Hi Guys,
I'm svMotioning VMs between an NFS datastore and an iSCSI one and noticed that the process takes ages. All vmdk's are thin across the board.
I noticed that the network usage on the host is very high (to the point of link saturation). It seems that the "used" space of the VM is being ignored and the storage vMotion is actually migrating the provisioned size of the VM instead!
As an example:
A VM could have a 500GB Thin disk with 3GB in use. I see 500GB get sent across the network from the NFS appliance and then only 3GB gets sent onto the iSCSI device....
How can I live migrate VM's from one to the other but only have the "in-use" data transferred? This would be MUCH faster than what I'm enduring at the moment.