},
			{
				Description: MetricDescription{
					Namespace: nodeMetricNamespace,
					Subsystem: scannerSubsystem,
					Name:      "versions_scanned",
					Help:      "Total number of object versions scanned since server start",
					Type:      counterMetric,
				},
				Value: float64(globalScannerMetrics.lifetime(scannerMetricApplyVersion)),
			},
			{

	)
	minioVersionInfo = prometheus.NewGaugeVec(
		prometheus.GaugeOpts{
			Namespace: "minio",
			Name:      "version_info",
			Help:      "Version of current MinIO server instance",
		},
		[]string{
			// current version
			"version",
			// commit-id of the current version
			"commit",
		},
	)
)

const (
	healMetricsNamespace = "self_heal"
	cacheNamespace       = "cache"

	report()
	fatalErr(err)

	// At this point the version stack must look as below,
	// v3 --> free version      00000000-0000-0000-0000-0000000000f2 (from removal of null version)
	// v2 --> free version      00000000-0000-0000-0000-0000000000f1 (from overwriting of null version )
	// v1 --> non-free version  00000000-0000-0000-0000-000000000001

	// Check number of free-versions

	// Represents Erasure backend - single drive
	formatBackendErasureSingle = "xl-single"

	// formatErasureV1.Erasure.Version - version '1'.
	formatErasureVersionV1 = "1"

	// formatErasureV2.Erasure.Version - version '2'.
	formatErasureVersionV2 = "2"

	// formatErasureV3.Erasure.Version - version '3'.
	formatErasureVersionV3 = "3"

	// Distribution algorithm used, legacy
	formatErasureVersionV2DistributionAlgoV1 = "CRCMOD"

	"response-content-language",
	"response-content-type",
	"response-expires",
	"retention",
	"select",
	"select-type",
	"tagging",
	"torrent",
	"uploadId",
	"uploads",
	"versionId",
	"versioning",
	"versions",
	"website",
}

// Signature and API related constants.
const (
	signV2Algorithm = "AWS"
)

// AWS S3 Signature V2 calculation rule is give here:

			// Note: entry.fileInfoVersions returns versions sorted in reverse chronological order based on ModTime
			if opts.VersionsSort == WalkVersionsSortAsc {
				versionsSorter(fivs.Versions).reverse()
			}

			for _, version := range fivs.Versions {
				if opts.Filter != nil {
					if opts.Filter(version) {
						if !send(version.ToObjectInfo(bucket, version.Name, vcfg != nil && vcfg.Versioned(version.Name))) {
							return
						}

		return fivs, err
	}
	n := 0
	for _, fi := range fivs.Versions {
		// Filter our tier object delete marker
		if !fi.TierFreeVersion() {
			fivs.Versions[n] = fi
			n++
		} else {
			fivs.FreeVersions = append(fivs.FreeVersions, fi)
		}
	}
	fivs.Versions = fivs.Versions[:n]
	// Update numversions
	for i := range fivs.Versions {
		fivs.Versions[i].NumVersions = n
	}
	return fivs, nil
}

      purge:
          # retainVersions: 0 # (default) delete all versions of the object. This option is the fastest.
          # retainVersions: 5 # keep the latest 5 versions of the object.
  
    - type: deleted # objects with delete marker as their latest version
      name: NAME # match object names that satisfy the wildcard expression.

			// add this version back to remaining versions for
			// subsequent lifecycle policy applications
			objectInfos = append(objectInfos, obj)
			continue
		}

		// NoncurrentDays not passed yet.
		if time.Now().UTC().Before(lifecycle.ExpectedExpiryTime(obj.SuccessorModTime, event.NoncurrentDays)) {
			// add this version back to remaining versions for
			// subsequent lifecycle policy applications

		if len(xl.versions) != 855 {
			t.Errorf("want %d versions, got %d", 855, len(xl.versions))
		}
		xl.sortByModTime()
		if !sort.SliceIsSorted(xl.versions, func(i, j int) bool {
			return xl.versions[i].header.ModTime > xl.versions[j].header.ModTime
		}) {
			t.Errorf("Contents not sorted")
		}
		for i := range xl.versions {
			hdr := xl.versions[i].header
			ver, err := xl.getIdx(i)