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)

	infos := make([]madmin.TierInfo, 0, len(ts))
	for tier, stats := range ts {

	m.Set(scannerVersionsScanned, float64(globalScannerMetrics.lifetime(scannerMetricApplyVersion)))

	dui, err := c.dataUsageInfo.Get()
	if err != nil {
		metricsLogIf(ctx, err)
	} else {
		m.Set(scannerLastActivitySeconds, time.Since(dui.LastUpdate).Seconds())
	}

	return nil

func (sys *BucketQuotaSys) GetBucketUsageInfo(ctx context.Context, bucket string) BucketUsageInfo {
	sys.Init(newObjectLayerFn())

	dui, err := bucketStorageCache.GetWithCtx(ctx)
	timedout := OperationTimedOut{}
	if err != nil && !errors.Is(err, context.DeadlineExceeded) && !errors.As(err, &timedout) {
		if len(dui.BucketsUsage) > 0 {

	dataUsageCacheName = ".usage-cache.bin"
)

// storeDataUsageInBackend will store all objects sent on the dui channel until closed.
func storeDataUsageInBackend(ctx context.Context, objAPI ObjectLayer, dui <-chan DataUsageInfo) {
	attempts := 1
	for dataUsageInfo := range dui {
		json := jsoniter.ConfigCompatibleWithStandardLibrary
		dataUsageJSON, err := json.Marshal(dataUsageInfo)
		if err != nil {

	objAPI, _ := validateAdminReq(ctx, w, r, policy.ListTierAction)
	if objAPI == nil {
		return
	}

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

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

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