def setup
      ODBA.storage.setup
      self.indices.each_key { |index_name|
        ODBA.storage.ensure_target_id_index(index_name)
      }
      create_deferred_indices
      nil
    end
def setup
      ODBA.storage.setup
      self.indices.each_key { |index_name|
        ODBA.storage.ensure_target_id_index(index_name)
      }
      create_deferred_indices
      nil
    end
Create necessary DB-Structure / other storage-setup