5000 Persistent User Scale out Test with Citrix XenDesktop and Atlantis Computing
This paper documents persistent desktop scale out performance testing that was done at the Lenovo solution lab in Austin, Texas. The goal was to test 5000 persistent desktops by using a combination of Lenovo® servers and networking, IBM® FlashSystem™ storage, and Atlantis Computing® software.
This paper includes the following sections:
- Section 1 describes the hardware and software components that were used in the Lenovo Client Virtualization (LVC) solution for Citrix XenDesktop.
- Section 2 describes the methodology and tools that were used for the scale out performance test including Login VSI.
- Section 3 describes the hardware configuration that was used.
- Section 4 describes the software configuration that was used.
- Section 5 describes the performance results.
The Lenovo results show a best in class achievement of 5000 persistent desktops with Citrix XenDesktop.
This type of result has not been documented before, partly because 5000 persistent desktops require a significant investment in storage. However, as shown in this paper, a combination of Atlantis Computing software and IBM FlashSystem storage turns the usual I/O performance problem into a non-event. Without data reduction technology, enterprise class flash storage can be expensive. The Atlantis Computing de-duplication and compression facilities make it cost effective (the storage cost for 5000 users is less than $130 per user, including the Atlantis license). Moreover, the performance of logging onto a desktop in 16 seconds and rebooting 5000 desktops in 20 minutes makes this system easy to use for users and IT staff.
A total of 35 Lenovo Flex System servers in 30U were used to support 5000 users with up to 160 persistent users per server. The Lenovo servers provide a dense and cost effective solution in terms of CAPEX and OPEX. The performance results show that the usual persistent desktop I/O problem was effectively eliminated and the compute server performance is the driving factor. More compute servers can be added to support more users or more compute intensive users; it all depends on the individual customer environment and user load.
For more information about the Lenovo Client Virtualization solution for Citrix XenDesktop, contact your Lenovo sales representative or business partner. For more information about the Citrix XenDesktop reference architecture that includes information on the LCV solution, performance benchmarks, and recommended configurations, see this website: http://lenovopress.com/tips1278.