Ceph pools size need to be improved

[Stepan Rogov]

Fuel 7.0
After deployment with the next parameters:
Ceph RBD for volumes (Cinder)
Ceph RBD for images (Glance)
Ceph RBD for ephemeral volumes (Nova)
Ceph RadosGW for objects (Swift API)

I have the next pools in ceph:
root@node-5:~# ceph df
GLOBAL:
    SIZE AVAIL RAW USED %RAW USED
    89367G 89366G 982M 0
POOLS:
    NAME ID USED %USED MAX AVAIL OBJECTS
    data 0 0 0 44683G 0
    metadata 1 0 0 44683G 0
    rbd 2 0 0 44683G 0
    images 3 12976k 0 44683G 5
    volumes 4 0 0 44683G 1
    backups 5 0 0 44683G 0
    .rgw.root 6 840 0 44683G 3
    .rgw.control 7 0 0 44683G 8
    .rgw 8 0 0 44683G 0
    .rgw.gc 9 0 0 44683G 32
    .users.uid 10 564 0 44683G 2
    .users 11 42 0 44683G 3
    compute 12 0 0 44683G 2

It seems, there is too much space for the next pools: .rgw*, .users*, data, metadata, rbd.
Also it seems that we can remove the default ceph pools(data, metadata).
I propose to calculate somehow optimal pools size during a deployment process (in the general case for most users) and remove unusable pools (if it is possible).