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I want to use both local (for better performance where it matters) and shared (for big slow disks) storage for a VM. Is it possible to live migrate such a VM?

If the storage was pure local, the migration command would be 

virsh migrate vm qemu+ssh://new.hv.ip --copy-storage-all

This would copy the disk images prior to migrating the VM.

If the storage was pure shared, then the --copy-storage-all option is not needed.

So, what if one disk is local and another is shared? Won't copy-storage-all corrupt the disk on shared storage?

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  • Rather than assign the shared storage via the hypervisor, why not use iSCSI and let the VM address/access it directly? The circumvents the whole problem.
    – HBruijn
    Oct 8, 2014 at 10:51

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