Browsing by Subject "service-oriented architecture"

Now showing 1 - 3 of 3

Access status: Open Access ,
An evolution process for service-oriented systems
(Wydawnictwa AGH, 2012) Zalewski, Andrzej; Szlenk, Marcin; Kijas, Szymon
Evolution of service-oriented systems is quite a new research area, which becomes more and more important as engineering challenges move from enabling service-orientation onto the maintenance and evolution of already developed service-oriented systems. However, the development of suitable evolution processes and methodologies is still an open research problem. The evolution process presented in this paper has been designed to address the evolution of service-oriented systems, which are technically built out of a set of service compositions. The presented process comprises phases and tasks compliant with ISO 20000. The underlying model of service-oriented system consisting of business processes and corresponding service composition models has also been presented. A traceability model and tools supporting change impact analysis have also been provisioned for. Preliminary industrial validation indicates that the evolution process should be easy to adapt by the industry.
Access status: Open Access ,
Public cloud computing for software as a service platforms
(Wydawnictwa AGH, 2014) Soboń, Michał; Nawrocki, Piotr
As cloud computing becomes increasingly popular among enterprises, organizations, and developers, it is time to consider how Software as a Service solutions can be built rapidly and cost-effectively. This paper presents the possibility of using a service-based architecture operating within the framework of the public cloud computing model and implementing Software as a Service. It also descri- bes the architecture, implementation, and testing of sample applications. The conclusions drawn, with respect to related work and the results obtained, shed more light on the application of public cloud systems for Software as a Service purposes.
Access status: Open Access ,
SLA-based job submission and scheduling with the Globus Toolkit 4
(Wydawnictwa AGH, 2012) Tenschert, Axel; Kübert, Roland
High performance computing is nowadays mostly performed in a best effort fashion. This is surprising as the closely related topic of grid computing, which deals with the federation of resources from multiple domains in order to support large jobs, and cloud computing, which promises seemingly infinite amounts of compute and storage, both offer quality of service (QoS), albeit in different ways. Long-term service level agreements (SLAs), which require the establishment of SLAs long in advance of their actual usage, seem a promising way for the offering of QoS guarantees in an HPC environment in a way that is not disruptive to the business models employed today. This work uses the long-term SLA approach as a basis for the provisioning of service levels for HPC resources and presents an SLA management framework to support this. Flexibility is provided by providing SLAs with different service levels, support for which is integrated into job submission and scheduling. The SLA management framework can, on a high level, be used in a generic fashion and an implementation is presented that is evaluated against a motivating scenario.