EarlyBert

In een recente white paper heeft Citrix de schaalbaarheid van een XenDesktop VDI-omgeving gemeten. Dat wil zeggen: hoeveel servers heb je nodig om een bepaald aantal desktops te kunnen bedienen. Daarbij is ook rekening gehouden met additionele servers, zoals die voor de connection broker en voor de provisioning.

Als conclusie wordt gemeld:

- The greatest limiting factor of the Windows XP desktop scalability testing documented in this paper was XenServer CPU utilization. More specifically, it is the high CPU spikes that always occurred during desktop startup or user login that directly correlated to a decrease in user experience on other active desktops.
- Tweaking Idle Pool and Desktop Group settings to eliminate desktop startups does not reduce CPU spikes. From the various tests, the CPU spikes remain consistent throughout any variations in idle pool configurations.
- Making use of XenApp to deliver published applications can provide an additional means of increased scalability. With up to 30 Users in the XP test results outlined above, desktop system performance did not hit a barrier as a result of heavy user workloads. Offloading CPU-intensive applications to a XenApp server allows for all users to still experience a fresh desktop and not be hindered by the workloads of others.
- The XenDesktop Environment Sizing Guide has been created using the results of these tests on singleserver scalability for the Desktop Delivery Controller, Provisioning Server, and XenServer. The number of desktops that a XenServer can support is dependent on user workload, hardware specifications, desktop software, application delivery method, and other factors.

Het 29-pagina’s tellend rapport is hier als PDF te downloaden.

Bron: Virtualization.info

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