return
	}

	r.PoolStats[poolIdx].update(bucket, fi)
}

const (
	rebalMetaName = "rebalance.bin"
	rebalMetaFmt  = 1
	rebalMetaVer  = 1
)

func (z *erasureServerPools) nextRebalBucket(poolIdx int) (string, bool) {
	z.rebalMu.RLock()
	defer z.rebalMu.RUnlock()

	r := z.rebalMeta
	if r == nil {
		return "", false
	}

	ps := r.PoolStats[poolIdx]
	if ps == nil {