Migrating Large ESXi VMs

wmadej

New Member
Oct 8, 2024
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I have a few virtual machines currently on ESXi that I need to move to my Proxmox server. These VMs are large, having multiple virtual disks, some of which are 2TB. The migration tool seems to be capped at 1Gbps, so migrating with the migration tool isn' really possible without incurring significant downtime. Is there an established best practice/workaround for moving large VMs from ESXi to Proxmox?
 
You can directly convert your .vmdk files to Proxmox-compatible .qcow2 or .raw formats. This bypasses the network bottleneck of the migration tool and should be faster. Use qemu-img convert to convert the disk, then transfer it to your Proxmox server using rsync or SCP.
Here are some references:
VMDK to QCOW2: https://www.vinchin.com/vm-migration/convert-vmdk-to-qcow2.html?s=13zfg8i8mk
VMware to Proxmox guide: https://www.vinchin.com/vm-migration/migrate-vmware-to-proxmox.html?s=yy939sy607