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Service-oriented architecture

Service-oriented architecture
See also the client-server model, a progenitor concept A Service-Oriented Architecture (SOA) is a design pattern in which software/application components provide services to other software/application components via a protocol, typically over a network and in a loosely-coupled way. The principles of service-orientation are independent of any vendor, product or technology.[1] A service is a self-contained unit of functionality, such as retrieving an online bank statement.[2] By that definition, a service is a discretely invokable operation. However, in the Web Services Definition Language (WSDL), a service is an interface definition that may list several discrete services/operations. And elsewhere, the term service is used for a component that is encapsulated behind an interface. Services can be combined to provide the complete functionality of a large software application.[3] A SOA makes it easier for software components on computers connected over a network to cooperate. Overview[edit]

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An Overview of VMware ESX Server Architecture ESX server is a virtualization platform, and a flagship enterprise by VMware. Usually, this is available in two versions – ESXi server and ESX server. Basically ESX server is an enterprise level virtualization tool. It makes use of different services which manage multiple virtual machines. Software Product Lines A software product line (SPL) is a set of software-intensive systems that share a common, managed set of features satisfying the specific needs of a particular market segment or mission and that are developed from a common set of core assets in a prescribed way. Software product lines are emerging as a viable and important development paradigm allowing companies to realize order-of-magnitude improvements in time to market, cost, productivity, quality, and other business drivers. Software product line engineering can also enable rapid market entry and flexible response, and provide a capability for mass customization.

Service-oriented modeling and architecture Introduction There has been a lot of buzz and hype -- some factual, some not so well-founded -- surrounding the opportunities presented by Service-oriented Architectures (SOA) and its implementation as Web services. Analysts have predicted, pundits have professed, professors have lectured, companies have scurried to sell what they had, as SOA products -- often missing the point that SOA is not a product. It’s about bridging the gap between business and IT through a set of business-aligned IT services using a set of design principles, patterns, and techniques. ZDNet recently said, "Gartner predicts that by 2008, more than 60 percent of enterprises will use SOA as a "guiding principle" when creating mission-critical applications and processes."

Web service A Web service is a method of communications between two electronic devices over a network. It is a software function provided at a network address over the web with the service always on as in the concept of utility computing. The W3C defines a Web service as: a software system designed to support interoperable machine-to-machine interaction over a network. Chapter 1: Service Oriented Architecture (SOA) “SOAs are like snowflakes – no two are alike.” - David Linthicum Consultant Block vs file level storage, VMware VMFS, NTFS and some of the protocols involved. During the past few months I have spend a considerable amount of time looking at various storage related topics. Among others I discussed Web Scale technology as part of converged and software defined architectures, with Nutanix being one of the main vendors, next I also took a, somewhat, deeper dive into the wondrous world of IOPS where I talked about some of their characteristics and ways to potentially enhance performance and the end user experience, which are still two of the main concerns when dealing with these bad boys. Throughout this article I want to take a closer look at some of the differences between block vs file level storage, the accompanying file systems, the different protocols used, potential block sizes and some of the characteristics of VMware VMFS in particular. Key components DAS, SAN, NAS, converged

Baby Steps to SOA – Step One: Analyze and Plan In the continuing Baby Steps to SOA series, we follow Doug and his IT team behind as they take steps to renovate their digital asset architecture. Previously, we introduced the problem and the team, and now we start on our travel through the road map. The Evolutionary Roadmap Service-level agreement A service-level agreement (SLA) is a part of a service contract[disambiguation needed] where a service is formally defined. In practice, the term SLA is sometimes used to refer to the contracted delivery time (of the service or performance). As an example, Internet service providers and telcos will commonly include service level agreements within the terms of their contracts with customers to define the level(s) of service being sold in plain language terms.

What Is Windows Communication Foundation Windows Communication Foundation (WCF) is a framework for building service-oriented applications. Using WCF, you can send data as asynchronous messages from one service endpoint to another. A service endpoint can be part of a continuously available service hosted by IIS, or it can be a service hosted in an application. Getting Started with Hyper-Converged Storage What's yours is mine: Sharing DCIM Maximize the potential of DCIM tools by bringing facilities and IT together. Read Now Schneider Electric Delivers StruxureWare™ for Data Centers This essential resource explores the top IT and business drivers for data centre infrastructure management (DCIM) software, definitions of DCIM, how it can solve data centre challenges, and presents the main benefits of DCIM. Read Now Expert best practices for data center management This expert e-guide offers information on how data center infrastructure management tools can benefit your organization. It also offers information on how to overcome the limitations of DCIM. Access now to gain insight into topics like:using DCIM tools for energy management, DCIM challenges and limitations and more. Read Now Figure Out if Your Data Center Measures Up Data center infrastructure management tools provide insight into an organization's facility and IT resources.

Conceptual model (computer science) This is often used for defining different processes in a particular Company or Institute. Fowler, Martin: Analysis Patterns, Reusable object models, Addison-Wesley Longman, 1997. ISBN 0-201-89542-0.Stewart Robinson, Roger Brooks, Kathy Kotiadis, and Durk-Jouke Van Der Zee (Eds.): Conceptual Modeling for Discrete-Event Simulation, 2010. The 9 Principles Of Soa Design Service-oriented Architecture (SOA) is as simple as can be. There are 9 design principles to keep in mind when designing a SOA service: 1. Web Services Interoperability It is governed by a Board of Directors consisting of the founding members (IBM, Microsoft, BEA Systems, SAP, Oracle, Fujitsu, Hewlett-Packard, and Intel) and two elected members (currently, Sun Microsystems and webMethods). Since joining OASIS, other organizations have joined the WS-I technical committee including CA Technologies, JumpSoft and Booz Allen Hamilton. The organization's deliverables include profiles, sample applications that demonstrate the profiles' use, and test tools to help determine profile conformance.

Web Service Definition Language (WSDL) Abstract WSDL is an XML format for describing network services as a set of endpoints operating on messages containing either document-oriented or procedure-oriented information. The operations and messages are described abstractly, and then bound to a concrete network protocol and message format to define an endpoint. Related concrete endpoints are combined into abstract endpoints (services).

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