type Session struct {
	DryRun                   bool
	PrepareStmt              bool
	NewDB                    bool
	Initialized              bool
	SkipHooks                bool
	SkipDefaultTransaction   bool
	DisableNestedTransaction bool
	AllowGlobalUpdate        bool
	FullSaveAssociations     bool
	PropagateUnscoped        bool
	QueryFields              bool
	Context                  context.Context

	Writer          bool   // Bool whether write or read lock.
	UID             string // UID to uniquely identify request of client.
	Timestamp       int64  // Timestamp set at the time of initialization.
	TimeLastRefresh int64  // Timestamp for last lock refresh.
	Source          string // Contains line, function and filename requesting the lock.
	Group           bool   // indicates if it was a group lock.

	testData := []byte("foo")
	testCases := []struct {
		volumeName      string
		objectName      string
		data            []byte
		expectErr       bool
		ignoreIfWindows bool
	}{
		{"foo", "myobject", testData, false, false},
		{"foo", "myobject-0byte", []byte{}, false, false},
		// volume not found error.
		{"foo-bar", "myobject", testData, true, false},

	Reader       *hash.Reader   `json:"-" msg:"-"`
	PutObjReader *PutObjReader  `json:"-" msg:"-"`

	metadataOnly bool
	versionOnly  bool // adds a new version, only used by CopyObject
	keyRotation  bool

	// Date and time when the object was last accessed.
	AccTime time.Time

	Legacy bool // indicates object on disk is in legacy data format

	// internal representation of version purge status

	cmdline string
	layout  [][]string
}

type disksLayout struct {
	legacy bool
	pools  []poolDisksLayout
}

type serverCtxt struct {
	JSON, Quiet               bool
	Anonymous                 bool
	StrictS3Compat            bool
	Addr, ConsoleAddr         string
	ConfigDir, CertsDir       string
	configDirSet, certsDirSet bool
	Interface                 string

	RootUser, RootPwd string

	ResyncTimestamp       string
	ReplicationResynced   bool // true only if resync attempted for this target
	endpoint              string
	secure                bool
	Err                   error // replication error if any
}

// Empty returns true for a target if arn is empty
func (rt replicatedTargetInfo) Empty() bool {
	return rt.Arn == ""
}

type replicatedInfos struct {

	})
	weSleep := func() bool { return false }

	got, err := scanDataFolder(t.Context(), nil, &xls, dataUsageCache{Info: dataUsageCacheInfo{Name: bucket}}, getSize, 0, weSleep)
	if err != nil {
		t.Fatal(err)
	}

	// Test dirs
	want := []struct {
		path       string
		isNil      bool
		size, objs int
		flatten    bool
		oSizes     sizeHistogram
	}{
		{
			path:    "/",

	PrimaryKey             bool
	AutoIncrement          bool
	AutoIncrementIncrement int64
	Creatable              bool
	Updatable              bool
	Readable               bool
	AutoCreateTime         TimeType
	AutoUpdateTime         TimeType
	HasDefaultValue        bool
	DefaultValue           string
	DefaultValueInterface  interface{}
	NotNull                bool
	Unique                 bool

type Node struct {
	*url.URL
	Pools    []int
	IsLocal  bool
	GridHost string
}

// Endpoint - any type of endpoint.
type Endpoint struct {
	*url.URL
	IsLocal bool

	PoolIdx, SetIdx, DiskIdx int
}

// Equal returns true if endpoint == ep
func (endpoint Endpoint) Equal(ep Endpoint) bool {

	var nodeIndex int
	if subToken, nodeIndex = parseRequestToken(token); nodeIndex >= 0 {
		proxied, success = proxyRequestByNodeIndex(ctx, w, r, nodeIndex, returnErr)
	}
	return
}

func proxyRequestByNodeIndex(ctx context.Context, w http.ResponseWriter, r *http.Request, index int, returnErr bool) (proxied, success bool) {