if config == nil {
		return true
	}
	return len(config.ListTiers()) == 0
}

// TierType returns the type of tier
func (config *TierConfigMgr) TierType(name string) string {
	config.RLock()
	defer config.RUnlock()

	cfg, ok := config.Tiers[name]
	if !ok {
		return "internal"
	}
	return cfg.Type.String()
}

// ListTiers lists remote tiers configured in this deployment.

	ctx := r.Context()

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

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

		metaDataPoolPut(buf)
		if err != nil {
			res["err"] = err.Error()
			return sizeSummary{}, errSkipFile
		}

		sizeS := sizeSummary{}
		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{}