https://blueprints.launchpad.net/nova-powervm/+spec/file-io-driver
The PowerVM driver currently uses logical volumes for localdisk ephemeral storage. This blueprint will add support for using file-backed disks as a localdisk ephemeral storage option.
The PowerVM driver only supports logical volumes for localdisk ephemeral storage. It does not currently support storage that is presented as a file.
Add nova_powervm/virt/powervm/disk/fileio.py. This would extend the existing disk driver. Use the DISK_DRIVER powervm conf option to select file I/O. Will utilize the nova.conf option instances_path.
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Performance may change as the backing storage methods of VMs will be different.
The deployer must set the DISK_DRIVER conf option to fileio and ensure that the instances_path conf option is set in order to utilize the changes described in the blueprint.
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Novalink 1.0.0.5
Will update the nova-powervm dev-ref to include File I/O as an additional ephemeral disk option.
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