What Is Virtual Desktop Infrastructure (VDI)?

Key Takeaways

• Virtual desktop infrastructure (VDI) is a technology used to provision and manage centralized virtual desktop environments for users to connect to through end points.
• VDI can improve security by keeping data and desktop management in a centralized environment rather than on users' hardware.
• VDI can be either persistent or non-persistent, depending on whether users’ changes are saved between sessions.
• VDI can scale efficiently when organizations need to provision many desktop environments or scale resources on an existing instance. Avoiding costly physical hardware replacements and faster response to demand.
• VDI is best suited for organizations that need centralized control, secure access, flexible endpoint hardware, or rapid desktop provisioning.

What is VDI?

Virtual desktop infrastructure, or VDI, refers to the technology used to provision, manage, and provide access to virtual desktops for users.

Instead of running a user’s full desktop environment on their local PC or laptop, VDI hosts environments on centralized virtual servers or in the cloud. Users then connect to that desktop remotely from almost any endpoint device with a network connection. This allows IT teams more flexibility in end point hardware while maintaining centralized control over desktop delivery, security, and management.

Why VDI Matters

VDI has become more important as organizations support larger remote and hybrid workforces, offer more flexible device policies, and have higher expectations for secure access to business applications. All with the goal of creating a consistent desktop experience for everyone.

It also helps address practical infrastructure challenges around cost, scale, and security. In many cases, VDI can help to balance the reduced cost of a BYOD (Bring Your Owen Device) policy or longer hardware refresh cycles by raising security standards and mitigating support concerns.

As organizations invest in infrastructure modernization, VDI offers a way to centralize desktop delivery, improve flexibility, and reduce reliance on endpoint hardware.

How Does VDI Work?

VDI works by deploying a set of operating system images that run on virtual machines managed via a hypervisor or instances managed by a cloud provider. These workloads are then accessed by end user machines generally through an application or web browser. This centralization helps standardize provisioning, improve control, and simplify ongoing administration.

Key Components of VDI

Virtual Machines or Instances
Virtual machines, or instances in the case of cloud deployments, are the desktop workloads that run on a hypervisor. Each VM runs its own operating system and applications, allowing the user to work in an environment that behaves like a traditional desktop or a custom application interface. Depending on the deployment model, the VM may be assigned to a single user or provisioned temporarily from a shared pool.

Hypervisor
A hypervisor is the virtualization platform that offers an abstraction layer between the underlying hardware and workload, allowing multiple workloads to share and load balance across the shared hardware resources. The hypervisor acts as a hardware broker, providing workloads with CPU, RAM, and storage as needed. Organizations evaluating platforms often need to compare leading hypervisor options before choosing the right fit for their environment.

Connection Broker
The connection broker authenticates users and routes them to the correct virtual desktop, based on policy, availability and permissions, without the user needing to know where the underlying VM is hosted.

Client Devices
Client devices are the endpoints users rely on to access their virtual workloads. These may include desktops, laptops, thin clients, tablets, or mobile devices.

Persistent vs. Non-Persistent VDI

Persistent virtual machines save their changes between uses. In this configuration, an employee could log into a persistent VM from their laptop, desktop, or mobile device and enjoy consistent access to the same applications, configuration, and files. Persistent deployments are useful for knowledge workers who need access to "their own" environment, but they require more careful monitoring for configuration or security drift.

In contrast, non-persistent, or stateless, VMs do not retain their changes between uses. Stateless VMs are commonly found in kiosks and education deployments. For example, a computer science class could log into a consistent workload, configured with a specific stack of tools, to ensure all students start with the same experience as they work through the learning materials.

User Profile Management

User profile management preserves user-specific settings such as preferences, personalization, and sometimes application configurations across sessions. This is especially important in non-persistent VDI environments, where the desktop itself may reset after logoff. Without profile management, users may lose the familiar experience they expect each time they sign in.

The VDI Process in Action

At a high level, a VDI environment follows a simple repeatable workflow:

1. User authentication via the connection broker
2. Virtual desktop assigns a workload based on users’ profile and permissions
3. User interaction with the virtual desktop environment from their device

Desktop Images and Golden Images

A desktop image is a template file that defines the operating system, configuration, and applications for a virtual desktop. It serves as the blueprint from which desktop environments are created. A golden image is the standardized, administrator-approved, security-tested version of that template used to deploy many consistent desktops at scale. These secure images are usually stored in a central repository, which allows for centralized updates and security controls. These images can then be duplicated and deployed at scale as users need access, which reduces per-machine management overhead and helps maintain consistency across the environment.

Benefits and Limitations of VDI

VDI is a powerful and flexible technology but one that carries significant overheads versus other virtualization solutions. The benefits of using a VDI with hypervisors include:

• Client flexibility. Low-end hardware, like a thin-client or light weight laptop, can be used to access virtual machines, allowing employees to perform more resource-intensive computing tasks without needing dedicated powerful hardware.
• Improved data security. All data is stored on the hosts, virtual machines, and secure networks rather than on the client. Therefore, if the client is lost or stolen, the risk of data theft is greatly reduced.
• Improved application security. Hypervisors allow host hardware to run multiple guest operating systems, each of which is an isolated environment. If an application or service running on one instance is compromised, other machines are generally insulated from the effects.
• Increased scalability. All workloads share the same underlying physical resources, so if there is available processing power, the hosts are available to spin up additional virtual machine copies of an environment or increase allocated resources to a high demand process.
• Increased mobility. Users can connect to their virtual machines from anywhere with relatively low-spec hardware. Mobile salespeople, remote workers, and offsite engineers can access the tools they need, wherever they are.

However, VDI is not suited for every user.

The downsides of VDI include:

• Increased tech support burden. Some users may be confused by having a "desktop that runs on their desktop," leading to support calls because they can't find their files or applications. There could also be authentication problems for end users.
• Upfront increased infrastructure costs. The requirement for a powerful host to run the hypervisor and an IT team that can manage the security, virtual machine backups, and other issues could be prohibitive for some organizations.
• Dependency on internet connection. Users must have a reasonably high-speed and low-latency internet connection to have a smooth experience controlling a remote virtual machine. This may not be an option if the users are in a rural area or travel to client sites.
• Network security. Securing access to the VDI infrastructure is critical and may require additional precautions like VPN or network access controls with device posturing on users’ end points.

Cloud-Native VDI and Desktop as a Service (DaaS)

Organizations can deploy VDI using in-house infrastructure, host it in the cloud also known as Cloud-Native VDI or Desktop as a Service, or adopt a hybrid model that combines both. Cloud-hosted approaches are increasingly common because they can reduce infrastructure overhead and make desktop delivery more flexible. In hybrid, machines with static consumption requirements might be deployed on-prem then scale out temporary resource intensive projects to the cloud.

What is Cloud-Native VDI?

Cloud-native VDI hosts virtual desktops on cloud resources rather than on physical on-premises servers. The core VDI architecture remains the same, but the underlying hardware layer is delivered by a cloud platform instead of being purchased, maintained, and refreshed in-house.

This model can offer several advantages:

• Pay-per-use pricing that aligns costs more closely with actual usage
• Elastic scaling up or down based on changing demand
• No underlying hardware investment for desktop host infrastructure
• Global access for remote users
• Faster integration with other cloud services such as identity, storage and security tooling

Cloud-native VDI is especially useful for organizations with fluctuating user counts, geographically distributed teams, or limited on-premises infrastructure capacity.

Common VDI Use Cases

Remote and hybrid workers
VDI is a strong fit for employees who need access to the same desktop environment from multiple locations. Instead of maintaining separate local setups, users can connect to a standardized workspace from home, the office, or while traveling. This is particularly useful for remote workers, salespeople, and engineers who need consistent access to business tools.

Call center operatives
Call centers often need to provision large numbers of standardized desktops quickly with specific software already installed. VDI makes it easier to deliver consistent application access, enforce security controls, and support shift-based work. It can also simplify onboarding and replacement when staffing changes frequently.

BYOD environments
Organizations with BYOD policies can use VDI to separate the work environment from the personal device. The user accesses a centrally controlled desktop while business data remains in the hosted environment rather than on the endpoint itself. This can improve security while still giving users flexibility in how they connect.

High-security industries
Finance, healthcare, government and other highly regulated sectors often need tighter control over where sensitive data resides and how access is managed. VDI helps by centralizing the desktop, applications, and often the data itself. That makes it easier to apply uniform policies, reduce local data exposure, and support auditing requirements for knowledge workers handling sensitive information.

Seasonal and contractor workforces
Organizations with seasonal employees, temporary staff, or contractors may need to provision and remove desktop access quickly. VDI allows IT teams to spin up standardized environments without shipping and managing full hardware stacks for every short-term user. This can reduce both onboarding friction and offboarding risk.

Resource-intensive tasks
VDI is also valuable in environments where users need access to compute-heavy software but not necessarily high-powered local machines. Animators, graphic artists, CAD workers, and researchers running simulations can connect to virtual desktops backed by stronger centralized resources. This can improve access to specialized tools while keeping performance management and support centralized.

How to Get Started with VDI

Is VDI Right for You?

VDI could be right for your organization if:

• You need to be able to onboard new users quickly and easily
• You need to provide access to specialist software, and already have hardware that can run the VM clients or containerized instances
• Your organization has a BYOD policy or longer end-user refresh cycles
• You have remote knowledge-workers
• You have kiosk at multiple sites, all accessing the same database to perform specialist tasks
• Applications need specialized security and governance that is hard to maintain on local machines
• You have an in-house IT team that has the skills to manage the infrastructure
• Your endpoint machine's reliability has stable, high-speed internet connection

If you've decided that virtualization makes sense for your business and would like to use VDI, consider the following:

• Whether you'll use persistent or non-persistent VMs
• How you'll backup and restore VM data
• Which hypervisor or solution you'll use. For example, you may want to review VMware vs. Hyper-V and supporting management considerations in Hyper-V Manager
• The licensing requirements of any software you'll be running in the VM (each deployment may count as a seat)
• Map the resource allocation (and burst allocations) for each virtual machine against any datacenter costs associated with running the host machine
• Whether a cloud-native or on-premises deployment model is the better fit for your organization, based on the scale, control, and operational trade-offs discussed above

If you'd like to learn more about virtualization and how Veeam's Hyper-V backup solution could help you protect your data, contact us for a consultation. For organizations running VDI on any hypervisor or container engine, the right backup and recovery solution can help protect the images, machine data, and the infrastructure users depend on every day.