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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". System virtual machines[edit] System virtual machine advantages: multiple OS environments can co-exist on the same computer, in strong isolation from each otherthe virtual machine can provide an instruction set architecture (ISA) that is somewhat different from that of the real machineapplication provisioning, maintenance, high availability and disaster recovery[3] The main disadvantages of VMs are: Process virtual machines[edit]

http://en.wikipedia.org/wiki/Virtual_machine

Related:  Virtual Machines and vCenter (VMware)

Virtual Machine Technology The key component in building this abstraction layer is commonly referred to as a VMM (virtual machine monitor) or, sometimes, a hypervisor. This software is responsible for sharing the computer's physical resources among the many VMs that could be running. The VMM is not an easy piece of software to get right because it must trick the guest OS into thinking it has control of the real hardware. 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. Clouds can be classified as public, private and hybrid.[1][2]

Difference between vSphere, ESXi and vCenter There is a lot of buzz of VMware virtualization solution these days. No doubt that VMware is the number one virtualization solution provider in the industry. People who are new to VMware’s virtualization platform often get confused while learning VMware vSphere and its components. So today I will be explaining all about vSphere and its components. Folks face difficulty to know about major components of vSphere. It’s important to know the difference between vSphere, ESXi and vCenter. 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.

How to Add a VMware vCenter Server to VMM Applies To: System Center 2012 SP1 - Virtual Machine Manager, System Center 2012 R2 Virtual Machine Manager, System Center 2012 - Virtual Machine Manager You can use the following procedure to add a VMware vCenter Server to Virtual Machine Manager (VMM). You must add the vCenter Server before you can add VMware ESX hosts. 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] The term "software as a service" (SaaS) is considered to be part of the nomenclature of cloud computing, along with infrastructure as a service (IaaS), platform as a service (PaaS), desktop as a service (DaaS), backend as a service (BaaS), and information technology management as a service (ITMaaS).

What is VMware VCenter Server? - Definition from Techopedia VCenter Server is installed at the primary server of a virtualized data center and operates as the virtualization or virtual machine manager for that environment. It also provides data center administrators and a central management console to manage all the system's virtual machines. Virtual center provides statistical information about the resource use of each virtual machine and provisions the ability to scale and adjust the compute, memory, storage and other resource management functions from a central application. It manages the performance of each virtual machine against specified benchmarks, and optimizes resources wherever required to provide consistent efficiency throughout the networked virtual architecture.

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] The main idea behind velocity is to help teams estimate how much work they can complete in a given time period based on how quickly similar work was previously completed.[2] VMware vCenter Design and Installation Options There have always been questions around why, how, and where VMware’s vCenter should be installed and what design option is best. In this article, the author will tackle those questions revolving around vCenter installation so that you know why you chose the option you chose and why it was the best option for you. What Editions of vCenter Are Available?

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