Red Hat ENTERPRISE VIRTUALIZATION FOR DESKTOPS Manual de usuario descargar pdf (Pagina 5)

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Enterprise Virtualization for Desktops

DRAWBACKS WITH CURRENT

VIRTUAL DESKTOP SOLUTIONS

Althoughhostedvirtualdesktopsoffersignicantadvantagesrelativetotraditionaldesktopdeliverymodels,

the current solutions suffer from several drawbacks both from a user perspective and from an IT perspective.

USER CHALLENGES WITH EXISTING VIRTUAL DESKTOP SOLUTIONS

The biggest problem with current desktop virtualization solutions is the end-user experience.

User experience: Remote connection protocols such as RDP do not provide for a good or transparent •

end-user experience. RDP was designed in the terminal services era when multimedia was not a large

part of the corporate computing experience.

Graphics: Graphic-enabled websites, video, and audio playback for training videos, company broadcasts, •

andotherrichmediastreamsposesignicantproblems.Inaddition,manyoftoday’ssolutionsdonot

support multiple monitors in a seamless manner.

Bi-directional audio/video: Emerging multimedia applications like soft and IP phones or video •

conferencing clients do not work with existing virtual desktop and connection protocol solutions.

Peripheral support: Current solutions have limited support (if any) for connecting USB peripherals such •

as PDAs or storage devices to the client, and having them appear connected to the virtual desktop.

IT CHALLENGES WITH EXISTING RETROFITTED VIRTUAL DESKTOP SOLUTIONS

Inadditiontotheend-userchallenges,currentsolutionsaredifculttoimplementandmanagefroman

ITperspective.Thisisbecausemostexistingvirtualdesktopsolutionsareretrottedservervirtualization

solutions,andlacktheessentialfunctionalityrequiredforvirtualdesktops.Specically:

User experience and system load/economics: The user experience problem described above is not only •

a user problem, but also an IT problem. The reason for this is that if the user experience is not the same

or better than a physical PC, end-users will never accept it and will always escalate issues with IT. In

addition, RDP-based systems are very heavy on the host CPU, especially when processing multimedia.

This reduces the density of virtual desktops on a server, which in turn increases the overall system cost

becauseITneedsmoreserverstosupportagivennumberofvirtualdesktops.Thismakesretrotted

server virtualization solutions cost-prohibitive.

System scalability: Server virtualization solutions are designed to scale to hundreds of virtual servers, •

whereas virtual desktop products are required to scale in the thousands for production deployments.

Consider an example of an enterprise that has 100 virtual servers. This is a medium-to-large size

deployment. Using an industry average of 45-50 desktops per server, a similar scale deployment in the

desktop domain would be about 5,000 virtual desktops.

This means 5,000 images, 5,000 users, and 5,000 clients. Very quickly, this gets to be two orders

of magnitude larger in terms of the number of objects to manage. Hence, virtual desktops require a

virtualizationmanagementsystemdesignedtoscaletothousandsofvirtualmachines.Retrotted

server virtualization management systems simply cannot meet this requirement.

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Red Hat ENTERPRISE VIRTUALIZATION FOR DESKTOPS Manual de usuario Pagina 5