def recovery(self, index=None, params=None):
        """
        recovery is a view of shard replication.
        `<https://www.elastic.co/guide/en/elasticsearch/reference/current/cat-recovery.html>`_

        :arg index: A comma-separated list of index names to limit the returned
            information
        :arg bytes: The unit in which to display byte values, valid choices are:
            'b', 'k', 'kb', 'm', 'mb', 'g', 'gb', 't', 'tb', 'p', 'pb'
        :arg format: a short version of the Accept header, e.g. json, yaml
        :arg h: Comma-separated list of column names to display
        :arg help: Return help information, default False
        :arg master_timeout: Explicit operation timeout for connection to master
            node
        :arg s: Comma-separated list of column names or column aliases to sort
            by
        :arg v: Verbose mode. Display column headers, default False
        """
        return self.transport.perform_request('GET', _make_path('_cat',
            'recovery', index), params=params)