Which statement about CPU resource QoS in Huawei FusionCompute is incorrect?

The statement that CPU reservation sets a maximum resource limit is incorrect because, in the context of resource management in Huawei FusionCompute, CPU reservation is designed to guarantee a certain amount of CPU resources to a virtual machine or certain workloads. Rather than capping resource usage, it ensures that these reserved resources are always available to the VM, even in times of high demand from other VMs. This means that while a reservation specifies a minimum amount of CPU that a VM can use, it does not impose a cap or maximum limit on the total amount of CPU resources that can be utilized by that VM if there are resources available.

In contrast, CPU quota is the mechanism that sets a maximum limit on the resources a virtual machine can utilize, ensuring that it does not over-consume CPU resources beyond a specified threshold, especially in a multi-tenant environment where resource contention can occur. CPU shares define a relative priority for resource allocation, allowing for proportional access based on the share assigned to different workloads. Summaing, maintaining a clear understanding of these terms is crucial for effective resource management in cloud environments.