Ceph » CephFS

$ ceph osd pool create prod_meta
$ ceph osd pool create prod_data
$ ceph fs new prod prod_meta prod_data
$ ceph osd pool create backup_meta
$ ceph osd pool create backup_data
$ ceph fs new backup backup_meta backup_data
$ ceph fs add_data_pool prod backup_data
$ ceph-fuse -n client.admin --client_fs prod /mnt/prod
$ mkdir -p /mnt/prod/test/d{0,1}
$ sudo setfattr -n ceph.dir.layout.pool -v backup_data /mnt/prod/test/d1
$ ceph fs dump --format=json-pretty

verify the fs dump to see that the backup pool id is listed for both fs