The Local Persistent Volumes are not quite ready for things like DB workloads. They still require manual work to be done before they can be used. So if you plan on using them you need to configure your servers and manually create the PV objects, and you need to do some configuration to make sure disks are the correct sizes since there is not dynamic packing for smaller DB's.

There was talk earlier about using LVM to be able to really provide a Local PV that is like the network attached PV's, but it doesn't look like that landed yet