The configurations for the XC Family devices—the XC740xd-24 and the XC640-10—are optimized for performance intensive VDI workloads. We selected the memory and CPU configurations that provides optimal performance. You can change these configurations to meet your own requirements. Keep in mind that changing the memory and CPU configurations from those that have been validated in this document will affect the user density per host.
In the Density Optimized configuration used in this testing we leveraged 2nd Generation Intel Xeon Scalable processors (Cascade Lake) which have in-hardware mitigations for Spectre (variant 2), Meltdown (variant 3), and L1 Terminal Fault side-channel methods. With mitigations in the hardware, the new processors provide better performance and user densities than first-generation Intel Xeon Scalable Processors (Skylake) or other previous generation processor-based VDI systems, which still require software-level fixes to protect against side-channel vulnerabilities. Vulnerabilities for which fixes are not available at hardware-level are mitigated through software-level fixes. Cascade Lake processors also come with an improved architecture and higher thermal efficiency that boosts the performance of the VDI system.
With the introduction of the six-channels-per-CPU requirement for Skylake and Cascade Lake, the server memory configuration recommendation has increased from the previous guidance of 512 GB to 768 GB. This change was necessary to ensure a balanced memory configuration and optimized performance for your VDI solution. The additional memory is advantageous, considering the resulting increase in operating system resource utilization and the enhanced experience for users when they have access to additional memory allocations.