This was recently made less confusing by renaming the default crush
'pool' type to 'root'. Use this terminology everywhere as well.
This was not in argonaut, so perhaps this should delay being merged.
Signed-off-by: Josh Durgin <josh.durgin@inktank.com>
Conflicts:
doc/rados/operations/add-or-rm-osds.rst
doc/rados/operations/crush-map.rst