Thanks for the answer, I hoped that, but I cannot figure out how to configure it. There is an option in DriveGroupSpecs which is data_directories : "A list of strings which should back OSDs" Is this the right option? How do I do this with "ceph orch daemon add osd host:...." ? Thanks Michael Am Freitag, 3. April 2020, 10:14:29 CEST schrieb Janne Johansson:

Den fre 3 apr. 2020 kl 10:11 skrev Micha <micha-1@fantasymail.de>:

...

I want to try using object storage with java. Is it possible to set up osds with "only" directories as data destination (using cephadmin) , instead of whole disks? I have read through much of the docu but didn't found how to do it (if it's possible).

I think filestore OSDs can run from a dir. Whether or not a deployment tool/script will help you I don't know, but should not be a showstopper to make your own script to create them if need be.

Am Freitag, 3. April 2020, 10:50:57 CEST schrieb Janne Johansson:

Now, what I meant, but perhaps didn't write was: 1. Bluestore is default, Filestore was the older version, not default anymore. 2. Filestore of course used whole drives, partitions or LVM volumes but could be made to use a dir, if you did some work yourself. 3. ceph orch ... <- from Octopus, meaning recent, meaning that it would not be a huge shocker if the deprecated non-default filestore type itself in deprecated non-default mode did not come with a "can I just type 'a b c' and some other part does it all for me?"

If you want to be 2-3 steps away from recommended, default, recent I think you will have to step up to the task. Look up how people did it some 4-5-6 major releases ago, when filestore was the only option.

ok, I don't like the deprecated way. I think I will setup a virtual machine to test it, it seems for this case the better way. Cheers Michael