## 8. Index Service #### 8.1 Overview #### 8.2 Index Service Interface ```go type IndexCoord interface { Component TimeTickProvider BuildIndex(ctx context.Context, req *indexpb.BuildIndexRequest) (*indexpb.BuildIndexResponse, error) DropIndex(ctx context.Context, req *indexpb.DropIndexRequest) (*commonpb.Status, error) GetIndexStates(ctx context.Context, req *indexpb.GetIndexStatesRequest) (*indexpb.GetIndexStatesResponse, error) GetIndexFilePaths(ctx context.Context, req *indexpb.GetIndexFilePathsRequest) (*indexpb.GetIndexFilePathsResponse, error) GetMetrics(ctx context.Context, req *milvuspb.GetMetricsRequest) (*milvuspb.GetMetricsResponse, error) } ``` * *RegisterNode* ```go type MsgBase struct { MsgType MsgType MsgID UniqueID Timestamp uint64 SourceID UniqueID } type Address struct { Ip string Port int64 } type RegisterNodeRequest struct { Base *commonpb.MsgBase Address *commonpb.Address } type InitParams struct { NodeID UniqueID StartParams []*commonpb.KeyValuePair } type RegisterNodeResponse struct { InitParams *internalpb.InitParams Status *commonpb.Status } ``` * *BuildIndex* ```go type KeyValuePair struct { Key string Value string } type BuildIndexRequest struct { IndexBuildID UniqueID IndexName string IndexID UniqueID DataPaths []string TypeParams []*commonpb.KeyValuePair IndexParams []*commonpb.KeyValuePair } type BuildIndexResponse struct { Status *commonpb.Status IndexBuildID UniqueID } ``` * *DropIndex* ```go type DropIndexRequest struct { IndexID UniqueID } ``` * *GetIndexStates* ```go type GetIndexStatesRequest struct { IndexBuildIDs []UniqueID } const ( IndexState_IndexStateNone IndexState = 0 IndexState_Unissued IndexState = 1 IndexState_InProgress IndexState = 2 IndexState_Finished IndexState = 3 IndexState_Failed IndexState = 4 IndexState_Deleted IndexState = 5 ) type IndexInfo struct { State commonpb.IndexState IndexBuildID UniqueID IndexID UniqueID IndexName string Reason string } type GetIndexStatesResponse struct { Status *commonpb.Status States []*IndexInfo } ``` * *GetIndexFilePaths* ```go type GetIndexFilePathsRequest struct { IndexBuildIDs []UniqueID } type IndexFilePathInfo struct { Status *commonpb.Status IndexBuildID UniqueID IndexFilePaths []string } type GetIndexFilePathsResponse struct { Status *commonpb.Status FilePaths []*IndexFilePathInfo } ``` * *NotifyBuildIndex* ```go type NotifyBuildIndexRequest struct { Status *commonpb.Status IndexBuildID UniqueID IndexFilePaths []string NodeID UniqueID } ``` #### 8.3 Index Node Interface ```go type IndexNode interface { Component TimeTickProvider BuildIndex(ctx context.Context, req *indexpb.BuildIndexRequest) (*commonpb.Status, error) DropIndex(ctx context.Context, req *indexpb.DropIndexRequest) (*commonpb.Status, error) } ``` * *BuildIndex* ```go type KeyValuePair struct { Key string Value string } type BuildIndexRequest struct { IndexBuildID UniqueID IndexName string IndexID UniqueID DataPaths []string TypeParams []*commonpb.KeyValuePair IndexParams []*commonpb.KeyValuePair } ``` * *DropIndex* ```go type DropIndexRequest struct { IndexID UniqueID } ```