RBDs in "cephfs_data"-Pool

[some-admins]

We wonder if we could just create a RBD-Storage using the "cephfs_data"-Pool. We would like to make the setup as flexible as possible, because we don't know yet how to split out storage capacity to RBDs and CephFS. Are there any downsides?

And how to decide on the relation of CephFS data/metadata?

 

[Alwin]

Are there any downsides?

Different sizing and tooling around RBD and Cephfs. Better not to mix them, it will make matters more complicated.

And how to decide on the relation of CephFS data/metadata?

Have you seen our docs already? See cephfs & also pgcalc.
https://pve.proxmox.com/pve-docs/chapter-pveceph.html