27 May
2025
27 May
'25
10:43 p.m.
On May 27, 2025, at 6:05 PM, Ryan Rempel <rgrempel@cmu.ca> wrote:
Where ceph-hvcore1 is my host, /dev/sdb is the spinning disk, and /dev/mapper/nvmepool-dbwal.26 is the path to the LVM logical volume I had created on the SSDs (well, actually, NVMe,
Remember that NVMe devices *are* SSDs ;)
but I'm passing it through to a ceph VM, so ceph doesn't see its full character).
That layer does impact performance, but you can use a udev rule to override the kernel’s rotational attribute on the device if you feel it’s faster than an HDD, which will influence certain Ceph option settings.