Ceph » rgw

If we reshard versioning bucket, bucket stats will contain extra information `rgw.none`.
Before reshard：

"mtime": "2019-07-16T09:39:07.175539Z",
    "max_marker": "0#,1#,2#",
    "usage": {
        "rgw.main": {
            "size": 2,
            "size_actual": 4096,
            "size_utilized": 2,
            "size_kb": 1,
            "size_kb_actual": 4,
            "size_kb_utilized": 1,
            "num_objects": 1
        }
    },

After reshard：

"mtime": "2019-07-17T02:36:12.490795Z",
    "max_marker": "0#,1#,2#,3#,4#",
    "usage": {
        "rgw.none": {
            "size": 0,
            "size_actual": 0,
            "size_utilized": 0,
            "size_kb": 0,
            "size_kb_actual": 0,
            "size_kb_utilized": 0,
            "num_objects": 1
        },
        "rgw.main": {
            "size": 2,
            "size_actual": 4096,
            "size_utilized": 2,
            "size_kb": 1,
            "size_kb_actual": 4,
            "size_kb_utilized": 1,
            "num_objects": 1
        }
    },

Versioning bucket has idx like below and it's counted in stats while resharding bucket.

"type": "plain",
        "idx": "obj10",
        "entry": {
            "name": "obj10",
            "instance": "",
            "ver": {
                "pool": -1,
                "epoch": 0
            },
            "locator": "",
            "exists": "false",
            "meta": {
                "category": 0,
                "size": 0,
                "mtime": "0.000000",
                "etag": "",
                "storage_class": "",
                "owner": "",
                "owner_display_name": "",
                "content_type": "",
                "accounted_size": 0,
                "user_data": "",
                "appendable": "false" 
            },
            "tag": "",
            "flags": 8,
            "pending_map": [],
            "versioned_epoch": 0
        }