GlusterFS?

This will not be fast as local device passed-through to the vm

It will also be problematic, since all hosts will mount, monitor, and maintain leases on this NFS storage, since it is considered as shared storage.

If another host fail to access this NFS storage the other host will be deactivated and all the VMs will migrate to other hosts. This migration storm can cause lot of trouble.

In the worst case, in no other host can access this NFS storage all other hosts will be deactivated.

This is same as NFS (internally this is the same code). It will work only if you can mount the same device/export on all hosts. This is even worse than NFS.

A. Am I barking at the wrong tree here? Is this setup even possible?

This is possible using host device.

You can attach a host device to a VM. This will pin the VM to the host, and give best performance.

It may not be flexible enough since you need to attach entire device. Maybe it can work with LVM logical volumes.

Nir

B. If it is even possible, any documentation / pointers on setting up
per-host private storage?

I should mention that these workstations are quite beefy (64-128GB
RAM, large MDRAID, SSD, etc) so I can spare memory / storage space (I
can even split the local storage and GFS to different arrays).

- Gilboa
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