def parse_scaling(scaling_args):
    """Translate a list of scaling requests to a dict prefix:count."""
    scaling_args = scaling_args or []
    result = {}
    for item in scaling_args:
        key, values = item.split('=')
        values = values.split(',')
        value = int(values[0])
        blacklist = frozenset(int(v) for v in values[1:] if v)
        result[key + '0'] = value, blacklist
    return result