Real time groupware as a distributed system: concurrency control and its effect on the interface

  • Authors:
  • Saul Greenberg;David Marwood

  • Affiliations:
  • Department of Computer Science, University of Calgary, Calgary, Alberta, Canada T2N 1N4;Department of Computer Science, University of Calgary, Calgary, Alberta, Canada T2N 1N4

  • Venue:
  • CSCW '94 Proceedings of the 1994 ACM conference on Computer supported cooperative work
  • Year:
  • 1994

Quantified Score

Hi-index 0.00

Visualization

Abstract

This paper exposes the concurrency control problem in groupware when it is implemented as a distributed system. Traditional concurrency control methods cannot be applied directly to groupware because system interactions include people as well as computers. Methods, such as locking, serialization, and their degree of optimism, are shown to have quite different impacts on the interface and how operations are displayed and perceived by group members. The paper considers both human and technical considerations that designers should ponder before choosing a particular concurrency control method. It also reviews our work-in-progress designing and implementing a library of concurrency schemes in GROUPKIT, a groupware toolkit.