Is this right? 1. Define the area where the Hypervisor OS will be installed on the SSD Raid1 2. Partition the disk 3. Using lvm as part of gluster brick cache If what I understand is correct, configuration is possible but not recommended. When the volume has a lot of I / O, it can cause problems with the hypervisor. (Response delay, etc.) I have shed blood sweat & tears. If you want to use lvcache, be sure to use a separate flash disk. Never use NVMe. It has its own limit (bottleneck) and does not enjoy the benefits of nvme.