nSets := make([]int, len(z.serverPools))
	g := errgroup.WithNErrs(len(z.serverPools))
	for index := range z.serverPools {
		index := index
		// Skip suspended pools or pools participating in rebalance for any new
		// I/O.
		if z.IsSuspended(index) || z.IsPoolRebalancing(index) {
			continue
		}
		pool := z.serverPools[index]
		nSets[index] = pool.setCount
		g.Go(func() error {