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The core Legion object model

M. Lewis, A. Grimshaw
1996 Proceedings of 5th IEEE International Symposium on High Performance Distributed Computing HPDC-96  
This document describes the core Legion object model.  ...  The model specifies the composition and functionality of Legion's core objects-those objects that cooperate to create, locate, manage, and remove objects from the Legion system.  ...  This document describes the core Legion object model.  ... 
doi:10.1109/hpdc.1996.546226 dblp:conf/hpdc/LewisG96 fatcat:e5qjwne57rcnrijfwgs5v7fjzu

Support for extensibility and site autonomy in the Legion grid system object model

Michael J. Lewis, Adam J. Ferrari, Marty A. Humphrey, John F. Karpovich, Mark M. Morgan, Anand Natrajan, Anh Nguyen-Tuong, Glenn S. Wasson, Andrew S. Grimshaw
2003 Journal of Parallel and Distributed Computing  
We present the core design of the Legion architecture, with focus on the critical issues of extensibility and site autonomy.  ...  The Legion system is an implementation of a software architecture for grid computing.  ...  The Legion object model specifies the functionality but not the implementation of the system's core objects; the core system therefore consists of extensible, replaceable components.  ... 
doi:10.1016/s0743-7315(03)00012-1 fatcat:pryndu6355cyzg6kztnu7gdjum

Legion-a view from 50,000 feet

A.S. Grimshaw, W.A. Wulf
1996 Proceedings of 5th IEEE International Symposium on High Performance Distributed Computing HPDC-96  
In this paper we present a high-level overview of Legion, its vision, objectives, a brief sketch of how some of those objectives will be met, and the current status of the project.2 1.  ...  of the underlying physical system for the usel: Legion is a metasystem project at the University of Virginia designed to provide users with a transparent intelface to the available resources, both at  ...  The Legion object model specifies the composition and functionality of Legion's core objects-those objects that cooperate to create, locate, manage, and remove objects from the Legion system.  ... 
doi:10.1109/hpdc.1996.546177 dblp:conf/hpdc/GrimshawW96 fatcat:uvuedhi3kfcwjnk7huaewknja4

Resource management in Legion

Steve J. Chapin, Dimitrios Katramatos, John Karpovich, Andrew Grimshaw
1999 Future generations computer systems  
In this paper, we describe the resource management portions of the Legion metacomputing system, including the basic model and its implementation.  ...  The recent development of gigabit networking technology, combined with the proliferation of low-cost, high-performance microprocessors, has given rise to metacomputing environments.  ...  Infrastructure and the Legion core objects.  ... 
doi:10.1016/s0167-739x(99)00011-4 fatcat:w2oshvgkybdanedhdjmlphqsyu

A philosophical and technical comparison of Legion and Globus

A. S. Grimshaw, M. A. Humphrey, A. Natrajan
2004 IBM Journal of Research and Development  
We compare and contrast Legion and Globus in terms of their underlying philosophy and the resulting architectures, and we discuss how these projects converge in the context of the new standards being formulated  ...  Legion and Globus are pioneering grid technologies. Several of the aims and goals of both projects are similar, yet their underlying architectures and philosophies differ substantially.  ...  The Legion object model specifies the functionality but not the implementation of the system core objects; the core system therefore consists of extensible, replaceable components.  ... 
doi:10.1147/rd.482.0233 fatcat:yhaz6tqqzfahblwc6qg3qbnrzm

The Legion Resource Management System [chapter]

Steve J. Chapin, Dimitrios Katramatos, John Karpovich, Andrew S. Grimshaw
1999 Lecture Notes in Computer Science  
The Legion resource management system is exible both in its support for system-level resource management but also in their adaptability for user-level scheduling policies.  ...  Managing the resources in such a system is a complex task, but is necessary to e ciently and economically execute user programs.  ...  Infrastructure and the Legion core objects.  ... 
doi:10.1007/3-540-47954-6_9 fatcat:xs7pwl54snd2lbsrvzsqmqfazq

A flexible security system for metacomputing environments [chapter]

Adam Ferrari, Frederick Knabe, Marty Humphrey, Steve Chapin, Andrew Grimshaw
1999 Lecture Notes in Computer Science  
We present the Legion security architecture, a flexible, adaptable framework for solving the metacomputing security problem.  ...  those underlying resources must minimize their vulnerability to attacks from the metacomputer level.  ...  Core Objects Within this general object model, Legion defines the interfaces to a set of basic classes that are fundamental to the operation of the system, and that support the implementation of the object  ... 
doi:10.1007/bfb0100598 fatcat:uyml36jdezc73gpszdflphuuyy

Legion: Lessons Learned Building a Grid Operating System

A.S. Grimshaw, A. Natrajan
2005 Proceedings of the IEEE  
This paper provides an overview of the architectural principles that drove Legion, a high-level description of the system with complete references to more detailed explanations, and the history of Legion  ...  Legion was the first integrated grid middleware architected from first principles to address the complexity of grid environments.  ...  The Legion object model specifies the functionality but not the implementation of the system's core objects; the core system, therefore, consists of extensible, replaceable components.  ... 
doi:10.1109/jproc.2004.842764 fatcat:6zkmjw7xdbc3no5z6unnmgkdzy

Beyond the "device as portal": meeting the requirements of wireless and mobile devices in the legion grid computing system

B. Clarke, M. Humphrey
2002 Proceedings 16th International Parallel and Distributed Processing Symposium  
This paper describes the unique capabilities of the Legion Grid computing infrastructure that will directly support these nextgeneration, powerful devices as first-class entities. 1 Resources on the order  ...  of workstations are also the primary focus of the Peer-to-Peer space [16].  ...  Support This work was supported in part by the National Science Foundation grant EIA-9974968, the NSF PACI program, the NASA Information Power Grid program, and a gift from Microsoft Research.  ... 
doi:10.1109/ipdps.2002.1016594 dblp:conf/ipps/ClarkeH02 fatcat:ltxksowxdndi3dzwmt3qa4pasi

Wide area computing: resource sharing on a large scale

A. Grimshaw, A. Ferrari, F. Knabe, M. Humphrey
1999 Computer  
Legion, a network-level operating system, was designed from scratch to target wide-area computing demands.  ...  Acknowledgments We thank Charles Guttmann of the Department of Radiology, Harvard Medical School, for the MRI example, and Greg Follen of NASA's Lewis Research Center for briefing us on Boeing and Pratt  ...  This work was partially supported by DARPA (Navy) contract #N66001-96-C-8527, DOE grant DE-FD02-96ER25290, DOE contract Sandia LD-9391, Northrup-Grumman (for the DoD HPCMOD/ PET program), and DOE D459000  ... 
doi:10.1109/2.762790 fatcat:qasg4j2anfaflfezjz5bnmpkji

Global Grids and Software Toolkits: A Study of Four Grid Middleware Technologies [chapter]

Parvin Asadzadeh, Rajkumar Buyya, Chun Ling Kei, Deepa Nayar, Srikumar Venugopal
2006 High-Performance Computing  
A comparison of these systems on the basis of the architecture, implementation model and several other features is included.  ...  This chapter will focus on four of these middlewares-UNICORE, Globus, Legion and Gridbus.  ...  Acknowledgement We would like to thank Sven van den Berghe from the Fujitsu Laboratories of Europe for his valuable technical guidance during the creation of Gridbus broker adaptor for Unicore environment  ... 
doi:10.1002/0471732710.ch22 fatcat:b5323qajmfh4zprla3it3zoiru

Campus-Wide Computing : Early Results Using Legion At the University of Virginia

Andrew S. Grimshaw, Anh Nguyen-Tuong, Michael J. Lewis, Mark Hyett
1997 The International Journal of Supercomputer Applications and High Performance Computing  
The CWVC extends an existing object-oriented parallel processing system by aggressively incorporating lessons learned in the last twenty years of heterogeneous distributed computing.  ...  We have built a working Legion prototype, called the Campus-Wide Virtual Computer (CWVC).  ...  In March of 1996 we began our implementation of the core Legion object model.  ... 
doi:10.1177/109434209701100206 fatcat:yujjsnfynbgrdo2epxvhg3v2hi

Structure Slicing: Extending Logical Regions with Fields

Michael Bauer, Sean Treichler, Elliott Slaughter, Alex Aiken
2014 SC14: International Conference for High Performance Computing, Networking, Storage and Analysis  
In this paper, we present structure slicing, which incorporates fields into the logical region data model.  ...  To address this problem we previously proposed a data model based on logical regions and described Legion, a programming system incorporating logical regions.  ...  STRUCTURE SLICING In this section we present extensions to the Legion programming model for structure slicing.  ... 
doi:10.1109/sc.2014.74 dblp:conf/sc/BauerTSA14 fatcat:vqinvcz2cnd6pfjkxdalg2qcwe

Grids and Grid technologies for wide-area distributed computing

Mark Baker, Rajkumar Buyya, Domenico Laforenza
2002 Software, Practice & Experience  
This paper aims to present the state-of-the-art of Grid computing and attempts to survey the major international efforts in developing this emerging technology.  ...  Moreover, due to the rapid growth of the Internet and Web, there has been a rising interest in Web-based distributed computing, and many projects have been started and aim to exploit the Web as an infrastructure  ...  ACKNOWLEDGEMENTS The authors would like to acknowledge all developers of the systems or projects described in this article.  ... 
doi:10.1002/spe.488 fatcat:qcgblfolg5aori5m4fncgqdhsy

Enabling Hybrid Parallel Runtimes Through Kernel and Virtualization Support

Kyle C. Hale, Peter A. Dinda
2016 SIGPLAN notices  
We describe the design and implementation of two new tools that support the HRT model.  ...  We have realized several prototype HRTs, including one based on the Legion runtime, and we provide application macrobenchmark numbers for our Legion HRT.  ...  Two core tools, the Nautilus Aerokernel and HVM, enable the model.  ... 
doi:10.1145/3007611.2892255 fatcat:wdqpa7p5efafhkzw54o33apyoe
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