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OPTICAL ANSWERS TO GRID QUESTIONS. Karen McPherson C.S. Major Radford University. SOURCE. “Grid-Controlled Lightpaths for High Performance Grid Applications"

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Optical answers to grid questions

OPTICAL ANSWERS TO GRID QUESTIONS

Karen McPherson

C.S. Major

Radford University


Source
SOURCE

  • “Grid-Controlled Lightpaths for High Performance Grid Applications"

  • Authors: Raouf Boutaba, Wojciech Golab, Youssef Iraqi, Tianshu Li, and Bill St. Arnaud published by Kluwer Academic Publishers, 2004.

  • Information as well as quoted material is from this source.


Contents
CONTENTS

  • Definitions

  • Introduction

  • Architecture

  • Security

  • Conclusion

  • Q & A


Definitions
Definitions

  • Wavelength Division Multiplexing: Technology by which optical lines are divided for traffic by wavelength

  • Dark fiber: Installed but unused fiber-optic cable

  • Lightpath Object: An abstraction of one or more lightpaths representing a connection between two or more switches


Introduction
Introduction

  • Question: What is the best network support for the data intensive nature of grids?

  • Answer: Optical networks


Capacity cost
Capacity & Cost

  • Optical networks provide the speed, reliability, and capacity ideal for huge data transfer

  • Emergence of new technologies such as WDM reduces cost of implementation

  • Existence of a great deal of currently available dark fiber reduces costs further



Architecture

Administrator implemented over the internet - are too slow and unreliable

Customer

Grid Application

User Access Layer

Service Provisioning Layer

Resource Management Layer

Physical Layer

Cross-connect devices and lightpaths

Architecture

Figure 1. The User Controlled Lightpath Management System is represented by three main layers: User Access Layer (UAL), Service Provisioning Layer (SPL), and the Resource Management Layer (RML)


User access layer ual
User Access Layer (UAL) implemented over the internet - are too slow and unreliable

  • Uses an HTML interface

  • Incorporates many XML and web based tools by implementing Java Web Services Developer Pack from Sun Microsystems

  • Main role is to translate user requests into operations on the services in the Service Provisioning Layer


Service provisioning layer spl
Service Provisioning Layer (SPL) implemented over the internet - are too slow and unreliable

  • Consists of Globus Toolkit 3.0 and JBoss application server

  • XML based framework – application / platform independence

  • Maintains information on LPOs and users in a relational database

  • Main role is to provide services by manipulating Lightpath Objects (LPO)


Resource management layer rml
Resource Management Layer (RML) implemented over the internet - are too slow and unreliable

  • Each cross-connect device is represented by a “Resource Agent”

  • Main role is to provide control over the individual devices

  • Incorporates the ability to customize system control with Java byte code

    • For example: creating your own monitoring policies


Spl services
SPL Services implemented over the internet - are too slow and unreliable

  • These services - provided as grid services - manage the LPO resources

  • A Lightpath Object is just that – an object. It contains fields for:

    • a unique ID

    • the IDs of the current and previous owner

    • advertisement and lease expiry dates

    • a status indicating whether the LPO is reserved for use by the owner or has been advertised, partitioned, or concatenated and

    • bandwidth in kbps

    • hardware parameters


Spl services cont
SPL Services (cont) implemented over the internet - are too slow and unreliable

  • CreateRootLPO: This is the basic service managed by the appropriate administrators and utilizes the root LPOs mentioned in the previous section

  • AdvertiseLPO and LeaseLPO: Ownership of lightpaths is transferred by means of “leasing”

  • PartitionLPO and ConcatenateLPO: These services are key in creating division and formation of lightpath bandwidths


Spl services cont1
SPL Services (cont) implemented over the internet - are too slow and unreliable

  • AccessLPO: This service prepares a particular path for data traffic

  • ReconfigureLPO: This service is used for lightpath access policy control

  • EstablishEndToEndLPO: This service uses those above to form lightpaths, i.e., forming a path of a specific bandwidth between specific endpoints


Security
Security implemented over the internet - are too slow and unreliable

  • The foundation of the security defense presented by this research is achieved by capitalizing on the Grid Security Infrastructure (GSI) supplied by Globus Toolkit 3.0


Gsi security
GSI Security implemented over the internet - are too slow and unreliable

  • mutual authentication - based on public key encryption and Secure Socket Layer

  • transport layer security - httpg

  • message layer security - XML encryption


Custom security
Custom Security implemented over the internet - are too slow and unreliable

  • GSI insufficient to deal with user privileges in this lightpath management system

  • Researches implemented an additional, separate authorization mechanism

  • Implementing their own control allowed the researchers to add a customization feature to this authorization.


Conclusion
Conclusion implemented over the internet - are too slow and unreliable

  • The solution offered by “Grid-Controlled Lightpaths for High Performance Grid Applications” does appear to confirm optical answers to grid questions

  • The solution delivers grid level data transfer at a realistic cost

  • The management offered by this research also seems to address grid needs - by using a “grid-centric” approach such as the services provided in the SPL, this system may be utilized by grid applications in a very innate way


Q & A implemented over the internet - are too slow and unreliable


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