entails
– Training and dissemination (collaboration with GILDA/INFN, EPIKH project)– Certificate Authority for accreditation to EUGridPMA under development
• Interoperability is paramount to international collaboration. Close coordination with IGI (Italian National Grid) and INFN– Middleware is 100% compatible with EGEE/EGI,
close coordination in deployment/upgrade, etc.
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The South African National Grid
• Web presence:– Main website http://sagrid.ac.za
– Support system : http://ops.sagrid.ac.za
– Documentation, collaboration : http://wiki.sagrid.ac.za, http://docs.sagrid.ac.za
– Events : http://indico.sagrid.ac.za
• Any questions to SAGrid Coordinator:Bruce Becker BBecker@csir.co.za
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Who do you trust?
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http://www.igtf.net
Grids need to know who you are
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Open Grid Forum
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http://www.ogf.org
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Software layer which fills the gap between users applications and distributed resources
Middleware
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Grid Middleware
• Globus Toolkithttp://www.globus.org/toolkit/
• UNICOREhttp://www.unicore.eu/
• Condorhttp://www.cs.wisc.edu/condor/
• ARChttp://www.nordugrid.org/middleware/
• OurGridhttp://www.ourgrid.org
• OGSA-DAI http://www.ogsadai.org.uk
• gLitehttp://glite.web.cern.ch/glite/
(…)
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Component layers
Network
Operating system
Core middleware services
Community services / APIs developed by users
User’s applications
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To learn more
• GridCafe: The place for everybody to learn about gridhttp://www.gridcafe.org/
• What is the Grid? http://access.ncsa.uiuc.edu/witg/
• iSGTW: What is a grid? A crash course in grid computinghttp://www.isgtw.org/?pid=1000550
• Gridipediahttp://www.gridipedia.eu/aboutgrid.html
• GILDA Wikihttps://grid.ct.infn.it/twiki/bin/view/GILDA
• EELA-2 - self-traininghttp://applications.eu-eela.eu/self_training.php?l=50