I was manually migrating a VM in vcenter from one modern host to another and it was blazing fast, at around 800Mb/s. I tried to clone another VM in the opposite direction, but between the two same hosts and it was much slower at around 200Mb/s.
So I am wondering, is cloning for some reason slower the migrating? And if so, note that the only reason I chose to clone was I was worried that I may need to cancel the process before it had completed. So my second question is, can a manual migration be canceled part of the way through the process without messing up the VM at its original location? IE, at what point during the migration does it delete the machine from its original destination? I am worried that a cancel migration will leave two botched VM fragments on 2 hosts, with both of them being somehow incomplete and unusable.
Note, I needed the option to cancel the process and the the second VM needed to be backup in within 1.5 hours, and if not, I had to be able to back out of it.