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GRID

D. Royo, O. Ardaiz, L. Díaz de Cerio, R. Meseguer, A. Gallardo, K. Sanjeevan Computer Architecture DepartmentUniversitat Politècnica de Catalunya

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Outline

• Internet• GRID• Globus• ULabGrid• Summary

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Internet

• 1962 (tcp/ip)• 1994 (www)• Used for:

• EXCHANGE information (documents, messages, images, etc.)

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Outline

• Internet• GRID• Globus• ULabGrid• Summary

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GRID

• GRID (96): infrastructure that enables the use of computers (and resources in general) owned and managed by multiple organizations

Networked virtual supercomputers:networks connecting supercomputers, DB, scientific instruments... distributed geographically

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GRID Applications

• Smart instruments: Advanced scientific instruments coupled with supercomputers, users and databases.

• Distributed supercomputing: to solve problems too large to fit on any single computer

• Teraflop desktops: transfer intensive operations to more capable resources

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GRID Applications

• Aplication Service Provider (ASP) and Computing farms• Service-oriented: Out-sourcing hardware,

software, services in general• Access any resource through WWW

• Software and hardware.

Idea: the end-users do not acquiere the resources only uses them and pay for it

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Advantages

• Save money• only a PC to access the net (save 30%)

• management and maintenance (save up

65%)

• Avoid hardware and software updates• ASP’s ensures the updating

• Flexible information access • From anywhere at anytime

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Advantages

• Possibility to solve new problems• Interoperability• Small users can access the service

• Out-source the service is cheap

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System Key Characteristics

• Heterogeneity at multiple levels• Hardware, software, networks, users,

etc.

• Multiple administrative domains• Security problems: authentication

mechanism, acces policies, etc.• Fiability• Accounting

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Outline

• Internet• GRID• Globus• UlabGrid• Summary

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Globus

• What is Globus?

Research and development project focused on enabling the application of Grid concepts to scientific and engineering computing

To help to build GRIDS and develop GRID applications

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Globus Services

• Basic modules• Resource Management (GRAM)• Communication (Nexus)• Information (MDS)• Security (GSI)• Helth & Status (HBM)• Remote Data Access (GASS)• Executable Management (GEM)

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Globus Services

Metacomputing TestbedsI-WAY/GUSTO

Globus Toolkit modules

Applications andHigher level services

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Globus Services: Nexus

• Communication services• Flexible Nexus Communication Library

• Define communication links• Perform Remote Service Request (RSR)• Select the protocol for a RSR depending

when, where and what is being communicated

MPI: if diferent nodes of a parallel computerTCP/UDP: if different computers reliable/unreliable

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Globus Services: GridFTP

• Data Transfer Protocol: GridFTP• Parallel data transfer: multiple TCP

streams

• Partial file transfer• Striped data transfer: partitioning data

across multiple servers

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Outline

• Internet• GRID• Globus• ULabGrid• Summary

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ULabGrid

ULabGrid

Student Student Student Student

Web Browser Web Browser Web Browser Web Browser

School 1 School 2

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Pcribes.ac..upc.es

ReplicaMgr MetadataDirec

toryServer

Grid-Proxy GassServer

GlobusPortalUser Directory

Session Scheduler

Resource Mgr

GassServerGlobus-Gatekeeper

File Server

GSSHFTPGlobus-

Gatekeeper

avant.upc.es

Pentium IV pcmartino.ac.upc.es

1->Deploy Application

Student

Instructor: Manages Ulab Apps

%Vnc-server:1%nam &

GassServerGlobus-Gatekeeper

Pentium IV pc3.ac.upc.es

GassServerGlobus-Gatekeeper

Pentium IV pc5.ac.upc.es

GassServerGlobus-Gatekeeper

Pentium IV pc4.ac.upc.es

GassServerGlobus-Gatekeeper

Pentium IV pc5.ac.upc.es

ULab Grid

Web Browser

VNC-client

2->Launch NAM

3->Put User Files

4->Exec VNC, Exec NAM

5-Return VNC port

6->Interact with NAM

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ULabGrid Modules

• Session Scheduler• Resource Management• Collaborative services• File Management• Tool management and deployment

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Advantages of using ULabGrid

• Software installing and maintenance

• Licensing• Easy acces to hardware and

software resources• Easy to change the lab contents• Simplified interfaces

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More advantages ...

• Students can be exercices at home without physical presence at the educational center

• Students can familiarize with the execution tool environment before the course starts• Manuals• examples

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Outline

• Internet• GRID• Globus• ULabGrid• Summary

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Summary

• Information of interest• GRID Forum• www.globus.org• The Grid: Blueprint for a New

Computing Infrastructure, I. Foster and C. Kesselman

Morgan Kaufmann