Update doc: service api

Signed-off-by: GuoRentong <rentong.guo@zilliz.com>

docs/developer_guides/appendix_a_basic_components.md

@@ -98,7 +98,7 @@ type TsMsg interface {
 type MsgPack struct {
   BeginTs Timestamp
   EndTs Timestamp
-  Msgs []*TsMsg
+  Msgs []TsMsg
 }
 
 

docs/developer_guides/chap03_index_builder.md

@@ -0,0 +1,40 @@
+
+
+## 8. Index Service
+
+
+
+#### 8.1 Overview
+
+
+
+#### 8.2 API
+
+```protobuf
+enum IndexStatus {
+    NONE = 0;
+    UNISSUED = 1;
+    INPROGRESS = 2;
+    FINISHED = 3;
+}
+```
+
+
+
+```go
+type IndexDescription struct {
+	ID                UniqueID
+	Status            IndexStatus
+	EnqueueTime       time.Time
+	ScheduleTime      time.Time
+	BuildCompleteTime time.Time
+}
+
+
+type Client interface {
+  BuildIndex(dataPaths []string, typeParams map[string]string, indexParams map[string]string) (UniqueID, error)
+	DescribeIndex(indexID UniqueID) (*IndexDescription, error)
+	GetIndexFilePaths(indexID UniqueID) ([]string, error)
+}
+```
+

docs/developer_guides/chap04_message_stream.md

@@ -0,0 +1,33 @@
+
+
+## 8. Message Stream Service
+
+
+
+#### 8.1 Overview
+
+
+
+#### 8.2 API
+
+
+
+```go
+type OwnerDescription struct {
+  Role string
+  Address string
+  //Token string
+  DescriptionText string
+}
+
+type ChannelDescription struct {
+  Owner OwnerDescription
+}
+
+type Client interface {
+  CreateChannels(ownerDescription OwnerDescription, numChannels int) (ChannelID []string, error)
+  DestoryChannels(channelID []string) error
+  DescribeChannels(channelID []string) ([]ChannelDescription, error)
+}
+```
+

docs/developer_guides/chap05_proxy.md

@@ -2,6 +2,29 @@
 
 ## 6. Proxy
 
+#### 6.0 Proxy Service API
+
+```protobuf
+message Credential {
+	string address
+	//TODO: we should add keys/tokens here
+}
+
+message ProxyInfo {
+	common.Status
+	string address
+	int32 port
+}
+
+service ProxyService {
+	rpc RegisterLink(Credential) returns (ProxyInfo){}	//TODO: call IAM
+}
+```
+
+
+
+
+
 #### 6.1 Proxy Instance
 
 ```go

docs/developer_guides/chap07_query_node.md

@@ -1,6 +1,6 @@
 
 
-## 8. Query Node
+## 8. Query Service
 
 
 
@@ -8,6 +8,91 @@
 
 
 
+#### 8.2 API
+
+
+
+
+
+```go
+type Client interface {
+  CreateQueryNodeGroup(nodeInstanceType string, numInstances int) (groupID UniqueID, error)
+  DestoryQueryNodeGroup(groupID UniqueID) error
+  DescribeQueryNodeGroup(groupID UniqueID) (QueryNodeGroupDescription, error)
+  DescribeParition(groupID UniqueID, dbID UniqueID, collID UniqueID, partitionIDs []UniqueID) ([]PartitionDescription, error)
+  CreateQueryChannel(groupID UniqueID) (QueryChannelInfo, error)
+  LoadPartitions(groupID UniqueID, dbID UniqueID, collID UniqueID, partitionIDs []UniqueID) error
+  ReleasePartitions(groupID UniqueID, dbID UniqueID, collID UniqueID, PartitionIDs []UniqueID) error
+}
+```
+
+#### 
+
+```go
+// examples of node instance type (nodeInstanceType)
+defaultInstanceType = "default"
+userDefinedInstanceType = "custom.instance.type"
+ec2StandardInstanceType = "c4.2xlarge"
+```
+
+
+
+```go
+type QueryChannelInfo struct {
+  RequestChannel string
+  ResultChannel string
+}
+```
+
+
+
+```go
+type ResourceCost struct {
+  MemUsage int64
+  CpuUsage float32
+}
+
+type QueryNodeDescription struct {
+  ResourceCost ResourceCost 
+}
+
+type CollectionDescription struct {
+  ParitionIDs []UniqueID
+}
+
+type DbDescription struct {
+  CollectionDescriptions []CollectionDescription
+}
+
+type QueryNodeGroupDescription struct {
+  DbDescriptions map[UniqueID]DbDescription
+  NodeDescriptions map[UniqueID]QueryNodeDescription
+}
+```
+
+
+
+```go
+type PartitionState = int
+
+const (
+  NOT_EXIST PartitionState = 0
+  ON_DISK PartitionState = 1
+  PARTIAL_IN_MEMORY PartitionState = 2
+	IN_MEMORY PartitionState = 3
+  PARTIAL_IN_GPU PartitionState = 4
+  IN_GPU PartitionState = 5
+)
+
+type PartitionDescription struct {
+  ID UniqueID
+  State PartitionState
+  ResourceCost ResourceCost
+}
+```
+
+
+
 
 
 #### 8.2 Collection Replica

internal/core/src/segcore/plan_c.cpp

@@ -75,6 +75,12 @@ GetTopK(CPlan plan) {
     return res;
 }
 
+const char*
+GetMetricType(CPlan plan) {
+    auto query_plan = static_cast<milvus::query::Plan*>(plan);
+    return strdup(query_plan->plan_node_->query_info_.metric_type_.c_str());
+}
+
 void
 DeletePlan(CPlan cPlan) {
     auto plan = (milvus::query::Plan*)cPlan;

internal/core/src/segcore/plan_c.h

@@ -35,6 +35,9 @@ GetNumOfQueries(CPlaceholderGroup placeholder_group);
 int64_t
 GetTopK(CPlan plan);
 
+const char*
+GetMetricType(CPlan plan);
+
 void
 DeletePlan(CPlan plan);
 

internal/core/src/segcore/reduce_c.cpp

@@ -64,6 +64,11 @@ struct SearchResultPair {
         return (distance_ < pair.distance_);
     }
 
+    bool
+    operator>(const SearchResultPair& pair) const {
+        return (distance_ > pair.distance_);
+    }
+
     void
     reset_distance() {
         distance_ = search_result_->result_distances_[offset_];
@@ -89,7 +94,7 @@ GetResultData(std::vector<std::vector<int64_t>>& search_records,
     AssertInfo(topk > 0, "topK must greater than 0");
     for (int i = 0; i < topk; ++i) {
         result_pairs[0].reset_distance();
-        std::sort(result_pairs.begin(), result_pairs.end());
+        std::sort(result_pairs.begin(), result_pairs.end(), std::greater<>());
         auto& result_pair = result_pairs[0];
         auto index = result_pair.index_;
         is_selected[index] = true;

internal/core/src/segcore/segment_c.cpp

@@ -140,6 +140,11 @@ Search(CSegmentBase c_segment,
     auto status = CStatus();
     try {
         auto res = segment->Search(plan, placeholder_groups.data(), timestamps, num_groups, *query_result);
+        if (plan->plan_node_->query_info_.metric_type_ != "IP") {
+            for (auto& dis : query_result->result_distances_) {
+                dis *= -1;
+            }
+        }
         status.error_code = Success;
         status.error_msg = "";
     } catch (std::exception& e) {

internal/proto/internal_msg.proto

@@ -259,6 +259,7 @@ message SearchResult {
     uint64 timestamp = 6;
     int64 result_channelID = 7;
     repeated bytes hits = 8;
+    string metric_type = 9;
 }
 
 message TimeTickMsg {

internal/proto/internalpb/internal_msg.pb.go

@@ -1728,6 +1728,7 @@ type SearchResult struct {
 	Timestamp            uint64           `protobuf:"varint,6,opt,name=timestamp,proto3" json:"timestamp,omitempty"`
 	ResultChannelID      int64            `protobuf:"varint,7,opt,name=result_channelID,json=resultChannelID,proto3" json:"result_channelID,omitempty"`
 	Hits                 [][]byte         `protobuf:"bytes,8,rep,name=hits,proto3" json:"hits,omitempty"`
+	MetricType           string           `protobuf:"bytes,9,opt,name=metric_type,json=metricType,proto3" json:"metric_type,omitempty"`
 	XXX_NoUnkeyedLiteral struct{}         `json:"-"`
 	XXX_unrecognized     []byte           `json:"-"`
 	XXX_sizecache        int32            `json:"-"`
@@ -1814,6 +1815,13 @@ func (m *SearchResult) GetHits() [][]byte {
 	return nil
 }
 
+func (m *SearchResult) GetMetricType() string {
+	if m != nil {
+		return m.MetricType
+	}
+	return ""
+}
+
 type TimeTickMsg struct {
 	MsgType              MsgType  `protobuf:"varint,1,opt,name=msg_type,json=msgType,proto3,enum=milvus.proto.internal.MsgType" json:"msg_type,omitempty"`
 	PeerID               int64    `protobuf:"varint,2,opt,name=peerID,proto3" json:"peerID,omitempty"`
@@ -2653,120 +2661,121 @@ func init() {
 func init() { proto.RegisterFile("internal_msg.proto", fileDescriptor_7eb37f6b80b23116) }
 
 var fileDescriptor_7eb37f6b80b23116 = []byte{
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+	0x14, 0x6c, 0x7d, 0x4a, 0xc1, 0x9e, 0xa3, 0xc3, 0xcf, 0x35, 0xa8, 0x3e, 0xc4, 0xf1, 0xd6, 0x3e,
+	0xf6, 0xa5, 0x83, 0x45, 0xd1, 0x4d, 0xdb, 0x3a, 0x72, 0x20, 0x30, 0x4e, 0x94, 0x99, 0x64, 0x7d,
+	0xc8, 0xab, 0xcc, 0x05, 0xfb, 0xec, 0x6d, 0x58, 0xa0, 0xdc, 0x79, 0xec, 0xfa, 0xb4, 0x27, 0x03,
+	0x64, 0xc1, 0xae, 0x52, 0xfe, 0xb6, 0x18, 0x8a, 0x02, 0x97, 0xa9, 0xa9, 0xd2, 0xc1, 0xb0, 0x27,
+	0x24, 0xd6, 0x3b, 0x00, 0x89, 0x6a, 0x02, 0x50, 0x16, 0x7e, 0xda, 0x64, 0xf8, 0x7d, 0x15, 0xaa,
+	0x1e, 0x8e, 0xb7, 0x38, 0xf6, 0x5b, 0xba, 0xdc, 0x1d, 0x66, 0x51, 0x4b, 0x56, 0xb2, 0xd3, 0xe9,
+	0xd6, 0x0f, 0x74, 0xa8, 0x7d, 0x2b, 0x72, 0x7b, 0x9d, 0xb0, 0x87, 0xa7, 0xcf, 0x14, 0xff, 0x11,
+	0x45, 0xbf, 0xf7, 0x28, 0xdf, 0x20, 0x72, 0x81, 0xc8, 0x1e, 0x39, 0xc8, 0xb3, 0x27, 0x19, 0x0a,
+	0xec, 0x54, 0x68, 0xe6, 0x0c, 0xdd, 0x78, 0x90, 0x16, 0x0b, 0x90, 0xa2, 0x3d, 0x21, 0x21, 0x6d,
+	0x68, 0xa4, 0x13, 0x98, 0x1b, 0xa8, 0x92, 0x51, 0xdf, 0xba, 0x37, 0x35, 0x93, 0x1f, 0xe2, 0xf8,
+	0x6d, 0xd7, 0x1f, 0xe1, 0x9e, 0x4b, 0x99, 0x5d, 0x4f, 0x16, 0x11, 0x6f, 0x59, 0x4f, 0x35, 0x00,
+	0x49, 0x40, 0x24, 0xfb, 0xf9, 0x45, 0xb5, 0x8f, 0xb2, 0x28, 0xf9, 0x12, 0xac, 0x84, 0xa3, 0xc0,
+	0x61, 0xe8, 0xbb, 0x31, 0xf6, 0x9c, 0x04, 0x06, 0x4f, 0xe0, 0x90, 0x70, 0x14, 0xd8, 0xea, 0xa7,
+	0xfd, 0xe4, 0x17, 0xeb, 0x87, 0x1a, 0xc0, 0x9b, 0xc2, 0x72, 0xa5, 0xc6, 0xd9, 0x3b, 0x8e, 0x36,
+	0xe5, 0x8e, 0x33, 0x81, 0x4e, 0x2f, 0xa2, 0xdb, 0x4e, 0xd1, 0x89, 0xc2, 0xc5, 0x93, 0xde, 0xe7,
+	0xbd, 0x19, 0xee, 0xcc, 0x8d, 0x4f, 0xe8, 0xca, 0x67, 0xeb, 0x67, 0xaa, 0x5d, 0x2c, 0xb4, 0x53,
+	0x2a, 0x15, 0xbc, 0xac, 0x9d, 0xf5, 0xb2, 0xac, 0x35, 0x41, 0xc4, 0xc6, 0x0e, 0xa7, 0x4f, 0x30,
+	0x4d, 0x12, 0x25, 0xda, 0xa7, 0x4f, 0x50, 0xa4, 0x81, 0x44, 0x12, 0x9d, 0xf0, 0x74, 0xb7, 0x10,
+	0x18, 0xa2, 0x13, 0x4e, 0xbe, 0x00, 0x37, 0x18, 0x76, 0x31, 0x8c, 0xfd, 0xb1, 0x13, 0x44, 0x3d,
+	0x7a, 0x44, 0x31, 0x4d, 0x15, 0x33, 0xfd, 0x61, 0x37, 0x91, 0x5b, 0x7f, 0xd7, 0xa0, 0xf9, 0xed,
+	0xb4, 0x82, 0x2a, 0xcd, 0x9e, 0x41, 0xdd, 0xfa, 0x9a, 0x34, 0xb6, 0xc0, 0x6f, 0x4e, 0xef, 0x38,
+	0x83, 0x64, 0x2f, 0x70, 0xec, 0x2b, 0xa5, 0xb6, 0xa1, 0x2e, 0xdd, 0x91, 0xac, 0x51, 0x9a, 0xeb,
+	0x83, 0xdc, 0xf3, 0x36, 0x1c, 0x65, 0xcf, 0xd6, 0x2f, 0x75, 0x20, 0xaa, 0xe7, 0x20, 0x9d, 0xf4,
+	0xdc, 0x5d, 0x14, 0x5e, 0x9b, 0x7e, 0x51, 0x38, 0x7f, 0x02, 0xfc, 0x0c, 0x28, 0xb3, 0xf2, 0x86,
+	0x60, 0xa1, 0x08, 0xb4, 0xa1, 0x81, 0xa7, 0x31, 0x73, 0xd3, 0xa4, 0xab, 0x5e, 0x3a, 0xe9, 0xe4,
+	0x6b, 0x49, 0x26, 0xbf, 0xab, 0xc3, 0x4a, 0x7a, 0x95, 0x7c, 0xc1, 0xeb, 0x62, 0x5e, 0xbf, 0xd3,
+	0xe1, 0x95, 0x02, 0xaf, 0x3d, 0x16, 0xf5, 0x19, 0x72, 0xfe, 0x82, 0xdb, 0x3c, 0x6e, 0xaf, 0xff,
+	0xc5, 0x80, 0x6a, 0x62, 0x30, 0xa9, 0x41, 0xd9, 0x7b, 0x14, 0x85, 0x68, 0xbe, 0x44, 0x56, 0xe1,
+	0x86, 0x77, 0xf6, 0xcf, 0x0b, 0xb3, 0x47, 0x96, 0x61, 0xc9, 0x2b, 0xf6, 0xf5, 0x4d, 0x24, 0x04,
+	0x9a, 0x5e, 0xa1, 0xad, 0x6d, 0x1e, 0x91, 0x5b, 0xb0, 0xec, 0x9d, 0xef, 0xfc, 0x9a, 0x62, 0xdf,
+	0x37, 0xbd, 0x62, 0x73, 0x94, 0x9b, 0x03, 0xb9, 0xc4, 0x37, 0x30, 0xce, 0x4e, 0xf9, 0xdc, 0xa4,
+	0x64, 0x15, 0x4c, 0xef, 0x4c, 0x8f, 0xd2, 0xfc, 0xbd, 0x46, 0x96, 0xa1, 0xe9, 0x15, 0x9a, 0x70,
+	0xe6, 0x1f, 0x34, 0x42, 0x60, 0xd1, 0x9b, 0xec, 0x32, 0x99, 0x7f, 0xd4, 0xc8, 0x2d, 0x20, 0xde,
+	0xb9, 0x66, 0x8c, 0xf9, 0x27, 0x8d, 0xac, 0xc0, 0x92, 0x57, 0xe8, 0x59, 0x70, 0xf3, 0xcf, 0x1a,
+	0xb9, 0x01, 0x0d, 0x6f, 0xa2, 0x3c, 0x99, 0xbf, 0xd2, 0xd5, 0xa7, 0x26, 0x63, 0xca, 0x7c, 0x57,
+	0x27, 0x77, 0xe0, 0xa6, 0x37, 0x35, 0xd0, 0xcc, 0xf7, 0x74, 0xd2, 0x80, 0xaa, 0xa7, 0xba, 0x03,
+	0xe6, 0x8f, 0x0c, 0x39, 0x52, 0xd7, 0x56, 0xf3, 0xc7, 0x06, 0xa9, 0x43, 0xc5, 0x93, 0xe7, 0x43,
+	0xf3, 0x27, 0xea, 0x27, 0x75, 0xfc, 0x37, 0x3f, 0x34, 0xa4, 0xfa, 0x93, 0x97, 0x01, 0xf3, 0x3f,
+	0x06, 0x69, 0x42, 0xcd, 0x4b, 0xcf, 0xb3, 0xe6, 0xaf, 0x6b, 0x52, 0xeb, 0xe2, 0x56, 0x61, 0xbe,
+	0x5f, 0x23, 0x4b, 0x00, 0x5e, 0x76, 0xec, 0x31, 0x7f, 0x53, 0x7b, 0xfd, 0x0d, 0x58, 0x48, 0xff,
+	0x3f, 0x24, 0x00, 0x95, 0x5d, 0x97, 0xc7, 0xc8, 0xcc, 0x97, 0xc4, 0xb3, 0x8d, 0x6e, 0x0f, 0x99,
+	0xa9, 0x89, 0xe7, 0xef, 0x30, 0x2a, 0xe4, 0xba, 0xf0, 0xf9, 0x9e, 0x08, 0x4c, 0xd3, 0xd8, 0x6e,
+	0x7f, 0x77, 0xbb, 0x4f, 0xe3, 0xc1, 0xe8, 0x50, 0x44, 0xcd, 0xe6, 0x13, 0xea, 0xfb, 0xf4, 0x49,
+	0x8c, 0xdd, 0xc1, 0xa6, 0x8a, 0xa8, 0x2f, 0xf6, 0x28, 0x8f, 0x19, 0x3d, 0x1c, 0xc5, 0xd8, 0xdb,
+	0x4c, 0x93, 0x65, 0x53, 0x86, 0x59, 0x36, 0x1c, 0x1e, 0x1e, 0x56, 0xa4, 0xe4, 0xc1, 0xff, 0x02,
+	0x00, 0x00, 0xff, 0xff, 0xc1, 0x89, 0xef, 0x28, 0xb0, 0x1f, 0x00, 0x00,
 }

internal/proxy/task.go

@@ -487,6 +487,7 @@ func (qt *QueryTask) PostExecute() error {
 				Hits: make([][]byte, 0),
 			}
 
+			const minFloat32 = -1 * float32(math.MaxFloat32)
 			for i := 0; i < nq; i++ {
 				locs := make([]int, availableQueryNodeNum)
 				reducedHits := &servicepb.Hits{
@@ -496,18 +497,18 @@ func (qt *QueryTask) PostExecute() error {
 				}
 
 				for j := 0; j < topk; j++ {
-					choice, minDistance := 0, float32(math.MaxFloat32)
+					choice, maxDistance := 0, minFloat32
 					for q, loc := range locs { // query num, the number of ways to merge
 						distance := hits[q][i].Scores[loc]
-						if distance < minDistance {
+						if distance > maxDistance {
 							choice = q
-							minDistance = distance
+							maxDistance = distance
 						}
 					}
 					choiceOffset := locs[choice]
 					// check if distance is valid, `invalid` here means very very big,
 					// in this process, distance here is the smallest, so the rest of distance are all invalid
-					if hits[choice][i].Scores[choiceOffset] >= float32(math.MaxFloat32) {
+					if hits[choice][i].Scores[choiceOffset] <= minFloat32 {
 						break
 					}
 					reducedHits.IDs = append(reducedHits.IDs, hits[choice][i].IDs[choiceOffset])
@@ -517,6 +518,11 @@ func (qt *QueryTask) PostExecute() error {
 					reducedHits.Scores = append(reducedHits.Scores, hits[choice][i].Scores[choiceOffset])
 					locs[choice]++
 				}
+				if searchResults[0].MetricType != "IP" {
+					for k := range reducedHits.Scores {
+						reducedHits.Scores[k] *= -1
+					}
+				}
 				reducedHitsBs, err := proto.Marshal(reducedHits)
 				if err != nil {
 					log.Println("marshal error")

internal/querynode/plan.go

@@ -41,6 +41,13 @@ func (plan *Plan) getTopK() int64 {
 	return int64(topK)
 }
 
+func (plan *Plan) getMetricType() string {
+	cMetricType := C.GetMetricType(plan.cPlan)
+	defer C.free(unsafe.Pointer(cMetricType))
+	metricType := C.GoString(cMetricType)
+	return metricType
+}
+
 func (plan *Plan) delete() {
 	C.DeletePlan(plan.cPlan)
 }

internal/querynode/plan_test.go

@@ -27,6 +27,8 @@ func TestPlan_Plan(t *testing.T) {
 	assert.NotEqual(t, plan, nil)
 	topk := plan.getTopK()
 	assert.Equal(t, int(topk), 10)
+	metricType := plan.getMetricType()
+	assert.Equal(t, metricType, "L2")
 	plan.delete()
 	deleteCollection(collection)
 }

internal/querynode/search_service.go

@@ -336,6 +336,7 @@ func (ss *searchService) search(msg msgstream.TsMsg) error {
 			Timestamp:       searchTimestamp,
 			ResultChannelID: searchMsg.ResultChannelID,
 			Hits:            hits,
+			MetricType:      plan.getMetricType(),
 		}
 		searchResultMsg := &msgstream.SearchResultMsg{
 			BaseMsg:      msgstream.BaseMsg{HashValues: []uint32{uint32(searchMsg.ResultChannelID)}},