Yeah, didn't think about a RAID10 really, although
there wouldn't be enough space for 8x300GB = 2400GB WAL/DBs.
300 is overkill for many applications anyway.
Also, using a RAID10 for WAL/DBs will:
- make OSDs less movable between hosts (they'd have to be moved all together -
with 2 OSD per NVMe you can move them around in pairs
Why would you want to move them between hosts?
- You must really be sure your raid card is
dependable. (sorry but I have seen so much management problems with top-tier RAID cards I
avoid them like the plague).
This.