pool := globalBytePoolCap.Load()
		bufA := pool.Get()
		bufB := pool.Get()
		defer pool.Put(bufA)
		defer pool.Put(bufB)
		ra, err := readahead.NewReaderBuffer(data, [][]byte{bufA[:fi.Erasure.BlockSize], bufB[:fi.Erasure.BlockSize]})
		if err == nil {
			toEncode = ra
			defer ra.Close()
		}
	}

	n, err := erasure.Encode(ctx, toEncode, writers, buffer, writeQuorum)

	ctx := newContext(r, w, "ClusterCheckHandler")

	objLayer := checkHealth(w)
	if objLayer == nil {
		return
	}

	ctx, cancel := context.WithTimeout(ctx, globalAPIConfig.getClusterDeadline())
	defer cancel()

	opts := HealthOptions{
		Maintenance:    r.Form.Get("maintenance") == "true",
		DeploymentType: r.Form.Get("deployment-type"),
	}
	result := objLayer.Health(ctx, opts)

func (z *erasureServerPools) NSScanner(ctx context.Context, updates chan<- DataUsageInfo, wantCycle uint32, healScanMode madmin.HealScanMode) error {
	// Updates must be closed before we return.
	defer xioutil.SafeClose(updates)

	ctx, cancel := context.WithCancel(ctx)
	defer cancel()

	var wg sync.WaitGroup
	var mu sync.Mutex
	var results []dataUsageCache
	var firstErr error

	allBuckets, err := z.ListBuckets(ctx, BucketOptions{})

	if r == nil {
		return
	}

	r.Lock()
	defer r.Unlock()
	delete(r.Cache, bucket)
}

// UpdateReplicaStat updates in-memory replica statistics with new values.
func (r *ReplicationStats) UpdateReplicaStat(bucket string, n int64) {
	if r == nil {
		return
	}

	r.Lock()
	defer r.Unlock()
	bs, ok := r.Cache[bucket]
	if !ok {
		bs = newBucketReplicationStats()

func testServicesCmdHandler(cmd cmdType, t *testing.T) {
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	adminTestBed, err := prepareAdminErasureTestBed(ctx)
	if err != nil {
		t.Fatal("Failed to initialize a single node Erasure backend for admin handler tests.", err)
	}
	defer adminTestBed.TearDown()

	// Initialize admin peers to make admin RPC calls. Note: In a

func TestShuffleDisks(t *testing.T) {
	ctx, cancel := context.WithCancel(t.Context())
	defer cancel()

	nDisks := 16
	disks, err := getRandomDisks(nDisks)
	if err != nil {
		t.Fatal(err)
	}
	objLayer, _, err := initObjectLayer(ctx, mustGetPoolEndpoints(0, disks...))
	if err != nil {
		removeRoots(disks)
		t.Fatal(err)
	}
	defer removeRoots(disks)
	z := objLayer.(*erasureServerPools)
	testShuffleDisks(t, z)
}

	// create a temp Erasure/FS backend.
	ctx, cancel := context.WithCancel(b.Context())
	defer cancel()
	objLayer, disks, err := prepareTestBackend(ctx, instanceType)
	if err != nil {
		b.Fatalf("Failed obtaining Temp Backend: <ERROR> %s", err)
	}
	// cleaning up the backend by removing all the directories and files created on function return.
	defer removeRoots(disks)

	// uses *testing.B and the object Layer to run the benchmark.

}()

const (
	EnvTestEtcdBackend = "_MINIO_ETCD_TEST_SERVER"
)

func (s *TestSuiteIAM) setUpEtcd(c *check, etcdServer string) {
	ctx, cancel := context.WithTimeout(context.Background(), testDefaultTimeout)
	defer cancel()

	configCmds := []string{
		"etcd",
		"endpoints=" + etcdServer,
		"path_prefix=" + mustGetUUID(),
	}
	_, err := s.adm.SetConfigKV(ctx, strings.Join(configCmds, " "))
	if err != nil {

	switch flag & writeMode {
	case writeMode:
		defer updateOSMetrics(osMetricOpenFileW, name)(err)
	default:
		defer updateOSMetrics(osMetricOpenFileR, name)(err)
	}
	return os.OpenFile(name, flag, perm)
}

// Access captures time taken to call syscall.Access()
// on windows, plan9 and solaris syscall.Access uses
// os.Lstat()
func Access(name string) (err error) {
	defer updateOSMetrics(osMetricAccess, name)(err)

func (api objectAPIHandlers) PutBucketReplicationConfigHandler(w http.ResponseWriter, r *http.Request) {
	ctx := newContext(r, w, "PutBucketReplicationConfig")
	defer logger.AuditLog(ctx, w, r, mustGetClaimsFromToken(r))

	vars := mux.Vars(r)
	bucket := vars["bucket"]
	objectAPI := api.ObjectAPI()
	if objectAPI == nil {