Which action takes effect immediately in Huawei FusionCompute?

The action that takes effect immediately in Huawei FusionCompute is the removal of the network card. When a network card is removed from a virtual machine, it disconnects that virtual machine from the network resources without requiring any additional steps or operations. This immediate effect is critical in virtualization environments where managing network connectivity swiftly can be vital for operational efficiency.

In contrast, other actions listed may require additional time to process or may not be instantaneous due to dependencies or additional configurations needed. For example, reading and writing directly to a newly bound disk typically involves ensuring that the disk is properly initialized and recognized by the system, which can take some time. Installing tools may necessitate reboots or confirmations, thereby delaying the effect. Disk capacity reduction often necessitates potential data migration or system adjustments, making it a more complex operation that doesn't take effect immediately.