A FUNCTIONAL SKETCH FOR RESOURCES MANAGEMENT IN COLLABORATIVE SYSTEMS FOR BUSINESS

This paper presents a functional design sketch for the resource management module of a highly scalable collaborative system. Small and medium enterprises require such tools in order to benefit from and develop innovative business ideas and technologies. As computing power is a modern increasing demand and no easy and cheap solutions are defined, especially small companies or emerging business projects abide a more accessible alternative. Our work targets to settle a model for how P2P architecture can be used as infrastructure for a collaborative system that delivers resource access services. We are focused on finding a workable collaborative strategy between peers so that the system offers a cheap, trustable and quality service. Thus, in this phase we are not concerned about solutions for a specific type of task to be executed by peers, but only considering CPU power as resource. This work concerns the resource management module as a part of a larger project in which we aim to build a collaborative system for businesses with important resource demandsresource management, p2p, open-systems, service oriented computing, collaborative systems

Applications, tools and techniques on the road to exascale computing

This volume of the book series “Advances in Parallel Computing” contains the proceedings of ParCo2011, the 14th biennial ParCo Conference, held from 31 August to 3 September 2011, in Ghent, Belgium. In an era when physical limitations have slowed down advances in the performance of single processing units, and new scientific challenges require exascale speed, parallel processing has gained momentum as a key gateway to HPC (High Performance Computing). Historically, the ParCo conferences have focused on three main themes: Algorithms, Architectures (both hardware and software) and Applications. Nowadays, the scenery has changed from traditional multiprocessor topologies to heterogeneous manycores, incorporating standard CPUs, GPUs (Graphics Processing Units) and FPGAs (Field Programmable Gate Arrays). These platforms are, at a higher abstraction level, integrated in clusters, grids, and clouds. This is reflected in the papers presented at the conference and the contributions as included in these proceedings. An increasing number of new algorithms are optimized for heterogeneous platforms and performance tuning is targeting extreme scale computing. Heterogeneous platforms utilising the compute power and energy efficiency of GPGPUs (General Purpose GPUs) are clearly becoming mainstream HPC systems for a large number of applications in a wide spectrum of application areas. These systems excel in areas such as complex system simulation, real-time image processing and visualisation, etc. High performance computing accelerators may well become the cornerstone of exascale computing applications such as 3-D turbulent combustion flows, nuclear energy simulations, brain research, financial and geophysical modelling. The exploration of new architectures, programming tools and techniques was evidenced by the mini-symposia “Parallel Computing with FPGAs” and “Exascale Programming Models”. The need for exascale hardware and software was also stressed in the industrial session, with contributions from Cray and the European exascale software initiative. Our sincere appreciation goes to the keynote speakers who gave their perspectives on the impact of parallel computing today and the road to exascale computing tomorrow. Our heartfelt thanks go to the authors for their valuable scientific contributions and to the programme committee who reviewed the papers and provided constructive remarks. The international audience was inspired by the quality of the presentations. The attendance and interaction was high and the conference has been an agora where many fruitful ideas were exchanged and explored. We wish to express our sincere thanks to the organizers for the smooth operation of the conference. The University conference centre Het Pand offered an excellent environment for the conference as it allowed delegates to interact informally and easily. A special word of thanks is due to the management and support staff of Het Pand for their proficient and friendly support. The organizers managed to put together an extensive social programme. This included a reception at the medieval Town Hall of Ghent as well as a memorable conference dinner. These social events stimulated interaction amongst delegates and resulted in many new contacts being made. Finally we wish to thank all the many supporters who assisted in the organization and successful running of the event. Erik D'Hollander, Ghent University, Belgium Koen De Bosschere, Ghent University, Belgium Gerhard R. Joubert, TU Clausthal, Germany David Padua, University of Illinois, USA Frans Peters, Philips Research, Netherland

Survey and Analysis of Production Distributed Computing Infrastructures

This report has two objectives. First, we describe a set of the production distributed infrastructures currently available, so that the reader has a basic understanding of them. This includes explaining why each infrastructure was created and made available and how it has succeeded and failed. The set is not complete, but we believe it is representative. Second, we describe the infrastructures in terms of their use, which is a combination of how they were designed to be used and how users have found ways to use them. Applications are often designed and created with specific infrastructures in mind, with both an appreciation of the existing capabilities provided by those infrastructures and an anticipation of their future capabilities. Here, the infrastructures we discuss were often designed and created with specific applications in mind, or at least specific types of applications. The reader should understand how the interplay between the infrastructure providers and the users leads to such usages, which we call usage modalities. These usage modalities are really abstractions that exist between the infrastructures and the applications; they influence the infrastructures by representing the applications, and they influence the ap- plications by representing the infrastructures

Data Management in the APPA System

International audienceCombining Grid and P2P technologies can be exploited to provide high-level data sharing in large-scale distributed environments. However, this combination must deal with two hard problems: the scale of the network and the dynamic behavior of the nodes. In this paper, we present our solution in APPA (Atlas Peer-to-Peer Architecture), a data management system with high-level services for building large-scale distributed applications. We focus on data availability and data discovery which are two main requirements for implementing large-scale Grids. We have validated APPA's services through a combination of experimentation over Grid5000, which is a very large Grid experimental platform, and simulation using SimJava. The results show very good performance in terms of communication cost and response time

Policy-driven Security Management for Gateway-Oriented Reconfigurable Ecosystems

abstract: With the increasing user demand for low latency, elastic provisioning of computing resources coupled with ubiquitous and on-demand access to real-time data, cloud computing has emerged as a popular computing paradigm to meet growing user demands. However, with the introduction and rising use of wear- able technology and evolving uses of smart-phones, the concept of Internet of Things (IoT) has become a prevailing notion in the currently growing technology industry. Cisco Inc. has projected a data creation of approximately 403 Zetabytes (ZB) by 2018. The combination of bringing benign devices and connecting them to the web has resulted in exploding service and data aggregation requirements, thus requiring a new and innovative computing platform. This platform should have the capability to provide robust real-time data analytics and resource provisioning to clients, such as IoT users, on-demand. Such a computation model would need to function at the edge-of-the-network, forming a bridge between the large cloud data centers and the distributed connected devices. This research expands on the notion of bringing computational power to the edge- of-the-network, and then integrating it with the cloud computing paradigm whilst providing services to diverse IoT-based applications. This expansion is achieved through the establishment of a new computing model that serves as a platform for IoT-based devices to communicate with services in real-time. We name this paradigm as Gateway-Oriented Reconfigurable Ecosystem (GORE) computing. Finally, this thesis proposes and discusses the development of a policy management framework for accommodating our proposed computational paradigm. The policy framework is designed to serve both the hosted applications and the GORE paradigm by enabling them to function more efficiently. The goal of the framework is to ensure uninterrupted communication and service delivery between users and their applications.Dissertation/ThesisMasters Thesis Computer Science 201

Interim research assessment 2003-2005 - Computer Science

This report primarily serves as a source of information for the 2007 Interim Research Assessment Committee for Computer Science at the three technical universities in the Netherlands. The report also provides information for others interested in our research activities

Structured P2P Technologies for Distributed Command and Control

The utility of Peer-to-Peer (P2P) systems extends far beyond traditional file sharing. This paper provides an overview of how P2P systems are capable of providing robust command and control for Distributed Multi-Agent Systems (DMASs). Specifically, this article presents the evolution of P2P architectures to date by discussing supporting technologies and applicability of each generation of P2P systems. It provides a detailed survey of fundamental design approaches found in modern large-scale P2P systems highlighting design considerations for building and deploying scalable P2P applications. The survey includes unstructured P2P systems, content retrieval systems, communications structured P2P systems, flat structured P2P systems and finally Hierarchical Peer-to-Peer (HP2P) overlays. It concludes with a presentation of design tradeoffs and opportunities for future research into P2P overlay systems