// checkOld can be set to an expected value.
// If the worker count changed
func (p *ReplicationPool) ResizeWorkers(n, checkOld int) {
	p.mu.Lock()
	defer p.mu.Unlock()

	if (checkOld > 0 && len(p.workers) != checkOld) || n == len(p.workers) || n < 1 {
		// Either already satisfied or worker count changed while we waited for the lock.
		return
	}
	for len(p.workers) < n {

			secretKey:     change.Create.SecretKey,
			sessionPolicy: sp,
			claims:        change.Create.Claims,
			name:          change.Create.Name,
			description:   change.Create.Description,
			expiration:    change.Create.Expiration,
		}
		_, _, err = globalIAMSys.NewServiceAccount(ctx, change.Create.Parent, change.Create.Groups, opts)
		if err != nil {
			return wrapSRErr(err)
		}

	case change.Update != nil:

	// We have to copy metadata only if source and destination are same.
	// this changes for encryption which can be observed below.
	if cpSrcDstSame {
		srcInfo.metadataOnly = true
	}

	var chStorageClass bool
	if dstSc != "" && dstSc != srcInfo.StorageClass {
		chStorageClass = true
		srcInfo.metadataOnly = false
	} // no changes in storage-class expected so its a metadataonly operation.

	wg.Add(2)
	go publish(ReportMetrics(GlobalContext, c.metricsGroups))
	go publish(globalNotificationSys.GetClusterMetrics(GlobalContext))
	wg.Wait()
}

// ReportMetrics reports serialized metrics to the channel passed for the metrics generated.
func ReportMetrics(ctx context.Context, metricsGroups []*MetricsGroupV2) <-chan MetricV2 {
	ch := make(chan MetricV2)
	go func() {
		defer xioutil.SafeClose(ch)

		if err != nil {
			writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
			return
		}
	}
	addErr := func(msg string) {}

	// Write a version for making *incompatible* changes.
	// The AdminClient will reject any version it does not know.
	var inspectZipW *zip.Writer
	if publicKey != nil {
		w.WriteHeader(200)
		stream := estream.NewWriter(w)
		defer stream.Close()

			expectedRespStatus: http.StatusOK,
			accessKey:          credentials.AccessKey,
			secretKey:          credentials.SecretKey,
			shouldPass:         true,
			contentEncoding:    "aws-chunked,gzip",
			fault:              None,
		},
	}
	// Iterating over the cases, fetching the object validating the response.
	for i, testCase := range testCases {