Jason, Using partitions won't get you into trouble, but depending on the version of Ceph you are using, you may want to leverage LVM instead of partitions. For our Filestore cluster, we had two partitions on NVMe to get more performance and it worked fine. I'm using LVM to carve out NVMe drives for RocksDB and then an NVMe pool for CephFS metadata. The problem with some of these configurations is that the tools don't set them up well, so I did the partitioning/LVM setup with a script I wrote, then just had Ceph use the final partition/LV. Hope that helps, Robert LeBlanc ---------------- Robert LeBlanc PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1 On Sat, Jul 25, 2020 at 8:59 AM Jason Borden <jason@xxxxxxxxxxxxxxxxx> wrote: > > Greetings, > > I have a question regarding the use of cephadm and disk partitions. I have noticed that the cephadm documentation mentions that a device cannot have partitions to be considered "available" for use. In my situation I don't want to use a device with partitions, but rather a partition itself as an osd. I've noticed that partitions do not show up when using `ceph orch device ls`. I've also noticed that partitions can still be used as osds by running something like `ceph orch daemon add osd node1:/dev/sda4`. My question is should I? Am I going to run into trouble by using a partition for an osd instead of a full device? > > Thanks, > Jason > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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