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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]

http://en.wikipedia.org/wiki/Service-oriented_architecture

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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. Virtual machine A virtual machine (VM) is a software-based emulation of a computer. Virtual machines operate based on the computer architecture and functions of a real or hypothetical computer. Definitions[edit] A virtual machine (VM) is a software implementation of a machine (e.g., a computer) that executes programs like a physical machine. Virtual machines are separated into two major classifications, based on their use and degree of correspondence to any real machine: A VM was originally defined by Popek and Goldberg as "an efficient, isolated duplicate of a real machine".

OASIS SOA Reference Model A reference model in systems, enterprise, and software engineering is an abstract framework for understanding significant relationships among the entities of some environment, and for the development of consistent standards or specifications supporting that environment. A reference model is based on a small number of unifying concepts and may be used as a basis for education and explaining standards to a non-specialist. A reference model is not directly tied to any standards, technologies or other concrete implementation details, but it does seek to provide a common semantics that can be used unambiguously across and between different implementations.

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

Software as a service According to a Gartner Group estimate, SaaS sales in 2010 reached $10 billion, and were projected to increase to $12.1bn in 2011, up 20.7% from 2010.[6] Gartner Group estimates that SaaS revenue will be more than double its 2010 numbers by 2015 and reach a projected $21.3bn. Customer relationship management (CRM) continues to be the largest market for SaaS. SaaS revenue within the CRM market was forecast to reach $3.8bn in 2011, up from $3.2bn in 2010.[7] Open SOA Collaboration Last month an alliance of leading vendors announced progress on specifications to define a language-neutral programming model for application development in SOA environments. They call this specification Open SOA Collaboration. In essence, they are proposing a new standard to create and manage IT, making the process of integrating different third-party SOA technologies "less onerous," they say. Or, we can call this a standard way of delivering services, making it easier to work and play well together.

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.

Cloud computing Cloud computing metaphor: For a user, the network elements representing the provider-rendered services are invisible, as if obscured by a cloud. Cloud computing is a computing term or metaphor that evolved in the late 1990s, based on utility and consumption of computer resources. Cloud computing involves application systems which are executed within the cloud and operated through internet enabled devices. Purely cloud computing does not rely on the use of cloud storage as it will be removed upon users download action. OASIS (organization) The Organization for the Advancement of Structured Information Standards (OASIS) is a global consortium that drives the development, convergence, and adoption of e-business and web service standards. With its headquarters in the United States, members of the consortium decide how and what work is undertaken through an open, democratic process.[1] Technical work is being carried out under the following categories: Web Services, e-Commerce, Security, Law & Government, Supply Chain, Computing Management, Application Focus, Document-Centric, XML Processing, Conformance/Interop, and Industry Domains.

Group Policy - GPResult Examples - The Sysadmins GPResult is a command-line utility for determining the resultant set of policy for a given user and/or computer. In other words, it shows you what Group Policy Objects have been applied and their settings. This is typically one of the first tools I go to when troubleshooting Group Policy from a client once basic connectivity has been confirmed (e.g.

Velocity (software development) Velocity is a capacity planning tool sometimes used in Agile software development. Velocity tracking is the act of measuring said velocity. The velocity is calculated by counting the number of units of work completed in a certain interval, the length of which is determined at the start of the project.[1] Aspect-oriented programming AOP includes programming methods and tools that support the modularization of concerns at the level of the source code, while "aspect-oriented software development" refers to a whole engineering discipline. Logging exemplifies a crosscutting concern because a logging strategy necessarily affects every logged part of the system. Logging thereby crosscuts all logged classes and methods. History[edit] Gregor Kiczales and colleagues at Xerox PARC developed the explicit concept of AOP, and followed this with the AspectJ AOP extension to Java. IBM's research team pursued a tool approach over a language design approach and in 2001 proposed Hyper/J and the Concern Manipulation Environment, which have not seen wide usage.

Multitier architecture In software engineering, multi-tier architecture (often referred to as n-tier architecture) is a client–server architecture in which presentation, application processing, and data management functions are physically separated. The most widespread use of multi-tier architecture is the three-tier architecture. N-tier application architecture provides a model by which developers can create flexible and reusable applications. By segregating an application into tiers, developers acquire the option of modifying or adding a specific layer, instead of reworking the entire application. A three-tier architecture is typically composed of a presentation tier, a domain logic tier, and a data storage tier.

Step by Step : Install & Configure Printer Pool in Windows Server 2012 R2 What Is Printer Pooling? Printer pooling combines multiple physical printers into a single logical unit. To client computers, the printer pool appears to be a single printer. When jobs are submitted to the printer pool, any available printer in the printer pool can process them. Printer pooling increases the scalability and availability of network printing.

SOA (service-oriented architecture): An approach to building applications that implements business processes or services by using a set of loosely coupled black-box components orchestrated to deliver a well-defined level of service. Found in: Hurwitz, J., Nugent, A., Halper, F. & Kaufman, M. (2013) Big Data For Dummies. Hoboken, New Jersey, United States of America: For Dummies. ISBN: 9781118504222. by raviii Jan 1

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