type WarmBackend interface {
	Put(ctx context.Context, object string, r io.Reader, length int64) (remoteVersionID, error)
	Get(ctx context.Context, object string, rv remoteVersionID, opts WarmBackendGetOpts) (io.ReadCloser, error)
	Remove(ctx context.Context, object string, rv remoteVersionID) error
	InUse(ctx context.Context) (bool, error)
}

const probeObject = "probeobject"

		return minPartSize, nil
	}
	return partSize, nil
}

func (m *warmBackendMinIO) Put(ctx context.Context, object string, r io.Reader, length int64) (remoteVersionID, error) {
	partSize, err := optimalPartSize(length)
	if err != nil {
		return remoteVersionID(""), err
	}
	res, err := m.client.PutObject(ctx, m.Bucket, m.getDest(object), r, length, minio.PutObjectOptions{
		StorageClass:         m.StorageClass,

	if err != nil {
		return "", azureToObjectError(err, az.Bucket, object)
	}
	return remoteVersionID(res.Version()), nil
}

func (az *warmBackendAzure) Get(ctx context.Context, object string, rv remoteVersionID, opts WarmBackendGetOpts) (r io.ReadCloser, err error) {
	if opts.startOffset < 0 {
		return nil, InvalidRange{}
	}

}

// FIXME: add support for remote version ID in GCS remote tier and remove this.
// Currently it's a no-op.

func (gcs *warmBackendGCS) Put(ctx context.Context, key string, data io.Reader, length int64) (remoteVersionID, error) {
	object := gcs.client.Bucket(gcs.Bucket).Object(gcs.getDest(key))
	// TODO: set storage class
	w := object.NewWriter(ctx)
	if gcs.StorageClass != "" {
		w.ObjectAttrs.StorageClass = gcs.StorageClass
	}

		tier            string
		remoteObjName   string
		remoteVersionID string
		status          string
	}{
		{
			tier:            "S3TIER-1",
			remoteObjName:   mustGetUUID(),
			remoteVersionID: mustGetUUID(),
			status:          "complete",
		},
		{
			tier:            "S3TIER-2",
			remoteObjName:   mustGetUUID(),
			remoteVersionID: mustGetUUID(),
			status:          "complete",
		},
	}

	res, err := s3.client.PutObject(ctx, s3.Bucket, s3.getDest(object), r, length, minio.PutObjectOptions{
		SendContentMd5: true,
		StorageClass:   s3.StorageClass,
	})
	return remoteVersionID(res.VersionID), s3.ToObjectError(err, object)
}

func (s3 *warmBackendS3) Get(ctx context.Context, object string, rv remoteVersionID, opts WarmBackendGetOpts) (io.ReadCloser, error) {

package cmd

import (
	"bytes"
	"testing"

	"github.com/tinylib/msgp/msgp"
)

// TestJEntryReadOldToNew1 - tests that adding the RemoteVersionID parameter to the
// jentry struct does not cause unexpected errors when reading the serialized
// old version into new version.
func TestJEntryReadOldToNew1(t *testing.T) {
	readOldToNewCases := []struct {
		je  jentryV1

func deleteObjectFromRemoteTier(ctx context.Context, objName, rvID, tierName string) error {
	w, err := globalTierConfigMgr.getDriver(tierName)
	if err != nil {
		return err
	}
	err = w.Remove(ctx, objName, remoteVersionID(rvID))
	if err != nil {
		return err
	}
	return nil
}

func (jd *tierDiskJournal) deletePending(ctx context.Context) {
	ticker := time.NewTicker(30 * time.Minute)
	defer ticker.Stop()
	for {

func deleteObjectFromRemoteTier(ctx context.Context, objName, rvID, tierName string) error {
	w, err := globalTierConfigMgr.getDriver(ctx, tierName)
	if err != nil {
		return err
	}
	return w.Remove(ctx, objName, remoteVersionID(rvID))

		gopts.startOffset = off
		gopts.length = length
	}

	timeTierAction := auditTierActions(ctx, oi.TransitionedObject.Tier, length)
	reader, err := tgtClient.Get(ctx, oi.TransitionedObject.Name, remoteVersionID(oi.TransitionedObject.VersionID), gopts)
	if err != nil {
		return nil, err
	}
	closer := func() {
		timeTierAction(reader.Close())
	}
	return fn(reader, h, closer)
}