prometheus.NewDesc(
				prometheus.BuildFQName(bucketNamespace, "objects", "count"),
				"Total number of objects in a bucket",
				[]string{"bucket"}, nil),
			prometheus.GaugeValue,
			float64(usageInfo.ObjectsCount),
			bucket,
		)
		ch <- prometheus.MustNewConstMetric(
			prometheus.NewDesc(
				prometheus.BuildFQName("bucket", "replication", "successful_size"),
				"Total capacity replicated to destination",

		e := d.find(bucket.Name)
		if e == nil {
			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
	}

		clusterVersionsHistogram := map[string]uint64{}
		for _, usage := range dataUsageInfo.BucketsUsage {
			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 {

			cache := dataUsageCache{}
			if err := cache.load(ctx, z.serverPools[d.PoolIndex].sets[d.SetIndex], dataUsageCacheName); err == nil {
				dataUsageInfo := cache.dui(dataUsageRoot, nil)
				erasureSet.ObjectsCount = dataUsageInfo.ObjectsTotalCount
				erasureSet.VersionsCount = dataUsageInfo.VersionsTotalCount
				erasureSet.DeleteMarkersCount = dataUsageInfo.DeleteMarkersTotalCount