// Config storage class configuration
type Config struct {
	Standard    StorageClass `json:"standard"`
	RRS         StorageClass `json:"rrs"`
	Optimize    string       `json:"optimize"`
	inlineBlock int64

	initialized bool
}

// UnmarshalJSON - Validate SS and RRS parity when unmarshalling JSON.
func (sCfg *Config) UnmarshalJSON(data []byte) error {
	type Alias Config
	aux := &struct {

	configStandardParityMD = NewGaugeMD(configStandardParity,
		"Standard storage class parity")
)

// loadClusterConfigMetrics - `MetricsLoaderFn` for cluster config
// such as standard and RRS parity.
func loadClusterConfigMetrics(ctx context.Context, m MetricValues, c *metricsCache) error {
	clusterDriveMetrics, err := c.clusterDriveMetrics.Get()
	if err != nil {
		metricsLogIf(ctx, err)
	} else {

		ignoreInUse, _ = strconv.ParseBool(forceStr)
	}

	// Disallow remote tiers with internal storage class names
	switch cfg.Name {
	case storageclass.STANDARD, storageclass.RRS:
		writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, errTierReservedName), r.URL)
		return
	}

	// Refresh from the disk in case we had missed notifications about edits from peers.

MINIO_STORAGE_CLASS_RRS: Format "EC:<Default_Parity_Reduced_Redundancy_Class>" (e.g. "EC:3"). This sets the number of parity drives for MinIO server in Reduced Redundancy mode. Objects are stored in Reduced Redundancy mode, if Put request specifies RRS storage class
Refer to the link https://github.com/minio/minio/tree/master/docs/erasure/storage-class for more information`,
	)

	ErrUnexpectedBackendVersion = newErrFn(
		"Backend version seems to be too recent",

	SyncEvents                  bool          `json:"sync_events"`
	ObjectMaxVersions           int64         `json:"object_max_versions"`
}

// UnmarshalJSON - Validate SS and RRS parity when unmarshalling JSON.
func (sCfg *Config) UnmarshalJSON(data []byte) error {
	type Alias Config
	aux := &struct {
		*Alias
	}{
		Alias: (*Alias)(sCfg),
	}
	return json.Unmarshal(data, &aux)
}

	})

	backendInfo := o.BackendInfo()
	status.SCParity = make(map[string]int)
	status.SCParity[storageclass.STANDARD] = backendInfo.StandardSCParity
	status.SCParity[storageclass.RRS] = backendInfo.RRSCParity

	return status, true
}

type healEntryResult struct {
	bytes     uint64
	success   bool
	skipped   bool
	entryDone bool
	name      string
}

```
KEY:
storage_class  define object level redundancy

ARGS:
standard  (string)    set the parity count for default standard storage class e.g. "EC:4"
rrs       (string)    set the parity count for reduced redundancy storage class e.g. "EC:2"
comment   (sentence)  optionally add a comment to this setting
```

or environment variables

```
KEY:

	bucketNames := []string{"minio-bucket", "minio-2-bucket"}
	objectNames := []string{"minio-object-1.txt"}
	uploadIDs := []string{}

	globalStorageClass.Update(storageclass.Config{
		RRS: storageclass.StorageClass{
			Parity: 2,
		},
		Standard: storageclass.StorageClass{
			Parity: 4,
		},
	})

	// bucketnames[0].
	// objectNames[0].
	// uploadIds [0].

func filterStorageClass(ctx context.Context, s string) string {
	// Veeam 14.0 and later clients are not compatible with custom storage classes.
	if globalVeeamForceSC != "" && s != storageclass.STANDARD && s != storageclass.RRS && isVeeamClient(ctx) {
		return globalVeeamForceSC
	}
	return s

	meta[xhttp.AmzTagDirective] = "REPLACE"

	if sc == "" {
		sc = oi.StorageClass
	}
	// drop non standard storage classes for tiering from replication
	if sc != "" && (sc == storageclass.RRS || sc == storageclass.STANDARD) {
		meta[xhttp.AmzStorageClass] = sc
	}

	meta[xhttp.MinIOSourceETag] = oi.ETag
	meta[xhttp.MinIOSourceMTime] = oi.ModTime.UTC().Format(time.RFC3339Nano)