globalTierConfigMgr = NewTierConfigMgr()

	globalTransitionState = newTransitionState(GlobalContext)
	globalSiteResyncMetrics = newSiteResyncMetrics(GlobalContext)
}

func configRetriableErrors(err error) bool {
	if err == nil {
		return false
	}

	notInitialized := strings.Contains(err.Error(), "Server not initialized, please try again") ||
		errors.Is(err, errServerNotInitialized)

	// Migrate storage format if needed.
	for {
		// Migrate IAM configuration, if necessary.
		if err := saveIAMFormat(retryCtx, sys.store); err != nil {
			if configRetriableErrors(err) {
				retryInterval := time.Duration(r.Float64() * float64(time.Second))
				logger.Info("Waiting for all MinIO IAM sub-system to be initialized.. possible cause (%v) (retrying in %s)", err, retryInterval)

						// A previous decommission running found restart it.
						for _, idx := range poolIndices {
							z.doDecommissionInRoutine(ctx, idx)
						}
						return
					}
					if configRetriableErrors(err) {
						decomLogIf(ctx, fmt.Errorf("Unable to resume decommission of pools %v: %w: retrying..", pools, err))
						time.Sleep(time.Second + time.Duration(r.Float64()*float64(5*time.Second)))
						continue
					}

	for {
		var err error
		bootstrapTrace(fmt.Sprintf("poolMeta.Init: loading pool metadata, attempt: %d", attempt), func() {
			err = z.Init(ctx) // Initializes all pools.
		})
		if err != nil {
			if !configRetriableErrors(err) {
				logger.Fatal(err, "Unable to initialize backend")
			}
			retry := time.Duration(r.Float64() * float64(5*time.Second))