Which function should be enabled to allow virtual machines to migrate between CNA hosts with different CPU models in Huawei FusionCompute?

The function that should be enabled to allow virtual machines to migrate between CNA hosts with different CPU models in Huawei FusionCompute is the Cluster IMC Policy. This policy is specifically designed to facilitate the migration of virtual machines across nodes that may have varying CPU architectures or capabilities.

When the Cluster IMC Policy is enabled, it ensures that the compatibility of CPU instructions between different physical hosts is managed effectively, enabling seamless live migration of VMs. This is essential in cloud environments where resources might need to be allocated dynamically across different hosts with varied hardware configurations.

Other options, while they may have their specific purposes related to performance optimization or resource management, do not directly address the requirement for CPU compatibility during VM migration. For instance, the Cluster GuestNUMA Policy optimizes the memory access patterns of VMs based on Non-Uniform Memory Access architecture, which is not focused on handling CPU model differences. Similarly, Cluster I/O ring adaptation and Cluster HANA Optimization have particular roles concerning I/O performance and database optimizations, respectively, rather than facilitating the migration of virtual machines across different CPU architectures.