What virtualization challenge is addressed by using dynamic resource allocation?

Dynamic resource allocation plays a significant role in addressing resource contention within a virtualization environment. Resource contention occurs when multiple virtual machines (VMs) compete for the same physical resources, such as CPU, memory, or storage. This competition can lead to performance degradation, as the demands of one VM might impact the availability of resources for another, resulting in slower response times and overall reduced efficiency.

By employing dynamic resource allocation, the virtualization platform can monitor the real-time performance and resource usage of VMs, adjusting resource distribution based on current needs. This means that if one VM requires more CPU or memory due to increased activity, resources can be dynamically reallocated from VMs that are less active. This not only helps to balance the load across the infrastructure but also maximizes the efficiency of resource usage, ultimately improving overall system performance and user experience.

While concepts like resource over-provisioning, under-utilization, and resource isolation are relevant to virtualization, the primary challenge that dynamic resource allocation specifically targets is the competition for resources that can lead to bottlenecks and performance issues among VMs.