for k := range config.drivercache {
		delete(config.drivercache, k)
	}
	// Remove existing tier configs
	for k := range config.Tiers {
		delete(config.Tiers, k)
	}
	// Copy over the new tier configs
	for tier, cfg := range newConfig.Tiers {
		config.Tiers[tier] = cfg
	}
	config.lastRefreshedAt = UTCNow()
	return nil
}

// Save saves tier configuration onto objAPI

// tiers.
type allTierStats struct {
	Tiers map[string]tierStats `msg:"ts"`
}

func newAllTierStats() *allTierStats {
	return &allTierStats{
		Tiers: make(map[string]tierStats),
	}
}

func (ats *allTierStats) addSizes(tiers map[string]tierStats) {
	for tier, st := range tiers {
		ats.Tiers[tier] = ats.Tiers[tier].add(st)
	}
}

		}

		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{}
			sizeS.tiers[storageclass.RRS] = tierStats{}
		}

		done := globalScannerMetrics.time(scannerMetricApplyAll)

	pendingSize     int64
	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

Costinescu, Andrei Nigmatulin, Andrew Erlichson, Andrew Myers, Andrew Stepanov,
Androbin, AngryPowman, Anish Shah, Anton Daitche, Artsiom Chapialiou, asdf2014,
Aseem Raj Baranwal, Ash Hall, Bart Kiers, Batchu Venkat Vishal, ben, Ben
Barsdell, Bill Piel, Carl Thomé, Catalin Voss, Changming Sun, Chengzhi Chen, Chi
Zeng, Chris Antaki, Chris Donahue, Chris Oelmueller, Chris Tava, Clayne Robison,