(*) Parquet is disabled on the MinIO server by default. See below how to enable it.

## Enabling Parquet Format

Parquet is DISABLED by default since hostile crafted input can easily crash the server.

If you are in a controlled environment where it is safe to assume no hostile content can be uploaded to your cluster you can safely enable Parquet.

func (p *scannerMetrics) getCurrentPaths() []string {
	var res []string
	prefix := globalLocalNodeName + "/"
	p.currentPaths.Range(func(key, value interface{}) bool {
		// We are a bit paranoid, but better miss an entry than crash.
		name, ok := key.(string)
		if !ok {
			return true
		}
		obj, ok := value.(*currentPathTracker)
		if !ok {
			return true
		}
		strptr := (*string)(atomic.LoadPointer(obj.name))

			}
			wait()
			return nil
		})
	})

	readDirFn(pathJoin(drivePath, minioMetaTmpBucket), func(tmpDir string, typ os.FileMode) error {
		if strings.HasPrefix(tmpDir, ".trash") {
			// do not remove .trash/ here, it has its own routines
			return nil
		}
		vi, err := disk.StatVol(ctx, pathJoin(minioMetaTmpBucket, tmpDir))
		if err != nil {
			return nil
		}

			m.mu.Lock()
			for k, v := range m.trash {
				if time.Since(v.lastUpdate) > metacacheMaxRunningAge {
					v.delete(context.Background())
					delete(m.trash, k)
				}
			}
			m.mu.Unlock()
		}
	}()
}

// updateCacheEntry will update non-transient state.
func (m *metacacheManager) updateCacheEntry(update metacache) (metacache, error) {
	m.mu.RLock()
	if meta, ok := m.trash[update.id]; ok {
		m.mu.RUnlock()

	// MinIO tmp meta prefix.
	minioMetaTmpBucket = minioMetaBucket + "/tmp"
	// MinIO tmp meta prefix for deleted objects.
	minioMetaTmpDeletedBucket = minioMetaTmpBucket + "/.trash"

	// DNS separator (period), used for bucket name validation.
	dnsDelimiter = "."
	// On compressed files bigger than this;
	compReadAheadSize = 100 << 20
	// Read this many buffers ahead.
	compReadAheadBuffers = 5

				return
			}

			// We might land at .metacache, .trash, .multipart
			// no need to heal them skip, only when bucket
			// is '.minio.sys'
			if bucket == minioMetaBucket {
				if wildcard.Match("buckets/*/.metacache/*", entry.name) {
					return
				}
				if wildcard.Match("tmp/.trash/*", entry.name) {
					return
				}
				if wildcard.Match("multipart/*", entry.name) {

		tmpMetaDir := path.Join(disk, minioMetaTmpBucket)
		files, err := os.ReadDir(tmpMetaDir)
		if err != nil {
			t.Fatal(err)
		}
		var found bool
		for _, fi := range files {
			if fi.Name() == ".trash" {
				continue
			}
			found = true
		}
		if found {
			t.Fatalf("%s: expected: empty, got: non-empty %#v", minioMetaTmpBucket, files)
		}
	}
}

	newDisks, _, healing := er.getOnlineDisksWithHealingAndInfo(inclHealing)
	return newDisks, healing > 0
}

// Clean-up previously deleted objects. from .minio.sys/tmp/.trash/
func (er erasureObjects) cleanupDeletedObjects(ctx context.Context) {
	var wg sync.WaitGroup
	for _, disk := range er.getLocalDisks() {
		if disk == nil {
			continue
		}
		wg.Add(1)

	// Start the disk monitoring and connect routine.
	if !globalIsTesting {
		go s.monitorAndConnectEndpoints(ctx, defaultMonitorConnectEndpointInterval)
	}

	return s, nil
}

// cleanup ".trash/" folder every 5m minutes with sufficient sleep cycles, between each
// deletes a dynamic sleeper is used with a factor of 10 ratio with max delay between
// deletes to be 2 seconds.

func (m *mrfState) healRoutine(z *erasureServerPools) {
	for {
		select {
		case <-GlobalContext.Done():
			return
		case u, ok := <-m.opCh:
			if !ok {
				return
			}

			// We might land at .metacache, .trash, .multipart
			// no need to heal them skip, only when bucket
			// is '.minio.sys'
			if u.bucket == minioMetaBucket {
				// No MRF needed for temporary objects
				if wildcard.Match("buckets/*/.metacache/*", u.object) {