Which statement is true about the dependency of DPM in Huawei FusionCompute?

The statement that DPM must always use DRS before it can function is true because DPM, or Distributed Power Management, relies on the capabilities of DRS, which stands for Distributed Resource Scheduler. DRS is responsible for load balancing and resource allocation across virtual machines within a cluster.

For DPM to effectively manage the power state of hosts in the FusionCompute environment, it requires the workload balancing and resource optimization functionalities provided by DRS. This integration allows DPM to make informed decisions about power management, such as placing hosts into sleep mode or waking them up based on current resource demands. Without DRS actively managing workloads, DPM would not have the necessary context to understand when and how to adjust host power statuses. Thus, the dependency on DRS is essential for DPM to perform its role effectively in optimizing power usage within a virtualized infrastructure.