move VM from ext4 (PVE1) to ZFS (PVE2)

[PaulVM]

Hi,
Is there some fast way/tricks to move VMs from an old PVE 7.0 where they are stored as normale files to a new PVE 8.0 using ZFS (block evice)?
I suppose the simplier answer may be to use backup/restore, but I am searching for something like directly copy folder images because I have about 3 TB of VMs to transfer and I need to minimize the downtime.
In direct transfer I can have 6 Gbit (old PVE limit),
I have a PBS, but with a slow 1 Gbit connection.

I tried a dirty trick: created a Storage directory inside the ZFS disk and edited the vm conf file as needed.
It works, I can also then migrate the VM to another ZFS Storage (moved to another node of the cluster), but I am asking if tthere is some best options to achieve the same result and/or if this trick can create problems.

Thanks, P.

 

[LnxBil]

I suppose the simplier answer may be to use backup/restore

Yes it is.

moved to another node of the cluster

I don't understand if pve1 and pve2 are part of the same cluster or not.

 

[PaulVM]

Yes it is.

:-(
Time consuming ...

I don't understand if pve1 and pve2 are part of the same cluster or not.

No.
pve1 is in the old-cluster, pve2 is n the new-cluster

 

[LnxBil]

Time consuming ...

Sure... then you need a shared storage, e.g. NFS export from pve2 to pve1 and do a online disk migration and afterwards just shutdown the VM on pve1, copy the config to pve2, start and hope. Try with test clones first.