Learn More
SUMMARY The last decade has seen a substantial increase in commodity computer and network performance, mainly as a result of faster hardware and more sophisticated software. Nevertheless, there are still problems, in the fields of science, engineering, and business, which cannot be effectively dealt with using the current generation of supercomputers. In(More)
Autonomic management can be used to improve the QoS provided by parallel/distributed applications. We discuss behavioural skeletons introduced in earlier work: rather than relying on programmer ability to design " from scratch " efficient autonomic policies, we encapsulate general autonomic controller features into algorithmic skeletons. Then we leave to(More)
Distributed high-performance computing|so-called metacomputing|refers to the coordinated use of a pool of geographically distributed high-performance computers. The user's view of an ideal metacomputer is that of a powerful monolithic virtual machine. The imple-mentor's view, on the other hand, is that of a variety of interacting services implemented in a(More)
We present a novel strategy to partition a document collection onto several servers and to perform effective collection selection. The method is based on the analysis of query logs. We proposed a novel document representation called <i>query-vectors</i> model. Each document is represented as a list recording the queries for which the document itself is a(More)
We present behavioural skeletons for the CoreGRID Component Model, which are an abstraction aimed at simplifying the development of GCM-based self-management applications. Behavioural skeletons abstract component self-man-agent in component-based design as design patterns abstract class design in classic OO development. As here we just wish to introduce the(More)
This paper presents AssistConf, a graphical user interface designed to configure an ASSIST program and to run it on a Grid platform. ASSIST (A Software development System based upon Integrated Skeleton Technology) is a new programming environment for the development of parallel and distributed high-performance applications. The main goals of ASSIST are(More)
—We describe the main architecture and the design principles of the Service/Resource Discovery System (SRDS), a component of the XtreemOS Operating System. XtreemOS is a Linux extension that enables management and exploitation as single platform of computational resources provided by federated Virtual Organizations. The SRDS provides scalable and(More)