A wide-area service discovery infrastructure provides a repository in which services over a wide area can register themselves and clients everywhere can inquire about them. In this paper, we discuss how to build such an infrastructure based on the peer-to-peer model. The proposed system, called Neuron, can be executed on top of a set of federated nodes across the global network and aggregate th...

Measurement and analysis of current behavior are valuable techniques for the study of computer networks. In addition to providing insight into the operation and usage patterns of present networks, the results can be used to create realistic models of existing traffic sources. Such models are a key component of the analytic and simulation studies often undertaken in the design of future networks...

It is a significant problem to provide a robust and portable software environment that can link together clusters of workstations and other heterogeneous computers. There are particular difficulties when the computer clusters to be managed transcend administrative boundaries across wide-area networks. We review some of the technologies that have emerged recently for managing arbitrary computer ...

In a wide-area environment, the time required to obtain data from remote sources can vary unpredictably due to network congestion, link failure or other problems. Traditional techniques for query optimization and query execution do not cope well with such unpredictability. The static nature of those techniques prevents them from adapting to remote access delays that arise at runtime. In this pa...

Background traac models are fundamental to packet-level network simulation since the background traac impacts packet drop rates, queuing delays, end-to-end delay variation, and also determines available network bandwidth. In this paper, we present a statistical characterization of wide-area IP traac based on 90-minute traces taken from a week-long trace of packets exchanged between a large camp...

The rapid proliferation of widely-distributed data and document collections raises the need for wrapper/mediator archi-tectures that can handle the challenges of wide area query processing. Traditional query and search techniques do not scale to large numbers of repositories and cannot cope with the unpredictable performance and (un)availability of access to such repositories. Research at the U...

In this paper, we present a structure for monitoring a large set of computational clusters. We illustrate methods for scaling a monitor network comprised of many clusters while keeping processing requirements low. A design for presenting high-level web-based summaries of the monitor network is provided, along with a generalization to a distributed, multipleresolution monitoring tree. Emphasis i...

This paper considers the problem of establishing robust routes for user connection requests in an WDM network dynamically. The problem is to nd two edgedisjoint routes with satisfying certain given properties. One route will serve as the primary path, and another will serve as the backup path which will replace the primary path if there is any link failure in the primary path. Two versions of t...

Recent developments in networking technology cause a growing interest in connecting local-area clusters of workstations over wide-area links, creating multilevel clusters. Often, latency and bandwidth differences between local-area and wide-area network links are two orders of magnitude or more. With such a large difference, one would expect only very coarse grain applications to achieve good p...