Accession Number:

ADA318866

Title:

MIT SchMUSE: Class-Based Remote Delegation in a Capricious Distributed Environment.

Descriptive Note:

Memorandum rept.,

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE ARTIFICIAL INTELLIGENCE LAB

Personal Author(s):

• Blair, Michael R.
• Cohen, Natalya
• LaMacchia, David M.
• Zuzga, Brian K.

Report Date:

1993-02-20

Pagination or Media Count:

13.0

Abstract:

MIT SchMUSE pronounced shmooz is a concurrent, distributed, delegation-based object-oriented interactive environment with persistent storage. It is designed to run in a capricious network environment, where servers can migrate from site to site and can regularly become unavailable. Our design introduces a new form of unique identifiers called globally unique tickets that provide globally unique timespace stamps for objects and classes without being location specific. Object location is achieved by a distributed hierarchical lazy lookup mechanism that we call realm resolution. We also introduce a novel mechanism called message deferral for enhanced reliability in the face of remote delegation. We conclude with a comparison to related work and a projection of future work on MIT SchMUSE.

Descriptors:

• *DISTRIBUTED DATA PROCESSING
• *OBJECT ORIENTED PROGRAMMING
• DATA BASES
• DATA MANAGEMENT
• COMPUTER COMMUNICATIONS
• LOCAL AREA NETWORKS
• CONCURRENT ENGINEERING
• SYSTEMS ANALYSIS
• INTERACTIVE GRAPHICS
• DISTRIBUTED INTERACTIVE SIMULATION

Subject Categories:

• Computer Programming and Software
• Computer Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE