What image format (QCOW2 vs RAW) and storage format (LVM block vs ext4 file)?
I am setting up a CentOS v7 KVM node. Looks like I will probably be using Virtualizor as the control panel. What is the the best all-around storage configuration?
Right now I am leaning towards QCOW2 on ext4 file system just saving it in a directory. Perhaps a bit of a performance hit but I will be using SSD RAID 1 so should not be too bad. The advantage is it's simple, supports thin provisioning, snapshots, and migration.
Perhaps a bit slower is the only downside I can see. I already have a node running RAW images on LVM block storage and it's a bit more involved for administration. We have never had a need to add disks to a physical server which where LVM could potentially have an advantage. Some things are a bit of a pain like backups. We don't use thin provisioning because I don't think Solus had that option at the time or maybe it didn't work well at that time. So backups are full size.