expiryNumWorkers             MetricName = "expiry_num_workers"
	transitionMissedTasks        MetricName = "transition_missed_immediate_tasks"

	transitionedBytes    MetricName = "transitioned_bytes"
	transitionedObjects  MetricName = "transitioned_objects"
	transitionedVersions MetricName = "transitioned_versions"

	tierRequestsSuccess MetricName = "requests_success"
	tierRequestsFailure MetricName = "requests_failure"

		if !srcInfo.metadataOnly {
			goiOpts := os.GetOpts()
			if !globalTierConfigMgr.Empty() {
				if goi, gerr := getObjectInfo(ctx, dstBucket, dstObject, goiOpts); gerr == nil {
					os.SetTransitionState(goi.TransitionedObject)
				}
			}
		}

		copyObjectFn := objectAPI.CopyObject

		// Copy source object to destination, if source and destination
		// object is same then only metadata is updated.