this should be possible by specifying a "data_devices" and "db_devices" fields in the OSD spec file each with different filters. There's some examples in the docs https://docs.ceph.com/en/latest/cephadm/services/osd/#the-simple-case that show roughly how that's done, and some other sections ( https://docs.ceph.com/en/latest/cephadm/services/osd/#filters) that go more in depth on the different filtering options available so you can try and find one that works for your disks. You can check the output of "ceph orch device ls --format json | jq" to see things like what cephadm considers the model, size etc. for the devices to be for use in the filtering. On Wed, Aug 23, 2023 at 1:13 PM Satish Patel <satish.txt@gmail.com> wrote:
Folks,
I have 3 nodes with each having 1x NvME (1TB) and 3x 2.9TB SSD. Trying to build ceph storage using cephadm on Ubuntu 22.04 distro.
If I want to use NvME for Journaling (WAL/DB) for my SSD based OSDs then how does cephadm handle it?
Trying to find a document where I can tell cephadm to deploy wal/db on nvme so it can speed up write optimization. Do I need to create or cephadm will create each partition for the number of OSD?
Help me to understand how it works and is it worth doing? _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-leave@ceph.io