I have a virtual machine that created a snapshot. After logging into the CVM, I can find the disk files corresponding to the snapshot in the snapshot directory. However, the size of the snapshot file is equal to the size of the master disk, which is a complete replication, not generating a new file to store the increment. I added a file to the virtual machine and found that the modification was to the master disk, while the last modification date of the snapshot file did not change.
The underlying layer of AHV uses kvm, which can create an external snapshot through virsh.
Does AHV support creating external incremental snapshots