g := errgroup.WithNErrs(len(disks))

	// Start writing `xl.meta` to all disks in parallel.
	for index := range disks {
		index := index
		g.Go(func() error {
			if disks[index] == nil {
				return errDiskNotFound
			}
			// Pick one FileInfo for a disk at index.
			fi := files[index]

single process running those previous steps *even* if afterwards, you start **multiple processes** (multiple workers) for the application itself. If those steps were run by **multiple processes**, they would **duplicate** the work by running it in **parallel**, and if the steps were something delicate like a database migration, they could cause conflicts with each other.

Of course, there are some cases where there's no problem in running the previous steps multiple times, in that case, it's...

- **We do not recommend upgrading one MinIO server at a time, the product is designed to support parallel upgrades please follow our recommended guidelines.**

## Explore Further

- [MinIO Erasure Code Overview](https://min.io/docs/minio/linux/operations/concepts/erasure-coding.html)

          lastGoodStreamId = streamId
          streams[streamId] = newStream

          // Use a different task queue for each stream because they should be handled in parallel.
          taskRunner.newQueue().execute("$connectionName[$streamId] onStream") {
            try {
              listener.onStream(newStream)
            } catch (e: IOException) {

	bootstrapTraceMsgFirstTime("loading policy documents")

	policyLoadStartTime := UTCNow()
	policiesList := listedConfigItems[policiesListKey]
	count := 32 // number of parallel IAM loaders
	for {
		if len(policiesList) < count {
			policyDocs, err := iamOS.loadPolicyDocConcurrent(ctx, policiesList...)
			if err != nil {
				return err
			}
			for index := range policiesList {

4 }} {{- end }} {{- if .Values.additionalAnnotation }} annotations: {{ toYaml .Values.additionalAnnotation | trimSuffix "\n" | indent 4 }} {{- end }} spec: updateStrategy: type: {{ .Values.StatefulSetUpdate.updateStrategy }} podManagementPolicy: "Parallel" serviceName: {{ template "minio.fullname" . }}-svc replicas: {{ mul $poolCount $nodeCount }} selector: matchLabels: app: {{ template "minio.name" . }} release: {{ .Release.Name }} template: metadata: name: {{ template "minio.fullname" . }} labels:...

4 }} {{- end }} {{- if .Values.additionalAnnotation }} annotations: {{ toYaml .Values.additionalAnnotation | trimSuffix "\n" | indent 4 }} {{- end }} spec: updateStrategy: type: {{ .Values.StatefulSetUpdate.updateStrategy }} podManagementPolicy: "Parallel" serviceName: {{ template "minio.fullname" . }}-svc replicas: {{ mul $poolCount $nodeCount }} selector: matchLabels: app: {{ template "minio.name" . }} release: {{ .Release.Name }} template: metadata: name: {{ template "minio.fullname" . }} labels:...

	for _, lstorageInfo := range storageInfos {
		storageInfo.Disks = append(storageInfo.Disks, lstorageInfo.Disks...)
	}

	return storageInfo
}

// Shutdown shutsdown all erasure coded sets in parallel
// returns error upon first error.
func (s *erasureSets) Shutdown(ctx context.Context) error {
	g := errgroup.WithNErrs(len(s.sets))

	for index := range s.sets {
		index := index
		g.Go(func() error {

typedef struct TFE_Executor TFE_Executor;

// Creates a new eager Executor. Nodes in one executor are guaranteed to be
// executed in sequence. Assigning nodes to different executors allows executing
// nodes in parallel.
// in_flight_nodes_limit: when is_async is true, this value controls the
// maximum number of in flight async nodes. Enqueuing of additional async ops
// after the limit is reached blocks until some inflight nodes finishes.

4 }} {{- end }} {{- if .Values.additionalAnnotation }} annotations: {{ toYaml .Values.additionalAnnotation | trimSuffix "\n" | indent 4 }} {{- end }} spec: updateStrategy: type: {{ .Values.StatefulSetUpdate.updateStrategy }} podManagementPolicy: "Parallel" serviceName: {{ template "minio.fullname" . }}-svc replicas: {{ mul $poolCount $nodeCount }} selector: matchLabels: app: {{ template "minio.name" . }} release: {{ .Release.Name }} template: metadata: name: {{ template "minio.fullname" . }} labels:...