usageTotalBytes               = "total_bytes"
	usageObjectsCount             = "count"
	usageVersionsCount            = "versions_count"
	usageDeleteMarkersCount       = "delete_markers_count"
	usageBucketsCount             = "buckets_count"
	usageSizeDistribution         = "size_distribution"
	usageVersionCountDistribution = "version_count_distribution"
)

var (

	ObjectVersionsHistogram map[string]uint64                `json:"objectsVersionsHistogram"`
	VersionsCount           uint64                           `json:"versionsCount"`
	DeleteMarkersCount      uint64                           `json:"deleteMarkersCount"`
	ReplicaSize             uint64                           `json:"objectReplicaTotalSize"`
	ReplicaCount            uint64                           `json:"objectReplicaCount"`

			continue
		}
		flat := d.flatten(*e)
		bui := BucketUsageInfo{
			Size:                    uint64(flat.Size),
			VersionsCount:           flat.Versions,
			ObjectsCount:            flat.Objects,
			DeleteMarkersCount:      flat.DeleteMarkers,
			ObjectSizesHistogram:    flat.ObjSizes.toMap(),
			ObjectVersionsHistogram: flat.ObjVersions.toMap(),
		}
		dst[bucket.Name] = bui
	}
	return dst
}

			clusterBuckets++
			clusterSize += usage.Size
			clusterObjectsCount += usage.ObjectsCount
			clusterVersionsCount += usage.VersionsCount
			clusterDeleteMarkersCount += usage.DeleteMarkersCount
			for k, v := range usage.ObjectSizesHistogram {
				v1, ok := clusterObjectSizesHistogram[k]
				if !ok {
					clusterObjectSizesHistogram[k] = v
				} else {
					v1 += v

				dataUsageInfo := cache.dui(dataUsageRoot, nil)
				erasureSet.ObjectsCount = dataUsageInfo.ObjectsTotalCount
				erasureSet.VersionsCount = dataUsageInfo.VersionsTotalCount
				erasureSet.DeleteMarkersCount = dataUsageInfo.DeleteMarkersTotalCount
				erasureSet.Usage = dataUsageInfo.ObjectsTotalSize
			}
		}
		erasureSet.RawCapacity += d.TotalSpace
		erasureSet.RawUsage += d.UsedSpace
		if d.Healing {