Computer Science Journal (AGH University of Science and Technology, Krakow)
Not a member yet
476 research outputs found
Sort by
TOWARDS IMPLEMENTING VIRTUAL DATA INFRASTRUCTURES – A CASE STUDY WITH iRODS
Full text linkScientists demand easy-to-use, scalable and flexible infrastructures for sharing,managing and processing their data spread over multiple resources accessiblevia different technologies and interfaces. In our previous work, we developedthe conceptual framework VISPA for addressing these requirements. This paperprovides a case study assessing the integrated Rule-Oriented Data System(iRODS) for implementing the key concepts of VISPA. We found that iRODSis already well suited for handling metadata and sharing data. Although it doesnot directly support provenance information of data and the temporal provisioningof data, basic forms of these capabilities may be provided through itscustomization mechanisms, ie rules and micro-services
TRANSLATION OF USE CASE SCENARIOS TO JAVA CODE
Full text linkUse cases are usually treated as second class citizens in the software developmentchain based on models. Their textual descriptions (scenarios) are treatedas informal input to more formal design models that can then be (semi-)automatically transformed down to code. In this paper we will show that usecase scenarios can gain precise metamodel-based notation and semantics enablingautomatic processing. What is more, we will show transformation algorithmsthat can transform use case scenarios directly to dynamic code in Java.The presented transformation can generate the full structure of the system followingthe MVP architectural pattern, including complete method contents forthe application logic (Presenter) and presentation (View) layers. It also providesa code skeleton for the domain logic (Model) layer. The use case notation andthe transformation were implemented within a sophisticated tool suite. Basedon this, the paper discusses the evaluation efforts based on a case study
THE CC1 PROJECT – SYSTEM FOR PRIVATE CLOUD COMPUTING
Full text linkThe main features of the Cloud Computing system developed at IFJ PAN are described. The project is financed from the structural resources provided by the European Commission and the Polish Ministry of Science and Higher Education (Innovative Economy, National Cohesion Strategy). The system delivers a solution for carrying out computer calculations on a Private Cloud computing infrastructure. It consists of an intuitive Web based user interface, a module for the users and resources administration and the standard EC2 interface implementation. Thanks to the distributed character of the system it allows for the integration of a geographically distant federation of computer clusters within a uniform user environment
TOWARDS A GRID INFRASTRUCTURE FOR HYDRO-METEOROLOGICAL RESEARCH
Full text linkThe Distributed Research Infrastructure for Hydro-Meteorological Study (DRIHMS) is a coordinatedaction co-funded by the European Commission. DRIHMS analyzes the main issuesthat arise when designing and setting up a pan-European Grid-based e-Infrastructure for researchactivities in the hydrologic and meteorological fields. The main outcome of the projectis represented first by a set of Grid usage patterns to support innovative hydro-meteorologicalresearch activities, and second by the implications that such patterns define for a dedicatedGrid infrastructure and the respective Grid architecture
UPNP-BASED DISCOVERY AND MANAGEMENT OF HYPERVISORS AND VIRTUAL MACHINES
Full text linkThe paper introduces a Universal Plug and Play based discovery and management toolkitthat facilitates collaboration between cloud infrastructure providers and users. The presentedtools construct a unified hierarchy of devices and their management-related services, thatrepresents the current deployment of users’ (virtual) infrastructures in the provider’s (physical)infrastructure as well as the management interfaces of respective devices. The hierarchycan be used to enhance the capabilities of the provider’s infrastructure management system.To maintain user independence, the set of management operations exposed by a particulardevice is always defined by the device owner (either the provider or user)
Agent-Based Monitoring Using Fuzzy Logic and Rules
Full text linkIn this paper we present two solutions of monitoring automation for distributed systems. We develop this system to automate monitoring of distributes systems. Both solutions are aimed to monitor data storage and web services like web page servers. The first solution implemented in a system called Saude-Net, is an rule-based top level monitoring tool. In this system there are implemented rules which provide conditions which refer to one or more measured values. This system is able to choose the best action for an observed situation, e.g. a failure. It is possible to define more than one rule which relate to the same monitoring resource. The second concept presented in this paper refers to a fuzzy logic agent based approach to network monitoring. It is called SAMM compliant Agent. It is an extension to the Semantic-based Autonomous Monitoring and Management system (SAMM). On the one hand, it uses rules to define simple actions, based on a simple condition and an action description. On the other hand the main knowledge of this solution is defined by fuzzy logic. This system is able to manage and modify its knowledge to better fit to monitored resources. The knowledge in this concept is distributed among all the agents. The agents residing on a different hosts handle their parts of the knowledge and are capable to share/exchange them