![]() ![]() Depending on enterprise requirements, IT may employ one gold image for all VDI workloads or numerous gold images. 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.Ī mechanism for mastering and distributing VDI images is necessary, and there is significant complexity involved with these processes. 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. Although this computing resource can technically be a physical desktop, virtual machines are a more common choice.įor on-premises deployments, a hypervisor hosts the virtual machines that will deploy as VDI. First and foremost, IT must present a computing resource to the user. VDI requires several distinct technologies working in unison to successfully present a virtual desktop to a user. When a user enters additional data in a cell, only updated bitmaps are transmitted. The data itself does not populate the user display, but instead shows bitmaps representing the data. 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 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. In addition, EDT and Blast Extreme are optimized for User Datagram Protocol ( UDP). PCoIP is licensed from Teradici, whereas Blast Extreme is VMware's in-house protocol. The display protocol, or session protocol, controls the user display and multimedia capabilities, and the specific features and functionality of each protocol vary. Microsoft Remote Desktop can only use RDP. VMware user sessions can be based on Blast Extreme, PCoIP or RDP. High-definition user experience ( HDX) from Citrix is largely an umbrella marketing term that encompasses ICA, EDT and some additional capabilities. ![]() Independent Computing Architecture (ICA).Each vendor platform is based on a remote display protocol that carries session data between the client and computing resource: Display protocolsĮach endpoint device must install the respective client software or run an HTML5-based session that invokes the respective session protocol. 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. Thus, Windows 10 now has true workstation multi-user functionality. 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. Until recently, a workstation operating system could only service users as 1:1. ![]() 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. ![]() 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. 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.Ī server operating system can service users as either 1:1 or 1:many. Traditionally, the term VDI has most commonly referred to a virtualized workstation operating system allocated to a single user, but that definition is changing.Įach 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. VDI may be based on a server or workstation operating system. ![]()
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