metadata = make(map[string]string)
	}

	etag := strings.TrimSpace(hdr.Get(xhttp.MinIOSourceETag))
	if crypto.S3KMS.IsRequested(hdr) {
		keyID, context, err := crypto.S3KMS.ParseHTTP(hdr)
		if err != nil {
			return ObjectOptions{}, err
		}
		sseKms, err := encrypt.NewSSEKMS(keyID, context)
		if err != nil {
			return ObjectOptions{}, err
		}
		op := ObjectOptions{
			ServerSideEncryption: sseKms,

	PercentFreeGoal float64            `msg:"pf"`     // Computed from total free space and capacity at the start of rebalance
	PoolStats       []*rebalanceStats  `msg:"rss"`    // Per-pool rebalance stats keyed by pool index
}

var errRebalanceNotStarted = errors.New("rebalance not started")

func (z *erasureServerPools) loadRebalanceMeta(ctx context.Context) error {
	r := &rebalanceMeta{}