Keith A. Lantz

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A remote execution facility allows a user of a workstation-based distributed system to offload programs onto idle workstations, thereby providing the user with access to computational resources beyond that provided by his personal workstation. In this paper, we describe the design and performance of the remote execution facility in the V distributed system,(More)
This paper deals with the integration of multimedia conferencing facilities into an existing software environment. We assume that the "semantics" of the conferencing facilities have already been defined and address only the issue of how to implement those semantics in such a way as to minimize the impact on existing software. In particular, users should be(More)
Shared window systems enable existing applications to be shared in the context of a real-time teleconference. The development and successful use of several such systems, albeit within limited user communities, testifies to the merits of the basic idea. However, experience to date has suggested a number of areas that have not been adequately addressed,(More)
Replicating applications in a shared window environment can significantly improve the performance of the resulting system. Compared to a completely centralized approach, a replicated architecture offers superior response time and reduces network load. To date, however, these advantages have been overshadowed by the equally significant synchronization(More)
A major reason for the rarity of distributed applications, despite the proliferation of networks, is the sensitivity of their performance to various aspects of the network environment. We demonstrate that distributed applications can run faster than local ones, using common hardware. We also show that the primary factors affecting performance are, in(More)
A major reason for the rarity of distributed applications, despite the proliferation of networks, is the sensitivity of their performance to various aspects of the network environment. Contrary to much popular opinion, we demonstrate that CPU speed remains the predominant factor. With respect to network issues, we focus on two approaches to performance(More)
The proliferation of personal workstations and computer networks has enabled users to develop or otherwise access an ever wider range of applications. Unfortunately, the human-computer interface has not kept pace with the available hardware, nor with the aspirations of many users. Major advances are required with respect to the "style" of human-computer(More)
concepts and do not necessarily imply differences in implementation.) Data is transmitted between clients and servers by value. That is, RIG is communication oriented. Communication channels can be used to represent resources, but they are in fact only addresses used by clients to send data to servers and their use as a resource handle is a convention of(More)