Event Pattern Discovery in Multi-Cloud Service-Based Applications

2015 ◽  
Vol 5 (4) ◽  
pp. 78-103 ◽  
Author(s):  
Chrysostomos Zeginis ◽  
Kyriakos Kritikos ◽  
Dimitris Plexousakis
Keyword(s):  
Traffic Management ◽  
Service Oriented Architecture ◽  
Cloud Service ◽  
Service Level ◽  
Critical Event ◽  
Service Oriented ◽  
Application Deployment ◽  
And Performance ◽  
Multiple Clouds ◽  
Multi Cloud

The adoption of Cloud computing in the Service Oriented Architecture (SOA) world is continuously increasing. However, as developers try to optimize their application deployment cost and performance, they may also deploy application parts redundantly on different VMs. In such heterogeneous and distributed environments, it is important to have a clear view of the system's state and its components' interrelationships. This paper aims at proposing a novel monitoring and adaptation framework for Service-based Applications (SBAs) deployed on multiple Clouds. The main functionality of this framework is the discovery of critical event patterns within monitoring event streams, leading to specific Service Level Objective (SLO) violations. Furthermore, two main meta-models are proposed for describing the SBA's components and their dependencies, and the supported adaptation actions in a specific context respectively. The proposed approach is empirically evaluated based on a real-world traffic management application.

Architectural Strategies for Green Cloud Computing

2013 ◽  
pp. 218-242 ◽  
Author(s):  
P. Sasikala
Keyword(s):  
Cloud Computing ◽  
Service Oriented Architecture ◽  
Green Cloud Computing ◽  
Business Agility ◽  
Service Oriented ◽  
Application Deployment ◽  
Green Cloud ◽  
Self Service ◽  
And Performance ◽  
Cloud Network

Opportunities for improving IT efficiency and performance through centralization of resources have increased dramatically in the past few years with the maturation of technologies, such as service oriented architecture, virtualization, grid computing, and management automation. A natural outcome of this is what has become increasingly referred to as cloud computing, where a consumer of computational capabilities sets up or makes use of computing in the cloud network in a self service manner. Cloud computing is evolving, and enterprises are setting up cloud-like, centralized shared infrastructures with automated capacity adjustment that internal departmental customers utilize in a self service manner. Cloud computing promises to speed application deployment, increase innovation, and lower costs all while increasing business agility. This paper discusses the various architectural strategies for clean and green cloud computing. It suggests a variety of ways to take advantage of cloud applications and help identify key issues to figure out the best approach for research and business.

Testing Web Services in the Cloud

2012 ◽  
pp. 136-173 ◽  
Author(s):  
Harry M. Sneed
Keyword(s):  
Web Services ◽  
Service Oriented Architecture ◽  
Service Level Agreement ◽  
Cloud Service ◽  
Service Level ◽  
Cloud Services ◽  
Individual Development ◽  
Service Oriented ◽  
Actual Profile ◽  
Interface Definition

Cloud Computing makes it possible for users to access a wide range of web services in the public domain and to embed these global services in their local applications. This promises to save a significant amount of individual development cost. The biggest obstacle to using this technology is the problem of trust. To gain trust in the services offered they have to be extensively tested, either by the user himself or by a trusted agent. This chapter deals with the testing of web services in the cloud. There are many similarities to testing web services in a local service-oriented architecture, but there are also significant differences. In a company specific SOA, testers can gain access to the source. This is not true of the cloud. There is no possibility of accessing the source. Therefore, testers must rely solely on the specification contained in the service level agreement – SLA – and the web service interface definition – WSDL or REST – to base their test upon. Testing in the cloud is strictly a black-box test. The goal of a cloud service test is also not to find errors but to assess the suitability of the service to the purpose of the user. It may be necessary to test several services in order to find that one best suited to the requirements of the user. To judge suitability it is necessary to define an ideal usage profile, including performance, security and other non-functional criteria, and to compare that with the actual profile of each potential service. For this both static and dynamic analysis methods must be applied. The chapter presents an automated approach to assessing cloud services and selecting that one most suitable to the user’s application.

scholarly journals A Multiserver User-space Unikernel for a Distributed Virtualization System

2019 ◽  
Author(s):  
Pablo Pessolani
Keyword(s):  
Service Oriented Architecture ◽  
Virtual Machines ◽  
Management Tools ◽  
Resource Requirements ◽  
Service Oriented ◽  
Small Footprint ◽  
Memory Network ◽  
User Space ◽  
Attack Surface ◽  
And Performance

Nowadays, most Cloud applications are developed using Service Oriented Architecture (SOA) or MicroService Architecture (MSA). The scalability and performance of them is achieved by executing multiple instances of its components in different nodes of a virtualization cluster. Initially, they were deployed in Virtual Machines (VMs) but, they required enough computational, memory, network and storage resources to hold an Operating System (OS), a set of utilities, libraries, and the application component. By deploying hundreds of these application components, the resource requirements increase a lot. To minimize them, usually small footprint OS are used. Later, as management tools were improved, the application components began to be deployed in Containers which require even less resources than VMs. Another way to reduce the resource requirements is integrating the application components in a Unikernel. This article proposes a Unikernel called MUK, based on a multiserver OS, to be used as a tool to integrate Cloud application components. MUK was built to run in user-space inside a Container of a Distributed Virtualization System. Both technologies facilitate the scattering of application components in a virtualization cluster keeping the isolation properties and minimal attack surface of a Unikernel.

scholarly journals Service-Oriented Architecture of E-Government: Characteristics of the Anglo-American Model and Peculiarities of its Implementation in Ukraine

2020 ◽  
Vol 47 (4) ◽  
pp. 39-48
Author(s):  
Andrii NAKONECHNYI ◽  
Natalia KOLISNICHENKO
Keyword(s):  
Local Governments ◽  
Service Oriented Architecture ◽  
Financial Burden ◽  
Service Level ◽  
Legal Framework ◽  
The Internet ◽  
Semantic Level ◽  
American Model ◽  
Service Oriented ◽  
Anglo American

In the paper the advantages of the service-oriented architecture of e-government and its prospects for Ukraine are revealed. Service-oriented e-government is governed by a service-oriented architecture. Service-oriented architecture is the functionality of software as services aiming to establish compatibility in their provision. The model of service-oriented e-government architecture is divided into five layers (levels), arranged from bottom to top: operational level, semantic level, service level, process level, presentation level. The practice of service-oriented e-government in foreign countries is studies: USA, Canada, and Great Britain. These countries implement the so-called Anglo-American model of informatization of the state, which is based on: removal of redundant functions of government, delivery of public services to citizens, meeting the needs of citizens through information technology. This model promotes the development of transactions, payment for services via the Internet. Foreign experience shows that a key feature of government activities is to ensure the success of the implemented actions, as well as to control the quality and scope of services. Therefore, when developing e-government projects, the governments take their efforts to get the corresponding positive consequences in the availability of services: providing quality services to citizens and businesses; increasing revenues; easing the financial burden on federal and local governments, primarily by reducing documents and electronic services on the Internet. The trends of the model implementation in Ukraine are studies. The evolution of the issue included the Program «Electronic Ukraine», the realization of the E-Government Information System. The further steps are analyzed based on the information from the official website of the Ministry of Digital Transformation of Ukraine which provides the cases of service-oriented state (Popular services). The projects of the Ministry on Digital State digitize many services, update their legal framework, streamline the activity of state registers, and provide technical capabilities and data protection. It is concluded that service-oriented architecture of e-government is characterized by the features of its implementation based on such principles as: information-centric approach; the principle of a common platform, which focuses on creating an open information environment and common technological infrastructure for more effective collaboration of all participants and users of e-government; the principle of user orientation (all e-government activities are aimed at meeting the needs of service consumers); the principle of security and confidentiality.

A Service Oriented SLA Management Framework for Grid Environments

2012 ◽  
pp. 45-61
Author(s):  
V. Pouli ◽  
C. Marinos ◽  
M. Grammatikou ◽  
S. Papavassiliou ◽  
V. Maglaris
Keyword(s):  
Web Service ◽  
Service Providers ◽  
Service Level ◽  
Service Availability ◽  
Management Framework ◽  
Qos Guarantees ◽  
Grid Environments ◽  
Monitoring Procedure ◽  
Service Oriented ◽  
And Performance

Traditionally, network Service Providers specify Service Level Agreements (SLAs) to guarantee service availability and performance to their customers. However, these SLAs are rather static and span a single provider domain. Thus, they are not applicable to a multi–domain environment. In this paper, the authors present a framework for automatic creation and management of SLAs in a multi-domain environment. The framework is based on Service Oriented Computing (SOC) and contains a collection of web service calls and modules that allow for the automatic creation, configuration, and delivery of an end-to-end SLA, created from the merging of the per-domain SLAs. This paper also presents a monitoring procedure to monitor the QoS guarantees stipulated in the SLA. The SLA establishment and monitoring procedures are tested through a Grid application scenario targeted to perform remote control and monitoring of instrument elements distributed across the Grid.

Applying Service Oriented Architecture and Cloud Computing for a Greener Traffic Management

2011 ◽  
pp. 678-693
Author(s):  
Ishan Bhalla ◽  
Kamlesh Chaudhary
Keyword(s):  
Cloud Computing ◽  
Traffic Management ◽  
Management System ◽  
Carbon Emission ◽  
Service Oriented Architecture ◽  
Heavy Traffic ◽  
Wireless Data ◽  
Service Oriented ◽  
Traffic Management System ◽  
It Application

Traffic Management System (TMS) is a possible implementation of a Green IT application. It can have direct impact on reducing the greenhouse gases. The focus of this report is to illustrate how event driven SOA design principles can be applied in designing traffic management system. It also discusses how cloud computing concept can be used for TMS application. Traffic during peak hours is a problem in any major city where population growth far exceeds the infrastructure. Frequent stop and start of the cars on the heavy traffic roads and slow moving traffic causes greater fuel consumption, which results in greater emission of carbon gases. If efficient traffic management system can speed up the traffic average speed it will help reduce the carbon emission. As the WiMAX technology reaches maturity and achieves greater reliability and speed for wireless data transmissions new mobile applications are possible. Traffic Management System is one such example. WiMAX can facilitate communication to and from fast moving cars. WiMAX combined with GPS (Global Positioning System) technology can facilitate building an efficient traffic management system. The authors have also discussed various scenarios where Cloud computing technology can be utilised resulting in further optimisation of the computing resources and therefore reducing the carbon emission.

Towards Automated SLA Management for Service Delivery in SOA-based Environments

2016 ◽  
Vol 7 (1) ◽  
pp. 26-40
Author(s):  
Elarbi Badidi ◽  
Mohamed El Koutbi
Keyword(s):  
Service Oriented Architecture ◽  
Service Providers ◽  
Service Level ◽  
Third Party ◽  
Handheld Devices ◽  
Service Provisioning ◽  
Functional Requirements ◽  
Business Goals ◽  
Sla Negotiation ◽  
Service Oriented

The services landscape is changing with the growing adoption by businesses of the Service Oriented Architecture (SOA), the migration of business solutions to the cloud, and the proliferation of smartphones and Internet-enabled handheld devices to consume services. To meet their business goals, organizations increasingly demand services, which can satisfy their functional and non-functional requirements. Service Level Agreements (SLAs) are seen as the means to guarantee the continuity in service provisioning and required levels of service. In this paper, we propose a framework for service provisioning, which aims at providing support for automated SLA negotiation and management. The Service Broker component carries out SLA negotiation with selected service-providers on behalf of service-consumers. Multi-rounds of negotiations are very often required to reach an agreement. In each round, the negotiating parties bargain on multiple SLA parameters by trying to maximize their global utility functions. The monitoring infrastructure is in charge of observing SLA compliance monitoring using measurements obtained from independent third party monitoring services.

Building Highly Dependable Wireless Web Services

2010 ◽  
Vol 8 (4) ◽  
pp. 1-16 ◽  
Author(s):  
Wenbing Zhao
Keyword(s):  
Web Services ◽  
Service Oriented Architecture ◽  
State Of The Art ◽  
Mobile Business ◽  
Business Transactions ◽  
High Dependability ◽  
Service Oriented ◽  
And Performance ◽  
Wireless Mobile ◽  
The Web

In this paper, the authors introduce Web services technology and its applications to mobile business transactions. This paper shows that the Web services technology is a powerful tool to build next-generation e-Commerce applications for wireless mobile devices following the service-oriented architecture. Such an approach would bring significant benefits to organizations involved with e-Commerce. The authors further discuss the importance of ensuring high dependability of Web services and provide a literature review of state-of-the-art techniques that are critical to the implementation of practical and dependable wireless Web services. Finally, research on the design, implementation, and performance evaluation of a fault tolerance framework for wireless Web services are described.

Design of Quality Aspects in Service Oriented Architecture through Service Level Agreements

2011 ◽  
pp. 1-21
Author(s):  
Marco Massarelli ◽  
Claudia Raibulet ◽  
Daniele Cammareri ◽  
Nicolò Perino
Keyword(s):  
Service Oriented Architecture ◽  
Service Level ◽  
Application Domain ◽  
Service Level Agreements ◽  
Actual Case ◽  
Service Oriented Architectures ◽  
Quality Aspects ◽  
Service Oriented

This chapter gives a solution to design Service Oriented Architectures which defines and manages Service Level Agreements to enforce Quality of Services and achieves adaptivity at runtime. The validation of this proposed approach is performed through an actual case study in the context of the multimedia application domain.

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