Faking an offloaded file copy/move

[vitaprimo]

I'm just finishing making huge changes on the network, part of it was renaming all of my VMs. As you might know, renaming a VM in vCenter or ESXi doesn't actually rename the file, Storage vMotion (what they call moving it from one datastore to another) does, this is ridiculous but it's nothing compared to Hyper-V's file structure, I promise. :)

Anyway, I need to move VMs, but it makes no sense rewriting huge (<-- all caps) amounts of data to change a filename and speaking of making sense--the command used for it! It's confusing and with data loss potential. My next option, I'm not sure it's an option: leveraging ZFS' insane toolset, it already has vSphere fooled on how much storage is using and by a big margin thanks to LZ4; I'm hoping there's something I can do, like creating another zvol, same server same pool and start the migration from zvol-to-zvol, iSCSI-SAN-datastore-A-to-samesies-B from vCenter's PoV (or ESXi if it needs to be something a littler "dumber") so it thinks it's doing a hardware-accelerated copy but FreeNAS just remaps the file taking like a second avoiding wear. Is there such a thing?

Thanks.

Irrelevant-ish:
IDK if it matters for what I'm trying to do but FreeNAS is connected to ESXi (the snapshots thing). It was to vCenter but FreeNAS itself has allowed getting rid of vSAN storage awesome but overkill for us, we downsized to a just two servers and vCenter is not really needed so it's shut down. Also less-needed is cooling, you can actually be in the server room for a little while now, it went from ice-cube-cold to just-f**king-freezing. :D