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A Cloud is a very dynamic environment where resources offered by a Cloud Service Provider (CSP), out of one or more Cloud Data Centers (DCs) are acquired or released (by an enterprise (tenant) on-demand and at any scale. Typically a tenant will use Cloud service interfaces to acquire or release resources directly. This process can be automated by a CSP by(More)
The purpose of a network management system is to provide smooth functioning of a large heterogeneous network through monitoring and controlling of network behavior. ISO/OSI has deened six management functionalities that aid in overall management of a network: connguration, fault, performance, security, directory and accounting management. These management(More)
Current W orld Wide Web browsers, e.g., Mosaic and Netscape, support users primarily in the task of browsing the Internet. In some situations , users want to explore topics for which relevant information may reside both on a large local database and on the Web. The Mul-tiSurf project seeks to deal with these situations by i n tegrating text browsing of a(More)
The Hy + system is a generic visualization tool that supports a novel visual query language called GraphLog. In Hy + , visualizations are based on a graphical formalism that allows comprehensible representations of databases, queries, and query answers to be interactively manipulated. This paper describes the design, architecture and features of Hy + with a(More)
The complexity of managing and controlling large heterogeneous networks requires the availability of management stations equipped with sophisticated tools. A fundamental feature of an advanced network management station is the capability to present to the human manager a comprehensible picture of the relevant scenarios. The tools present at the station must(More)
In this paper, we present visualizations of parts of the network of documents comprising the World Wide Web. We describe how we are using the Hy<supscrpt>+</supscrpt> visualization system to visualize the portion of the World Wide Web explored during a browsing session. As the user browses, the web browser communicates the URL and title of each document(More)
A programmer attempting to understand and debug a distributed program deals with large volumes of trace data that describe the program's behaviour. Visualization is widely believed to help in this and similar tasks. We contend that visualization is indeed useful, but only if accompanied of powerful data management facilities to support abstraction and(More)
The complexity of managing and controlling large heterogeneous networks requires the availability of management stations equipped with sophisticated tools. A fundamental feature of an advanced network management station is the capability to present to the human manager a comprehensible picture of the relevant scenarios. The tools present at the station must(More)