~/ceph/build $ bin/radosgw-admin bucket layout --bucket testbucket
{
    "layout": {
        "resharding": "None",
        "current_index": {
            "gen": 0,
            "layout": {
                "type": "Normal",
                "normal": {
                    "num_shards": 11,
                    "hash_type": "Mod"
                }
            }
        },
        "logs": [
            {
                "gen": 0,
                "layout": {
                    "type": "InIndex",
                    "in_index": {
                        "gen": 0,
                        "layout": {
                            "num_shards": 11,
                            "hash_type": "Mod"
                        }
                    }
                }
            }
        ]
    }
}