You have many options for deploying a virtual infrastructure running Windows 7, depending on your needs and environment.
Adapted from “Microsoft Windows 7 Administrator’s Reference” (Syngress, an imprint of Elsevier)
No two businesses are the same, and no two businesses’ needs and environments are the same. Fortunately, there is considerable flexibility when it comes to virtualization. Windows 7 supports several alternative deployment models for virtual desktops.
Virtual Desktop Infrastructure (VDI) is one such alternative desktop deployment model for Windows 7. Instead of running a local copy on each user’s desktop, you create and store a common image on one or more servers in the datacenter. You then deploy this image to a server running a hypervisor.
There are several benefits to implementing a VDI infrastructure:
There are some barriers to implementing a VDI. The startup costs can be high, and the return on investment is longer than on a server virtualization project. This is a business decision that you shouldn’t take lightly. Plan and establish a budget before embarking on the project. Here are some specific areas you need to consider:
A distributed desktop model lets you deploy different desktop images to a specific group of users based on their location or job function. This model can be useful if you have a number of different types of users in a single location or users in a variety of locations such as branch offices. Each group will have different desktop requirements or might be connected by slow or intermittent links. The remote users may have a file server that stores their files and information.
Another distributed desktop design could include setting up a pre-execution environment. This method lets you deploy an image to a server with a desktop to download and boot at startup. You can develop and assign several desktop images. When a user starts up his desktop, the image is streamed to the device. Changing a desktop image is as simple as reconfiguring the device’s target image and restarting the desktop.
This is a viable design if you must run applications from the local desktop. Some applications require a hardware dongle or a specific Media Access Control address for licensing. Applications that require special graphics or additional cards or adapters not supported within a virtual environment are also good candidates for this type of deployment.
The drawbacks and benefits are as follows:
The VDI image is received from the primary datacenter. The management station controls which images are assigned to local and remote users. Local users connect to the image they’re assigned from the VDI server in the datacenter.
Therefore, this model is best used with a local server that holds the desktop images. Loading a desktop image over a WAN is a slow process that will discourage remote users from rebooting their desktops. In this scenario, consider using either a local VDI or a distributed VDI solution.
You can also distribute desktops using Microsoft System Center Configuration Manager. You can use this to distribute both applications and desktops to user’s desktops, both local and remote. This model will actually install the desktop OS on the targeted desktop. This is a fairly complex process, so you’ll have to plan and test the solution for optimum success. You can also use this management solution in conjunction with System Center Virtual Machine Manager 2008 to create, deploy and manage desktops in a distributed environment.
When it comes to deploying a user’s desktop, there are several options. One design rarely fits all situations. You can see from these different scenarios that you can also use a combination of all these options to meet your specific needs.
Jorge Orchilles began his networking career as a network administrator for the small private school he attended. He’s currently a security operating center analyst, and recently completed his Master of Science degree in management information systems at Florida International University.
©2011 Elsevier Inc. All rights reserved. Printed with permission from Syngress, an imprint of Elsevier. Copyright 2011. “Microsoft Windows 7 Administrator’s Reference” by Jorge Orchilles. For more information on this title and other similar books, please visit elsevierdirect.com.