// such that finally fivs.Versions has
	// all the non-free versions and fivs.FreeVersions has all the free
	// versions.
	n := 0
	for _, fi := range fivs.Versions {
		// filter our tier object delete marker
		if fi.TierFreeVersion() {
			if !inclFreeVersions {
				fivs.FreeVersions = append(fivs.FreeVersions, fi)
			}
		} else {
			if !inclFreeVersions {
				fivs.Versions[n] = fi
			}
			n++

		// https://docs.aws.amazon.com/AmazonS3/latest/API/API_HeadObject.html#API_HeadObject_ResponseSyntax
		w.Header()[xhttp.AmzStorageClass] = []string{filterStorageClass(ctx, objInfo.TransitionedObject.Tier)}
	}

	if lc, err := globalLifecycleSys.Get(objInfo.Bucket); err == nil {
		lc.SetPredictionHeaders(w, objInfo.ToLifecycleOpts())
	}

	if v, ok := objInfo.UserDefined[ReservedMetadataPrefix+"compression"]; ok {

		vID, err := uuid.Parse(fi.TierFreeVersionID())
		if err != nil {
			panic(fmt.Errorf("Invalid Tier Object delete marker versionId %s %v", fi.TierFreeVersionID(), err))
		}
		freeEntry := xlMetaV2Version{Type: DeleteType, WrittenByVersion: globalVersionUnix}
		freeEntry.DeleteMarker = &xlMetaV2DeleteMarker{
			VersionID: vID,

	if dui.TierStats == nil {
		return nil
	}
	// e.g minio_cluster_ilm_transitioned_bytes{tier="S3TIER-1"}=136314880
	//     minio_cluster_ilm_transitioned_objects{tier="S3TIER-1"}=1
	//     minio_cluster_ilm_transitioned_versions{tier="S3TIER-1"}=3
	for tier, st := range dui.TierStats.Tiers {
		metrics = append(metrics, MetricV2{
			Description:    getClusterTransitionedBytesMD(),

policy_count=$(./mc admin policy list myminio/ | wc -l)

## create a warm tier instance
(minio server /tmp/xltier/{1...4}/disk{0...1} --address :9002 2>&1 >/dev/null) &

export MC_HOST_mytier="http://minioadmin:minioadmin@localhost:9002/"

./mc ready myminio

./mc mb -l myminio/bucket2
./mc mb -l mytier/tiered

## create a tier and set up ilm policy to tier immediately

		Transport:       globalRemoteTargetTransport,
		TrailingHeaders: true,
	}
	client, err := minio.New(u.Host, opts)
	if err != nil {
		return nil, err
	}
	client.SetAppInfo(fmt.Sprintf("minio-tier-%s", tier), ReleaseTag)

	core := &minio.Core{Client: client}
	return &warmBackendMinIO{
		warmBackendS3{
			client: client,
			core:   core,
			Bucket: conf.Bucket,

	client, err := storage.NewClient(context.Background(),
		option.WithCredentialsJSON(credsJSON),
		option.WithScopes(storage.ScopeReadWrite),
		option.WithHTTPClient(clnt),
		option.WithUserAgent(fmt.Sprintf("gcs-tier-%s", tier)+SlashSeparator+ReleaseTag),
	)
	if err != nil {
		return nil, err
	}
	return &warmBackendGCS{client, conf.Bucket, conf.Prefix, conf.StorageClass}, nil
}

}

func stsLogIf(ctx context.Context, err error, errKind ...interface{}) {
	logger.LogIf(ctx, "sts", err, errKind...)
}

func tierLogIf(ctx context.Context, err error, errKind ...interface{}) {
	logger.LogIf(ctx, "tier", err, errKind...)
}

func kmsLogIf(ctx context.Context, err error, errKind ...interface{}) {
	logger.LogIf(ctx, "kms", err, errKind...)
}

// KMSLogger permits access to kms module specific logging