// TierStats contains per-tier stats of all configured remote tiers
	TierStats *allTierStats `json:"tierStats,omitempty"`
}

func (dui DataUsageInfo) tierStats() []madmin.TierInfo {
	if dui.TierStats == nil {
		return nil
	}

	if globalTierConfigMgr.Empty() {
		return nil
	}

	ts := make(map[string]madmin.TierStats)
	dui.TierStats.populateStats(ts)

	}
}

func BenchmarkMarshalMsgtierStats(b *testing.B) {
	v := tierStats{}
	b.ReportAllocs()
	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		v.MarshalMsg(nil)
	}
}

func BenchmarkAppendMsgtierStats(b *testing.B) {
	v := tierStats{}
	bts := make([]byte, 0, v.Msgsize())
	bts, _ = v.MarshalMsg(bts[0:0])
	b.SetBytes(int64(len(bts)))
	b.ReportAllocs()

package cmd

import (
	"time"

	"github.com/minio/madmin-go/v3"
)

//go:generate msgp -file=$GOFILE -unexported

type lastDayTierStats struct {
	Bins      [24]tierStats
	UpdatedAt time.Time
}

func (l *lastDayTierStats) addStats(ts tierStats) {
	now := time.Now()
	l.forwardTo(now)

	nowIdx := now.Hour()
	l.Bins[nowIdx] = l.Bins[nowIdx].add(ts)
}

	if err != nil {
		writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
		return
	}

	tierStats := dui.tierStats()
	dailyStats := globalNotificationSys.GetLastDayTierStats(ctx)
	tierStats = dailyStats.addToTierInfo(tierStats)

	data, err := json.Marshal(tierStats)
	if err != nil {
		writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
		return
	}

			NumObjects:  st.NumObjects,
		}
	}
	return
}

// tierStats holds per-tier stats of a remote tier.
type tierStats struct {
	TotalSize   uint64 `msg:"ts"`
	NumVersions int    `msg:"nv"`
	NumObjects  int    `msg:"no"`
}

func (ts tierStats) add(u tierStats) tierStats {
	return tierStats{
		TotalSize:   ts.TotalSize + u.TotalSize,
		NumVersions: ts.NumVersions + u.NumVersions,

	}
	cinfo.UserDefined = make(map[string]string, len(o.UserDefined))
	for k, v := range o.UserDefined {
		cinfo.UserDefined[k] = v
	}
	return cinfo
}

func (o ObjectInfo) tierStats() tierStats {
	ts := tierStats{
		TotalSize:   uint64(o.Size),
		NumVersions: 1,
	}
	// the current version of an object is accounted towards objects count
	if o.IsLatest {
		ts.NumObjects = 1
	}
	return ts
}

				err = msgp.WrapError(err, "Tiers")
				return
			}
			if z.Tiers == nil {
				z.Tiers = make(map[string]tierStats, zb0002)
			} else if len(z.Tiers) > 0 {
				for key := range z.Tiers {
					delete(z.Tiers, key)
				}
			}
			for zb0002 > 0 {
				zb0002--
				var za0001 string
				var za0002 tierStats
				za0001, err = dc.ReadString()
				if err != nil {
					err = msgp.WrapError(err, "Tiers")
					return
				}

					}
				}
			} else {
				ts := tierStats{
					TotalSize:   uint64(task.objInfo.Size),
					NumVersions: 1,
				}
				if task.objInfo.IsLatest {
					ts.NumObjects = 1
				}
				t.addLastDayStats(task.event.StorageClass, ts)
			}
			t.activeTasks.Add(-1)
		}
	}
}

func (t *transitionState) addLastDayStats(tier string, ts tierStats) {
	t.lastDayMu.Lock()
	defer t.lastDayMu.Unlock()

		for _, tier := range globalTierConfigMgr.ListTiers() {
			if sizeS.tiers == nil {
				sizeS.tiers = make(map[string]tierStats)
			}
			sizeS.tiers[tier.Name] = tierStats{}
		}
		if sizeS.tiers != nil {
			sizeS.tiers[storageclass.STANDARD] = tierStats{}
			sizeS.tiers[storageclass.RRS] = tierStats{}
		}

		done := globalScannerMetrics.time(scannerMetricApplyAll)

	failedSize      int64
	replicaSize     int64
	replicaCount    int64
	pendingCount    uint64
	failedCount     uint64
	replTargetStats map[string]replTargetSizeSummary
	tiers           map[string]tierStats
}

// replTargetSizeSummary holds summary of replication stats by target
type replTargetSizeSummary struct {
	replicatedSize  int64
	replicatedCount int64
	pendingSize     int64
	failedSize      int64