diff --git a/weed/mq/schema/schema_test.go b/weed/mq/schema/schema_test.go
new file mode 100644
index 000000000..8621c6500
--- /dev/null
+++ b/weed/mq/schema/schema_test.go
@@ -0,0 +1,98 @@
+package schema
+
+import (
+	"encoding/json"
+	"github.com/golang/protobuf/proto"
+	. "github.com/seaweedfs/seaweedfs/weed/pb/schema_pb"
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+func TestEnumScalarType(t *testing.T) {
+	tests := []struct {
+		name     string
+		enum     ScalarType
+		expected int32
+	}{
+		{"Boolean", ScalarType_BOOLEAN, 0},
+		{"Integer", ScalarType_INTEGER, 1},
+		{"Long", ScalarType_LONG, 3},
+		{"Float", ScalarType_FLOAT, 4},
+		{"Double", ScalarType_DOUBLE, 5},
+		{"Bytes", ScalarType_BYTES, 6},
+		{"String", ScalarType_STRING, 7},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			assert.Equal(t, tt.expected, int32(tt.enum))
+		})
+	}
+}
+
+func TestMapType(t *testing.T) {
+	mt := &MapType{
+		Key:   "key",
+		Value: &Type{Kind: &Type_ScalarType{ScalarType: ScalarType_BOOLEAN}},
+	}
+	assert.NotNil(t, mt)
+}
+
+func TestField(t *testing.T) {
+	field := &Field{
+		Name:        "field_name",
+		Type:        &Type{Kind: &Type_ScalarType{ScalarType: ScalarType_INTEGER}},
+		Index:       1,
+		IsOptional:  true,
+		IsRepeated:  false,
+	}
+	assert.NotNil(t, field)
+}
+
+func TestRecordType(t *testing.T) {
+	subRecord := &RecordType{
+		Fields: []*Field{
+			{
+				Name:        "field_1",
+				Type:        &Type{Kind: &Type_ScalarType{ScalarType: ScalarType_INTEGER}},
+				Index:       1,
+				IsOptional:  true,
+				IsRepeated:  false,
+			},
+			{
+				Name:        "field_2",
+				Type:        &Type{Kind: &Type_ScalarType{ScalarType: ScalarType_STRING}},
+				Index:       2,
+				IsOptional:  true,
+				IsRepeated:  false,
+			},
+		},
+	}
+	record := &RecordType{
+		Fields: []*Field{
+			{
+				Name:        "field_key",
+				Type:        &Type{Kind: &Type_ScalarType{ScalarType: ScalarType_INTEGER}},
+				Index:       1,
+				IsOptional:  true,
+				IsRepeated:  false,
+			},
+			{
+				Name:        "field_record",
+				Type:        &Type{Kind: &Type_RecordType{RecordType: subRecord}},
+				Index:       2,
+				IsOptional:  true,
+				IsRepeated:  false,
+			},
+		},
+	}
+
+	// serialize record to protobuf text marshalling
+	text := proto.MarshalTextString(record)
+	println(text)
+
+	bytes, _ := json.Marshal(record)
+	println(string(bytes))
+
+	assert.NotNil(t, record)
+}
diff --git a/weed/pb/Makefile b/weed/pb/Makefile
index f76ec3814..cc2c064b9 100644
--- a/weed/pb/Makefile
+++ b/weed/pb/Makefile
@@ -11,6 +11,7 @@ gen:
 	protoc mount.proto --go_out=./mount_pb --go-grpc_out=./mount_pb --go_opt=paths=source_relative --go-grpc_opt=paths=source_relative
 	protoc s3.proto --go_out=./s3_pb --go-grpc_out=./s3_pb --go_opt=paths=source_relative --go-grpc_opt=paths=source_relative
 	protoc mq.proto --go_out=./mq_pb --go-grpc_out=./mq_pb --go_opt=paths=source_relative --go-grpc_opt=paths=source_relative
+	protoc schema.proto --go_out=./schema_pb --go-grpc_out=./schema_pb --go_opt=paths=source_relative --go-grpc_opt=paths=source_relative
 	# protoc filer.proto --java_out=../../other/java/client/src/main/java
 	cp filer.proto ../../other/java/client/src/main/proto
 
diff --git a/weed/pb/schema.proto b/weed/pb/schema.proto
new file mode 100644
index 000000000..1e80edb6c
--- /dev/null
+++ b/weed/pb/schema.proto
@@ -0,0 +1,40 @@
+syntax = "proto3";
+
+package schema_pb;
+
+option go_package = "github.com/seaweedfs/seaweedfs/weed/pb/schema_pb";
+
+message RecordType {
+    repeated Field fields = 2;
+}
+
+message Field {
+    string name = 1;
+    Type type = 2;
+    int32 index = 3;
+    bool is_optional = 4;
+    bool is_repeated = 5;
+}
+
+message Type {
+    oneof kind {
+        ScalarType scalar_type = 1;
+        RecordType record_type = 2;
+        MapType map_type = 3;
+    }
+}
+
+enum ScalarType {
+    BOOLEAN = 0;
+    INTEGER = 1;
+    LONG = 3;
+    FLOAT = 4;
+    DOUBLE = 5;
+    BYTES = 6;
+    STRING = 7;
+}
+
+message MapType {
+    // key is always string
+    Type value = 1;
+}
diff --git a/weed/pb/schema_pb/schema.pb.go b/weed/pb/schema_pb/schema.pb.go
new file mode 100644
index 000000000..e5c0d909a
--- /dev/null
+++ b/weed/pb/schema_pb/schema.pb.go
@@ -0,0 +1,520 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.32.0
+// 	protoc        v4.25.3
+// source: schema.proto
+
+package schema_pb
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type ScalarType int32
+
+const (
+	ScalarType_BOOLEAN ScalarType = 0
+	ScalarType_INTEGER ScalarType = 1
+	ScalarType_LONG    ScalarType = 3
+	ScalarType_FLOAT   ScalarType = 4
+	ScalarType_DOUBLE  ScalarType = 5
+	ScalarType_BYTES   ScalarType = 6
+	ScalarType_STRING  ScalarType = 7
+)
+
+// Enum value maps for ScalarType.
+var (
+	ScalarType_name = map[int32]string{
+		0: "BOOLEAN",
+		1: "INTEGER",
+		3: "LONG",
+		4: "FLOAT",
+		5: "DOUBLE",
+		6: "BYTES",
+		7: "STRING",
+	}
+	ScalarType_value = map[string]int32{
+		"BOOLEAN": 0,
+		"INTEGER": 1,
+		"LONG":    3,
+		"FLOAT":   4,
+		"DOUBLE":  5,
+		"BYTES":   6,
+		"STRING":  7,
+	}
+)
+
+func (x ScalarType) Enum() *ScalarType {
+	p := new(ScalarType)
+	*p = x
+	return p
+}
+
+func (x ScalarType) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (ScalarType) Descriptor() protoreflect.EnumDescriptor {
+	return file_schema_proto_enumTypes[0].Descriptor()
+}
+
+func (ScalarType) Type() protoreflect.EnumType {
+	return &file_schema_proto_enumTypes[0]
+}
+
+func (x ScalarType) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use ScalarType.Descriptor instead.
+func (ScalarType) EnumDescriptor() ([]byte, []int) {
+	return file_schema_proto_rawDescGZIP(), []int{0}
+}
+
+type RecordType struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Fields []*Field `protobuf:"bytes,2,rep,name=fields,proto3" json:"fields,omitempty"`
+}
+
+func (x *RecordType) Reset() {
+	*x = RecordType{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_schema_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *RecordType) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*RecordType) ProtoMessage() {}
+
+func (x *RecordType) ProtoReflect() protoreflect.Message {
+	mi := &file_schema_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use RecordType.ProtoReflect.Descriptor instead.
+func (*RecordType) Descriptor() ([]byte, []int) {
+	return file_schema_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *RecordType) GetFields() []*Field {
+	if x != nil {
+		return x.Fields
+	}
+	return nil
+}
+
+type Field struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Name       string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
+	Type       *Type  `protobuf:"bytes,2,opt,name=type,proto3" json:"type,omitempty"`
+	Index      int32  `protobuf:"varint,3,opt,name=index,proto3" json:"index,omitempty"`
+	IsOptional bool   `protobuf:"varint,4,opt,name=is_optional,json=isOptional,proto3" json:"is_optional,omitempty"`
+	IsRepeated bool   `protobuf:"varint,5,opt,name=is_repeated,json=isRepeated,proto3" json:"is_repeated,omitempty"`
+}
+
+func (x *Field) Reset() {
+	*x = Field{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_schema_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Field) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Field) ProtoMessage() {}
+
+func (x *Field) ProtoReflect() protoreflect.Message {
+	mi := &file_schema_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Field.ProtoReflect.Descriptor instead.
+func (*Field) Descriptor() ([]byte, []int) {
+	return file_schema_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *Field) GetName() string {
+	if x != nil {
+		return x.Name
+	}
+	return ""
+}
+
+func (x *Field) GetType() *Type {
+	if x != nil {
+		return x.Type
+	}
+	return nil
+}
+
+func (x *Field) GetIndex() int32 {
+	if x != nil {
+		return x.Index
+	}
+	return 0
+}
+
+func (x *Field) GetIsOptional() bool {
+	if x != nil {
+		return x.IsOptional
+	}
+	return false
+}
+
+func (x *Field) GetIsRepeated() bool {
+	if x != nil {
+		return x.IsRepeated
+	}
+	return false
+}
+
+type Type struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// Types that are assignable to Kind:
+	//
+	//	*Type_ScalarType
+	//	*Type_RecordType
+	//	*Type_MapType
+	Kind isType_Kind `protobuf_oneof:"kind"`
+}
+
+func (x *Type) Reset() {
+	*x = Type{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_schema_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Type) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Type) ProtoMessage() {}
+
+func (x *Type) ProtoReflect() protoreflect.Message {
+	mi := &file_schema_proto_msgTypes[2]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Type.ProtoReflect.Descriptor instead.
+func (*Type) Descriptor() ([]byte, []int) {
+	return file_schema_proto_rawDescGZIP(), []int{2}
+}
+
+func (m *Type) GetKind() isType_Kind {
+	if m != nil {
+		return m.Kind
+	}
+	return nil
+}
+
+func (x *Type) GetScalarType() ScalarType {
+	if x, ok := x.GetKind().(*Type_ScalarType); ok {
+		return x.ScalarType
+	}
+	return ScalarType_BOOLEAN
+}
+
+func (x *Type) GetRecordType() *RecordType {
+	if x, ok := x.GetKind().(*Type_RecordType); ok {
+		return x.RecordType
+	}
+	return nil
+}
+
+func (x *Type) GetMapType() *MapType {
+	if x, ok := x.GetKind().(*Type_MapType); ok {
+		return x.MapType
+	}
+	return nil
+}
+
+type isType_Kind interface {
+	isType_Kind()
+}
+
+type Type_ScalarType struct {
+	ScalarType ScalarType `protobuf:"varint,1,opt,name=scalar_type,json=scalarType,proto3,enum=schema_pb.ScalarType,oneof"`
+}
+
+type Type_RecordType struct {
+	RecordType *RecordType `protobuf:"bytes,2,opt,name=record_type,json=recordType,proto3,oneof"`
+}
+
+type Type_MapType struct {
+	MapType *MapType `protobuf:"bytes,3,opt,name=map_type,json=mapType,proto3,oneof"`
+}
+
+func (*Type_ScalarType) isType_Kind() {}
+
+func (*Type_RecordType) isType_Kind() {}
+
+func (*Type_MapType) isType_Kind() {}
+
+type MapType struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Key   string `protobuf:"bytes,1,opt,name=key,proto3" json:"key,omitempty"`
+	Value *Type  `protobuf:"bytes,2,opt,name=value,proto3" json:"value,omitempty"`
+}
+
+func (x *MapType) Reset() {
+	*x = MapType{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_schema_proto_msgTypes[3]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *MapType) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*MapType) ProtoMessage() {}
+
+func (x *MapType) ProtoReflect() protoreflect.Message {
+	mi := &file_schema_proto_msgTypes[3]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use MapType.ProtoReflect.Descriptor instead.
+func (*MapType) Descriptor() ([]byte, []int) {
+	return file_schema_proto_rawDescGZIP(), []int{3}
+}
+
+func (x *MapType) GetKey() string {
+	if x != nil {
+		return x.Key
+	}
+	return ""
+}
+
+func (x *MapType) GetValue() *Type {
+	if x != nil {
+		return x.Value
+	}
+	return nil
+}
+
+var File_schema_proto protoreflect.FileDescriptor
+
+var file_schema_proto_rawDesc = []byte{
+	0x0a, 0x0c, 0x73, 0x63, 0x68, 0x65, 0x6d, 0x61, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x09,
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+	0x0a, 0x04, 0x4c, 0x4f, 0x4e, 0x47, 0x10, 0x03, 0x12, 0x09, 0x0a, 0x05, 0x46, 0x4c, 0x4f, 0x41,
+	0x54, 0x10, 0x04, 0x12, 0x0a, 0x0a, 0x06, 0x44, 0x4f, 0x55, 0x42, 0x4c, 0x45, 0x10, 0x05, 0x12,
+	0x09, 0x0a, 0x05, 0x42, 0x59, 0x54, 0x45, 0x53, 0x10, 0x06, 0x12, 0x0a, 0x0a, 0x06, 0x53, 0x54,
+	0x52, 0x49, 0x4e, 0x47, 0x10, 0x07, 0x42, 0x32, 0x5a, 0x30, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62,
+	0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x73, 0x65, 0x61, 0x77, 0x65, 0x65, 0x64, 0x66, 0x73, 0x2f, 0x73,
+	0x65, 0x61, 0x77, 0x65, 0x65, 0x64, 0x66, 0x73, 0x2f, 0x77, 0x65, 0x65, 0x64, 0x2f, 0x70, 0x62,
+	0x2f, 0x73, 0x63, 0x68, 0x65, 0x6d, 0x61, 0x5f, 0x70, 0x62, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74,
+	0x6f, 0x33,
+}
+
+var (
+	file_schema_proto_rawDescOnce sync.Once
+	file_schema_proto_rawDescData = file_schema_proto_rawDesc
+)
+
+func file_schema_proto_rawDescGZIP() []byte {
+	file_schema_proto_rawDescOnce.Do(func() {
+		file_schema_proto_rawDescData = protoimpl.X.CompressGZIP(file_schema_proto_rawDescData)
+	})
+	return file_schema_proto_rawDescData
+}
+
+var file_schema_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
+var file_schema_proto_msgTypes = make([]protoimpl.MessageInfo, 4)
+var file_schema_proto_goTypes = []interface{}{
+	(ScalarType)(0),    // 0: schema_pb.ScalarType
+	(*RecordType)(nil), // 1: schema_pb.RecordType
+	(*Field)(nil),      // 2: schema_pb.Field
+	(*Type)(nil),       // 3: schema_pb.Type
+	(*MapType)(nil),    // 4: schema_pb.MapType
+}
+var file_schema_proto_depIdxs = []int32{
+	2, // 0: schema_pb.RecordType.fields:type_name -> schema_pb.Field
+	3, // 1: schema_pb.Field.type:type_name -> schema_pb.Type
+	0, // 2: schema_pb.Type.scalar_type:type_name -> schema_pb.ScalarType
+	1, // 3: schema_pb.Type.record_type:type_name -> schema_pb.RecordType
+	4, // 4: schema_pb.Type.map_type:type_name -> schema_pb.MapType
+	3, // 5: schema_pb.MapType.value:type_name -> schema_pb.Type
+	6, // [6:6] is the sub-list for method output_type
+	6, // [6:6] is the sub-list for method input_type
+	6, // [6:6] is the sub-list for extension type_name
+	6, // [6:6] is the sub-list for extension extendee
+	0, // [0:6] is the sub-list for field type_name
+}
+
+func init() { file_schema_proto_init() }
+func file_schema_proto_init() {
+	if File_schema_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_schema_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*RecordType); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_schema_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Field); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_schema_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Type); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_schema_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*MapType); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	file_schema_proto_msgTypes[2].OneofWrappers = []interface{}{
+		(*Type_ScalarType)(nil),
+		(*Type_RecordType)(nil),
+		(*Type_MapType)(nil),
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_schema_proto_rawDesc,
+			NumEnums:      1,
+			NumMessages:   4,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_schema_proto_goTypes,
+		DependencyIndexes: file_schema_proto_depIdxs,
+		EnumInfos:         file_schema_proto_enumTypes,
+		MessageInfos:      file_schema_proto_msgTypes,
+	}.Build()
+	File_schema_proto = out.File
+	file_schema_proto_rawDesc = nil
+	file_schema_proto_goTypes = nil
+	file_schema_proto_depIdxs = nil
+}