fstats := stat.FailStats.merge(oldst.FailStats)
			lrg := oldst.XferRateLrg.merge(*stat.XferRateLrg)
			sml := oldst.XferRateSml.merge(*stat.XferRateSml)
			stats[arn] = &BucketReplicationStat{
				Failed:          fstats.toMetric(),
				FailStats:       fstats,
				ReplicatedSize:  stat.ReplicatedSize + oldst.ReplicatedSize,
				ReplicatedCount: stat.ReplicatedCount + oldst.ReplicatedCount,
				Latency:         stat.Latency.merge(oldst.Latency),