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    What Is Virtual Desktop Infrastructure (VDI)?

    Virtual desktop infrastructure (VDI) is a virtualization solution in which a desktop instance is hosted on a centralized server in a data center and accessed over the network with an endpoint device. VDI implementations has introduced the need for a thorough view of End User Computing.

    What is virtual desktop infrastructure (VDI)?

    Virtual desktop infrastructure (VDI) is a virtualization solution that uses virtual machines to provide and manage virtual desktops. VDI hosts desktop environments on a centralized server and deploys them to end-users on request. accessed over the network with an endpoint device (laptop, tablet, and so on).

    With a VDI solution in place, organizations can realize a number of benefits. The desktop computing takes place on the host server, rather than at the endpoint device, so the hardware requirements for the endpoint are lower. This potentially makes the investment in an endpoint device lower, and it may be easier to support a diverse range of remote and mobile devices. As the hardware needs of the desktop software change, it may also be easier to reallocate CPU and memory from the server side than from the endpoint devices.

    Security and configuration management are additional benefits of the VDI solution. Because all data lives in the data center, any loss of an endpoint device limits the exposure of the data that is not stored in the device. In environments with standardized desktop configurations that do not need to be customized for each user, a VDI instance offers strict controls to eliminate deviation from organizational standards.

    How does virtual desktop infrastructure (VDI) work?

    Two of the main data center components of a VDI architecture are the hypervisor and the connection broker. The hypervisor first decouples the physical hardware from the logical operating system, which resides on the data center server and allows multiple virtual desktops to be served from a single physical server. The connection broker is the software gateway that connects each desktop user to their individual desktop instance. This layer authenticates every user regardless of endpoint device.

    Desktop use patterns tend to be less predictable that many of the other data center workloads, and it’s difficult to predict core workload resource contention coming from a virtual desktop. Traditionally, the architecture for deploying the VDI solution in an organization has been associated with a dedicated PoD of hardware that contains specified compute, network, and storage hardware built to support a set number of virtual desktops. This PoD (a dedicated number of hosts connected to a committed storage device) was separated from the other systems to ensure that the fluctuations of the desktop workloads would not interfere with the other workloads in the data center. This model ensures that the performance of both the VDI environment and the core applications remains predictable. This isolation also limits the scope of failures across end users and application workloads.

    Two approaches to deploying desktops

    Persistent desktop. Each user is assigned a unique desktop instance, which they can customize to their individual preferences.

    Nonpersistent desktop. Users can access a pool of uniform desktop images as needed to perform tasks. These nonpersistent desktops revert to their original state after each use, rather than being personalized for a unique user.

    Virtual desktop infrastructure (VDI) use cases

    Remote workers

    The use of VDI environments makes it much easier to provide access for remote workers to organizational standard desktop environments across a broad range of devices. With the virtual desktop, access to the core software systems can be controlled and access can be granted to any remote worker at a remote site, with minimal investment. Regardless of location, each team member has access to the same organizational network and resources while maintaining central access and application controls. Persistent desktops can be customized to suit each user, while the data remains centralized in the core data center.

    Call centers

    A major advantage of a nonpersistent desktop is the ability to simply consume a standard desktop from a pool of identical desktops. The typical call center is an excellent example of how this model directly supports the needs of a team of people. Each member of the team is only required to do a specific set of tasks, which do not require the desktop to be nonstandard. With a workforce that can flex up or down, the ability to simply log in to an available desktop during the person’s work hours minimizes the overhead of providing individual physical desktop machines. The standard nonpersistent desktop instance can be easily patched and deployed with just the requisite software installed and can be deployed across physical sites with minimal complications.

    Contract employees

    When temporary contractors join a team, they need access to some of the core assets and team members, but security is an important consideration. By using a virtual desktop, it’s possible to control access to corporate resources while delivering the connection point for the temporary workers. Contractors are able to perform tasks that use organizational resources without having access to systems that are not related to the contract. This control also minimizes the investment in providing a physical endpoint device during the term contract.

    Learn more about VDI and related solutions

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    End user computing

    स्रोत : www.netapp.com

    What Is Virtual Desktop Infrastructure? VDI Explained

    Virtual desktop infrastructure delivers desktop images over a network to endpoint devices, enabling users to access their desktops from anywhere. Learn more about this technology and how it works.

    Home Virtual & Remote Desktop Strategies Virtualization What is virtual desktop infrastructure? VDI explained


    What is virtual desktop infrastructure? VDI explained

    Erica Mixon Jo Harder

    Virtual desktop infrastructure (VDI) is a desktop virtualization technology wherein a desktop operating system, typically Microsoft Windows, runs and is managed in a data center. The virtual desktop image is delivered over a network to an endpoint device, which allows the user to interact with the operating system and its applications as if they were running locally. The endpoint may be a traditional PC, thin client device or a mobile device.

    The concept of presenting virtualized applications and desktops to users falls under the umbrella of end-user computing (EUC). The term VDI was originally coined by VMware and has since become a de facto technology acronym. While Windows-based VDI is the most common workload, Linux virtual desktops are also an option.

    How the user accesses VDI depends on the organization's configuration, ranging from automatic presentation of the virtual desktop at logon to requiring the user to select the virtual desktop and then launching it. Once the user accesses the virtual desktop, it takes primary focus, and the look and feel are that of a local workstation. The user selects the appropriate applications and can perform their work.

    Operating system

    VDI may be based on a server or workstation operating system. Traditionally, the term VDI has most commonly referred to a virtualized workstation operating system allocated to a single user, but that definition is changing.

    Each virtual desktop presented to users may be based on a 1:1 alignment or a 1:many ratio, which is often referenced as multi-user. For example, a single virtual desktop allocated to a single user is considered 1:1, but numerous virtual desktops shared under a single operating system is a hosted shared model, or 1:many.

    A server operating system can service users as either 1:1 or 1:many. Where a server operating system is the platform for VDI, Microsoft Server Desktop Experience is enabled to more closely mimic a workstation operating system to users. Desktop Experience adds features such as Windows Media Player, Sound Recorder and Character Map, all of which are not natively included as part of the generic server operating system installation.

    Until recently, a workstation operating system could only service users as 1:1. However, in 2019, Microsoft announced the availability of Windows Virtual Desktop (WVD), which enables multi-user functionality on Windows 10, which was previously only available on server operating systems. Thus, Windows 10 now has true workstation multi-user functionality. WVD is only available on Microsoft's own cloud infrastructure, Azure, and there are stringent licensing requirements that make it inappropriate for all but enterprise organizations.

    Display protocols

    Each endpoint device must install the respective client software or run an HTML5-based session that invokes the respective session protocol. Each vendor platform is based on a remote display protocol that carries session data between the client and computing resource:


    Independent Computing Architecture (ICA)

    Enlightened Data Transport (EDT)

    VMware Blast Extreme PC over IP (PCoIP) Microsoft

    Remote Desktop Protocol (RDP)

    High-definition user experience (HDX) from Citrix is largely an umbrella marketing term that encompasses ICA, EDT and some additional capabilities. VMware user sessions can be based on Blast Extreme, PCoIP or RDP. Microsoft Remote Desktop can only use RDP.

    The display protocol, or session protocol, controls the user display and multimedia capabilities, and the specific features and functionality of each protocol vary. PCoIP is licensed from Teradici, whereas Blast Extreme is VMware's in-house protocol. In addition, EDT and Blast Extreme are optimized for User Datagram Protocol (UDP).

    The session protocols listed above minimize and compress the data that is transmitted to and from the user device to provide the best possible user experience. For example, if a user is working on a spreadsheet within a VDI session, the user transmits mouse movements and keystrokes to the virtual server or workstation, and bitmaps are transmitted back to the user device. The data itself does not populate the user display, but instead shows bitmaps representing the data. When a user enters additional data in a cell, only updated bitmaps are transmitted.


    VDI requires several distinct technologies working in unison to successfully present a virtual desktop to a user. First and foremost, IT must present a computing resource to the user. Although this computing resource can technically be a physical desktop, virtual machines are a more common choice.

    For on-premises deployments, a hypervisor hosts the virtual machines that will deploy as VDI. Citrix Virtual Apps and Desktops and Microsoft RDS may be hosted on any hypervisor, whereas VMware Horizon has been engineered to run on its ESXi hypervisor. When organizations must use virtual graphics processing units (vGPUs) to support highly graphical applications such as radiographic imaging or computer-aided design (CAD), it's common to use Citrix Hypervisor (formerly XenServer) or VMware ESXi.

    A mechanism for mastering and distributing VDI images is necessary, and there is significant complexity involved with these processes. Depending on enterprise requirements, IT may employ one gold image for all VDI workloads or numerous gold images. Minimizing the number of images decreases administrative effort, as each image adds exponential overhead. IT must open gold images, revise them with Windows updates, base applications, antivirus and other changes, and then subsequently re-enable them.

    स्रोत : www.techtarget.com

    What is VDI?

    Virtual desktop infrastructure(VDI) is the technology for providing and managing virtual desktops.

    What is VDI (Virtual Desktop Infrastructure)?

    What is VDI (Virtual Desktop Infrastructure)?

    How does VDI work?

    Persistent VDI vs Non-persistent VDI

    Why VDI? Benefits of VDI

    What is VDI used for?

    Difference between VDI and Desktop Virtualization

    Difference between VDI and Virtual Machines (VMs)

    How to implement VDI?

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    What is VDI (Virtual Desktop Infrastructure)?

    Virtual Desktop Infrastructure (VDI) is a technology that refers to the use of virtual machines to provide and manage virtual desktops. VDI hosts desktop environments on a centralized server and deploys them to end-users on request.

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    How does VDI work?

    In VDI, a hypervisor segments servers into virtual machines that in turn host virtual desktops, which users access remotely from their devices. Users can access these virtual desktops from any device or location, and all processing is done on the host server. Users connect to their desktop instances through a connection broker, which is a software-based gateway that acts as an intermediary between the user and the server.

    Persistent VDI vs Non-persistent VDI

    VDI can be either persistent or non-persistent. Each type offers different benefits:

    With persistent VDI, a user connects to the same desktop each time, and users can personalize the desktop for their needs since changes are saved even after the connection is reset. In other words, desktops in a persistent VDI environment act like personal physical desktops.

    In non-persistent VDI, where users connect to generic desktops and no changes are saved, it is usually simpler and cheaper since there is no need to maintain customized desktops between sessions. As a result, Nonpersistent VDI is often used in organizations with many task workers or employees who perform a limited set of repetitive tasks and don’t need a customized desktop.

    Why VDI?

    VDI offers a number of advantages, such as user mobility, ease of access, flexibility and greater security. In the past, its high-performance requirements made it costly and challenging to deploy on legacy systems, which posed a barrier for many businesses. However, the rise in enterprise adoption of hyperconverged infrastructure (HCI) offers a solution that provides scalability and high performance at a lower cost.

    Benefits of VDI

    Although VDI’s complexity means that it isn’t necessarily the right choice for every organization, it offers a number of benefits for organizations that do use it. Some of these benefits include:

    Remote access: VDI users can connect to their virtual desktop from any location or device, making it easy for employees to access all their files and applications and work remotely from anywhere in the world.Cost savings: Since processing is done on the server, the hardware requirements for end devices are much lower. Users can access their virtual desktops from older devices, thin clients, or even tablets, reducing the need for IT to purchase new and expensive hardware.Security: In a VDI environment, data lives on the server rather than the end client device. This serves to protect data if an endpoint device is ever stolen or compromised.Centralized management: VDI’s centralized format allows IT to easily patch, update or configure all the virtual desktops in a system.

    What is VDI used for?

    Although VDI can be used in all sorts of environments, there are a number of use cases that are uniquely suited for VDI, including:

    Remote work: Since VDI makes virtual desktops easy to deploy and update from a centralized location, an increasing number of companies are implementing it for remote workers.Bring your own device (BYOD): VDI is an ideal solution for environments that allow or require employees to use their own devices. Since processing is done on a centralized server, VDI allows the use of a wider range of devices. It also offers better security, since data lives on the server and is not retained on the end client device.Task or shift work: Nonpersistent VDI is particularly well suited to organizations such as call centers that have a large number of employees who use the same software to perform limited tasks.

    Difference between VDI and Desktop Virtualization

    Desktop virtualization is a generic term for any technology that separates a desktop environment from the hardware used to access it. VDI is a type of desktop virtualization, but desktop virtualization can also be implemented in different ways, such as remote desktop services (RDS), where users connect to a shared desktop that runs on a remote server.

    Difference between VDI and Virtual Machines (VMs)

    स्रोत : www.vmware.com

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