}

// TransitionObject - transition object content to target tier.
func (er erasureObjects) TransitionObject(ctx context.Context, bucket, object string, opts ObjectOptions) error {
	tgtClient, err := globalTierConfigMgr.getDriver(ctx, opts.Transition.Tier)
	if err != nil {
		return err
	}

	if !opts.NoLock {
		// Acquire write lock before starting to transition the object.
		lk := er.NewNSLock(bucket, object)

	DeleteReplication   ReplicationState    // Represents internal replication state needed for Delete replication
	Transition          TransitionOptions
	Expiration          ExpirationOptions
	LifecycleAuditEvent lcAuditEvent

	WantChecksum *hash.Checksum // x-amz-checksum-XXX checksum sent to PutObject/ CompleteMultipartUpload.

	return evalDisks(disks, errs), err
}

// PutObjectPart - reads incoming stream and internally erasure codes
// them. This call is similar to single put operation but it is part
// of the multipart transaction.
//
// Implements S3 compatible Upload Part API.
func (er erasureObjects) PutObjectPart(ctx context.Context, bucket, object, uploadID string, partID int, r *PutObjReader, opts ObjectOptions) (pi PartInfo, err error) {

		UserAgent:    r.UserAgent(),
		Host:         handlers.GetSourceIP(r),
	})

	if !remoteCallRequired && !globalTierConfigMgr.Empty() {
		// Schedule object for immediate transition if eligible.
		objInfo.ETag = origETag
		enqueueTransitionImmediate(objInfo, lcEventSrc_s3CopyObject)
		// Remove the transitioned object whose object version is being overwritten.
		os.Sweep()
	}
}

			Status:    http.StatusText(http.StatusOK),
		})
	}

	// Remove the transitioned object whose object version is being overwritten.
	if !globalTierConfigMgr.Empty() {
		// Schedule object for immediate transition if eligible.
		enqueueTransitionImmediate(objInfo, lcEventSrc_s3CompleteMultipartUpload)
		os.Sweep()
	}
}

// AbortMultipartUploadHandler - Abort multipart upload