'Override ratio if necessary.
The over subscription ratio will be overridden if the user supplied
max oversubscription ratio is less than 1.
:param max_over_sub_ratio: user supplied over subscription ratio
:returns: max_over_sub_ratio'

@staticmethod
def get_default_oversubscription_ratio(max_over_sub_ratio):

    if (max_over_sub_ratio < 1.0):
        LOG.info('The    user    supplied    value    for    max_over_subscription    ratio    is    less    than    1.0.    Using    the    default    value    of    20.0    instead...')
        max_over_sub_ratio = 20.0
    return max_over_sub_ratio
