[ceph-users] Re: Hardware for new OSD nodes.

[Anthony D'Atri]

> 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.
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