Virtualization is a technology that helps us to install different Operating Systems on a hardware. They are completely separated and independent from each other. In Wikipedia, you can find the definition as – "In computing, virtualization is a broad term that refers to the abstraction of computer resources. Virtualization hides the physical characteristics of computing resources from their users, their applications or end users. This includes making a single physical resource (such as a server, an operating system, an application or a storage device) appear to function as multiple virtual resources. It can also include making multiple physical resources (such as storage devices or servers) appear as a single virtual resource... " Virtualization is often − The creation of many virtual resources from one physical resource. The creation of one virtual resource from one or more physical resource. Types of Virtualization Today the term virtualization is widely applied to a number of concepts, some of which are described below − Server Virtualization Client & Desktop Virtualization Services and Applications Virtualization Network Virtualization Storage Virtualization Let us now discuss each of these in detail.
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Application-Driven Unlike VMware, Oracle's virtualization solutions know what is running inside the virtual machine and can provision and manage applications, middleware, and databases accordingly. Low Cost Unlike VMware, Oracle VM is free to download, use, and distribute, with affordable support fees. Integrated Management Full-stack management lets you efficiently manage the hypervisor, physical server, and applications through one console. Accelerated Deployment Virtualize Oracle Applications seven to ten times faster than with VMware. High Availability Oracle offers high availability solutions for the entire stack—not just the hypervisor. Rapid Implementation Oracle VM Templates make it quick to deploy enterprise software, including CRM, ERP, clustering, and management. Oracle VM Reference Configurations accelerate deployment of complete virtual infrastructure. Efficient Architecture Having a single engineering team for Linux and Oracle VM leads to better optimization between the hypervisor and Linux.
Enabling Rapid Migration and Workload Isolation in the Cloud. Network Virtualization using Generic Routing Encapsulation Learn from the Internet Engineering Task Force (IETF) Internet Draft on Network Virtualization using Generic Routing Encapsulation (NVGRE). NVGRE: Network Virtualization using Generic Routing Encapsulation. Hyper-V Network Virtualization Packet Flow This presentation provides motivation for Hyper-V Network Virtualization, provides example NVGRE packet flows, and shows how Hyper-V Network Virtualization can route packets between virtual subnets. Hyper-V Network Virtualization Packet Flow. Network Virtualization in Windows Server 2012 and System Center VMM 2012 SP1 A blog post by Marc van Eijk from the Dutch Hyper-V Community () on the inner workings of NVGRE and System Center VMM 2012 SP1. Hyper-V Network Virtualization in Windows Server 2012 Windows Server Gateway Learn more about Windows Server Gateway (WSG), which is a new feature in Windows Server 2012 R2. WSG is a virtual machine (VM)-based software router that allows Cloud Service Providers (CSPs) and Enterprises to enable datacenter and cloud network traffic routing between virtual and physical networks, including the Internet.
Learn more Get started Download Oracle Linux KVM Oracle Linux is free to download and distribute and includes KVM. Download Oracle VM VirtualBox Freely available for Windows, Mac OS X, Linux, and Solaris x86 platforms. Download Oracle VM Server Complete server virtualization and management solution with zero license cost. Talk with one of our product experts.
Aggressive testing of Oracle improves functionality and performance. Integrated Support Full-stack support means faster resolution of issues, with no finger pointing at multiple vendors. A Comprehensive Platform Oracle VM is available for both x86 and SPARC architectures.
Everything else is a confusing jumble of alphabet soup. I'll define a list of common VM terms later in the tip. What are the benefits to virtual servers? Now that we have a rough idea of what a virtual environment looks like, let's discuss some of the benefits. Firstly, borrowing a resource such as CPU's (in a virtual environment they are called vCPUs since a CPU is not physically attached to the VM - the physical CPUs are labeled pCPUs) can be a good thing when you have plenty to spare. What works in life can work in VM. If you have plenty and someone else has little, you might as well share. Sharing allows companies to optimize resources. The technical term for memory sharing is called ballooning and refers to the delegation of memory resources where it is most needed on the host. Ballooning takes away from the classic provisioning which is typical when configuring new systems. Some DBA's like this and some don't. We'll talk about that more later. VM offers fast provisioning of new systems.
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