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 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 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 The main disadvantages of VMs are: Process virtual machines
Related: Virtual Machines and vCenter (VMware)
Virtual Machine Technology | Network ComputingThe 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. To accomplish this, the VMM runs at processor privilege level Ring 0. The guest OS runs up a level, at Ring 1. Most modern OSs run user applications at Ring 3, where applications are prevented from trampling on or otherwise adversely affecting one another. Another component to creating a VM is abstracting the hardware layer. Putting VMs to WorkVirtualBoxOracle VM VirtualBox (formerly Sun VirtualBox, Sun xVM VirtualBox and innotek VirtualBox) is a virtualization software package for x86 and AMD64/Intel64-based computers from Oracle Corporation as part of its family of virtualization products. It was created by innotek GmbH, purchased in 2008 by Sun Microsystems, and now developed by Oracle. It is installed on an existing host operating system as an application; this host application allows additional guest operating systems, each known as a Guest OS, to be loaded and run, each with its own virtual environment. Since version 4.3, Windows guests on supported hardware can take advantage of the recently implemented WDDM driver included in the guest additions; this allows Windows Aero to be enabled along with Direct3D support. History Logo of VirtualBox OSE, 2007-2010 Sun Microsystems acquired innotek in February 2008. Licensing Prior to version 4, there were two different packages of the VirtualBox software.
Difference between vSphere, ESXi and vCenterThere 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. VMware Inc. is a software company that develops many suites of software products specially for providing various virtualization solutions. vSphere is a software suite that comes under data center product. vSphere is like Microsoft Office suite which has many softwares like MS Office, MS Excel, MS Access and so on. ESXi, vSphere client and vCenter are components of vSphere. vCenter server is similar to vSphere client but it’s a server with more power. vCenter server is installed on Windows Server or Linux Server. The following two tabs change content below.
Cloud Computing Services with VMware Virtualization - Cloud InfrastructureLuckily you don’t need to rearchitect for different public cloud infrastructures. VMware cloud computing services let you run both new and legacy applications in the cloud so you can leverage your existing investments while still gaining the agility and cost-effectiveness of a public cloud. If your existing infrastructure is built on VMware vSphere, used by more than 80% of businesses worldwide, you can take advantage of a true hybrid cloud solution and extend your data center to the cloud quickly, easily and confidently. Because VMware vCloud Air is built on vSphere, your onsite and offsite IT environments can be connected and integrated, running existing and new applications in exactly the same way.
How to Add a VMware vCenter Server to VMMApplies 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. Before you begin this procedure, make sure that the following prerequisites are met: The server that you want to add must be running a supported version of vCenter Server. For more information, see as follows:For communications between the VMM management server and the vCenter Server, encryption using Secure Sockets Layer (SSL) requires a certificate to verify the identity of the vCenter Server. To add a vCenter ServerComparison of platform virtual machinesPlatform virtualization software, specifically emulators and hypervisors, are software packages that emulate the whole physical computer machine, often providing multiple virtual machines on one physical platform. The table below compares basic information about platform virtualization hypervisors. General Features ^ Providing any virtual environment usually requires some overhead of some type or another. Image type compatibility Other features ^ Windows Server 2008 R2 SP1 and Windows 7 SP1 have limited support for redirecting the USB protocol over RDP using RemoteFX.^ Windows Server 2008 R2 SP1 adds accelerated graphics support for certain editions of Windows Server 2008 R2 SP1 and Windows 7 SP1 using RemoteFX. Restrictions This table is meant to outline restrictions in the software dictated by licensing or capabilities. Note: No limit means no enforced limit. See also Notes References External links
What is VMware VCenter Server? - Definition from TechopediaVCenter 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.
VMware vSphereVMware vSphere, a holistic view VMware vSphere (formerly VMware Infrastructure 4) is VMware's cloud computing virtualization operating system. History While VMware Infrastructure 3.5 was in development, vSphere was conceived as an enhanced suite of tools for cloud computing utilizing VMware ESX/ESXi 4. The cloud computing-enabled tool suite was spun off as VMware Infrastructure 4 (for short, VI 4) to be distinct from VMware Infrastructure 3.5 (VI 3.5) that was then ready for release (March 30, 2009). VMware eventually announced vSphere 4 instead of VI 4 on April 21, 2009 and released it on May 21, 2009. VMware released Update 1 for vSphere 4 on November 19, 2009 to add support for Windows 7 and Windows Server 2008 R2. VMware's vSphere 4.1 began shipping in August 2010. On July 12, 2011, VMware released version 5 of VMware vSphere. On August 27, 2012, VMware released vSphere 5.1. See also Reference list External links
VMware vCenter Design and Installation OptionsThere 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? Most people would say that there are just 2 editions of vCenter – standard and foundation. However, another edition is built into the vSphere Essentials Kit (not upgradable to the other editions). Thus, there could actually be 3 different versions of vCenter with the most limited being the version in vSphere Essentials. Standard - the most advanced version of vCenter available that manages an unlimited number of ESXi servers. vCenter Standard provides large scale management of an enterprise virtual infrastructure. Which one should you use? What’s New in vSphere 5 Related to vCenter? Pros Cons What is Required to use the vSphere Web Client?