} else {
			atomic.AddUint64(&v.HeadFailedTotal, 1)
			atomic.AddUint64(&p.srProxyStats.HeadFailedTotal, 1)
		}
	case getObjectAPI:
		if !isErr {
			atomic.AddUint64(&v.GetTotal, 1)
			atomic.AddUint64(&p.srProxyStats.GetTotal, 1)
		} else {
			atomic.AddUint64(&v.GetFailedTotal, 1)
			atomic.AddUint64(&p.srProxyStats.GetFailedTotal, 1)
		}
	default:
		return
	}
	p.bucketStats[bucket] = v
}

}

func (rl *ReplicationLastMinute) String() string {
	t := rl.LastMinute.getTotal()
	return fmt.Sprintf("ReplicationLastMinute sz= %d, n=%d , dur=%d", t.Size, t.N, t.Total)
}

func (rl *ReplicationLastMinute) getTotal() AccElem {
	return rl.LastMinute.getTotal()
}

// ReplicationLastHour keeps track of replication counts over the last hour
type ReplicationLastHour struct {

			}
		case "rtc":
			z.RmvTagTotal, err = dc.ReadUint64()
			if err != nil {
				err = msgp.WrapError(err, "RmvTagTotal")
				return
			}
		case "gc":
			z.GetTotal, err = dc.ReadUint64()
			if err != nil {
				err = msgp.WrapError(err, "GetTotal")
				return
			}
		case "hc":
			z.HeadTotal, err = dc.ReadUint64()
			if err != nil {
				err = msgp.WrapError(err, "HeadTotal")
				return
			}

	avg     time.Duration
	peak    time.Duration
	N       int64
}

func (l *latencyStat) update(d time.Duration) {
	l.lastmin.add(d)
	l.N++
	if d > l.peak {
		l.peak = d
	}
	l.curr = l.lastmin.getTotal().avg()
	l.avg = time.Duration((int64(l.avg)*(l.N-1) + int64(l.curr)) / l.N)
}

// epHealth struct represents health of a replication target endpoint.
type epHealth struct {
	Endpoint        string

	atomic.AddInt64(&acc.Size, sz)
}

// total returns the total call count and latency for the last minute.
func (e *lockedLastMinuteLatency) total() AccElem {
	e.mu.Lock()
	defer e.mu.Unlock()
	return e.getTotal()
}

func newXLStorageDiskIDCheck(storage *xlStorage, healthCheck bool) *xlStorageDiskIDCheck {
	xl := xlStorageDiskIDCheck{
		storage:      storage,
		health:       newDiskHealthTracker(),