As you build your desktop transformation project, you must consider the size you want to scale your XenDesktop site , and when the risk into the equation. If you read the blog of Daniel Feller on extending XenDesktop sites, you will know what I mean. XenDesktop can grow very large single-site infrastructure, but at some point, you will hit that point of view the risk of tipping, and will need to look at building your architecture into smaller modules that are easy to digest to avoid risk of a site failure affecting the entire user base.
Enter the XenDesktop Modular Reference Architecture. The modular architecture breaks the various components required to deliver virtual desktops in three basic layers; access layer, the desktop layer and the control layer. Each layer is then divided into modules and components that can be scaled as needed to meet the growth in the environment, and allows multiple hosted VDI or hosted shared desktop pods site to minimize the risk of a single site failure XenDesktop.
As its name suggests, the access layer contains components that provide user access to the environment; NetScaler appliances and Web Interface servers. The NetScaler does double because it provides a secure through integrated Access Gateway access and also provides intelligent load balancing for the Web interface, controller XenDesktop and XenApp infrastructure controller.
The desktop layer provides the resources to accommodate the hypervisor and provide virtual desktops using VDI and hosted shared FlexCast hosted models. Each pod in the office layer corresponds to a XenDesktop or XenApp farm website. As the configuration grows in size, the additional sites pods can be added to the configuration to increase the number of virtual desktops delivered while allowing a lower risk and a redundancy element.
The control layer is home to the various controllers and infrastructure necessary for the management and delivery of virtual desktops. It is divided into two general areas; per workstation of the nacelle control elements and data centers inter-control elements. The per-desktop pod elements are unique to a pod of office and provide the specific control elements necessary to make it work; XenDesktop and XenApp controllers, and Provisioning Servers as needed. The data centers of inter-operating elements serve the whole architecture XenDesktop.
Want to know more? Download the XenDesktop Modular Reference Architecture from the Citrix Knowledge Center or find it in the XenDesktop Design Handbook. . The document breaks down the layers and the specific components and provides design guidance, and a sample configuration. And do not forget to visit us at Citrix Synergy. You will be able to get deeper into the series of processing office into five parts:
Part1: Getting started with the transformation of your office
Part 2: Design successful transformation your office
Part 3: the user experience design tips for transforming your office
Part 4: Go live with the transformation of your office
Part 5: Keep your desktop transformation works well
Rich Meesters - Architect
Worldwide Consulting Solutions
Twitter: @richski
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