for index, client := range sys.peerClients {
		client := client
		ng.Go(ctx, func() error {
			if client == nil {
				return errPeerNotReachable
			}
			bsMap, err := client.GetAllBucketStats(ctx)
			if err != nil {
				return err
			}
			replicationStats[index] = bsMap
			return nil
		}, index, *client.host)
	}
	for _, nErr := range ng.Wait() {