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Important
Do not delete .avhd files directly from the storage location.
considerations, when using snapshots
- The presence of a virtual machine snapshot reduces the disk performance of the virtual machine.
- When you delete a snapshot, the .avhd files that store the snapshot data remain in the storage location until the virtual machine is shut down, turned off, or put into a saved state.
- We do not recommend using snapshots on virtual machines that provide time-sensitive services, or when performance or the availability of storage space is critical.
see these type of considerations
// for KVM, only allow snapshot with memory when VM is in running state
if (userVmVo.getHypervisorType() == HypervisorType.KVM && userVmVo.getState() == State.Running && !snapshotMemory) {
throw new InvalidParameterValueException("KVM VM does not allow to take a disk-only snapshot when VM is in running state");
}