From 17dbca3ec4a6fb5ebe29a2c86744673cc31fcda5 Mon Sep 17 00:00:00 2001
From: Hougang Liu <liuhgXA@gmail.com>
Date: Tue, 21 May 2019 22:36:04 -0500
Subject: [PATCH] Implement GetExperimentInDB (#558)

* Implement GetExperimentInDB

* Parse ErrNoRows error

* Fix pod ready condition in test script

* Add PreCheckRegisterExperiment
---
 cmd/manager/v1alpha2/main.go                  |   8 +
 pkg/api/v1alpha2/api.pb.go                    | 431 ++++++++++--------
 pkg/api/v1alpha2/api.pb.gw.go                 |  46 ++
 pkg/api/v1alpha2/api.proto                    |  14 +
 pkg/api/v1alpha2/api.swagger.json             |  36 ++
 pkg/api/v1alpha2/gen-doc/api.md               | 189 ++++----
 pkg/api/v1alpha2/gen-doc/index.html           | 359 ++++-----------
 pkg/api/v1alpha2/python/api_pb2.py            | 259 +++++++----
 pkg/api/v1alpha2/python/api_pb2_grpc.py       |  18 +
 pkg/common/v1alpha2/katib_manager_util.go     |  11 +
 .../experiment/managerclient/managerclient.go |  13 +-
 .../experiment/validator/validator.go         |  13 +-
 .../experiment/validator/validator_test.go    |  17 +-
 pkg/db/v1alpha2/interface.go                  |  14 +
 pkg/mock/v1alpha2/api/manager.go              |  20 +
 pkg/mock/v1alpha2/db/db.go                    |  15 +
 .../experiment/managerclient/managerclient.go |  14 +-
 test/scripts/v1alpha2/run-tests.sh            |   2 +-
 18 files changed, 819 insertions(+), 660 deletions(-)

diff --git a/cmd/manager/v1alpha2/main.go b/cmd/manager/v1alpha2/main.go
index 72ac1535dca..220f4500df4 100644
--- a/cmd/manager/v1alpha2/main.go
+++ b/cmd/manager/v1alpha2/main.go
@@ -31,6 +31,14 @@ func (s *server) RegisterExperiment(ctx context.Context, in *api_pb.RegisterExpe
 	return &api_pb.RegisterExperimentReply{}, err
 }
 
+// Register a Experiment to DB.
+func (s *server) PreCheckRegisterExperiment(ctx context.Context, in *api_pb.RegisterExperimentRequest) (*api_pb.PreCheckRegisterExperimentReply, error) {
+	can_register, err := dbIf.PreCheckRegisterExperiment(in.Experiment)
+	return &api_pb.PreCheckRegisterExperimentReply{
+		CanRegister: can_register,
+	}, err
+}
+
 // Delete a Experiment from DB by name.
 func (s *server) DeleteExperiment(ctx context.Context, in *api_pb.DeleteExperimentRequest) (*api_pb.DeleteExperimentReply, error) {
 	err := dbIf.DeleteExperiment(in.ExperimentName)
diff --git a/pkg/api/v1alpha2/api.pb.go b/pkg/api/v1alpha2/api.pb.go
index 30d019effba..a43ced37a6d 100644
--- a/pkg/api/v1alpha2/api.pb.go
+++ b/pkg/api/v1alpha2/api.pb.go
@@ -30,6 +30,7 @@ It has these top-level messages:
 	Trial
 	RegisterExperimentRequest
 	RegisterExperimentReply
+	PreCheckRegisterExperimentReply
 	DeleteExperimentRequest
 	DeleteExperimentReply
 	GetExperimentRequest
@@ -944,6 +945,24 @@ func (m *RegisterExperimentReply) String() string            { return proto.Comp
 func (*RegisterExperimentReply) ProtoMessage()               {}
 func (*RegisterExperimentReply) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{21} }
 
+type PreCheckRegisterExperimentReply struct {
+	CanRegister bool `protobuf:"varint,1,opt,name=can_register,json=canRegister" json:"can_register,omitempty"`
+}
+
+func (m *PreCheckRegisterExperimentReply) Reset()         { *m = PreCheckRegisterExperimentReply{} }
+func (m *PreCheckRegisterExperimentReply) String() string { return proto.CompactTextString(m) }
+func (*PreCheckRegisterExperimentReply) ProtoMessage()    {}
+func (*PreCheckRegisterExperimentReply) Descriptor() ([]byte, []int) {
+	return fileDescriptor0, []int{22}
+}
+
+func (m *PreCheckRegisterExperimentReply) GetCanRegister() bool {
+	if m != nil {
+		return m.CanRegister
+	}
+	return false
+}
+
 type DeleteExperimentRequest struct {
 	ExperimentName string `protobuf:"bytes,1,opt,name=experiment_name,json=experimentName" json:"experiment_name,omitempty"`
 }
@@ -951,7 +970,7 @@ type DeleteExperimentRequest struct {
 func (m *DeleteExperimentRequest) Reset()                    { *m = DeleteExperimentRequest{} }
 func (m *DeleteExperimentRequest) String() string            { return proto.CompactTextString(m) }
 func (*DeleteExperimentRequest) ProtoMessage()               {}
-func (*DeleteExperimentRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{22} }
+func (*DeleteExperimentRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{23} }
 
 func (m *DeleteExperimentRequest) GetExperimentName() string {
 	if m != nil {
@@ -966,7 +985,7 @@ type DeleteExperimentReply struct {
 func (m *DeleteExperimentReply) Reset()                    { *m = DeleteExperimentReply{} }
 func (m *DeleteExperimentReply) String() string            { return proto.CompactTextString(m) }
 func (*DeleteExperimentReply) ProtoMessage()               {}
-func (*DeleteExperimentReply) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{23} }
+func (*DeleteExperimentReply) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{24} }
 
 type GetExperimentRequest struct {
 	ExperimentName string `protobuf:"bytes,1,opt,name=experiment_name,json=experimentName" json:"experiment_name,omitempty"`
@@ -975,7 +994,7 @@ type GetExperimentRequest struct {
 func (m *GetExperimentRequest) Reset()                    { *m = GetExperimentRequest{} }
 func (m *GetExperimentRequest) String() string            { return proto.CompactTextString(m) }
 func (*GetExperimentRequest) ProtoMessage()               {}
-func (*GetExperimentRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{24} }
+func (*GetExperimentRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{25} }
 
 func (m *GetExperimentRequest) GetExperimentName() string {
 	if m != nil {
@@ -991,7 +1010,7 @@ type GetExperimentReply struct {
 func (m *GetExperimentReply) Reset()                    { *m = GetExperimentReply{} }
 func (m *GetExperimentReply) String() string            { return proto.CompactTextString(m) }
 func (*GetExperimentReply) ProtoMessage()               {}
-func (*GetExperimentReply) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{25} }
+func (*GetExperimentReply) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{26} }
 
 func (m *GetExperimentReply) GetExperiment() *Experiment {
 	if m != nil {
@@ -1008,7 +1027,7 @@ type ExperimentSummary struct {
 func (m *ExperimentSummary) Reset()                    { *m = ExperimentSummary{} }
 func (m *ExperimentSummary) String() string            { return proto.CompactTextString(m) }
 func (*ExperimentSummary) ProtoMessage()               {}
-func (*ExperimentSummary) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{26} }
+func (*ExperimentSummary) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{27} }
 
 func (m *ExperimentSummary) GetExperimentName() string {
 	if m != nil {
@@ -1030,7 +1049,7 @@ type GetExperimentListRequest struct {
 func (m *GetExperimentListRequest) Reset()                    { *m = GetExperimentListRequest{} }
 func (m *GetExperimentListRequest) String() string            { return proto.CompactTextString(m) }
 func (*GetExperimentListRequest) ProtoMessage()               {}
-func (*GetExperimentListRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{27} }
+func (*GetExperimentListRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{28} }
 
 type GetExperimentListReply struct {
 	ExperimentSummaries []*ExperimentSummary `protobuf:"bytes,1,rep,name=experiment_summaries,json=experimentSummaries" json:"experiment_summaries,omitempty"`
@@ -1039,7 +1058,7 @@ type GetExperimentListReply struct {
 func (m *GetExperimentListReply) Reset()                    { *m = GetExperimentListReply{} }
 func (m *GetExperimentListReply) String() string            { return proto.CompactTextString(m) }
 func (*GetExperimentListReply) ProtoMessage()               {}
-func (*GetExperimentListReply) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{28} }
+func (*GetExperimentListReply) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{29} }
 
 func (m *GetExperimentListReply) GetExperimentSummaries() []*ExperimentSummary {
 	if m != nil {
@@ -1056,7 +1075,7 @@ type UpdateExperimentStatusRequest struct {
 func (m *UpdateExperimentStatusRequest) Reset()                    { *m = UpdateExperimentStatusRequest{} }
 func (m *UpdateExperimentStatusRequest) String() string            { return proto.CompactTextString(m) }
 func (*UpdateExperimentStatusRequest) ProtoMessage()               {}
-func (*UpdateExperimentStatusRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{29} }
+func (*UpdateExperimentStatusRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{30} }
 
 func (m *UpdateExperimentStatusRequest) GetExperimentName() string {
 	if m != nil {
@@ -1078,7 +1097,7 @@ type UpdateExperimentStatusReply struct {
 func (m *UpdateExperimentStatusReply) Reset()                    { *m = UpdateExperimentStatusReply{} }
 func (m *UpdateExperimentStatusReply) String() string            { return proto.CompactTextString(m) }
 func (*UpdateExperimentStatusReply) ProtoMessage()               {}
-func (*UpdateExperimentStatusReply) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{30} }
+func (*UpdateExperimentStatusReply) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{31} }
 
 type UpdateAlgorithmExtraSettingsRequest struct {
 	ExperimentName         string              `protobuf:"bytes,1,opt,name=experiment_name,json=experimentName" json:"experiment_name,omitempty"`
@@ -1089,7 +1108,7 @@ func (m *UpdateAlgorithmExtraSettingsRequest) Reset()         { *m = UpdateAlgor
 func (m *UpdateAlgorithmExtraSettingsRequest) String() string { return proto.CompactTextString(m) }
 func (*UpdateAlgorithmExtraSettingsRequest) ProtoMessage()    {}
 func (*UpdateAlgorithmExtraSettingsRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor0, []int{31}
+	return fileDescriptor0, []int{32}
 }
 
 func (m *UpdateAlgorithmExtraSettingsRequest) GetExperimentName() string {
@@ -1113,7 +1132,7 @@ func (m *UpdateAlgorithmExtraSettingsReply) Reset()         { *m = UpdateAlgorit
 func (m *UpdateAlgorithmExtraSettingsReply) String() string { return proto.CompactTextString(m) }
 func (*UpdateAlgorithmExtraSettingsReply) ProtoMessage()    {}
 func (*UpdateAlgorithmExtraSettingsReply) Descriptor() ([]byte, []int) {
-	return fileDescriptor0, []int{32}
+	return fileDescriptor0, []int{33}
 }
 
 type GetAlgorithmExtraSettingsRequest struct {
@@ -1124,7 +1143,7 @@ func (m *GetAlgorithmExtraSettingsRequest) Reset()         { *m = GetAlgorithmEx
 func (m *GetAlgorithmExtraSettingsRequest) String() string { return proto.CompactTextString(m) }
 func (*GetAlgorithmExtraSettingsRequest) ProtoMessage()    {}
 func (*GetAlgorithmExtraSettingsRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor0, []int{33}
+	return fileDescriptor0, []int{34}
 }
 
 func (m *GetAlgorithmExtraSettingsRequest) GetExperimentName() string {
@@ -1141,7 +1160,7 @@ type GetAlgorithmExtraSettingsReply struct {
 func (m *GetAlgorithmExtraSettingsReply) Reset()                    { *m = GetAlgorithmExtraSettingsReply{} }
 func (m *GetAlgorithmExtraSettingsReply) String() string            { return proto.CompactTextString(m) }
 func (*GetAlgorithmExtraSettingsReply) ProtoMessage()               {}
-func (*GetAlgorithmExtraSettingsReply) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{34} }
+func (*GetAlgorithmExtraSettingsReply) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{35} }
 
 func (m *GetAlgorithmExtraSettingsReply) GetExtraAlgorithmSettings() []*AlgorithmSetting {
 	if m != nil {
@@ -1157,7 +1176,7 @@ type RegisterTrialRequest struct {
 func (m *RegisterTrialRequest) Reset()                    { *m = RegisterTrialRequest{} }
 func (m *RegisterTrialRequest) String() string            { return proto.CompactTextString(m) }
 func (*RegisterTrialRequest) ProtoMessage()               {}
-func (*RegisterTrialRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{35} }
+func (*RegisterTrialRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{36} }
 
 func (m *RegisterTrialRequest) GetTrial() *Trial {
 	if m != nil {
@@ -1172,7 +1191,7 @@ type RegisterTrialReply struct {
 func (m *RegisterTrialReply) Reset()                    { *m = RegisterTrialReply{} }
 func (m *RegisterTrialReply) String() string            { return proto.CompactTextString(m) }
 func (*RegisterTrialReply) ProtoMessage()               {}
-func (*RegisterTrialReply) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{36} }
+func (*RegisterTrialReply) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{37} }
 
 type DeleteTrialRequest struct {
 	TrialName string `protobuf:"bytes,1,opt,name=trial_name,json=trialName" json:"trial_name,omitempty"`
@@ -1181,7 +1200,7 @@ type DeleteTrialRequest struct {
 func (m *DeleteTrialRequest) Reset()                    { *m = DeleteTrialRequest{} }
 func (m *DeleteTrialRequest) String() string            { return proto.CompactTextString(m) }
 func (*DeleteTrialRequest) ProtoMessage()               {}
-func (*DeleteTrialRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{37} }
+func (*DeleteTrialRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{38} }
 
 func (m *DeleteTrialRequest) GetTrialName() string {
 	if m != nil {
@@ -1196,7 +1215,7 @@ type DeleteTrialReply struct {
 func (m *DeleteTrialReply) Reset()                    { *m = DeleteTrialReply{} }
 func (m *DeleteTrialReply) String() string            { return proto.CompactTextString(m) }
 func (*DeleteTrialReply) ProtoMessage()               {}
-func (*DeleteTrialReply) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{38} }
+func (*DeleteTrialReply) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{39} }
 
 type GetTrialListRequest struct {
 	ExperimentName string `protobuf:"bytes,1,opt,name=experiment_name,json=experimentName" json:"experiment_name,omitempty"`
@@ -1206,7 +1225,7 @@ type GetTrialListRequest struct {
 func (m *GetTrialListRequest) Reset()                    { *m = GetTrialListRequest{} }
 func (m *GetTrialListRequest) String() string            { return proto.CompactTextString(m) }
 func (*GetTrialListRequest) ProtoMessage()               {}
-func (*GetTrialListRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{39} }
+func (*GetTrialListRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{40} }
 
 func (m *GetTrialListRequest) GetExperimentName() string {
 	if m != nil {
@@ -1229,7 +1248,7 @@ type GetTrialListReply struct {
 func (m *GetTrialListReply) Reset()                    { *m = GetTrialListReply{} }
 func (m *GetTrialListReply) String() string            { return proto.CompactTextString(m) }
 func (*GetTrialListReply) ProtoMessage()               {}
-func (*GetTrialListReply) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{40} }
+func (*GetTrialListReply) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{41} }
 
 func (m *GetTrialListReply) GetTrials() []*Trial {
 	if m != nil {
@@ -1245,7 +1264,7 @@ type GetTrialRequest struct {
 func (m *GetTrialRequest) Reset()                    { *m = GetTrialRequest{} }
 func (m *GetTrialRequest) String() string            { return proto.CompactTextString(m) }
 func (*GetTrialRequest) ProtoMessage()               {}
-func (*GetTrialRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{41} }
+func (*GetTrialRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{42} }
 
 func (m *GetTrialRequest) GetTrialName() string {
 	if m != nil {
@@ -1261,7 +1280,7 @@ type GetTrialReply struct {
 func (m *GetTrialReply) Reset()                    { *m = GetTrialReply{} }
 func (m *GetTrialReply) String() string            { return proto.CompactTextString(m) }
 func (*GetTrialReply) ProtoMessage()               {}
-func (*GetTrialReply) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{42} }
+func (*GetTrialReply) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{43} }
 
 func (m *GetTrialReply) GetTrial() *Trial {
 	if m != nil {
@@ -1278,7 +1297,7 @@ type UpdateTrialStatusRequest struct {
 func (m *UpdateTrialStatusRequest) Reset()                    { *m = UpdateTrialStatusRequest{} }
 func (m *UpdateTrialStatusRequest) String() string            { return proto.CompactTextString(m) }
 func (*UpdateTrialStatusRequest) ProtoMessage()               {}
-func (*UpdateTrialStatusRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{43} }
+func (*UpdateTrialStatusRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{44} }
 
 func (m *UpdateTrialStatusRequest) GetTrialName() string {
 	if m != nil {
@@ -1300,7 +1319,7 @@ type UpdateTrialStatusReply struct {
 func (m *UpdateTrialStatusReply) Reset()                    { *m = UpdateTrialStatusReply{} }
 func (m *UpdateTrialStatusReply) String() string            { return proto.CompactTextString(m) }
 func (*UpdateTrialStatusReply) ProtoMessage()               {}
-func (*UpdateTrialStatusReply) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{44} }
+func (*UpdateTrialStatusReply) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{45} }
 
 type ReportObservationLogRequest struct {
 	TrialName      string          `protobuf:"bytes,1,opt,name=trial_name,json=trialName" json:"trial_name,omitempty"`
@@ -1310,7 +1329,7 @@ type ReportObservationLogRequest struct {
 func (m *ReportObservationLogRequest) Reset()                    { *m = ReportObservationLogRequest{} }
 func (m *ReportObservationLogRequest) String() string            { return proto.CompactTextString(m) }
 func (*ReportObservationLogRequest) ProtoMessage()               {}
-func (*ReportObservationLogRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{45} }
+func (*ReportObservationLogRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{46} }
 
 func (m *ReportObservationLogRequest) GetTrialName() string {
 	if m != nil {
@@ -1332,7 +1351,7 @@ type ReportObservationLogReply struct {
 func (m *ReportObservationLogReply) Reset()                    { *m = ReportObservationLogReply{} }
 func (m *ReportObservationLogReply) String() string            { return proto.CompactTextString(m) }
 func (*ReportObservationLogReply) ProtoMessage()               {}
-func (*ReportObservationLogReply) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{46} }
+func (*ReportObservationLogReply) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{47} }
 
 type GetObservationLogRequest struct {
 	TrialName  string `protobuf:"bytes,1,opt,name=trial_name,json=trialName" json:"trial_name,omitempty"`
@@ -1344,7 +1363,7 @@ type GetObservationLogRequest struct {
 func (m *GetObservationLogRequest) Reset()                    { *m = GetObservationLogRequest{} }
 func (m *GetObservationLogRequest) String() string            { return proto.CompactTextString(m) }
 func (*GetObservationLogRequest) ProtoMessage()               {}
-func (*GetObservationLogRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{47} }
+func (*GetObservationLogRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{48} }
 
 func (m *GetObservationLogRequest) GetTrialName() string {
 	if m != nil {
@@ -1381,7 +1400,7 @@ type GetObservationLogReply struct {
 func (m *GetObservationLogReply) Reset()                    { *m = GetObservationLogReply{} }
 func (m *GetObservationLogReply) String() string            { return proto.CompactTextString(m) }
 func (*GetObservationLogReply) ProtoMessage()               {}
-func (*GetObservationLogReply) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{48} }
+func (*GetObservationLogReply) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{49} }
 
 func (m *GetObservationLogReply) GetObservationLog() *ObservationLog {
 	if m != nil {
@@ -1399,7 +1418,7 @@ type GetSuggestionsRequest struct {
 func (m *GetSuggestionsRequest) Reset()                    { *m = GetSuggestionsRequest{} }
 func (m *GetSuggestionsRequest) String() string            { return proto.CompactTextString(m) }
 func (*GetSuggestionsRequest) ProtoMessage()               {}
-func (*GetSuggestionsRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{49} }
+func (*GetSuggestionsRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{50} }
 
 func (m *GetSuggestionsRequest) GetExperimentName() string {
 	if m != nil {
@@ -1429,7 +1448,7 @@ type GetSuggestionsReply struct {
 func (m *GetSuggestionsReply) Reset()                    { *m = GetSuggestionsReply{} }
 func (m *GetSuggestionsReply) String() string            { return proto.CompactTextString(m) }
 func (*GetSuggestionsReply) ProtoMessage()               {}
-func (*GetSuggestionsReply) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{50} }
+func (*GetSuggestionsReply) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{51} }
 
 func (m *GetSuggestionsReply) GetTrials() []*Trial {
 	if m != nil {
@@ -1447,7 +1466,7 @@ func (m *ValidateAlgorithmSettingsRequest) Reset()         { *m = ValidateAlgori
 func (m *ValidateAlgorithmSettingsRequest) String() string { return proto.CompactTextString(m) }
 func (*ValidateAlgorithmSettingsRequest) ProtoMessage()    {}
 func (*ValidateAlgorithmSettingsRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor0, []int{51}
+	return fileDescriptor0, []int{52}
 }
 
 func (m *ValidateAlgorithmSettingsRequest) GetExperimentSpec() *ExperimentSpec {
@@ -1472,7 +1491,7 @@ type ValidateAlgorithmSettingsReply struct {
 func (m *ValidateAlgorithmSettingsReply) Reset()                    { *m = ValidateAlgorithmSettingsReply{} }
 func (m *ValidateAlgorithmSettingsReply) String() string            { return proto.CompactTextString(m) }
 func (*ValidateAlgorithmSettingsReply) ProtoMessage()               {}
-func (*ValidateAlgorithmSettingsReply) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{52} }
+func (*ValidateAlgorithmSettingsReply) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{53} }
 
 func init() {
 	proto.RegisterType((*FeasibleSpace)(nil), "api.v1.alpha2.FeasibleSpace")
@@ -1501,6 +1520,7 @@ func init() {
 	proto.RegisterType((*Trial)(nil), "api.v1.alpha2.Trial")
 	proto.RegisterType((*RegisterExperimentRequest)(nil), "api.v1.alpha2.RegisterExperimentRequest")
 	proto.RegisterType((*RegisterExperimentReply)(nil), "api.v1.alpha2.RegisterExperimentReply")
+	proto.RegisterType((*PreCheckRegisterExperimentReply)(nil), "api.v1.alpha2.PreCheckRegisterExperimentReply")
 	proto.RegisterType((*DeleteExperimentRequest)(nil), "api.v1.alpha2.DeleteExperimentRequest")
 	proto.RegisterType((*DeleteExperimentReply)(nil), "api.v1.alpha2.DeleteExperimentReply")
 	proto.RegisterType((*GetExperimentRequest)(nil), "api.v1.alpha2.GetExperimentRequest")
@@ -1553,6 +1573,9 @@ type ManagerClient interface {
 	// Register a Experiment to DB.
 	RegisterExperiment(ctx context.Context, in *RegisterExperimentRequest, opts ...grpc.CallOption) (*RegisterExperimentReply, error)
 	// *
+	// PreCheck to register a Experiment to DB.
+	PreCheckRegisterExperiment(ctx context.Context, in *RegisterExperimentRequest, opts ...grpc.CallOption) (*PreCheckRegisterExperimentReply, error)
+	// *
 	// Delete a Experiment from DB by name.
 	DeleteExperiment(ctx context.Context, in *DeleteExperimentRequest, opts ...grpc.CallOption) (*DeleteExperimentReply, error)
 	// *
@@ -1623,6 +1646,15 @@ func (c *managerClient) RegisterExperiment(ctx context.Context, in *RegisterExpe
 	return out, nil
 }
 
+func (c *managerClient) PreCheckRegisterExperiment(ctx context.Context, in *RegisterExperimentRequest, opts ...grpc.CallOption) (*PreCheckRegisterExperimentReply, error) {
+	out := new(PreCheckRegisterExperimentReply)
+	err := grpc.Invoke(ctx, "/api.v1.alpha2.Manager/PreCheckRegisterExperiment", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 func (c *managerClient) DeleteExperiment(ctx context.Context, in *DeleteExperimentRequest, opts ...grpc.CallOption) (*DeleteExperimentReply, error) {
 	out := new(DeleteExperimentReply)
 	err := grpc.Invoke(ctx, "/api.v1.alpha2.Manager/DeleteExperiment", in, out, c.cc, opts...)
@@ -1765,6 +1797,9 @@ type ManagerServer interface {
 	// Register a Experiment to DB.
 	RegisterExperiment(context.Context, *RegisterExperimentRequest) (*RegisterExperimentReply, error)
 	// *
+	// PreCheck to register a Experiment to DB.
+	PreCheckRegisterExperiment(context.Context, *RegisterExperimentRequest) (*PreCheckRegisterExperimentReply, error)
+	// *
 	// Delete a Experiment from DB by name.
 	DeleteExperiment(context.Context, *DeleteExperimentRequest) (*DeleteExperimentReply, error)
 	// *
@@ -1840,6 +1875,24 @@ func _Manager_RegisterExperiment_Handler(srv interface{}, ctx context.Context, d
 	return interceptor(ctx, in, info, handler)
 }
 
+func _Manager_PreCheckRegisterExperiment_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(RegisterExperimentRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ManagerServer).PreCheckRegisterExperiment(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/api.v1.alpha2.Manager/PreCheckRegisterExperiment",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ManagerServer).PreCheckRegisterExperiment(ctx, req.(*RegisterExperimentRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 func _Manager_DeleteExperiment_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
 	in := new(DeleteExperimentRequest)
 	if err := dec(in); err != nil {
@@ -2118,6 +2171,10 @@ var _Manager_serviceDesc = grpc.ServiceDesc{
 			MethodName: "RegisterExperiment",
 			Handler:    _Manager_RegisterExperiment_Handler,
 		},
+		{
+			MethodName: "PreCheckRegisterExperiment",
+			Handler:    _Manager_PreCheckRegisterExperiment_Handler,
+		},
 		{
 			MethodName: "DeleteExperiment",
 			Handler:    _Manager_DeleteExperiment_Handler,
@@ -2313,158 +2370,162 @@ var _EarlyStopping_serviceDesc = grpc.ServiceDesc{
 func init() { proto.RegisterFile("api.proto", fileDescriptor0) }
 
 var fileDescriptor0 = []byte{
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+	0x95, 0x5e, 0x47, 0x96, 0xef, 0xd2, 0xcb, 0x21, 0x96, 0xa9, 0x8b, 0x36, 0x84, 0xd5, 0xfa, 0xbf,
+	0x05, 0x00, 0xdf, 0x07, 0xf2, 0xf9, 0x7f, 0x2f, 0x86, 0xe4, 0xf9, 0xff, 0x30, 0x34, 0xf5, 0x59,
+	0x28, 0x84, 0xfe, 0xe1, 0xe1, 0x60, 0x0a, 0xff, 0xbb, 0xe7, 0xbd, 0xff, 0x04, 0x00, 0x00, 0xff,
+	0xff, 0x8b, 0x40, 0x8a, 0x6f, 0x17, 0x24, 0x00, 0x00,
 }
diff --git a/pkg/api/v1alpha2/api.pb.gw.go b/pkg/api/v1alpha2/api.pb.gw.go
index 1fafb9cef5b..aa65dcbb750 100644
--- a/pkg/api/v1alpha2/api.pb.gw.go
+++ b/pkg/api/v1alpha2/api.pb.gw.go
@@ -41,6 +41,19 @@ func request_Manager_RegisterExperiment_0(ctx context.Context, marshaler runtime
 
 }
 
+func request_Manager_PreCheckRegisterExperiment_0(ctx context.Context, marshaler runtime.Marshaler, client ManagerClient, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error) {
+	var protoReq RegisterExperimentRequest
+	var metadata runtime.ServerMetadata
+
+	if err := marshaler.NewDecoder(req.Body).Decode(&protoReq.Experiment); err != nil {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", err)
+	}
+
+	msg, err := client.PreCheckRegisterExperiment(ctx, &protoReq, grpc.Header(&metadata.HeaderMD), grpc.Trailer(&metadata.TrailerMD))
+	return msg, metadata, err
+
+}
+
 func request_Manager_DeleteExperiment_0(ctx context.Context, marshaler runtime.Marshaler, client ManagerClient, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error) {
 	var protoReq DeleteExperimentRequest
 	var metadata runtime.ServerMetadata
@@ -419,6 +432,35 @@ func RegisterManagerHandler(ctx context.Context, mux *runtime.ServeMux, conn *gr
 
 	})
 
+	mux.Handle("POST", pattern_Manager_PreCheckRegisterExperiment_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
+		ctx, cancel := context.WithCancel(ctx)
+		defer cancel()
+		if cn, ok := w.(http.CloseNotifier); ok {
+			go func(done <-chan struct{}, closed <-chan bool) {
+				select {
+				case <-done:
+				case <-closed:
+					cancel()
+				}
+			}(ctx.Done(), cn.CloseNotify())
+		}
+		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
+		rctx, err := runtime.AnnotateContext(ctx, mux, req)
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		resp, md, err := request_Manager_PreCheckRegisterExperiment_0(rctx, inboundMarshaler, client, req, pathParams)
+		ctx = runtime.NewServerMetadataContext(ctx, md)
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+
+		forward_Manager_PreCheckRegisterExperiment_0(ctx, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
+
+	})
+
 	mux.Handle("GET", pattern_Manager_DeleteExperiment_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
 		ctx, cancel := context.WithCancel(ctx)
 		defer cancel()
@@ -860,6 +902,8 @@ func RegisterManagerHandler(ctx context.Context, mux *runtime.ServeMux, conn *gr
 var (
 	pattern_Manager_RegisterExperiment_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"api", "Manager", "RegisterExperiment"}, ""))
 
+	pattern_Manager_PreCheckRegisterExperiment_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"api", "Manager", "PreCheckRegisterExperiment"}, ""))
+
 	pattern_Manager_DeleteExperiment_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3}, []string{"api", "Manager", "DeleteExperiment", "experiment_name"}, ""))
 
 	pattern_Manager_GetExperiment_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3}, []string{"api", "Manager", "GetExperiment", "experiment_name"}, ""))
@@ -894,6 +938,8 @@ var (
 var (
 	forward_Manager_RegisterExperiment_0 = runtime.ForwardResponseMessage
 
+	forward_Manager_PreCheckRegisterExperiment_0 = runtime.ForwardResponseMessage
+
 	forward_Manager_DeleteExperiment_0 = runtime.ForwardResponseMessage
 
 	forward_Manager_GetExperiment_0 = runtime.ForwardResponseMessage
diff --git a/pkg/api/v1alpha2/api.proto b/pkg/api/v1alpha2/api.proto
index 7801a7a6921..185e0259259 100644
--- a/pkg/api/v1alpha2/api.proto
+++ b/pkg/api/v1alpha2/api.proto
@@ -24,6 +24,17 @@ service Manager {
         };
     };
 
+    /**
+     * PreCheck to register a Experiment to DB.
+     */
+    rpc PreCheckRegisterExperiment(RegisterExperimentRequest) returns (PreCheckRegisterExperimentReply){
+        option (google.api.http) = {
+            post: "/api/Manager/PreCheckRegisterExperiment"
+            body: "experiment"
+        };
+    };
+
+
     /** 
      * Delete a Experiment from DB by name.
      */
@@ -392,6 +403,9 @@ message RegisterExperimentRequest {
 message RegisterExperimentReply {
 }
 
+message PreCheckRegisterExperimentReply {
+	bool can_register = 1;
+}
 message DeleteExperimentRequest {
     string experiment_name = 1;
 }
diff --git a/pkg/api/v1alpha2/api.swagger.json b/pkg/api/v1alpha2/api.swagger.json
index 99241bf48c0..396c767cc09 100644
--- a/pkg/api/v1alpha2/api.swagger.json
+++ b/pkg/api/v1alpha2/api.swagger.json
@@ -242,6 +242,33 @@
         ]
       }
     },
+    "/api/Manager/PreCheckRegisterExperiment": {
+      "post": {
+        "summary": "*\nPreCheck to register a Experiment to DB.",
+        "operationId": "PreCheckRegisterExperiment",
+        "responses": {
+          "200": {
+            "description": "",
+            "schema": {
+              "$ref": "#/definitions/alpha2PreCheckRegisterExperimentReply"
+            }
+          }
+        },
+        "parameters": [
+          {
+            "name": "body",
+            "in": "body",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/alpha2Experiment"
+            }
+          }
+        ],
+        "tags": [
+          "Manager"
+        ]
+      }
+    },
     "/api/Manager/RegisterExperiment": {
       "post": {
         "summary": "*\nRegister a Experiment to DB.",
@@ -906,6 +933,15 @@
       "default": "UNKNOWN_TYPE",
       "description": "*\nTypes of value for HyperParameter."
     },
+    "alpha2PreCheckRegisterExperimentReply": {
+      "type": "object",
+      "properties": {
+        "can_register": {
+          "type": "boolean",
+          "format": "boolean"
+        }
+      }
+    },
     "alpha2RegisterExperimentReply": {
       "type": "object"
     },
diff --git a/pkg/api/v1alpha2/gen-doc/api.md b/pkg/api/v1alpha2/gen-doc/api.md
index 1fcfbbd47d1..7fd225dcd79 100644
--- a/pkg/api/v1alpha2/gen-doc/api.md
+++ b/pkg/api/v1alpha2/gen-doc/api.md
@@ -1,5 +1,5 @@
 # Protocol Documentation
-<a name="top"></a>
+<a name="top"/>
 
 ## Table of Contents
 
@@ -43,6 +43,7 @@
     - [Operation.ParameterSpecs](#api.v1.alpha2.Operation.ParameterSpecs)
     - [ParameterAssignment](#api.v1.alpha2.ParameterAssignment)
     - [ParameterSpec](#api.v1.alpha2.ParameterSpec)
+    - [PreCheckRegisterExperimentReply](#api.v1.alpha2.PreCheckRegisterExperimentReply)
     - [RegisterExperimentReply](#api.v1.alpha2.RegisterExperimentReply)
     - [RegisterExperimentRequest](#api.v1.alpha2.RegisterExperimentRequest)
     - [RegisterTrialReply](#api.v1.alpha2.RegisterTrialReply)
@@ -77,14 +78,14 @@
 
 
 
-<a name="api.proto"></a>
+<a name="api.proto"/>
 <p align="right"><a href="#top">Top</a></p>
 
 ## api.proto
 Katib API
 
 
-<a name="api.v1.alpha2.AlgorithmSetting"></a>
+<a name="api.v1.alpha2.AlgorithmSetting"/>
 
 ### AlgorithmSetting
 
@@ -100,7 +101,7 @@ Katib API
 
 
 
-<a name="api.v1.alpha2.AlgorithmSpec"></a>
+<a name="api.v1.alpha2.AlgorithmSpec"/>
 
 ### AlgorithmSpec
 
@@ -117,7 +118,7 @@ Katib API
 
 
 
-<a name="api.v1.alpha2.DeleteExperimentReply"></a>
+<a name="api.v1.alpha2.DeleteExperimentReply"/>
 
 ### DeleteExperimentReply
 
@@ -127,7 +128,7 @@ Katib API
 
 
 
-<a name="api.v1.alpha2.DeleteExperimentRequest"></a>
+<a name="api.v1.alpha2.DeleteExperimentRequest"/>
 
 ### DeleteExperimentRequest
 
@@ -142,7 +143,7 @@ Katib API
 
 
 
-<a name="api.v1.alpha2.DeleteTrialReply"></a>
+<a name="api.v1.alpha2.DeleteTrialReply"/>
 
 ### DeleteTrialReply
 
@@ -152,7 +153,7 @@ Katib API
 
 
 
-<a name="api.v1.alpha2.DeleteTrialRequest"></a>
+<a name="api.v1.alpha2.DeleteTrialRequest"/>
 
 ### DeleteTrialRequest
 
@@ -167,7 +168,7 @@ Katib API
 
 
 
-<a name="api.v1.alpha2.EarlyStoppingSpec"></a>
+<a name="api.v1.alpha2.EarlyStoppingSpec"/>
 
 ### EarlyStoppingSpec
 TODO
@@ -177,7 +178,7 @@ TODO
 
 
 
-<a name="api.v1.alpha2.Experiment"></a>
+<a name="api.v1.alpha2.Experiment"/>
 
 ### Experiment
 
@@ -194,7 +195,7 @@ TODO
 
 
 
-<a name="api.v1.alpha2.ExperimentSpec"></a>
+<a name="api.v1.alpha2.ExperimentSpec"/>
 
 ### ExperimentSpec
 Spec of a Experiment. Experiment represents a single optimization run over a feasible space. 
@@ -218,7 +219,7 @@ It is assumed that objective function f(x) does not change in the course of a Ex
 
 
 
-<a name="api.v1.alpha2.ExperimentSpec.ParameterSpecs"></a>
+<a name="api.v1.alpha2.ExperimentSpec.ParameterSpecs"/>
 
 ### ExperimentSpec.ParameterSpecs
 List of ParameterSpec
@@ -233,7 +234,7 @@ List of ParameterSpec
 
 
 
-<a name="api.v1.alpha2.ExperimentStatus"></a>
+<a name="api.v1.alpha2.ExperimentStatus"/>
 
 ### ExperimentStatus
 
@@ -250,7 +251,7 @@ List of ParameterSpec
 
 
 
-<a name="api.v1.alpha2.ExperimentSummary"></a>
+<a name="api.v1.alpha2.ExperimentSummary"/>
 
 ### ExperimentSummary
 
@@ -266,7 +267,7 @@ List of ParameterSpec
 
 
 
-<a name="api.v1.alpha2.FeasibleSpace"></a>
+<a name="api.v1.alpha2.FeasibleSpace"/>
 
 ### FeasibleSpace
 Feasible space for optimization.
@@ -286,7 +287,7 @@ Discrete and Categorical type use List.
 
 
 
-<a name="api.v1.alpha2.GetAlgorithmExtraSettingsReply"></a>
+<a name="api.v1.alpha2.GetAlgorithmExtraSettingsReply"/>
 
 ### GetAlgorithmExtraSettingsReply
 
@@ -301,7 +302,7 @@ Discrete and Categorical type use List.
 
 
 
-<a name="api.v1.alpha2.GetAlgorithmExtraSettingsRequest"></a>
+<a name="api.v1.alpha2.GetAlgorithmExtraSettingsRequest"/>
 
 ### GetAlgorithmExtraSettingsRequest
 
@@ -316,7 +317,7 @@ Discrete and Categorical type use List.
 
 
 
-<a name="api.v1.alpha2.GetExperimentListReply"></a>
+<a name="api.v1.alpha2.GetExperimentListReply"/>
 
 ### GetExperimentListReply
 
@@ -331,7 +332,7 @@ Discrete and Categorical type use List.
 
 
 
-<a name="api.v1.alpha2.GetExperimentListRequest"></a>
+<a name="api.v1.alpha2.GetExperimentListRequest"/>
 
 ### GetExperimentListRequest
 
@@ -341,7 +342,7 @@ Discrete and Categorical type use List.
 
 
 
-<a name="api.v1.alpha2.GetExperimentReply"></a>
+<a name="api.v1.alpha2.GetExperimentReply"/>
 
 ### GetExperimentReply
 
@@ -356,7 +357,7 @@ Discrete and Categorical type use List.
 
 
 
-<a name="api.v1.alpha2.GetExperimentRequest"></a>
+<a name="api.v1.alpha2.GetExperimentRequest"/>
 
 ### GetExperimentRequest
 
@@ -371,7 +372,7 @@ Discrete and Categorical type use List.
 
 
 
-<a name="api.v1.alpha2.GetObservationLogReply"></a>
+<a name="api.v1.alpha2.GetObservationLogReply"/>
 
 ### GetObservationLogReply
 
@@ -386,7 +387,7 @@ Discrete and Categorical type use List.
 
 
 
-<a name="api.v1.alpha2.GetObservationLogRequest"></a>
+<a name="api.v1.alpha2.GetObservationLogRequest"/>
 
 ### GetObservationLogRequest
 
@@ -404,7 +405,7 @@ Discrete and Categorical type use List.
 
 
 
-<a name="api.v1.alpha2.GetSuggestionsReply"></a>
+<a name="api.v1.alpha2.GetSuggestionsReply"/>
 
 ### GetSuggestionsReply
 
@@ -419,7 +420,7 @@ Discrete and Categorical type use List.
 
 
 
-<a name="api.v1.alpha2.GetSuggestionsRequest"></a>
+<a name="api.v1.alpha2.GetSuggestionsRequest"/>
 
 ### GetSuggestionsRequest
 
@@ -436,7 +437,7 @@ Discrete and Categorical type use List.
 
 
 
-<a name="api.v1.alpha2.GetTrialListReply"></a>
+<a name="api.v1.alpha2.GetTrialListReply"/>
 
 ### GetTrialListReply
 
@@ -451,7 +452,7 @@ Discrete and Categorical type use List.
 
 
 
-<a name="api.v1.alpha2.GetTrialListRequest"></a>
+<a name="api.v1.alpha2.GetTrialListRequest"/>
 
 ### GetTrialListRequest
 
@@ -467,7 +468,7 @@ Discrete and Categorical type use List.
 
 
 
-<a name="api.v1.alpha2.GetTrialReply"></a>
+<a name="api.v1.alpha2.GetTrialReply"/>
 
 ### GetTrialReply
 
@@ -482,7 +483,7 @@ Discrete and Categorical type use List.
 
 
 
-<a name="api.v1.alpha2.GetTrialRequest"></a>
+<a name="api.v1.alpha2.GetTrialRequest"/>
 
 ### GetTrialRequest
 
@@ -497,7 +498,7 @@ Discrete and Categorical type use List.
 
 
 
-<a name="api.v1.alpha2.GraphConfig"></a>
+<a name="api.v1.alpha2.GraphConfig"/>
 
 ### GraphConfig
 GraphConfig contains a config of DAG
@@ -514,7 +515,7 @@ GraphConfig contains a config of DAG
 
 
 
-<a name="api.v1.alpha2.Metric"></a>
+<a name="api.v1.alpha2.Metric"/>
 
 ### Metric
 
@@ -530,7 +531,7 @@ GraphConfig contains a config of DAG
 
 
 
-<a name="api.v1.alpha2.MetricLog"></a>
+<a name="api.v1.alpha2.MetricLog"/>
 
 ### MetricLog
 
@@ -546,7 +547,7 @@ GraphConfig contains a config of DAG
 
 
 
-<a name="api.v1.alpha2.NasConfig"></a>
+<a name="api.v1.alpha2.NasConfig"/>
 
 ### NasConfig
 NasConfig contains a config of NAS job
@@ -562,7 +563,7 @@ NasConfig contains a config of NAS job
 
 
 
-<a name="api.v1.alpha2.NasConfig.Operations"></a>
+<a name="api.v1.alpha2.NasConfig.Operations"/>
 
 ### NasConfig.Operations
 
@@ -577,7 +578,7 @@ NasConfig contains a config of NAS job
 
 
 
-<a name="api.v1.alpha2.ObjectiveSpec"></a>
+<a name="api.v1.alpha2.ObjectiveSpec"/>
 
 ### ObjectiveSpec
 
@@ -595,7 +596,7 @@ NasConfig contains a config of NAS job
 
 
 
-<a name="api.v1.alpha2.Observation"></a>
+<a name="api.v1.alpha2.Observation"/>
 
 ### Observation
 
@@ -610,7 +611,7 @@ NasConfig contains a config of NAS job
 
 
 
-<a name="api.v1.alpha2.ObservationLog"></a>
+<a name="api.v1.alpha2.ObservationLog"/>
 
 ### ObservationLog
 
@@ -625,7 +626,7 @@ NasConfig contains a config of NAS job
 
 
 
-<a name="api.v1.alpha2.Operation"></a>
+<a name="api.v1.alpha2.Operation"/>
 
 ### Operation
 Config for operations in DAG
@@ -641,7 +642,7 @@ Config for operations in DAG
 
 
 
-<a name="api.v1.alpha2.Operation.ParameterSpecs"></a>
+<a name="api.v1.alpha2.Operation.ParameterSpecs"/>
 
 ### Operation.ParameterSpecs
 List of ParameterSpec
@@ -656,7 +657,7 @@ List of ParameterSpec
 
 
 
-<a name="api.v1.alpha2.ParameterAssignment"></a>
+<a name="api.v1.alpha2.ParameterAssignment"/>
 
 ### ParameterAssignment
 
@@ -672,7 +673,7 @@ List of ParameterSpec
 
 
 
-<a name="api.v1.alpha2.ParameterSpec"></a>
+<a name="api.v1.alpha2.ParameterSpec"/>
 
 ### ParameterSpec
 Config for a Hyper parameter.
@@ -690,7 +691,22 @@ Katib will create each Hyper parameter from this config.
 
 
 
-<a name="api.v1.alpha2.RegisterExperimentReply"></a>
+<a name="api.v1.alpha2.PreCheckRegisterExperimentReply"/>
+
+### PreCheckRegisterExperimentReply
+
+
+
+| Field | Type | Label | Description |
+| ----- | ---- | ----- | ----------- |
+| can_register | [bool](#bool) |  |  |
+
+
+
+
+
+
+<a name="api.v1.alpha2.RegisterExperimentReply"/>
 
 ### RegisterExperimentReply
 
@@ -700,7 +716,7 @@ Katib will create each Hyper parameter from this config.
 
 
 
-<a name="api.v1.alpha2.RegisterExperimentRequest"></a>
+<a name="api.v1.alpha2.RegisterExperimentRequest"/>
 
 ### RegisterExperimentRequest
 
@@ -715,7 +731,7 @@ Katib will create each Hyper parameter from this config.
 
 
 
-<a name="api.v1.alpha2.RegisterTrialReply"></a>
+<a name="api.v1.alpha2.RegisterTrialReply"/>
 
 ### RegisterTrialReply
 
@@ -725,7 +741,7 @@ Katib will create each Hyper parameter from this config.
 
 
 
-<a name="api.v1.alpha2.RegisterTrialRequest"></a>
+<a name="api.v1.alpha2.RegisterTrialRequest"/>
 
 ### RegisterTrialRequest
 
@@ -740,7 +756,7 @@ Katib will create each Hyper parameter from this config.
 
 
 
-<a name="api.v1.alpha2.ReportObservationLogReply"></a>
+<a name="api.v1.alpha2.ReportObservationLogReply"/>
 
 ### ReportObservationLogReply
 
@@ -750,7 +766,7 @@ Katib will create each Hyper parameter from this config.
 
 
 
-<a name="api.v1.alpha2.ReportObservationLogRequest"></a>
+<a name="api.v1.alpha2.ReportObservationLogRequest"/>
 
 ### ReportObservationLogRequest
 
@@ -766,7 +782,7 @@ Katib will create each Hyper parameter from this config.
 
 
 
-<a name="api.v1.alpha2.Trial"></a>
+<a name="api.v1.alpha2.Trial"/>
 
 ### Trial
 
@@ -783,7 +799,7 @@ Katib will create each Hyper parameter from this config.
 
 
 
-<a name="api.v1.alpha2.TrialSpec"></a>
+<a name="api.v1.alpha2.TrialSpec"/>
 
 ### TrialSpec
 
@@ -802,7 +818,7 @@ Katib will create each Hyper parameter from this config.
 
 
 
-<a name="api.v1.alpha2.TrialSpec.ParameterAssignments"></a>
+<a name="api.v1.alpha2.TrialSpec.ParameterAssignments"/>
 
 ### TrialSpec.ParameterAssignments
 List of ParameterAssignment
@@ -817,7 +833,7 @@ List of ParameterAssignment
 
 
 
-<a name="api.v1.alpha2.TrialStatus"></a>
+<a name="api.v1.alpha2.TrialStatus"/>
 
 ### TrialStatus
 
@@ -835,7 +851,7 @@ List of ParameterAssignment
 
 
 
-<a name="api.v1.alpha2.UpdateAlgorithmExtraSettingsReply"></a>
+<a name="api.v1.alpha2.UpdateAlgorithmExtraSettingsReply"/>
 
 ### UpdateAlgorithmExtraSettingsReply
 
@@ -845,7 +861,7 @@ List of ParameterAssignment
 
 
 
-<a name="api.v1.alpha2.UpdateAlgorithmExtraSettingsRequest"></a>
+<a name="api.v1.alpha2.UpdateAlgorithmExtraSettingsRequest"/>
 
 ### UpdateAlgorithmExtraSettingsRequest
 
@@ -861,7 +877,7 @@ List of ParameterAssignment
 
 
 
-<a name="api.v1.alpha2.UpdateExperimentStatusReply"></a>
+<a name="api.v1.alpha2.UpdateExperimentStatusReply"/>
 
 ### UpdateExperimentStatusReply
 
@@ -871,7 +887,7 @@ List of ParameterAssignment
 
 
 
-<a name="api.v1.alpha2.UpdateExperimentStatusRequest"></a>
+<a name="api.v1.alpha2.UpdateExperimentStatusRequest"/>
 
 ### UpdateExperimentStatusRequest
 
@@ -887,7 +903,7 @@ List of ParameterAssignment
 
 
 
-<a name="api.v1.alpha2.UpdateTrialStatusReply"></a>
+<a name="api.v1.alpha2.UpdateTrialStatusReply"/>
 
 ### UpdateTrialStatusReply
 
@@ -897,7 +913,7 @@ List of ParameterAssignment
 
 
 
-<a name="api.v1.alpha2.UpdateTrialStatusRequest"></a>
+<a name="api.v1.alpha2.UpdateTrialStatusRequest"/>
 
 ### UpdateTrialStatusRequest
 
@@ -913,7 +929,7 @@ List of ParameterAssignment
 
 
 
-<a name="api.v1.alpha2.ValidateAlgorithmSettingsReply"></a>
+<a name="api.v1.alpha2.ValidateAlgorithmSettingsReply"/>
 
 ### ValidateAlgorithmSettingsReply
 Return INVALID_ARGUMENT Error if Algorithm Settings are not Valid
@@ -923,7 +939,7 @@ Return INVALID_ARGUMENT Error if Algorithm Settings are not Valid
 
 
 
-<a name="api.v1.alpha2.ValidateAlgorithmSettingsRequest"></a>
+<a name="api.v1.alpha2.ValidateAlgorithmSettingsRequest"/>
 
 ### ValidateAlgorithmSettingsRequest
 
@@ -941,7 +957,7 @@ Return INVALID_ARGUMENT Error if Algorithm Settings are not Valid
  
 
 
-<a name="api.v1.alpha2.ExperimentStatus.ExperimentConditionType"></a>
+<a name="api.v1.alpha2.ExperimentStatus.ExperimentConditionType"/>
 
 ### ExperimentStatus.ExperimentConditionType
 
@@ -957,7 +973,7 @@ Return INVALID_ARGUMENT Error if Algorithm Settings are not Valid
 
 
 
-<a name="api.v1.alpha2.ObjectiveType"></a>
+<a name="api.v1.alpha2.ObjectiveType"/>
 
 ### ObjectiveType
 Direction of optimization. Minimize or Maximize.
@@ -970,7 +986,7 @@ Direction of optimization. Minimize or Maximize.
 
 
 
-<a name="api.v1.alpha2.ParameterType"></a>
+<a name="api.v1.alpha2.ParameterType"/>
 
 ### ParameterType
 Types of value for HyperParameter.
@@ -985,7 +1001,7 @@ Types of value for HyperParameter.
 
 
 
-<a name="api.v1.alpha2.TrialStatus.TrialConditionType"></a>
+<a name="api.v1.alpha2.TrialStatus.TrialConditionType"/>
 
 ### TrialStatus.TrialConditionType
 
@@ -1005,7 +1021,7 @@ Types of value for HyperParameter.
  
 
 
-<a name="api.v1.alpha2.EarlyStopping"></a>
+<a name="api.v1.alpha2.EarlyStopping"/>
 
 ### EarlyStopping
 TODO
@@ -1014,7 +1030,7 @@ TODO
 | ----------- | ------------ | ------------- | ------------|
 
 
-<a name="api.v1.alpha2.Manager"></a>
+<a name="api.v1.alpha2.Manager"/>
 
 ### Manager
 Service for Main API for Katib
@@ -1024,33 +1040,34 @@ https://cloud.google.com/service-infrastructure/docs/service-management/referenc
 
 | Method Name | Request Type | Response Type | Description |
 | ----------- | ------------ | ------------- | ------------|
-| RegisterExperiment | [RegisterExperimentRequest](#api.v1.alpha2.RegisterExperimentRequest) | [RegisterExperimentReply](#api.v1.alpha2.RegisterExperimentReply) | Register a Experiment to DB. |
-| DeleteExperiment | [DeleteExperimentRequest](#api.v1.alpha2.DeleteExperimentRequest) | [DeleteExperimentReply](#api.v1.alpha2.DeleteExperimentReply) | Delete a Experiment from DB by name. |
-| GetExperiment | [GetExperimentRequest](#api.v1.alpha2.GetExperimentRequest) | [GetExperimentReply](#api.v1.alpha2.GetExperimentReply) | Get a Experiment from DB by name. |
-| GetExperimentList | [GetExperimentListRequest](#api.v1.alpha2.GetExperimentListRequest) | [GetExperimentListReply](#api.v1.alpha2.GetExperimentListReply) | Get a summary list of Experiment from DB. The summary includes name and condition. |
-| UpdateExperimentStatus | [UpdateExperimentStatusRequest](#api.v1.alpha2.UpdateExperimentStatusRequest) | [UpdateExperimentStatusReply](#api.v1.alpha2.UpdateExperimentStatusReply) | Update Status of a experiment. |
-| UpdateAlgorithmExtraSettings | [UpdateAlgorithmExtraSettingsRequest](#api.v1.alpha2.UpdateAlgorithmExtraSettingsRequest) | [UpdateAlgorithmExtraSettingsReply](#api.v1.alpha2.UpdateAlgorithmExtraSettingsReply) | Update AlgorithmExtraSettings. The ExtraSetting is created if it does not exist, otherwise it is overwrited. |
-| GetAlgorithmExtraSettings | [GetAlgorithmExtraSettingsRequest](#api.v1.alpha2.GetAlgorithmExtraSettingsRequest) | [GetAlgorithmExtraSettingsReply](#api.v1.alpha2.GetAlgorithmExtraSettingsReply) | Get all AlgorithmExtraSettings. |
-| RegisterTrial | [RegisterTrialRequest](#api.v1.alpha2.RegisterTrialRequest) | [RegisterTrialReply](#api.v1.alpha2.RegisterTrialReply) | Register a Trial to DB. ID will be filled by manager automatically. |
-| DeleteTrial | [DeleteTrialRequest](#api.v1.alpha2.DeleteTrialRequest) | [DeleteTrialReply](#api.v1.alpha2.DeleteTrialReply) | Delete a Trial from DB by ID. |
-| GetTrialList | [GetTrialListRequest](#api.v1.alpha2.GetTrialListRequest) | [GetTrialListReply](#api.v1.alpha2.GetTrialListReply) | Get a list of Trial from DB by name of a Experiment. |
-| GetTrial | [GetTrialRequest](#api.v1.alpha2.GetTrialRequest) | [GetTrialReply](#api.v1.alpha2.GetTrialReply) | Get a Trial from DB by ID of Trial. |
-| UpdateTrialStatus | [UpdateTrialStatusRequest](#api.v1.alpha2.UpdateTrialStatusRequest) | [UpdateTrialStatusReply](#api.v1.alpha2.UpdateTrialStatusReply) | Update Status of a trial. |
-| ReportObservationLog | [ReportObservationLogRequest](#api.v1.alpha2.ReportObservationLogRequest) | [ReportObservationLogReply](#api.v1.alpha2.ReportObservationLogReply) | Report a log of Observations for a Trial. The log consists of timestamp and value of metric. Katib store every log of metrics. You can see accuracy curve or other metric logs on UI. |
-| GetObservationLog | [GetObservationLogRequest](#api.v1.alpha2.GetObservationLogRequest) | [GetObservationLogReply](#api.v1.alpha2.GetObservationLogReply) | Get all log of Observations for a Trial. |
-| GetSuggestions | [GetSuggestionsRequest](#api.v1.alpha2.GetSuggestionsRequest) | [GetSuggestionsReply](#api.v1.alpha2.GetSuggestionsReply) | Get Suggestions from a Suggestion service. |
-| ValidateAlgorithmSettings | [ValidateAlgorithmSettingsRequest](#api.v1.alpha2.ValidateAlgorithmSettingsRequest) | [ValidateAlgorithmSettingsReply](#api.v1.alpha2.ValidateAlgorithmSettingsReply) | Validate AlgorithmSettings in an Experiment. Suggestion service should return INVALID_ARGUMENT Error when the parameter is invalid |
-
-
-<a name="api.v1.alpha2.Suggestion"></a>
+| RegisterExperiment | [RegisterExperimentRequest](#api.v1.alpha2.RegisterExperimentRequest) | [RegisterExperimentReply](#api.v1.alpha2.RegisterExperimentRequest) | Register a Experiment to DB. |
+| PreCheckRegisterExperiment | [RegisterExperimentRequest](#api.v1.alpha2.RegisterExperimentRequest) | [PreCheckRegisterExperimentReply](#api.v1.alpha2.RegisterExperimentRequest) | PreCheck to register a Experiment to DB. |
+| DeleteExperiment | [DeleteExperimentRequest](#api.v1.alpha2.DeleteExperimentRequest) | [DeleteExperimentReply](#api.v1.alpha2.DeleteExperimentRequest) | Delete a Experiment from DB by name. |
+| GetExperiment | [GetExperimentRequest](#api.v1.alpha2.GetExperimentRequest) | [GetExperimentReply](#api.v1.alpha2.GetExperimentRequest) | Get a Experiment from DB by name. |
+| GetExperimentList | [GetExperimentListRequest](#api.v1.alpha2.GetExperimentListRequest) | [GetExperimentListReply](#api.v1.alpha2.GetExperimentListRequest) | Get a summary list of Experiment from DB. The summary includes name and condition. |
+| UpdateExperimentStatus | [UpdateExperimentStatusRequest](#api.v1.alpha2.UpdateExperimentStatusRequest) | [UpdateExperimentStatusReply](#api.v1.alpha2.UpdateExperimentStatusRequest) | Update Status of a experiment. |
+| UpdateAlgorithmExtraSettings | [UpdateAlgorithmExtraSettingsRequest](#api.v1.alpha2.UpdateAlgorithmExtraSettingsRequest) | [UpdateAlgorithmExtraSettingsReply](#api.v1.alpha2.UpdateAlgorithmExtraSettingsRequest) | Update AlgorithmExtraSettings. The ExtraSetting is created if it does not exist, otherwise it is overwrited. |
+| GetAlgorithmExtraSettings | [GetAlgorithmExtraSettingsRequest](#api.v1.alpha2.GetAlgorithmExtraSettingsRequest) | [GetAlgorithmExtraSettingsReply](#api.v1.alpha2.GetAlgorithmExtraSettingsRequest) | Get all AlgorithmExtraSettings. |
+| RegisterTrial | [RegisterTrialRequest](#api.v1.alpha2.RegisterTrialRequest) | [RegisterTrialReply](#api.v1.alpha2.RegisterTrialRequest) | Register a Trial to DB. ID will be filled by manager automatically. |
+| DeleteTrial | [DeleteTrialRequest](#api.v1.alpha2.DeleteTrialRequest) | [DeleteTrialReply](#api.v1.alpha2.DeleteTrialRequest) | Delete a Trial from DB by ID. |
+| GetTrialList | [GetTrialListRequest](#api.v1.alpha2.GetTrialListRequest) | [GetTrialListReply](#api.v1.alpha2.GetTrialListRequest) | Get a list of Trial from DB by name of a Experiment. |
+| GetTrial | [GetTrialRequest](#api.v1.alpha2.GetTrialRequest) | [GetTrialReply](#api.v1.alpha2.GetTrialRequest) | Get a Trial from DB by ID of Trial. |
+| UpdateTrialStatus | [UpdateTrialStatusRequest](#api.v1.alpha2.UpdateTrialStatusRequest) | [UpdateTrialStatusReply](#api.v1.alpha2.UpdateTrialStatusRequest) | Update Status of a trial. |
+| ReportObservationLog | [ReportObservationLogRequest](#api.v1.alpha2.ReportObservationLogRequest) | [ReportObservationLogReply](#api.v1.alpha2.ReportObservationLogRequest) | Report a log of Observations for a Trial. The log consists of timestamp and value of metric. Katib store every log of metrics. You can see accuracy curve or other metric logs on UI. |
+| GetObservationLog | [GetObservationLogRequest](#api.v1.alpha2.GetObservationLogRequest) | [GetObservationLogReply](#api.v1.alpha2.GetObservationLogRequest) | Get all log of Observations for a Trial. |
+| GetSuggestions | [GetSuggestionsRequest](#api.v1.alpha2.GetSuggestionsRequest) | [GetSuggestionsReply](#api.v1.alpha2.GetSuggestionsRequest) | Get Suggestions from a Suggestion service. |
+| ValidateAlgorithmSettings | [ValidateAlgorithmSettingsRequest](#api.v1.alpha2.ValidateAlgorithmSettingsRequest) | [ValidateAlgorithmSettingsReply](#api.v1.alpha2.ValidateAlgorithmSettingsRequest) | Validate AlgorithmSettings in an Experiment. Suggestion service should return INVALID_ARGUMENT Error when the parameter is invalid |
+
+
+<a name="api.v1.alpha2.Suggestion"/>
 
 ### Suggestion
 
 
 | Method Name | Request Type | Response Type | Description |
 | ----------- | ------------ | ------------- | ------------|
-| GetSuggestions | [GetSuggestionsRequest](#api.v1.alpha2.GetSuggestionsRequest) | [GetSuggestionsReply](#api.v1.alpha2.GetSuggestionsReply) |  |
-| ValidateAlgorithmSettings | [ValidateAlgorithmSettingsRequest](#api.v1.alpha2.ValidateAlgorithmSettingsRequest) | [ValidateAlgorithmSettingsReply](#api.v1.alpha2.ValidateAlgorithmSettingsReply) |  |
+| GetSuggestions | [GetSuggestionsRequest](#api.v1.alpha2.GetSuggestionsRequest) | [GetSuggestionsReply](#api.v1.alpha2.GetSuggestionsRequest) |  |
+| ValidateAlgorithmSettings | [ValidateAlgorithmSettingsRequest](#api.v1.alpha2.ValidateAlgorithmSettingsRequest) | [ValidateAlgorithmSettingsReply](#api.v1.alpha2.ValidateAlgorithmSettingsRequest) |  |
 
  
 
diff --git a/pkg/api/v1alpha2/gen-doc/index.html b/pkg/api/v1alpha2/gen-doc/index.html
index 9deb588f07c..219c2eb84af 100644
--- a/pkg/api/v1alpha2/gen-doc/index.html
+++ b/pkg/api/v1alpha2/gen-doc/index.html
@@ -4,7 +4,7 @@
   <head>
     <title>Protocol Documentation</title>
     <meta charset="UTF-8">
-    <link rel="stylesheet" type="text/css" href="https://fonts.googleapis.com/css?family=Ubuntu:400,700,400italic"/>
+    <link rel="stylesheet" type="text/css" href="http://fonts.googleapis.com/css?family=Ubuntu:400,700,400italic"/>
     <style>
       body {
         width: 60em;
@@ -334,6 +334,10 @@ <h2>Table of Contents</h2>
                   <a href="#api.v1.alpha2.ParameterSpec"><span class="badge">M</span>ParameterSpec</a>
                 </li>
               
+                <li>
+                  <a href="#api.v1.alpha2.PreCheckRegisterExperimentReply"><span class="badge">M</span>PreCheckRegisterExperimentReply</a>
+                </li>
+              
                 <li>
                   <a href="#api.v1.alpha2.RegisterExperimentReply"><span class="badge">M</span>RegisterExperimentReply</a>
                 </li>
@@ -478,8 +482,7 @@ <h3 id="api.v1.alpha2.AlgorithmSetting">AlgorithmSetting</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -516,8 +519,7 @@ <h3 id="api.v1.alpha2.AlgorithmSpec">AlgorithmSpec</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -547,8 +549,7 @@ <h3 id="api.v1.alpha2.DeleteExperimentRequest">DeleteExperimentRequest</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -578,8 +579,7 @@ <h3 id="api.v1.alpha2.DeleteTrialRequest">DeleteTrialRequest</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -623,8 +623,7 @@ <h3 id="api.v1.alpha2.Experiment">Experiment</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -696,8 +695,7 @@ <h3 id="api.v1.alpha2.ExperimentSpec">ExperimentSpec</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -720,8 +718,7 @@ <h3 id="api.v1.alpha2.ExperimentSpec.ParameterSpecs">ExperimentSpec.ParameterSpe
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -758,8 +755,7 @@ <h3 id="api.v1.alpha2.ExperimentStatus">ExperimentStatus</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -789,8 +785,7 @@ <h3 id="api.v1.alpha2.ExperimentSummary">ExperimentSummary</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -834,8 +829,7 @@ <h3 id="api.v1.alpha2.FeasibleSpace">FeasibleSpace</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -858,8 +852,7 @@ <h3 id="api.v1.alpha2.GetAlgorithmExtraSettingsReply">GetAlgorithmExtraSettingsR
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -882,8 +875,7 @@ <h3 id="api.v1.alpha2.GetAlgorithmExtraSettingsRequest">GetAlgorithmExtraSetting
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -906,8 +898,7 @@ <h3 id="api.v1.alpha2.GetExperimentListReply">GetExperimentListReply</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -937,8 +928,7 @@ <h3 id="api.v1.alpha2.GetExperimentReply">GetExperimentReply</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -961,8 +951,7 @@ <h3 id="api.v1.alpha2.GetExperimentRequest">GetExperimentRequest</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -985,8 +974,7 @@ <h3 id="api.v1.alpha2.GetObservationLogReply">GetObservationLogReply</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -1030,8 +1018,7 @@ <h3 id="api.v1.alpha2.GetObservationLogRequest">GetObservationLogRequest</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -1054,8 +1041,7 @@ <h3 id="api.v1.alpha2.GetSuggestionsReply">GetSuggestionsReply</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -1092,8 +1078,7 @@ <h3 id="api.v1.alpha2.GetSuggestionsRequest">GetSuggestionsRequest</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -1116,8 +1101,7 @@ <h3 id="api.v1.alpha2.GetTrialListReply">GetTrialListReply</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -1147,8 +1131,7 @@ <h3 id="api.v1.alpha2.GetTrialListRequest">GetTrialListRequest</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -1171,8 +1154,7 @@ <h3 id="api.v1.alpha2.GetTrialReply">GetTrialReply</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -1195,8 +1177,7 @@ <h3 id="api.v1.alpha2.GetTrialRequest">GetTrialRequest</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -1233,8 +1214,7 @@ <h3 id="api.v1.alpha2.GraphConfig">GraphConfig</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -1264,8 +1244,7 @@ <h3 id="api.v1.alpha2.Metric">Metric</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -1295,8 +1274,7 @@ <h3 id="api.v1.alpha2.MetricLog">MetricLog</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -1326,8 +1304,7 @@ <h3 id="api.v1.alpha2.NasConfig">NasConfig</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -1350,8 +1327,7 @@ <h3 id="api.v1.alpha2.NasConfig.Operations">NasConfig.Operations</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -1395,8 +1371,7 @@ <h3 id="api.v1.alpha2.ObjectiveSpec">ObjectiveSpec</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -1419,8 +1394,7 @@ <h3 id="api.v1.alpha2.Observation">Observation</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -1443,8 +1417,7 @@ <h3 id="api.v1.alpha2.ObservationLog">ObservationLog</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -1474,8 +1447,7 @@ <h3 id="api.v1.alpha2.Operation">Operation</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -1498,8 +1470,7 @@ <h3 id="api.v1.alpha2.Operation.ParameterSpecs">Operation.ParameterSpecs</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -1529,8 +1500,7 @@ <h3 id="api.v1.alpha2.ParameterAssignment">ParameterAssignment</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -1567,8 +1537,30 @@ <h3 id="api.v1.alpha2.ParameterSpec">ParameterSpec</h3>
               
             </tbody>
           </table>
+        
 
-          
+        
+      
+        <h3 id="api.v1.alpha2.PreCheckRegisterExperimentReply">PreCheckRegisterExperimentReply</h3>
+        <p></p>
+
+        
+          <table class="field-table">
+            <thead>
+              <tr><td>Field</td><td>Type</td><td>Label</td><td>Description</td></tr>
+            </thead>
+            <tbody>
+              
+                <tr>
+                  <td>can_register</td>
+                  <td><a href="#bool">bool</a></td>
+                  <td></td>
+                  <td><p> </p></td>
+                </tr>
+              
+            </tbody>
+          </table>
+        
 
         
       
@@ -1598,8 +1590,7 @@ <h3 id="api.v1.alpha2.RegisterExperimentRequest">RegisterExperimentRequest</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -1629,8 +1620,7 @@ <h3 id="api.v1.alpha2.RegisterTrialRequest">RegisterTrialRequest</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -1667,8 +1657,7 @@ <h3 id="api.v1.alpha2.ReportObservationLogRequest">ReportObservationLogRequest</
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -1705,8 +1694,7 @@ <h3 id="api.v1.alpha2.Trial">Trial</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -1757,8 +1745,7 @@ <h3 id="api.v1.alpha2.TrialSpec">TrialSpec</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -1781,8 +1768,7 @@ <h3 id="api.v1.alpha2.TrialSpec.ParameterAssignments">TrialSpec.ParameterAssignm
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -1826,8 +1812,7 @@ <h3 id="api.v1.alpha2.TrialStatus">TrialStatus</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -1864,8 +1849,7 @@ <h3 id="api.v1.alpha2.UpdateAlgorithmExtraSettingsRequest">UpdateAlgorithmExtraS
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -1902,8 +1886,7 @@ <h3 id="api.v1.alpha2.UpdateExperimentStatusRequest">UpdateExperimentStatusReque
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -1940,8 +1923,7 @@ <h3 id="api.v1.alpha2.UpdateTrialStatusRequest">UpdateTrialStatusRequest</h3>
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -1978,8 +1960,7 @@ <h3 id="api.v1.alpha2.ValidateAlgorithmSettingsRequest">ValidateAlgorithmSetting
               
             </tbody>
           </table>
-
-          
+        
 
         
       
@@ -2163,8 +2144,7 @@ <h3 id="api.v1.alpha2.EarlyStopping">EarlyStopping</h3>
             
           </tbody>
         </table>
-
-        
+      
         <h3 id="api.v1.alpha2.Manager">Manager</h3>
         <p>Service for Main API for Katib</p><p>For each RPC service, we define mapping to HTTP REST API method.</p><p>The mapping includes the URL path, query parameters and request body.</p><p>https://cloud.google.com/service-infrastructure/docs/service-management/reference/rpc/google.api#http</p>
         <table class="enum-table">
@@ -2180,6 +2160,13 @@ <h3 id="api.v1.alpha2.Manager">Manager</h3>
                 <td><p>Register a Experiment to DB.</p></td>
               </tr>
             
+              <tr>
+                <td>PreCheckRegisterExperiment</td>
+                <td><a href="#api.v1.alpha2.RegisterExperimentRequest">RegisterExperimentRequest</a></td>
+                <td><a href="#api.v1.alpha2.PreCheckRegisterExperimentReply">PreCheckRegisterExperimentReply</a></td>
+                <td><p>PreCheck to register a Experiment to DB.</p></td>
+              </tr>
+            
               <tr>
                 <td>DeleteExperiment</td>
                 <td><a href="#api.v1.alpha2.DeleteExperimentRequest">DeleteExperimentRequest</a></td>
@@ -2294,186 +2281,7 @@ <h3 id="api.v1.alpha2.Manager">Manager</h3>
             
           </tbody>
         </table>
-
-        
-          
-          
-          <h4>Methods with HTTP bindings</h4>
-          <table>
-            <thead>
-              <tr>
-                <td>Method Name</td>
-                <td>Method</td>
-                <td>Pattern</td>
-                <td>Body</td>
-              </tr>
-            </thead>
-            <tbody>
-            
-              
-              
-              <tr>
-                <td>RegisterExperiment</td>
-                <td>POST</td>
-                <td>/api/Manager/RegisterExperiment</td>
-                <td>experiment</td>
-              </tr>
-              
-            
-              
-              
-              <tr>
-                <td>DeleteExperiment</td>
-                <td>GET</td>
-                <td>/api/Manager/DeleteExperiment/{experiment_name}</td>
-                <td></td>
-              </tr>
-              
-            
-              
-              
-              <tr>
-                <td>GetExperiment</td>
-                <td>GET</td>
-                <td>/api/Manager/GetExperiment/{experiment_name}</td>
-                <td></td>
-              </tr>
-              
-            
-              
-              
-              <tr>
-                <td>GetExperimentList</td>
-                <td>GET</td>
-                <td>/api/Manager/GetExperimentList</td>
-                <td></td>
-              </tr>
-              
-            
-              
-              
-              <tr>
-                <td>UpdateExperimentStatus</td>
-                <td>PUT</td>
-                <td>/api/Manager/UpdateExperimentStatus/{experiment_name}</td>
-                <td>*</td>
-              </tr>
-              
-            
-              
-              
-              <tr>
-                <td>UpdateAlgorithmExtraSettings</td>
-                <td>PUT</td>
-                <td>/api/Manager/UpdateAlgorithmExtraSettings/{experiment_name}</td>
-                <td>*</td>
-              </tr>
-              
-            
-              
-              
-              <tr>
-                <td>GetAlgorithmExtraSettings</td>
-                <td>GET</td>
-                <td>/api/Manager/GetAlgorithmExtraSettings/{experiment_name}</td>
-                <td></td>
-              </tr>
-              
-            
-              
-              
-              <tr>
-                <td>RegisterTrial</td>
-                <td>POST</td>
-                <td>/api/Manager/RegisterTrial</td>
-                <td>trial</td>
-              </tr>
-              
-            
-              
-              
-              <tr>
-                <td>DeleteTrial</td>
-                <td>GET</td>
-                <td>/api/Manager/DeleteTrial/{trial_name}</td>
-                <td></td>
-              </tr>
-              
-            
-              
-              
-              <tr>
-                <td>GetTrialList</td>
-                <td>GET</td>
-                <td>/api/Manager/GetTrialList/{experiment_name}</td>
-                <td></td>
-              </tr>
-              
-            
-              
-              
-              <tr>
-                <td>GetTrial</td>
-                <td>GET</td>
-                <td>/api/Manager/GetTrial/{trial_name}</td>
-                <td></td>
-              </tr>
-              
-            
-              
-              
-              <tr>
-                <td>UpdateTrialStatus</td>
-                <td>PUT</td>
-                <td>/api/Manager/UpdateTrialStatus</td>
-                <td>*</td>
-              </tr>
-              
-            
-              
-              
-              <tr>
-                <td>ReportObservationLog</td>
-                <td>POST</td>
-                <td>/api/Manager/ReportObservationLog</td>
-                <td>*</td>
-              </tr>
-              
-            
-              
-              
-              <tr>
-                <td>GetObservationLog</td>
-                <td>POST</td>
-                <td>/api/Manager/GetObservationLog</td>
-                <td>*</td>
-              </tr>
-              
-            
-              
-              
-              <tr>
-                <td>GetSuggestions</td>
-                <td>POST</td>
-                <td>/api/Manager/GetSuggestions</td>
-                <td>*</td>
-              </tr>
-              
-            
-              
-              
-              <tr>
-                <td>ValidateAlgorithmSettings</td>
-                <td>POST</td>
-                <td>/api/Manager/ValidateAlgorithmSettings</td>
-                <td>*</td>
-              </tr>
-              
-            
-            </tbody>
-          </table>
-          
-        
+      
         <h3 id="api.v1.alpha2.Suggestion">Suggestion</h3>
         <p></p>
         <table class="enum-table">
@@ -2498,8 +2306,7 @@ <h3 id="api.v1.alpha2.Suggestion">Suggestion</h3>
             
           </tbody>
         </table>
-
-        
+      
     
 
     <h2 id="scalar-value-types">Scalar Value Types</h2>
diff --git a/pkg/api/v1alpha2/python/api_pb2.py b/pkg/api/v1alpha2/python/api_pb2.py
index 230eab0bc02..77970b97be8 100644
--- a/pkg/api/v1alpha2/python/api_pb2.py
+++ b/pkg/api/v1alpha2/python/api_pb2.py
@@ -21,7 +21,7 @@
   name='api.proto',
   package='api.v1.alpha2',
   syntax='proto3',
-  serialized_pb=_b('\n\tapi.proto\x12\rapi.v1.alpha2\x1a\x1cgoogle/api/annotations.proto\"E\n\rFeasibleSpace\x12\x0b\n\x03max\x18\x01 \x01(\t\x12\x0b\n\x03min\x18\x02 \x01(\t\x12\x0c\n\x04list\x18\x03 \x03(\t\x12\x0c\n\x04step\x18\x04 \x01(\t\"\x89\x01\n\rParameterSpec\x12\x0c\n\x04name\x18\x01 \x01(\t\x12\x34\n\x0eparameter_type\x18\x02 \x01(\x0e\x32\x1c.api.v1.alpha2.ParameterType\x12\x34\n\x0e\x66\x65\x61sible_space\x18\x03 \x01(\x0b\x32\x1c.api.v1.alpha2.FeasibleSpace\"\x89\x01\n\rObjectiveSpec\x12*\n\x04type\x18\x01 \x01(\x0e\x32\x1c.api.v1.alpha2.ObjectiveType\x12\x0c\n\x04goal\x18\x02 \x01(\x02\x12\x1d\n\x15objective_metric_name\x18\x03 \x01(\t\x12\x1f\n\x17\x61\x64\x64itional_metric_names\x18\x04 \x03(\t\"/\n\x10\x41lgorithmSetting\x12\x0c\n\x04name\x18\x01 \x01(\t\x12\r\n\x05value\x18\x02 \x01(\t\"\x13\n\x11\x45\x61rlyStoppingSpec\"\xa2\x01\n\rAlgorithmSpec\x12\x16\n\x0e\x61lgorithm_name\x18\x01 \x01(\t\x12:\n\x11\x61lgorithm_setting\x18\x02 \x03(\x0b\x32\x1f.api.v1.alpha2.AlgorithmSetting\x12=\n\x13\x65\x61rly_stopping_spec\x18\x03 \x01(\x0b\x32 .api.v1.alpha2.EarlyStoppingSpec\"\xb1\x01\n\tNasConfig\x12\x30\n\x0cgraph_config\x18\x01 \x01(\x0b\x32\x1a.api.v1.alpha2.GraphConfig\x12\x37\n\noperations\x18\x02 \x01(\x0b\x32#.api.v1.alpha2.NasConfig.Operations\x1a\x39\n\nOperations\x12+\n\toperation\x18\x01 \x03(\x0b\x32\x18.api.v1.alpha2.Operation\"L\n\x0bGraphConfig\x12\x12\n\nnum_layers\x18\x01 \x01(\x05\x12\x13\n\x0binput_sizes\x18\x02 \x03(\x05\x12\x14\n\x0coutput_sizes\x18\x03 \x03(\x05\"\xa9\x01\n\tOperation\x12\x16\n\x0eoperation_type\x18\x01 \x01(\t\x12@\n\x0fparameter_specs\x18\x02 \x01(\x0b\x32\'.api.v1.alpha2.Operation.ParameterSpecs\x1a\x42\n\x0eParameterSpecs\x12\x30\n\nparameters\x18\x01 \x03(\x0b\x32\x1c.api.v1.alpha2.ParameterSpec\"\x9a\x03\n\x0e\x45xperimentSpec\x12\x45\n\x0fparameter_specs\x18\x01 \x01(\x0b\x32,.api.v1.alpha2.ExperimentSpec.ParameterSpecs\x12/\n\tobjective\x18\x02 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   ,
   dependencies=[google_dot_api_dot_annotations__pb2.DESCRIPTOR,])
 
@@ -54,8 +54,8 @@
   ],
   containing_type=None,
   options=None,
-  serialized_start=4924,
-  serialized_end=5009,
+  serialized_start=4981,
+  serialized_end=5066,
 )
 _sym_db.RegisterEnumDescriptor(_PARAMETERTYPE)
 
@@ -81,8 +81,8 @@
   ],
   containing_type=None,
   options=None,
-  serialized_start=5011,
-  serialized_end=5067,
+  serialized_start=5068,
+  serialized_end=5124,
 )
 _sym_db.RegisterEnumDescriptor(_OBJECTIVETYPE)
 
@@ -1230,6 +1230,37 @@
 )
 
 
+_PRECHECKREGISTEREXPERIMENTREPLY = _descriptor.Descriptor(
+  name='PreCheckRegisterExperimentReply',
+  full_name='api.v1.alpha2.PreCheckRegisterExperimentReply',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='can_register', full_name='api.v1.alpha2.PreCheckRegisterExperimentReply.can_register', index=0,
+      number=1, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2926,
+  serialized_end=2981,
+)
+
+
 _DELETEEXPERIMENTREQUEST = _descriptor.Descriptor(
   name='DeleteExperimentRequest',
   full_name='api.v1.alpha2.DeleteExperimentRequest',
@@ -1256,8 +1287,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=2926,
-  serialized_end=2976,
+  serialized_start=2983,
+  serialized_end=3033,
 )
 
 
@@ -1280,8 +1311,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=2978,
-  serialized_end=3001,
+  serialized_start=3035,
+  serialized_end=3058,
 )
 
 
@@ -1311,8 +1342,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=3003,
-  serialized_end=3050,
+  serialized_start=3060,
+  serialized_end=3107,
 )
 
 
@@ -1342,8 +1373,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=3052,
-  serialized_end=3119,
+  serialized_start=3109,
+  serialized_end=3176,
 )
 
 
@@ -1380,8 +1411,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=3121,
-  serialized_end=3214,
+  serialized_start=3178,
+  serialized_end=3271,
 )
 
 
@@ -1404,8 +1435,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=3216,
-  serialized_end=3242,
+  serialized_start=3273,
+  serialized_end=3299,
 )
 
 
@@ -1435,8 +1466,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=3244,
-  serialized_end=3332,
+  serialized_start=3301,
+  serialized_end=3389,
 )
 
 
@@ -1473,8 +1504,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=3334,
-  serialized_end=3443,
+  serialized_start=3391,
+  serialized_end=3500,
 )
 
 
@@ -1497,8 +1528,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=3445,
-  serialized_end=3474,
+  serialized_start=3502,
+  serialized_end=3531,
 )
 
 
@@ -1535,8 +1566,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=3477,
-  serialized_end=3606,
+  serialized_start=3534,
+  serialized_end=3663,
 )
 
 
@@ -1559,8 +1590,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=3608,
-  serialized_end=3643,
+  serialized_start=3665,
+  serialized_end=3700,
 )
 
 
@@ -1590,8 +1621,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=3645,
-  serialized_end=3704,
+  serialized_start=3702,
+  serialized_end=3761,
 )
 
 
@@ -1621,8 +1652,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=3706,
-  serialized_end=3805,
+  serialized_start=3763,
+  serialized_end=3862,
 )
 
 
@@ -1652,8 +1683,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=3807,
-  serialized_end=3866,
+  serialized_start=3864,
+  serialized_end=3923,
 )
 
 
@@ -1676,8 +1707,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=3868,
-  serialized_end=3888,
+  serialized_start=3925,
+  serialized_end=3945,
 )
 
 
@@ -1707,8 +1738,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=3890,
-  serialized_end=3930,
+  serialized_start=3947,
+  serialized_end=3987,
 )
 
 
@@ -1731,8 +1762,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=3932,
-  serialized_end=3950,
+  serialized_start=3989,
+  serialized_end=4007,
 )
 
 
@@ -1769,8 +1800,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=3952,
-  serialized_end=4014,
+  serialized_start=4009,
+  serialized_end=4071,
 )
 
 
@@ -1800,8 +1831,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=4016,
-  serialized_end=4073,
+  serialized_start=4073,
+  serialized_end=4130,
 )
 
 
@@ -1831,8 +1862,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=4075,
-  serialized_end=4112,
+  serialized_start=4132,
+  serialized_end=4169,
 )
 
 
@@ -1862,8 +1893,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=4114,
-  serialized_end=4166,
+  serialized_start=4171,
+  serialized_end=4223,
 )
 
 
@@ -1900,8 +1931,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=4168,
-  serialized_end=4262,
+  serialized_start=4225,
+  serialized_end=4319,
 )
 
 
@@ -1924,8 +1955,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=4264,
-  serialized_end=4288,
+  serialized_start=4321,
+  serialized_end=4345,
 )
 
 
@@ -1962,8 +1993,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=4290,
-  serialized_end=4395,
+  serialized_start=4347,
+  serialized_end=4452,
 )
 
 
@@ -1986,8 +2017,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=4397,
-  serialized_end=4424,
+  serialized_start=4454,
+  serialized_end=4481,
 )
 
 
@@ -2038,8 +2069,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=4426,
-  serialized_end=4531,
+  serialized_start=4483,
+  serialized_end=4588,
 )
 
 
@@ -2069,8 +2100,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=4533,
-  serialized_end=4613,
+  serialized_start=4590,
+  serialized_end=4670,
 )
 
 
@@ -2114,8 +2145,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=4615,
-  serialized_end=4711,
+  serialized_start=4672,
+  serialized_end=4768,
 )
 
 
@@ -2145,8 +2176,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=4713,
-  serialized_end=4772,
+  serialized_start=4770,
+  serialized_end=4829,
 )
 
 
@@ -2183,8 +2214,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=4774,
-  serialized_end=4888,
+  serialized_start=4831,
+  serialized_end=4945,
 )
 
 
@@ -2207,8 +2238,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=4890,
-  serialized_end=4922,
+  serialized_start=4947,
+  serialized_end=4979,
 )
 
 _PARAMETERSPEC.fields_by_name['parameter_type'].enum_type = _PARAMETERTYPE
@@ -2282,6 +2313,7 @@
 DESCRIPTOR.message_types_by_name['Trial'] = _TRIAL
 DESCRIPTOR.message_types_by_name['RegisterExperimentRequest'] = _REGISTEREXPERIMENTREQUEST
 DESCRIPTOR.message_types_by_name['RegisterExperimentReply'] = _REGISTEREXPERIMENTREPLY
+DESCRIPTOR.message_types_by_name['PreCheckRegisterExperimentReply'] = _PRECHECKREGISTEREXPERIMENTREPLY
 DESCRIPTOR.message_types_by_name['DeleteExperimentRequest'] = _DELETEEXPERIMENTREQUEST
 DESCRIPTOR.message_types_by_name['DeleteExperimentReply'] = _DELETEEXPERIMENTREPLY
 DESCRIPTOR.message_types_by_name['GetExperimentRequest'] = _GETEXPERIMENTREQUEST
@@ -2503,6 +2535,13 @@
   ))
 _sym_db.RegisterMessage(RegisterExperimentReply)
 
+PreCheckRegisterExperimentReply = _reflection.GeneratedProtocolMessageType('PreCheckRegisterExperimentReply', (_message.Message,), dict(
+  DESCRIPTOR = _PRECHECKREGISTEREXPERIMENTREPLY,
+  __module__ = 'api_pb2'
+  # @@protoc_insertion_point(class_scope:api.v1.alpha2.PreCheckRegisterExperimentReply)
+  ))
+_sym_db.RegisterMessage(PreCheckRegisterExperimentReply)
+
 DeleteExperimentRequest = _reflection.GeneratedProtocolMessageType('DeleteExperimentRequest', (_message.Message,), dict(
   DESCRIPTOR = _DELETEEXPERIMENTREQUEST,
   __module__ = 'api_pb2'
@@ -2728,8 +2767,8 @@
   file=DESCRIPTOR,
   index=0,
   options=None,
-  serialized_start=5070,
-  serialized_end=7540,
+  serialized_start=5127,
+  serialized_end=7779,
   methods=[
   _descriptor.MethodDescriptor(
     name='RegisterExperiment',
@@ -2740,10 +2779,19 @@
     output_type=_REGISTEREXPERIMENTREPLY,
     options=_descriptor._ParseOptions(descriptor_pb2.MethodOptions(), _b('\202\323\344\223\002-\"\037/api/Manager/RegisterExperiment:\nexperiment')),
   ),
+  _descriptor.MethodDescriptor(
+    name='PreCheckRegisterExperiment',
+    full_name='api.v1.alpha2.Manager.PreCheckRegisterExperiment',
+    index=1,
+    containing_service=None,
+    input_type=_REGISTEREXPERIMENTREQUEST,
+    output_type=_PRECHECKREGISTEREXPERIMENTREPLY,
+    options=_descriptor._ParseOptions(descriptor_pb2.MethodOptions(), _b('\202\323\344\223\0025\"\'/api/Manager/PreCheckRegisterExperiment:\nexperiment')),
+  ),
   _descriptor.MethodDescriptor(
     name='DeleteExperiment',
     full_name='api.v1.alpha2.Manager.DeleteExperiment',
-    index=1,
+    index=2,
     containing_service=None,
     input_type=_DELETEEXPERIMENTREQUEST,
     output_type=_DELETEEXPERIMENTREPLY,
@@ -2752,7 +2800,7 @@
   _descriptor.MethodDescriptor(
     name='GetExperiment',
     full_name='api.v1.alpha2.Manager.GetExperiment',
-    index=2,
+    index=3,
     containing_service=None,
     input_type=_GETEXPERIMENTREQUEST,
     output_type=_GETEXPERIMENTREPLY,
@@ -2761,7 +2809,7 @@
   _descriptor.MethodDescriptor(
     name='GetExperimentList',
     full_name='api.v1.alpha2.Manager.GetExperimentList',
-    index=3,
+    index=4,
     containing_service=None,
     input_type=_GETEXPERIMENTLISTREQUEST,
     output_type=_GETEXPERIMENTLISTREPLY,
@@ -2770,7 +2818,7 @@
   _descriptor.MethodDescriptor(
     name='UpdateExperimentStatus',
     full_name='api.v1.alpha2.Manager.UpdateExperimentStatus',
-    index=4,
+    index=5,
     containing_service=None,
     input_type=_UPDATEEXPERIMENTSTATUSREQUEST,
     output_type=_UPDATEEXPERIMENTSTATUSREPLY,
@@ -2779,7 +2827,7 @@
   _descriptor.MethodDescriptor(
     name='UpdateAlgorithmExtraSettings',
     full_name='api.v1.alpha2.Manager.UpdateAlgorithmExtraSettings',
-    index=5,
+    index=6,
     containing_service=None,
     input_type=_UPDATEALGORITHMEXTRASETTINGSREQUEST,
     output_type=_UPDATEALGORITHMEXTRASETTINGSREPLY,
@@ -2788,7 +2836,7 @@
   _descriptor.MethodDescriptor(
     name='GetAlgorithmExtraSettings',
     full_name='api.v1.alpha2.Manager.GetAlgorithmExtraSettings',
-    index=6,
+    index=7,
     containing_service=None,
     input_type=_GETALGORITHMEXTRASETTINGSREQUEST,
     output_type=_GETALGORITHMEXTRASETTINGSREPLY,
@@ -2797,7 +2845,7 @@
   _descriptor.MethodDescriptor(
     name='RegisterTrial',
     full_name='api.v1.alpha2.Manager.RegisterTrial',
-    index=7,
+    index=8,
     containing_service=None,
     input_type=_REGISTERTRIALREQUEST,
     output_type=_REGISTERTRIALREPLY,
@@ -2806,7 +2854,7 @@
   _descriptor.MethodDescriptor(
     name='DeleteTrial',
     full_name='api.v1.alpha2.Manager.DeleteTrial',
-    index=8,
+    index=9,
     containing_service=None,
     input_type=_DELETETRIALREQUEST,
     output_type=_DELETETRIALREPLY,
@@ -2815,7 +2863,7 @@
   _descriptor.MethodDescriptor(
     name='GetTrialList',
     full_name='api.v1.alpha2.Manager.GetTrialList',
-    index=9,
+    index=10,
     containing_service=None,
     input_type=_GETTRIALLISTREQUEST,
     output_type=_GETTRIALLISTREPLY,
@@ -2824,7 +2872,7 @@
   _descriptor.MethodDescriptor(
     name='GetTrial',
     full_name='api.v1.alpha2.Manager.GetTrial',
-    index=10,
+    index=11,
     containing_service=None,
     input_type=_GETTRIALREQUEST,
     output_type=_GETTRIALREPLY,
@@ -2833,7 +2881,7 @@
   _descriptor.MethodDescriptor(
     name='UpdateTrialStatus',
     full_name='api.v1.alpha2.Manager.UpdateTrialStatus',
-    index=11,
+    index=12,
     containing_service=None,
     input_type=_UPDATETRIALSTATUSREQUEST,
     output_type=_UPDATETRIALSTATUSREPLY,
@@ -2842,7 +2890,7 @@
   _descriptor.MethodDescriptor(
     name='ReportObservationLog',
     full_name='api.v1.alpha2.Manager.ReportObservationLog',
-    index=12,
+    index=13,
     containing_service=None,
     input_type=_REPORTOBSERVATIONLOGREQUEST,
     output_type=_REPORTOBSERVATIONLOGREPLY,
@@ -2851,7 +2899,7 @@
   _descriptor.MethodDescriptor(
     name='GetObservationLog',
     full_name='api.v1.alpha2.Manager.GetObservationLog',
-    index=13,
+    index=14,
     containing_service=None,
     input_type=_GETOBSERVATIONLOGREQUEST,
     output_type=_GETOBSERVATIONLOGREPLY,
@@ -2860,7 +2908,7 @@
   _descriptor.MethodDescriptor(
     name='GetSuggestions',
     full_name='api.v1.alpha2.Manager.GetSuggestions',
-    index=14,
+    index=15,
     containing_service=None,
     input_type=_GETSUGGESTIONSREQUEST,
     output_type=_GETSUGGESTIONSREPLY,
@@ -2869,7 +2917,7 @@
   _descriptor.MethodDescriptor(
     name='ValidateAlgorithmSettings',
     full_name='api.v1.alpha2.Manager.ValidateAlgorithmSettings',
-    index=15,
+    index=16,
     containing_service=None,
     input_type=_VALIDATEALGORITHMSETTINGSREQUEST,
     output_type=_VALIDATEALGORITHMSETTINGSREPLY,
@@ -2887,8 +2935,8 @@
   file=DESCRIPTOR,
   index=1,
   options=None,
-  serialized_start=7543,
-  serialized_end=7772,
+  serialized_start=7782,
+  serialized_end=8011,
   methods=[
   _descriptor.MethodDescriptor(
     name='GetSuggestions',
@@ -2920,8 +2968,8 @@
   file=DESCRIPTOR,
   index=2,
   options=None,
-  serialized_start=7774,
-  serialized_end=7789,
+  serialized_start=8013,
+  serialized_end=8028,
   methods=[
 ])
 _sym_db.RegisterServiceDescriptor(_EARLYSTOPPING)
@@ -2957,6 +3005,11 @@ def __init__(self, channel):
           request_serializer=RegisterExperimentRequest.SerializeToString,
           response_deserializer=RegisterExperimentReply.FromString,
           )
+      self.PreCheckRegisterExperiment = channel.unary_unary(
+          '/api.v1.alpha2.Manager/PreCheckRegisterExperiment',
+          request_serializer=RegisterExperimentRequest.SerializeToString,
+          response_deserializer=PreCheckRegisterExperimentReply.FromString,
+          )
       self.DeleteExperiment = channel.unary_unary(
           '/api.v1.alpha2.Manager/DeleteExperiment',
           request_serializer=DeleteExperimentRequest.SerializeToString,
@@ -3050,6 +3103,14 @@ def RegisterExperiment(self, request, context):
       context.set_details('Method not implemented!')
       raise NotImplementedError('Method not implemented!')
 
+    def PreCheckRegisterExperiment(self, request, context):
+      """*
+      PreCheck to register a Experiment to DB.
+      """
+      context.set_code(grpc.StatusCode.UNIMPLEMENTED)
+      context.set_details('Method not implemented!')
+      raise NotImplementedError('Method not implemented!')
+
     def DeleteExperiment(self, request, context):
       """* 
       Delete a Experiment from DB by name.
@@ -3185,6 +3246,11 @@ def add_ManagerServicer_to_server(servicer, server):
             request_deserializer=RegisterExperimentRequest.FromString,
             response_serializer=RegisterExperimentReply.SerializeToString,
         ),
+        'PreCheckRegisterExperiment': grpc.unary_unary_rpc_method_handler(
+            servicer.PreCheckRegisterExperiment,
+            request_deserializer=RegisterExperimentRequest.FromString,
+            response_serializer=PreCheckRegisterExperimentReply.SerializeToString,
+        ),
         'DeleteExperiment': grpc.unary_unary_rpc_method_handler(
             servicer.DeleteExperiment,
             request_deserializer=DeleteExperimentRequest.FromString,
@@ -3367,6 +3433,11 @@ def RegisterExperiment(self, request, context):
       Register a Experiment to DB.
       """
       context.code(beta_interfaces.StatusCode.UNIMPLEMENTED)
+    def PreCheckRegisterExperiment(self, request, context):
+      """*
+      PreCheck to register a Experiment to DB.
+      """
+      context.code(beta_interfaces.StatusCode.UNIMPLEMENTED)
     def DeleteExperiment(self, request, context):
       """* 
       Delete a Experiment from DB by name.
@@ -3469,6 +3540,12 @@ def RegisterExperiment(self, request, timeout, metadata=None, with_call=False, p
       """
       raise NotImplementedError()
     RegisterExperiment.future = None
+    def PreCheckRegisterExperiment(self, request, timeout, metadata=None, with_call=False, protocol_options=None):
+      """*
+      PreCheck to register a Experiment to DB.
+      """
+      raise NotImplementedError()
+    PreCheckRegisterExperiment.future = None
     def DeleteExperiment(self, request, timeout, metadata=None, with_call=False, protocol_options=None):
       """* 
       Delete a Experiment from DB by name.
@@ -3584,6 +3661,7 @@ def beta_create_Manager_server(servicer, pool=None, pool_size=None, default_time
       ('api.v1.alpha2.Manager', 'GetSuggestions'): GetSuggestionsRequest.FromString,
       ('api.v1.alpha2.Manager', 'GetTrial'): GetTrialRequest.FromString,
       ('api.v1.alpha2.Manager', 'GetTrialList'): GetTrialListRequest.FromString,
+      ('api.v1.alpha2.Manager', 'PreCheckRegisterExperiment'): RegisterExperimentRequest.FromString,
       ('api.v1.alpha2.Manager', 'RegisterExperiment'): RegisterExperimentRequest.FromString,
       ('api.v1.alpha2.Manager', 'RegisterTrial'): RegisterTrialRequest.FromString,
       ('api.v1.alpha2.Manager', 'ReportObservationLog'): ReportObservationLogRequest.FromString,
@@ -3602,6 +3680,7 @@ def beta_create_Manager_server(servicer, pool=None, pool_size=None, default_time
       ('api.v1.alpha2.Manager', 'GetSuggestions'): GetSuggestionsReply.SerializeToString,
       ('api.v1.alpha2.Manager', 'GetTrial'): GetTrialReply.SerializeToString,
       ('api.v1.alpha2.Manager', 'GetTrialList'): GetTrialListReply.SerializeToString,
+      ('api.v1.alpha2.Manager', 'PreCheckRegisterExperiment'): PreCheckRegisterExperimentReply.SerializeToString,
       ('api.v1.alpha2.Manager', 'RegisterExperiment'): RegisterExperimentReply.SerializeToString,
       ('api.v1.alpha2.Manager', 'RegisterTrial'): RegisterTrialReply.SerializeToString,
       ('api.v1.alpha2.Manager', 'ReportObservationLog'): ReportObservationLogReply.SerializeToString,
@@ -3620,6 +3699,7 @@ def beta_create_Manager_server(servicer, pool=None, pool_size=None, default_time
       ('api.v1.alpha2.Manager', 'GetSuggestions'): face_utilities.unary_unary_inline(servicer.GetSuggestions),
       ('api.v1.alpha2.Manager', 'GetTrial'): face_utilities.unary_unary_inline(servicer.GetTrial),
       ('api.v1.alpha2.Manager', 'GetTrialList'): face_utilities.unary_unary_inline(servicer.GetTrialList),
+      ('api.v1.alpha2.Manager', 'PreCheckRegisterExperiment'): face_utilities.unary_unary_inline(servicer.PreCheckRegisterExperiment),
       ('api.v1.alpha2.Manager', 'RegisterExperiment'): face_utilities.unary_unary_inline(servicer.RegisterExperiment),
       ('api.v1.alpha2.Manager', 'RegisterTrial'): face_utilities.unary_unary_inline(servicer.RegisterTrial),
       ('api.v1.alpha2.Manager', 'ReportObservationLog'): face_utilities.unary_unary_inline(servicer.ReportObservationLog),
@@ -3648,6 +3728,7 @@ def beta_create_Manager_stub(channel, host=None, metadata_transformer=None, pool
       ('api.v1.alpha2.Manager', 'GetSuggestions'): GetSuggestionsRequest.SerializeToString,
       ('api.v1.alpha2.Manager', 'GetTrial'): GetTrialRequest.SerializeToString,
       ('api.v1.alpha2.Manager', 'GetTrialList'): GetTrialListRequest.SerializeToString,
+      ('api.v1.alpha2.Manager', 'PreCheckRegisterExperiment'): RegisterExperimentRequest.SerializeToString,
       ('api.v1.alpha2.Manager', 'RegisterExperiment'): RegisterExperimentRequest.SerializeToString,
       ('api.v1.alpha2.Manager', 'RegisterTrial'): RegisterTrialRequest.SerializeToString,
       ('api.v1.alpha2.Manager', 'ReportObservationLog'): ReportObservationLogRequest.SerializeToString,
@@ -3666,6 +3747,7 @@ def beta_create_Manager_stub(channel, host=None, metadata_transformer=None, pool
       ('api.v1.alpha2.Manager', 'GetSuggestions'): GetSuggestionsReply.FromString,
       ('api.v1.alpha2.Manager', 'GetTrial'): GetTrialReply.FromString,
       ('api.v1.alpha2.Manager', 'GetTrialList'): GetTrialListReply.FromString,
+      ('api.v1.alpha2.Manager', 'PreCheckRegisterExperiment'): PreCheckRegisterExperimentReply.FromString,
       ('api.v1.alpha2.Manager', 'RegisterExperiment'): RegisterExperimentReply.FromString,
       ('api.v1.alpha2.Manager', 'RegisterTrial'): RegisterTrialReply.FromString,
       ('api.v1.alpha2.Manager', 'ReportObservationLog'): ReportObservationLogReply.FromString,
@@ -3684,6 +3766,7 @@ def beta_create_Manager_stub(channel, host=None, metadata_transformer=None, pool
       'GetSuggestions': cardinality.Cardinality.UNARY_UNARY,
       'GetTrial': cardinality.Cardinality.UNARY_UNARY,
       'GetTrialList': cardinality.Cardinality.UNARY_UNARY,
+      'PreCheckRegisterExperiment': cardinality.Cardinality.UNARY_UNARY,
       'RegisterExperiment': cardinality.Cardinality.UNARY_UNARY,
       'RegisterTrial': cardinality.Cardinality.UNARY_UNARY,
       'ReportObservationLog': cardinality.Cardinality.UNARY_UNARY,
diff --git a/pkg/api/v1alpha2/python/api_pb2_grpc.py b/pkg/api/v1alpha2/python/api_pb2_grpc.py
index 7129574b3c9..ea61b19b29a 100644
--- a/pkg/api/v1alpha2/python/api_pb2_grpc.py
+++ b/pkg/api/v1alpha2/python/api_pb2_grpc.py
@@ -23,6 +23,11 @@ def __init__(self, channel):
         request_serializer=api__pb2.RegisterExperimentRequest.SerializeToString,
         response_deserializer=api__pb2.RegisterExperimentReply.FromString,
         )
+    self.PreCheckRegisterExperiment = channel.unary_unary(
+        '/api.v1.alpha2.Manager/PreCheckRegisterExperiment',
+        request_serializer=api__pb2.RegisterExperimentRequest.SerializeToString,
+        response_deserializer=api__pb2.PreCheckRegisterExperimentReply.FromString,
+        )
     self.DeleteExperiment = channel.unary_unary(
         '/api.v1.alpha2.Manager/DeleteExperiment',
         request_serializer=api__pb2.DeleteExperimentRequest.SerializeToString,
@@ -116,6 +121,14 @@ def RegisterExperiment(self, request, context):
     context.set_details('Method not implemented!')
     raise NotImplementedError('Method not implemented!')
 
+  def PreCheckRegisterExperiment(self, request, context):
+    """*
+    PreCheck to register a Experiment to DB.
+    """
+    context.set_code(grpc.StatusCode.UNIMPLEMENTED)
+    context.set_details('Method not implemented!')
+    raise NotImplementedError('Method not implemented!')
+
   def DeleteExperiment(self, request, context):
     """* 
     Delete a Experiment from DB by name.
@@ -251,6 +264,11 @@ def add_ManagerServicer_to_server(servicer, server):
           request_deserializer=api__pb2.RegisterExperimentRequest.FromString,
           response_serializer=api__pb2.RegisterExperimentReply.SerializeToString,
       ),
+      'PreCheckRegisterExperiment': grpc.unary_unary_rpc_method_handler(
+          servicer.PreCheckRegisterExperiment,
+          request_deserializer=api__pb2.RegisterExperimentRequest.FromString,
+          response_serializer=api__pb2.PreCheckRegisterExperimentReply.SerializeToString,
+      ),
       'DeleteExperiment': grpc.unary_unary_rpc_method_handler(
           servicer.DeleteExperiment,
           request_deserializer=api__pb2.DeleteExperimentRequest.FromString,
diff --git a/pkg/common/v1alpha2/katib_manager_util.go b/pkg/common/v1alpha2/katib_manager_util.go
index bba072e33a3..107a73f570e 100644
--- a/pkg/common/v1alpha2/katib_manager_util.go
+++ b/pkg/common/v1alpha2/katib_manager_util.go
@@ -136,6 +136,17 @@ func GetSuggestions(request *api_pb.GetSuggestionsRequest) (*api_pb.GetSuggestio
 	return kc.GetSuggestions(ctx, request)
 }
 
+func PreCheckRegisterExperiment(request *api_pb.RegisterExperimentRequest) (*api_pb.PreCheckRegisterExperimentReply, error) {
+	ctx := context.Background()
+        kcc, err := getKatibManagerClientAndConn()
+        if err != nil {
+                return nil, err
+        }
+        defer closeKatibManagerConnection(kcc)
+        kc := kcc.KatibManagerClient
+        return kc.PreCheckRegisterExperiment(ctx, request)
+}
+
 func GetObservationLog(request *api_pb.GetObservationLogRequest) (*api_pb.GetObservationLogReply, error) {
 	ctx := context.Background()
 	kcc, err := getKatibManagerClientAndConn()
diff --git a/pkg/controller/v1alpha2/experiment/managerclient/managerclient.go b/pkg/controller/v1alpha2/experiment/managerclient/managerclient.go
index 4af73c18a75..801f03f2911 100644
--- a/pkg/controller/v1alpha2/experiment/managerclient/managerclient.go
+++ b/pkg/controller/v1alpha2/experiment/managerclient/managerclient.go
@@ -1,8 +1,6 @@
 package managerclient
 
 import (
-	"database/sql"
-
 	commonapiv1alpha2 "github.com/kubeflow/katib/pkg/api/operators/apis/common/v1alpha2"
 	experimentsv1alpha2 "github.com/kubeflow/katib/pkg/api/operators/apis/experiment/v1alpha2"
 	api_pb "github.com/kubeflow/katib/pkg/api/v1alpha2"
@@ -15,8 +13,7 @@ type ManagerClient interface {
 	CreateExperimentInDB(instance *experimentsv1alpha2.Experiment) error
 	DeleteExperimentInDB(instance *experimentsv1alpha2.Experiment) error
 	UpdateExperimentStatusInDB(instance *experimentsv1alpha2.Experiment) error
-	GetExperimentFromDB(instance *experimentsv1alpha2.Experiment) (
-		*api_pb.GetExperimentReply, error)
+	PreCheckRegisterExperimentInDB(inst *experimentsv1alpha2.Experiment) (*api_pb.PreCheckRegisterExperimentReply, error)
 }
 
 // DefaultClient implements the Client interface.
@@ -65,8 +62,12 @@ func (d *DefaultClient) UpdateExperimentStatusInDB(instance *experimentsv1alpha2
 	return nil
 }
 
-func (d *DefaultClient) GetExperimentFromDB(instance *experimentsv1alpha2.Experiment) (*api_pb.GetExperimentReply, error) {
-	return nil, sql.ErrNoRows
+func (d *DefaultClient) PreCheckRegisterExperimentInDB(inst *experimentsv1alpha2.Experiment) (*api_pb.PreCheckRegisterExperimentReply, error) {
+	experiment := getExperimentConf(inst)
+	request := &api_pb.RegisterExperimentRequest{
+		Experiment: experiment,
+	}
+	return commonv1alpha2.PreCheckRegisterExperiment(request)
 }
 
 func getExperimentConf(instance *experimentsv1alpha2.Experiment) *api_pb.Experiment {
diff --git a/pkg/controller/v1alpha2/experiment/validator/validator.go b/pkg/controller/v1alpha2/experiment/validator/validator.go
index e011a29fcb4..d0b4d8bbde9 100644
--- a/pkg/controller/v1alpha2/experiment/validator/validator.go
+++ b/pkg/controller/v1alpha2/experiment/validator/validator.go
@@ -2,7 +2,6 @@ package validator
 
 import (
 	"bytes"
-	"database/sql"
 	"fmt"
 
 	batchv1beta "k8s.io/api/batch/v1beta1"
@@ -146,13 +145,13 @@ func (g *DefaultValidator) validateSupportedJob(job *unstructured.Unstructured)
 }
 
 func (g *DefaultValidator) validateForCreate(inst *experimentsv1alpha2.Experiment) error {
-	if _, err := g.GetExperimentFromDB(inst); err != nil {
-		if err != sql.ErrNoRows {
-			return fmt.Errorf("Fail to check record for the experiment in DB: %v", err)
-		}
-		return nil
-	} else {
+	reply, err := g.PreCheckRegisterExperimentInDB(inst)
+	if err != nil {
+		return fmt.Errorf("Fail to check record for the experiment in DB: %v", err)
+	} else if !reply.CanRegister {
 		return fmt.Errorf("Record for the experiment has existed in DB; Please try to rename the experiment")
+	} else {
+		return nil
 	}
 }
 
diff --git a/pkg/controller/v1alpha2/experiment/validator/validator_test.go b/pkg/controller/v1alpha2/experiment/validator/validator_test.go
index dec12cd32fb..c7c53a27ef5 100644
--- a/pkg/controller/v1alpha2/experiment/validator/validator_test.go
+++ b/pkg/controller/v1alpha2/experiment/validator/validator_test.go
@@ -1,7 +1,6 @@
 package validator
 
 import (
-	"database/sql"
 	"testing"
 
 	"github.com/golang/mock/gomock"
@@ -10,6 +9,7 @@ import (
 
 	commonv1alpha2 "github.com/kubeflow/katib/pkg/api/operators/apis/common/v1alpha2"
 	experimentsv1alpha2 "github.com/kubeflow/katib/pkg/api/operators/apis/experiment/v1alpha2"
+	api_pb "github.com/kubeflow/katib/pkg/api/v1alpha2"
 	managerclientmock "github.com/kubeflow/katib/pkg/mock/v1alpha2/experiment/managerclient"
 	manifestmock "github.com/kubeflow/katib/pkg/mock/v1alpha2/experiment/manifest"
 )
@@ -42,7 +42,10 @@ spec:
 	g := New(p, mc)
 
 	p.EXPECT().GetRunSpec(gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any()).Return(trialTFJobTemplate, nil)
-	mc.EXPECT().GetExperimentFromDB(gomock.Any()).Return(nil, sql.ErrNoRows).AnyTimes()
+	mc.EXPECT().PreCheckRegisterExperimentInDB(gomock.Any()).Return(
+		&api_pb.PreCheckRegisterExperimentReply{
+			CanRegister: true,
+		}, nil).AnyTimes()
 
 	instance := newFakeInstance()
 	if err := g.(*DefaultValidator).validateTrialTemplate(instance); err == nil {
@@ -67,7 +70,10 @@ metadata:
 	g := New(p, mc)
 
 	p.EXPECT().GetRunSpec(gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any()).Return(trialJobTemplate, nil)
-	mc.EXPECT().GetExperimentFromDB(gomock.Any()).Return(nil, sql.ErrNoRows).AnyTimes()
+	mc.EXPECT().PreCheckRegisterExperimentInDB(gomock.Any()).Return(
+		&api_pb.PreCheckRegisterExperimentReply{
+			CanRegister: true,
+		}, nil).AnyTimes()
 
 	instance := newFakeInstance()
 	if err := g.(*DefaultValidator).validateTrialTemplate(instance); err != nil {
@@ -104,7 +110,10 @@ spec:
 		gomock.Any(), gomock.Any(), gomock.Any(),
 		gomock.Any(), gomock.Any(), gomock.Any()).
 		Return(metricsCollectorTemplate, nil).AnyTimes()
-	mc.EXPECT().GetExperimentFromDB(gomock.Any()).Return(nil, sql.ErrNoRows).AnyTimes()
+	mc.EXPECT().PreCheckRegisterExperimentInDB(gomock.Any()).Return(
+		&api_pb.PreCheckRegisterExperimentReply{
+			CanRegister: true,
+		}, nil).AnyTimes()
 
 	tcs := []struct {
 		Instance *experimentsv1alpha2.Experiment
diff --git a/pkg/db/v1alpha2/interface.go b/pkg/db/v1alpha2/interface.go
index 63add7f476b..5b8fc5bca4e 100644
--- a/pkg/db/v1alpha2/interface.go
+++ b/pkg/db/v1alpha2/interface.go
@@ -44,6 +44,7 @@ type KatibDBInterface interface {
 	SelectOne() error
 
 	RegisterExperiment(experiment *v1alpha2.Experiment) error
+	PreCheckRegisterExperiment(experiment *v1alpha2.Experiment) (bool, error)
 	DeleteExperiment(experimentName string) error
 	GetExperiment(experimentName string) (*v1alpha2.Experiment, error)
 	GetExperimentList() ([]*v1alpha2.ExperimentSummary, error)
@@ -213,6 +214,19 @@ func (d *dbConn) DeleteExperiment(experimentName string) error {
 	_, err := d.db.Exec("DELETE FROM experiments WHERE name = ?", experimentName)
 	return err
 }
+
+func (d *dbConn) PreCheckRegisterExperiment(experiment *v1alpha2.Experiment) (bool, error) {
+	_, err := d.GetExperiment(experiment.Name)
+	if err != nil {
+		if err == sql.ErrNoRows {
+			return true, nil
+		}
+		return false, err
+	} else {
+		return false, nil
+	}
+}
+
 func (d *dbConn) GetExperiment(experimentName string) (*v1alpha2.Experiment, error) {
 	var id string
 	var paramSpecs string
diff --git a/pkg/mock/v1alpha2/api/manager.go b/pkg/mock/v1alpha2/api/manager.go
index 63a012153db..243b001b6f2 100644
--- a/pkg/mock/v1alpha2/api/manager.go
+++ b/pkg/mock/v1alpha2/api/manager.go
@@ -215,6 +215,26 @@ func (mr *MockManagerClientMockRecorder) GetTrialList(arg0, arg1 interface{}, ar
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetTrialList", reflect.TypeOf((*MockManagerClient)(nil).GetTrialList), varargs...)
 }
 
+// PreCheckRegisterExperiment mocks base method
+func (m *MockManagerClient) PreCheckRegisterExperiment(arg0 context.Context, arg1 *v1alpha2.RegisterExperimentRequest, arg2 ...grpc.CallOption) (*v1alpha2.PreCheckRegisterExperimentReply, error) {
+	m.ctrl.T.Helper()
+	varargs := []interface{}{arg0, arg1}
+	for _, a := range arg2 {
+		varargs = append(varargs, a)
+	}
+	ret := m.ctrl.Call(m, "PreCheckRegisterExperiment", varargs...)
+	ret0, _ := ret[0].(*v1alpha2.PreCheckRegisterExperimentReply)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// PreCheckRegisterExperiment indicates an expected call of PreCheckRegisterExperiment
+func (mr *MockManagerClientMockRecorder) PreCheckRegisterExperiment(arg0, arg1 interface{}, arg2 ...interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	varargs := append([]interface{}{arg0, arg1}, arg2...)
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "PreCheckRegisterExperiment", reflect.TypeOf((*MockManagerClient)(nil).PreCheckRegisterExperiment), varargs...)
+}
+
 // RegisterExperiment mocks base method
 func (m *MockManagerClient) RegisterExperiment(arg0 context.Context, arg1 *v1alpha2.RegisterExperimentRequest, arg2 ...grpc.CallOption) (*v1alpha2.RegisterExperimentReply, error) {
 	m.ctrl.T.Helper()
diff --git a/pkg/mock/v1alpha2/db/db.go b/pkg/mock/v1alpha2/db/db.go
index 1cec11f2bec..545c55287fd 100644
--- a/pkg/mock/v1alpha2/db/db.go
+++ b/pkg/mock/v1alpha2/db/db.go
@@ -163,6 +163,21 @@ func (mr *MockKatibDBInterfaceMockRecorder) GetTrialList(arg0, arg1 interface{})
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetTrialList", reflect.TypeOf((*MockKatibDBInterface)(nil).GetTrialList), arg0, arg1)
 }
 
+// PreCheckRegisterExperiment mocks base method
+func (m *MockKatibDBInterface) PreCheckRegisterExperiment(arg0 *v1alpha2.Experiment) (bool, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "PreCheckRegisterExperiment", arg0)
+	ret0, _ := ret[0].(bool)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// PreCheckRegisterExperiment indicates an expected call of PreCheckRegisterExperiment
+func (mr *MockKatibDBInterfaceMockRecorder) PreCheckRegisterExperiment(arg0 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "PreCheckRegisterExperiment", reflect.TypeOf((*MockKatibDBInterface)(nil).PreCheckRegisterExperiment), arg0)
+}
+
 // RegisterExperiment mocks base method
 func (m *MockKatibDBInterface) RegisterExperiment(arg0 *v1alpha2.Experiment) error {
 	m.ctrl.T.Helper()
diff --git a/pkg/mock/v1alpha2/experiment/managerclient/managerclient.go b/pkg/mock/v1alpha2/experiment/managerclient/managerclient.go
index 41c67fe13e9..4a69cd49347 100644
--- a/pkg/mock/v1alpha2/experiment/managerclient/managerclient.go
+++ b/pkg/mock/v1alpha2/experiment/managerclient/managerclient.go
@@ -62,19 +62,19 @@ func (mr *MockManagerClientMockRecorder) DeleteExperimentInDB(arg0 interface{})
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "DeleteExperimentInDB", reflect.TypeOf((*MockManagerClient)(nil).DeleteExperimentInDB), arg0)
 }
 
-// GetExperimentFromDB mocks base method
-func (m *MockManagerClient) GetExperimentFromDB(arg0 *v1alpha2.Experiment) (*v1alpha20.GetExperimentReply, error) {
+// PreCheckRegisterExperimentInDB mocks base method
+func (m *MockManagerClient) PreCheckRegisterExperimentInDB(arg0 *v1alpha2.Experiment) (*v1alpha20.PreCheckRegisterExperimentReply, error) {
 	m.ctrl.T.Helper()
-	ret := m.ctrl.Call(m, "GetExperimentFromDB", arg0)
-	ret0, _ := ret[0].(*v1alpha20.GetExperimentReply)
+	ret := m.ctrl.Call(m, "PreCheckRegisterExperimentInDB", arg0)
+	ret0, _ := ret[0].(*v1alpha20.PreCheckRegisterExperimentReply)
 	ret1, _ := ret[1].(error)
 	return ret0, ret1
 }
 
-// GetExperimentFromDB indicates an expected call of GetExperimentFromDB
-func (mr *MockManagerClientMockRecorder) GetExperimentFromDB(arg0 interface{}) *gomock.Call {
+// PreCheckRegisterExperimentInDB indicates an expected call of PreCheckRegisterExperimentInDB
+func (mr *MockManagerClientMockRecorder) PreCheckRegisterExperimentInDB(arg0 interface{}) *gomock.Call {
 	mr.mock.ctrl.T.Helper()
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetExperimentFromDB", reflect.TypeOf((*MockManagerClient)(nil).GetExperimentFromDB), arg0)
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "PreCheckRegisterExperimentInDB", reflect.TypeOf((*MockManagerClient)(nil).PreCheckRegisterExperimentInDB), arg0)
 }
 
 // UpdateExperimentStatusInDB mocks base method
diff --git a/test/scripts/v1alpha2/run-tests.sh b/test/scripts/v1alpha2/run-tests.sh
index b15deef9d2d..405609d0559 100755
--- a/test/scripts/v1alpha2/run-tests.sh
+++ b/test/scripts/v1alpha2/run-tests.sh
@@ -75,7 +75,7 @@ sed -i -e "s@image: katib\/suggestion-random@image: ${REGISTRY}\/${REPO_NAME}\/v
 TIMEOUT=120
 PODNUM=$(kubectl get deploy -n kubeflow | grep -v NAME | wc -l)
 until kubectl get pods -n kubeflow | grep Running | [[ $(wc -l) -eq $PODNUM ]]; do
-    echo Pod Status $(kubectl get pods -n kubeflow | grep Running | wc -l)/$PODNUM
+    echo Pod Status $(kubectl get pods -n kubeflow | grep "1/1" | wc -l)/$PODNUM
     
     sleep 10
     TIMEOUT=$(( TIMEOUT - 1 ))