Energy-QoS Tradeoffs in J2EE Hosting Centers

International audienceNowadays, hosting centres are widely used to host various kinds of applications e.g., web servers or scientific applications. Resource management is a major challenge for most organisations that run these infrastructures. Many studies show that clusters are not used at their full capacity which represents a significant source of waste. Autonomic management systems have been introduced in order to dynamically adapt software infrastructures according to runtime conditions. They provide support to deploy, configure, monitor, and repair applications in such environments. In this paper, we report our experiments in using an autonomic management system to provide resource aware management for a clustered application. We consider a standard replicated server infrastructure in which we dynamically adapt the degree of replication in order to ensure a given QoS while minimising energy consumption

Component-based control system development for agile manufacturing machine systems

It is now a common sense that manufactures including machine suppliers and system integrators of the 21 st century will need to compete on global marketplaces, which are frequently shifting and fragmenting, with new technologies continuously emerging. Future production machines and manufacturing systems need to offer the "agility" required in providing responsiveness to product changes and the ability to reconfigure. The primary aim for this research is to advance studies in machine control system design, in the context of the European project VIR-ENG - "Integrated Design, Simulation and Distributed Control of Agile Modular Machinery"

Reference ontologies to support the development of global production network systems

In competitive and time sensitive market places, organisations are tasked with providing product lifecycle management (PLM) approaches to achieve and maintain competitive advantage, react to change and understand the balance of possible options when making decisions on complex multi-faceted problems, global production networks (GPN) is one such domain in which this applies. When designing and configuring GPN to develop, manufacture and deliver product–service provision, information requirements that affect decision making become more complex. The application of reference ontologies to a domain and its related information requirements can enhance and accelerate the development of new product-service systems with a view towards the seamless interchange of information or interoperability between systems and domains. This paper presents (i) preliminary results for the capture and modelling of end-user information, (ii) an initial higher level reference core ontology for the development of reference ontologies and (iii) the formal logical modelling of Level 1 of the FLEXINET reference ontology using a Common Logic based approach

Autonomic Systems

An autonomic system is defined as self-configuring, self-optimizing, self-healing, and self-protecting. We implemented the Autonomic Cluster Management System (ACMS), a low overhead Java application designed to manage and load balance a cluster, while working at NASA GSFC. The ACMS is a mobile multi-agent system in which each agent is designed to fulfill a specific role. The agents collaborate and coordinate their activities in order to achieve system management goals. The ACMS is scalable and extensible to facilitate future development

UXP Portal 2.0 Functional Requirements Specification

Cybernetica on välja töötanud toote Unified eXchange Platform (UXP), pakkumaks turvalist ja töökindlat organisatsioonidevahelist andmevahetuskihti. UXP Portal on universaalne klientrakendus üle UXP platvormi pakutavate teenuste tarbimiseks. UXP Portal’i esimese versiooni põhjal tehtud järeldused viisid vajaduseni arendada välja versioon 2.0.Käesolev bakalaureusetöö kirjeldab UXP Portal 2.0 arendusprotsessi käigusvalminud äriprotsesside modelleerimise ja funktsionaalsete nõuete spetsifitseerimise tööprotsessi ja tulemusi. Projekti tarkvaraarendusprotsessi aluseks on Rational Unified Process (RUP). Projekti raames valminud skeemid järgivad unifitseeritud modelleerimiskeele (UML) põhimõtteid. Nii talitluse kui ka süsteemi käitumise kirjeldamiseks on kasutatud kasutusmallimudeleid. Valminud kasutusmallimudelid on sisendiks arendusprotsessi järgnevatele tööülesannetele.Nõuete spetsifitseerimise muutis keeruliseks tõsiasi, et UXP Portalit arendatakse ettevõtte oma tootena ehk puudub konkreetne klient, kellega koostöös nõudeid välja selgitada. Sellest hoolimata võib välise interaktsioonidisaineriga toimunud koostöö põhjal hinnata, et funktsionaalsete nõuete spetsifikatsioon oli piisava detailsusastmega koostöö alustamiseks.Cybernetica has developed the Unified eXchange Platform (UXP) — an interoperability platform designed to serve as a secure and reliable data exchange infrastructure.UXP Portal is a component that serves as a universal client applicationfor accessing services over UXP infrastructure. Experience with the initial version of UXP Portal led to the development of version 2.0.This Thesis describes the process and the outputs of business process modelingand functional requirements specification for the development of UXP Portal 2.0.The development process is based on the Rational Unified Process (RUP). Themodels were created using Unified Modeling Language (UML) notation. Use-Case Models were developed for both the business and system level domains. The Use- Case Models will serve as an input for the implementation tasks.The requirements specification process was complicated by the fact that UXPPortal is developed as a product that has no direct customer to elicit requirements from. However, the requirements specification described in this Thesis proved to be sufficient for designing a user interface prototype in cooperation with an external interaction designer