Just a note on db_slots, I don’t think it has ever worked properly,
and last time I checked it still wasn’t implemented
(https://www.spinics.net/lists/ceph-users/msg83189.html).
This option should probably be entirely removed from the docs, unless
it’s coming soon.
Zitat von Anthony D'Atri <[email protected]>:
On May 27, 2025, at 6:05 PM, Ryan Rempel <[email protected]> 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.
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