code: def set_pool_quota(service, pool_name, max_bytes=None, max_objects=None):
      
      cmd = ['ceph', '--id', service, 'osd', 'pool', 'set-quota', pool_name]
      if max_bytes:
          cmd = cmd + ['max_bytes', str(max_bytes)]
      if max_objects:
          cmd = cmd + ['max_objects', str(max_objects)]
      check_call(cmd)
docs: :param service: The Ceph user name to run the command under
      :type service: str
      :param pool_name: Name of pool
      :type pool_name: str
      :param max_bytes: Maximum bytes quota to apply
      :type max_bytes: int
      :param max_objects: Maximum objects quota to apply
      :type max_objects: int
      :raises: subprocess.CalledProcessError