nDisks := 1
	fsDirs, err := getRandomDisks(nDisks)
	if err != nil {
		return nil, "", err
	}
	obj, _, err := initObjectLayer(context.Background(), mustGetPoolEndpoints(0, fsDirs...))
	if err != nil {
		return nil, "", err
	}

	initAllSubsystems(ctx)

	globalIAMSys.Init(ctx, obj, globalEtcdClient, 2*time.Second)
	return obj, fsDirs[0], nil
}

		return nil, nil, err
	}
	return objLayer, fsDirs, nil
}

func TestPoolMetaValidate(t *testing.T) {
	objLayer1, fsDirs, err := prepareErasurePools()
	if err != nil {
		t.Fatal(err)
	}
	defer removeRoots(fsDirs)

	meta := objLayer1.(*erasureServerPools).poolMeta
	pools := objLayer1.(*erasureServerPools).serverPools

	objLayer2, fsDirs, err := prepareErasurePools()
	if err != nil {

// syscall.ENOENT (parent does not exist).
func reliableMkdirAll(dirPath string, mode os.FileMode, baseDir string) (err error) {
	i := 0
	for {
		// Creates all the parent directories, with mode 0777 mkdir honors system umask.
		if err = osMkdirAll(dirPath, mode, baseDir); err != nil {
			// Retry only for the first retryable error.
			if osIsNotExist(err) && i == 0 {
				i++

	benchmarkInitStorageDisksN(b, 32*204)
}

func benchmarkInitStorageDisksN(b *testing.B, nDisks int) {
	b.ResetTimer()
	b.ReportAllocs()

	fsDirs, err := getRandomDisks(nDisks)
	if err != nil {
		b.Fatal(err)
	}

	endpoints := mustGetNewEndpoints(0, 16, fsDirs...)
	b.RunParallel(func(pb *testing.PB) {
		endpoints := endpoints
		for pb.Next() {

		// building. They are used to mark duplicate entries.
		files := make(map[string]int)
		knownDirs := make(map[string]int)

		// dirs[name] is true if name is known to be a directory,
		// because it appears as a prefix in a path.
		dirs := make(map[string]bool)

		for _, file := range r.File {
			isDir := len(file.Name) > 0 && file.Name[len(file.Name)-1] == '/'
			name := toValidName(file.Name)

		if m.reuse {
			for i, entry := range m.o[n:] {
				metaDataPoolPut(entry.metadata)
				m.o[n+i].metadata = nil
			}
		}
		m.o = m.o[:n]
	}
}

// len returns the number of objects and prefix dirs in m.
func (m *metaCacheEntriesSorted) len() int {
	if m == nil {
		return 0
	}
	return len(m.o)
}

// entries returns the underlying objects as is currently represented.

	}

	// Nothing to delete
	if len(foundDirs) == 0 {
		return nil
	}

	// Delete excessive inline entries.
	// Convert to slice.
	dirs = dirs[:0]
	for dir := range foundDirs {
		dirs = append(dirs, dir)
	}
	if xl.data.remove(dirs...) {
		newBuf, err := xl.AppendTo(metaDataPoolGet())
		if err == nil {
			defer metaDataPoolPut(newBuf)

	}

	if j > 1 {
		// Create parent.
		if err := osMkdirAll(dirPath[:j-1], perm, baseDir); err != nil {
			return err
		}
	}

	// Parent now exists; invoke Mkdir and use its result.
	if err := Mkdir(dirPath, perm); err != nil {
		if osIsExist(err) {
			return nil
		}
		return err
	}

	return nil
}

// The buffer must be at least a block long.
// refer https://github.com/golang/go/issues/24015

	if err != io.EOF {
		t.Fatal(err, entries.len())
	}
	want := loadMetacacheSampleNames
	var noDirs []string
	for i, entry := range entries.entries() {
		if entry.name != want[i] {
			t.Errorf("entry %d, want %q, got %q", i, want[i], entry.name)
		}
		if !entry.isDir() {
			noDirs = append(noDirs, entry.name)
		}
	}
	if entries.len() != len(want) {

	const numDisks = 4
	path := t.TempDir()

	var fsDirs []string
	for i := 1; i <= numDisks; i++ {
		fsDirs = append(fsDirs, filepath.Join(path, fmt.Sprintf("disk%d", i)))
	}

	objLayer, _, err := initObjectLayer(ctx, mustGetPoolEndpoints(0, fsDirs...))
	if err != nil {
		removeRoots(fsDirs)
		t.Fatal(err)
	}

	// cleaning up of temporary test directories