async def cluster_require_full_coverage(self, nodes_cache):
        """
        if exists 'cluster-require-full-coverage no' config on redis servers,
        then even all slots are not covered, cluster still will be able to
        respond
        """
        nodes = nodes_cache or self.nodes

        async def node_require_full_coverage(node):
            r_node = self.get_redis_link(host=node['host'], port=node['port'])
            node_config = await r_node.config_get('cluster-require-full-coverage')
            return 'yes' in node_config.values()

        # at least one node should have cluster-require-full-coverage yes
        for node in nodes.values():
            if await node_require_full_coverage(node):
                return True
        return False
if exists 'cluster-require-full-coverage no' config on redis servers,
        then even all slots are not covered, cluster still will be able to
        respond