Accession Number:

ADA455551

Title:

The Core Legion Object Model

Descriptive Note:

Conference paper

Corporate Author:

VIRGINIA UNIV CHARLOTTESVILLE DEPT OF COMPUTER SCIENCE

Personal Author(s):

• Lewis, Mike
• Grimshaw, Andrew

Report Date:

1996-08-01

Pagination or Media Count:

12.0

Abstract:

The Legion project at the University of Virginia is an architecture for designing and building system services that provide the illusion of a single virtual machine to users, a virtual machine that provides secure shared object and shared name spaces, application adjustable fault-tolerance, improved response time, and greater throughput. Legion targets wide area assemblies of workstations, supercomputers, and parallel supercomputers. Legion tackles problems not solved by existing workstation based parallel processing tools the system will enable fault-tolerance, wide area parallel processing, inter-operability, heterogeneity, a single global name space, protection, security, efficient scheduling, and comprehensive resource management. This paper describes the core Legion object model, which specifies the composition and functionality of Legion s core objects those objects that cooperate to create, locate, manage, and remove objects in the Legion system. The object model facilitates a flexible extensible implementation, provides a single global name space, grants site autonomy to participating organizations, and scales to millions of sites and trillions of objects.

Descriptors:

• *PARALLEL PROCESSING
• *OBJECT ORIENTED PROGRAMMING
• MODELS
• REACTION TIME
• TARGETS
• SCHEDULING
• RESOURCE MANAGEMENT
• PARALLEL ORIENTATION
• SUPERCOMPUTERS
• WORK STATIONS
• SHARING
• SECURITY
• EFFICIENCY

Subject Categories:

• Computer Programming and Software
• Computer Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE