mirror of https://github.com/milvus-io/milvus.git
581 lines
22 KiB
Go
581 lines
22 KiB
Go
// Licensed to the LF AI & Data foundation under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package grpcdatacoordclient
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import (
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"context"
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"fmt"
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"github.com/milvus-io/milvus/internal/log"
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"github.com/milvus-io/milvus/internal/proto/commonpb"
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"github.com/milvus-io/milvus/internal/proto/datapb"
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"github.com/milvus-io/milvus/internal/proto/internalpb"
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"github.com/milvus-io/milvus/internal/proto/milvuspb"
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"github.com/milvus-io/milvus/internal/util/funcutil"
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"github.com/milvus-io/milvus/internal/util/grpcclient"
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"github.com/milvus-io/milvus/internal/util/paramtable"
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"github.com/milvus-io/milvus/internal/util/sessionutil"
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"github.com/milvus-io/milvus/internal/util/typeutil"
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clientv3 "go.etcd.io/etcd/client/v3"
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"go.uber.org/zap"
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"google.golang.org/grpc"
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)
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// ClientParams is the parameters of client singleton
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var ClientParams paramtable.GrpcClientConfig
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// Client is the datacoord grpc client
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type Client struct {
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grpcClient grpcclient.GrpcClient
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sess *sessionutil.Session
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}
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// NewClient creates a new client instance
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func NewClient(ctx context.Context, metaRoot string, etcdCli *clientv3.Client) (*Client, error) {
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sess := sessionutil.NewSession(ctx, metaRoot, etcdCli)
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if sess == nil {
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err := fmt.Errorf("new session error, maybe can not connect to etcd")
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log.Debug("DataCoordClient NewClient failed", zap.Error(err))
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return nil, err
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}
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ClientParams.InitOnce(typeutil.DataCoordRole)
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client := &Client{
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grpcClient: &grpcclient.ClientBase{
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ClientMaxRecvSize: ClientParams.ClientMaxRecvSize,
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ClientMaxSendSize: ClientParams.ClientMaxSendSize,
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DialTimeout: ClientParams.DialTimeout,
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KeepAliveTime: ClientParams.KeepAliveTime,
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KeepAliveTimeout: ClientParams.KeepAliveTimeout,
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RetryServiceNameConfig: "milvus.proto.data.DataCoord",
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MaxAttempts: ClientParams.MaxAttempts,
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InitialBackoff: ClientParams.InitialBackoff,
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MaxBackoff: ClientParams.MaxBackoff,
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BackoffMultiplier: ClientParams.BackoffMultiplier,
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},
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sess: sess,
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}
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client.grpcClient.SetRole(typeutil.DataCoordRole)
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client.grpcClient.SetGetAddrFunc(client.getDataCoordAddr)
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client.grpcClient.SetNewGrpcClientFunc(client.newGrpcClient)
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return client, nil
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}
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func (c *Client) newGrpcClient(cc *grpc.ClientConn) interface{} {
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return datapb.NewDataCoordClient(cc)
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}
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func (c *Client) getDataCoordAddr() (string, error) {
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key := c.grpcClient.GetRole()
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msess, _, err := c.sess.GetSessions(key)
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if err != nil {
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log.Debug("DataCoordClient, getSessions failed", zap.Any("key", key), zap.Error(err))
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return "", err
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}
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ms, ok := msess[key]
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if !ok {
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log.Debug("DataCoordClient, not existed in msess ", zap.Any("key", key), zap.Any("len of msess", len(msess)))
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return "", fmt.Errorf("find no available datacoord, check datacoord state")
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}
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return ms.Address, nil
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}
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// Init initializes the client
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func (c *Client) Init() error {
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return nil
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}
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// Start enables the client
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func (c *Client) Start() error {
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return nil
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}
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// Stop stops the client
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func (c *Client) Stop() error {
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return c.grpcClient.Close()
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}
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// Register dummy
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func (c *Client) Register() error {
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return nil
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}
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// GetComponentStates calls DataCoord GetComponentStates services
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func (c *Client) GetComponentStates(ctx context.Context) (*internalpb.ComponentStates, error) {
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ret, err := c.grpcClient.ReCall(ctx, func(client interface{}) (interface{}, error) {
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if !funcutil.CheckCtxValid(ctx) {
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return nil, ctx.Err()
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}
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return client.(datapb.DataCoordClient).GetComponentStates(ctx, &internalpb.GetComponentStatesRequest{})
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*internalpb.ComponentStates), err
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}
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// GetTimeTickChannel return the name of time tick channel.
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func (c *Client) GetTimeTickChannel(ctx context.Context) (*milvuspb.StringResponse, error) {
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ret, err := c.grpcClient.ReCall(ctx, func(client interface{}) (interface{}, error) {
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if !funcutil.CheckCtxValid(ctx) {
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return nil, ctx.Err()
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}
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return client.(datapb.DataCoordClient).GetTimeTickChannel(ctx, &internalpb.GetTimeTickChannelRequest{})
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*milvuspb.StringResponse), err
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}
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// GetStatisticsChannel return the name of statistics channel.
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func (c *Client) GetStatisticsChannel(ctx context.Context) (*milvuspb.StringResponse, error) {
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ret, err := c.grpcClient.Call(ctx, func(client interface{}) (interface{}, error) {
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if !funcutil.CheckCtxValid(ctx) {
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return nil, ctx.Err()
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}
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return client.(datapb.DataCoordClient).GetStatisticsChannel(ctx, &internalpb.GetStatisticsChannelRequest{})
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*milvuspb.StringResponse), err
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}
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// Flush flushes a collection's data
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func (c *Client) Flush(ctx context.Context, req *datapb.FlushRequest) (*datapb.FlushResponse, error) {
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ret, err := c.grpcClient.ReCall(ctx, func(client interface{}) (interface{}, error) {
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if !funcutil.CheckCtxValid(ctx) {
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return nil, ctx.Err()
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}
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return client.(datapb.DataCoordClient).Flush(ctx, req)
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*datapb.FlushResponse), err
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}
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// AssignSegmentID applies allocations for specified Coolection/Partition and related Channel Name(Virtial Channel)
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//
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// ctx is the context to control request deadline and cancellation
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// req contains the requester's info(id and role) and the list of Assignment Request,
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// which coontains the specified collection, partitaion id, the related VChannel Name and row count it needs
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//
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// response struct `AssignSegmentIDResponse` contains the the assignment result for each request
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// error is returned only when some communication issue occurs
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// if some error occurs in the process of `AssignSegmentID`, it will be recorded and returned in `Status` field of response
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//
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// `AssignSegmentID` will applies current configured allocation policies for each request
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// if the VChannel is newly used, `WatchDmlChannels` will be invoked to notify a `DataNode`(selected by policy) to watch it
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// if there is anything make the allocation impossible, the response will not contain the corresponding result
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func (c *Client) AssignSegmentID(ctx context.Context, req *datapb.AssignSegmentIDRequest) (*datapb.AssignSegmentIDResponse, error) {
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ret, err := c.grpcClient.ReCall(ctx, func(client interface{}) (interface{}, error) {
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if !funcutil.CheckCtxValid(ctx) {
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return nil, ctx.Err()
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}
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return client.(datapb.DataCoordClient).AssignSegmentID(ctx, req)
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*datapb.AssignSegmentIDResponse), err
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}
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// GetSegmentStates requests segment state information
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//
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// ctx is the context to control request deadline and cancellation
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// req contains the list of segment id to query
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//
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// response struct `GetSegmentStatesResponse` contains the list of each state query result
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// when the segment is not found, the state entry will has the field `Status` to identify failure
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// otherwise the Segment State and Start position information will be returned
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// error is returned only when some communication issue occurs
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func (c *Client) GetSegmentStates(ctx context.Context, req *datapb.GetSegmentStatesRequest) (*datapb.GetSegmentStatesResponse, error) {
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ret, err := c.grpcClient.ReCall(ctx, func(client interface{}) (interface{}, error) {
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if !funcutil.CheckCtxValid(ctx) {
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return nil, ctx.Err()
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}
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return client.(datapb.DataCoordClient).GetSegmentStates(ctx, req)
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*datapb.GetSegmentStatesResponse), err
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}
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// GetInsertBinlogPaths requests binlog paths for specified segment
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//
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// ctx is the context to control request deadline and cancellation
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// req contains the segment id to query
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//
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// response struct `GetInsertBinlogPathsResponse` contains the fields list
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// and corresponding binlog path list
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// error is returned only when some communication issue occurs
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func (c *Client) GetInsertBinlogPaths(ctx context.Context, req *datapb.GetInsertBinlogPathsRequest) (*datapb.GetInsertBinlogPathsResponse, error) {
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ret, err := c.grpcClient.ReCall(ctx, func(client interface{}) (interface{}, error) {
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if !funcutil.CheckCtxValid(ctx) {
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return nil, ctx.Err()
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}
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return client.(datapb.DataCoordClient).GetInsertBinlogPaths(ctx, req)
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*datapb.GetInsertBinlogPathsResponse), err
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}
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// GetCollectionStatistics requests collection statistics
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//
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// ctx is the context to control request deadline and cancellation
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// req contains the collection id to query
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//
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// response struct `GetCollectionStatisticsResponse` contains the key-value list fields returning related data
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// only row count for now
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// error is returned only when some communication issue occurs
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func (c *Client) GetCollectionStatistics(ctx context.Context, req *datapb.GetCollectionStatisticsRequest) (*datapb.GetCollectionStatisticsResponse, error) {
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ret, err := c.grpcClient.ReCall(ctx, func(client interface{}) (interface{}, error) {
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if !funcutil.CheckCtxValid(ctx) {
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return nil, ctx.Err()
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}
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return client.(datapb.DataCoordClient).GetCollectionStatistics(ctx, req)
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*datapb.GetCollectionStatisticsResponse), err
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}
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// GetPartitionStatistics requests partition statistics
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//
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// ctx is the context to control request deadline and cancellation
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// req contains the collection and partition id to query
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//
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// response struct `GetPartitionStatisticsResponse` contains the key-value list fields returning related data
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// only row count for now
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// error is returned only when some communication issue occurs
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func (c *Client) GetPartitionStatistics(ctx context.Context, req *datapb.GetPartitionStatisticsRequest) (*datapb.GetPartitionStatisticsResponse, error) {
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ret, err := c.grpcClient.ReCall(ctx, func(client interface{}) (interface{}, error) {
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if !funcutil.CheckCtxValid(ctx) {
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return nil, ctx.Err()
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}
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return client.(datapb.DataCoordClient).GetPartitionStatistics(ctx, req)
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*datapb.GetPartitionStatisticsResponse), err
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}
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// GetSegmentInfoChannel DEPRECATED
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// legacy api to get SegmentInfo Channel name
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func (c *Client) GetSegmentInfoChannel(ctx context.Context) (*milvuspb.StringResponse, error) {
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ret, err := c.grpcClient.ReCall(ctx, func(client interface{}) (interface{}, error) {
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if !funcutil.CheckCtxValid(ctx) {
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return nil, ctx.Err()
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}
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return client.(datapb.DataCoordClient).GetSegmentInfoChannel(ctx, &datapb.GetSegmentInfoChannelRequest{})
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*milvuspb.StringResponse), err
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}
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// GetSegmentInfo requests segment info
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//
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// ctx is the context to control request deadline and cancellation
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// req contains the list of segment ids to query
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//
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// response struct `GetSegmentInfoResponse` contains the list of segment info
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// error is returned only when some communication issue occurs
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func (c *Client) GetSegmentInfo(ctx context.Context, req *datapb.GetSegmentInfoRequest) (*datapb.GetSegmentInfoResponse, error) {
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ret, err := c.grpcClient.ReCall(ctx, func(client interface{}) (interface{}, error) {
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if !funcutil.CheckCtxValid(ctx) {
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return nil, ctx.Err()
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}
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return client.(datapb.DataCoordClient).GetSegmentInfo(ctx, req)
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*datapb.GetSegmentInfoResponse), err
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}
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// SaveBinlogPaths updates segments binlogs(including insert binlogs, stats logs and delta logs)
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// and related message stream positions
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//
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// ctx is the context to control request deadline and cancellation
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// req contains the collection/partition id to query
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//
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// response status contains the status/error code and failing reason if any
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// error is returned only when some communication issue occurs
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//
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// there is a constraint that the `SaveBinlogPaths` requests of same segment shall be passed in sequence
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// the root reason is each `SaveBinlogPaths` will overwrite the checkpoint position
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// if the constraint is broken, the checkpoint position will not be monotonically increasing and the integrity will be compromised
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func (c *Client) SaveBinlogPaths(ctx context.Context, req *datapb.SaveBinlogPathsRequest) (*commonpb.Status, error) {
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// use Call here on purpose
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ret, err := c.grpcClient.Call(ctx, func(client interface{}) (interface{}, error) {
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if !funcutil.CheckCtxValid(ctx) {
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return nil, ctx.Err()
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}
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return client.(datapb.DataCoordClient).SaveBinlogPaths(ctx, req)
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*commonpb.Status), err
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}
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// GetRecoveryInfo request segment recovery info of collection/partition
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//
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// ctx is the context to control request deadline and cancellation
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// req contains the collection/partition id to query
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//
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// response struct `GetRecoveryInfoResponse` contains the list of segments info and corresponding vchannel info
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// error is returned only when some communication issue occurs
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func (c *Client) GetRecoveryInfo(ctx context.Context, req *datapb.GetRecoveryInfoRequest) (*datapb.GetRecoveryInfoResponse, error) {
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ret, err := c.grpcClient.ReCall(ctx, func(client interface{}) (interface{}, error) {
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if !funcutil.CheckCtxValid(ctx) {
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return nil, ctx.Err()
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}
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return client.(datapb.DataCoordClient).GetRecoveryInfo(ctx, req)
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*datapb.GetRecoveryInfoResponse), err
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}
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// GetFlushedSegments returns flushed segment list of requested collection/parition
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//
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// ctx is the context to control request deadline and cancellation
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// req contains the collection/partition id to query
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// when partition is lesser or equal to 0, all flushed segments of collection will be returned
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//
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// response struct `GetFlushedSegmentsResponse` contains flushed segment id list
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// error is returned only when some communication issue occurs
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func (c *Client) GetFlushedSegments(ctx context.Context, req *datapb.GetFlushedSegmentsRequest) (*datapb.GetFlushedSegmentsResponse, error) {
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ret, err := c.grpcClient.ReCall(ctx, func(client interface{}) (interface{}, error) {
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if !funcutil.CheckCtxValid(ctx) {
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return nil, ctx.Err()
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}
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return client.(datapb.DataCoordClient).GetFlushedSegments(ctx, req)
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*datapb.GetFlushedSegmentsResponse), err
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}
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// GetMetrics gets all metrics of datacoord
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func (c *Client) GetMetrics(ctx context.Context, req *milvuspb.GetMetricsRequest) (*milvuspb.GetMetricsResponse, error) {
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ret, err := c.grpcClient.ReCall(ctx, func(client interface{}) (interface{}, error) {
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if !funcutil.CheckCtxValid(ctx) {
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return nil, ctx.Err()
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}
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return client.(datapb.DataCoordClient).GetMetrics(ctx, req)
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*milvuspb.GetMetricsResponse), err
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}
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// CompleteCompaction completes a compaction with the result
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func (c *Client) CompleteCompaction(ctx context.Context, req *datapb.CompactionResult) (*commonpb.Status, error) {
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ret, err := c.grpcClient.ReCall(ctx, func(client interface{}) (interface{}, error) {
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if !funcutil.CheckCtxValid(ctx) {
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return nil, ctx.Err()
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}
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return client.(datapb.DataCoordClient).CompleteCompaction(ctx, req)
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*commonpb.Status), err
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}
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// ManualCompaction triggers a compaction for a collection
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func (c *Client) ManualCompaction(ctx context.Context, req *milvuspb.ManualCompactionRequest) (*milvuspb.ManualCompactionResponse, error) {
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ret, err := c.grpcClient.ReCall(ctx, func(client interface{}) (interface{}, error) {
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if !funcutil.CheckCtxValid(ctx) {
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return nil, ctx.Err()
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}
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return client.(datapb.DataCoordClient).ManualCompaction(ctx, req)
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*milvuspb.ManualCompactionResponse), err
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}
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// GetCompactionState gets the state of a compaction
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func (c *Client) GetCompactionState(ctx context.Context, req *milvuspb.GetCompactionStateRequest) (*milvuspb.GetCompactionStateResponse, error) {
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ret, err := c.grpcClient.ReCall(ctx, func(client interface{}) (interface{}, error) {
|
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if !funcutil.CheckCtxValid(ctx) {
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return nil, ctx.Err()
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}
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return client.(datapb.DataCoordClient).GetCompactionState(ctx, req)
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*milvuspb.GetCompactionStateResponse), err
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}
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// GetCompactionStateWithPlans gets the state of a compaction by plan
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func (c *Client) GetCompactionStateWithPlans(ctx context.Context, req *milvuspb.GetCompactionPlansRequest) (*milvuspb.GetCompactionPlansResponse, error) {
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ret, err := c.grpcClient.ReCall(ctx, func(client interface{}) (interface{}, error) {
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if !funcutil.CheckCtxValid(ctx) {
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return nil, ctx.Err()
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}
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return client.(datapb.DataCoordClient).GetCompactionStateWithPlans(ctx, req)
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})
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if err != nil || ret == nil {
|
|
return nil, err
|
|
}
|
|
return ret.(*milvuspb.GetCompactionPlansResponse), err
|
|
}
|
|
|
|
// WatchChannels notifies DataCoord to watch vchannels of a collection
|
|
func (c *Client) WatchChannels(ctx context.Context, req *datapb.WatchChannelsRequest) (*datapb.WatchChannelsResponse, error) {
|
|
ret, err := c.grpcClient.ReCall(ctx, func(client interface{}) (interface{}, error) {
|
|
if !funcutil.CheckCtxValid(ctx) {
|
|
return nil, ctx.Err()
|
|
}
|
|
return client.(datapb.DataCoordClient).WatchChannels(ctx, req)
|
|
})
|
|
if err != nil || ret == nil {
|
|
return nil, err
|
|
}
|
|
return ret.(*datapb.WatchChannelsResponse), err
|
|
}
|
|
|
|
// GetFlushState gets the flush state of multiple segments
|
|
func (c *Client) GetFlushState(ctx context.Context, req *milvuspb.GetFlushStateRequest) (*milvuspb.GetFlushStateResponse, error) {
|
|
ret, err := c.grpcClient.ReCall(ctx, func(client interface{}) (interface{}, error) {
|
|
if !funcutil.CheckCtxValid(ctx) {
|
|
return nil, ctx.Err()
|
|
}
|
|
return client.(datapb.DataCoordClient).GetFlushState(ctx, req)
|
|
})
|
|
if err != nil || ret == nil {
|
|
return nil, err
|
|
}
|
|
return ret.(*milvuspb.GetFlushStateResponse), err
|
|
}
|
|
|
|
// DropVirtualChannel drops virtual channel in datacoord.
|
|
func (c *Client) DropVirtualChannel(ctx context.Context, req *datapb.DropVirtualChannelRequest) (*datapb.DropVirtualChannelResponse, error) {
|
|
ret, err := c.grpcClient.ReCall(ctx, func(client interface{}) (interface{}, error) {
|
|
if !funcutil.CheckCtxValid(ctx) {
|
|
return nil, ctx.Err()
|
|
}
|
|
return client.(datapb.DataCoordClient).DropVirtualChannel(ctx, req)
|
|
})
|
|
if err != nil || ret == nil {
|
|
return nil, err
|
|
}
|
|
return ret.(*datapb.DropVirtualChannelResponse), err
|
|
}
|
|
|
|
// SetSegmentState sets the state of a given segment.
|
|
func (c *Client) SetSegmentState(ctx context.Context, req *datapb.SetSegmentStateRequest) (*datapb.SetSegmentStateResponse, error) {
|
|
ret, err := c.grpcClient.ReCall(ctx, func(client interface{}) (interface{}, error) {
|
|
if !funcutil.CheckCtxValid(ctx) {
|
|
return nil, ctx.Err()
|
|
}
|
|
return client.(datapb.DataCoordClient).SetSegmentState(ctx, req)
|
|
})
|
|
if err != nil || ret == nil {
|
|
return nil, err
|
|
}
|
|
return ret.(*datapb.SetSegmentStateResponse), err
|
|
}
|
|
|
|
// Import data files(json, numpy, etc.) on MinIO/S3 storage, read and parse them into sealed segments
|
|
func (c *Client) Import(ctx context.Context, req *datapb.ImportTaskRequest) (*datapb.ImportTaskResponse, error) {
|
|
ret, err := c.grpcClient.ReCall(ctx, func(client interface{}) (interface{}, error) {
|
|
if !funcutil.CheckCtxValid(ctx) {
|
|
return nil, ctx.Err()
|
|
}
|
|
return client.(datapb.DataCoordClient).Import(ctx, req)
|
|
})
|
|
if err != nil || ret == nil {
|
|
return nil, err
|
|
}
|
|
return ret.(*datapb.ImportTaskResponse), err
|
|
}
|
|
|
|
// UpdateSegmentStatistics is the client side caller of UpdateSegmentStatistics.
|
|
func (c *Client) UpdateSegmentStatistics(ctx context.Context, req *datapb.UpdateSegmentStatisticsRequest) (*commonpb.Status, error) {
|
|
ret, err := c.grpcClient.ReCall(ctx, func(client interface{}) (interface{}, error) {
|
|
if !funcutil.CheckCtxValid(ctx) {
|
|
return nil, ctx.Err()
|
|
}
|
|
return client.(datapb.DataCoordClient).UpdateSegmentStatistics(ctx, req)
|
|
})
|
|
if err != nil || ret == nil {
|
|
return nil, err
|
|
}
|
|
return ret.(*commonpb.Status), err
|
|
}
|
|
|
|
// AcquireSegmentLock acquire the reference lock of the segments.
|
|
func (c *Client) AcquireSegmentLock(ctx context.Context, req *datapb.AcquireSegmentLockRequest) (*commonpb.Status, error) {
|
|
ret, err := c.grpcClient.ReCall(ctx, func(client interface{}) (interface{}, error) {
|
|
if !funcutil.CheckCtxValid(ctx) {
|
|
return nil, ctx.Err()
|
|
}
|
|
return client.(datapb.DataCoordClient).AcquireSegmentLock(ctx, req)
|
|
})
|
|
if err != nil || ret == nil {
|
|
return nil, err
|
|
}
|
|
return ret.(*commonpb.Status), err
|
|
}
|
|
|
|
// ReleaseSegmentLock release the reference lock of the segments.
|
|
func (c *Client) ReleaseSegmentLock(ctx context.Context, req *datapb.ReleaseSegmentLockRequest) (*commonpb.Status, error) {
|
|
ret, err := c.grpcClient.ReCall(ctx, func(client interface{}) (interface{}, error) {
|
|
if !funcutil.CheckCtxValid(ctx) {
|
|
return nil, ctx.Err()
|
|
}
|
|
return client.(datapb.DataCoordClient).ReleaseSegmentLock(ctx, req)
|
|
})
|
|
if err != nil || ret == nil {
|
|
return nil, err
|
|
}
|
|
return ret.(*commonpb.Status), err
|
|
}
|
|
|
|
// AddSegment is the DataCoord client side code for AddSegment call.
|
|
func (c *Client) AddSegment(ctx context.Context, req *datapb.AddSegmentRequest) (*commonpb.Status, error) {
|
|
ret, err := c.grpcClient.ReCall(ctx, func(client interface{}) (interface{}, error) {
|
|
if !funcutil.CheckCtxValid(ctx) {
|
|
return nil, ctx.Err()
|
|
}
|
|
return client.(datapb.DataCoordClient).AddSegment(ctx, req)
|
|
})
|
|
if err != nil || ret == nil {
|
|
return nil, err
|
|
}
|
|
return ret.(*commonpb.Status), err
|
|
}
|