Virtual desktop infrastructure problems solved with WAN optimization

WAN optimization solves the problems associated with implementing virtual desktop infrastructure (VDI) and Web-based applications. Find out how in part three of the e-Book, 'The Ultimate Guide to Gaining Control of the WAN.'

Part three of the e-Book, The Ultimate Guide to Gaining Control of the WAN, explains how wide area network (WAN) optimization solves the problems associated with implementing virtual desktop infrastructure (VDI) and Web-based applications. Navigate the table of contents to read other sections of this e-Book or skip below to learn how WAN optimization solves virtual desktop infrastructure and HTTP problems.

Table of contents
Part 1: Save WAN costs with branch office server consolidation
Part 2: How to accelerate encrypted traffic using WAN optimization
Part 3: Virtual desktop infrastructure problems solved by WAN optimization
Part 4: Using the WAN for telepresence, video conferencing
Part 5: Using WAN optimization for bandwidth management and monitoring
Part 6: Update network security architecture during server consolidation
Part 7: Wide area network optimization: Do it in-house, or use a WAN service provider?

Optimizing virtual desktop infrastructure and HTTP traffic

WAN optimization also solves the problems associated with implementing virtual desktop infrastructure (VDI) and Web-based applications that use HTTP. The major problem with VDI, the practice of hosting a desktop operating system within a virtual machine running on a centralized server, is that large amounts of data must be transferred quickly over the network. That problem is solved by a WAN bandwidth optimization technique called dictionary compression.

Object caching combined with dictionary compression reduces the bandwidth impact and greatly improves response time for Web/HTTP traffic. Web pages are based on objects; each item on the page is an object. Rich media objects make Web applications appealing to users, but they generate significantly more data than the client/server applications they replace. WAN optimization controllers (WOCs) can reduce the impact of these rich objects, because it is common for the same object to be used on multiple pages or accessed frequently by the same users. The WOC stores a copy of the object, and when a page requests an object that the WOC already has in its cache, it sends its copy. This also addresses an HTTP protocol efficiency that has an impact on response time. The Web application may serially request the object as it builds a page. It waits until the first object is received before asking for the next object. Because the objects travel over the WAN, the WAN latency increases the page’s response time. Using the objects in the WOC’s cache mitigates the problem because the WAN latency is removed.

Overcoming Web and virtual desktop infrastructure challenges means enterprises can move ahead with money-saving projects and productivity-enabling applications, in many cases avoiding bandwidth upgrades. Response time problems are eliminated.

Continue reading part four of this e-Book to learn how deploying telepresence, video conferencing and unified communications in the WAN saves companies money.

About the author:
Robin Layland is President of Layland Consulting. As an industry analyst and consultant, Robin has covered all aspects of networking from both the business and technical side, and has published over 100 articles in leading trade journals including NetworkWorld, Business Communication Review, Network Magazine and Data Communications. Prior to his current role, Robin spent a combined fifteen years at American Express and Travelers Insurance in a wide range of jobs including network architect, technical support, management, programming, performance analysis and capacity planning.

This was last published in November 2010

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