We performed this test with the Login VSI Knowledge Worker workload on a 16-node compute cluster (see Table 4). We created the desktop VMs using VMware Horizon instant clone technology provisioned on PowerStore storage volumes with connectivity through NVMe/TCP. The VDI desktops used the VMware Horizon Blast Extreme display protocol. We populated each of the 16 compute hosts with 225 desktop VMs for a total of 3,600.
Login phase
The following figure shows the performance of the Dell PowerStore storage appliance during the login phase of Login VSI:
Steady-state phase
Once all the simulated users logged in and were performing their daily tasks, the load was still over 56K IOPS at 0.32 ms of system latency. The following figure shows the steady-state workload:
User experience
The baseline score for the Login VSI test was 610. This score falls in the 0 to 799 range rated as "Very Good" by Login VSI. For more information about Login VSI baseline ratings and baseline calculations, see VSImax baseline scores.
As indicated by the blue line in the following figure, the system reached a VSImax average score of 851 when 3,598 sessions were loaded. This value is well below the VSI threshold score of 1,610 set by the Login VSI tool.
During testing, VSImax was never reached, which typically indicates a stable system and a better user experience. The VSI Maximum response times increased considerably during the end of the test, indicating that there was a constraint on the computing resources. Login VSI metrics indicated that the constraint was not within the storage platform.
The Login VSImax user experience score for this test was not reached. When manually interacting with the sessions during the steady-state phase, the mouse and window movement were responsive, and video playback was good. No "stuck sessions" were reported during the testing, indicating that the system was not overloaded at any point. See Appendix A, which explains the Login VSI metrics.