milvus/internal/querynode/flow_graph_query_node.go
congqixia db944cd09c
Refactor flowgraph and related invocation ()
Signed-off-by: Congqi Xia <congqi.xia@zilliz.com>
2021-09-29 20:19:59 +08:00

153 lines
4.5 KiB
Go

// Copyright (C) 2019-2020 Zilliz. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software distributed under the License
// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
// or implied. See the License for the specific language governing permissions and limitations under the License.
package querynode
import (
"context"
"errors"
"go.uber.org/zap"
"github.com/milvus-io/milvus/internal/log"
"github.com/milvus-io/milvus/internal/msgstream"
"github.com/milvus-io/milvus/internal/proto/internalpb"
"github.com/milvus-io/milvus/internal/util/flowgraph"
)
// queryNodeFlowGraph is a TimeTickedFlowGraph in query node
type queryNodeFlowGraph struct {
ctx context.Context
cancel context.CancelFunc
collectionID UniqueID
partitionID UniqueID
channel Channel
flowGraph *flowgraph.TimeTickedFlowGraph
dmlStream msgstream.MsgStream
}
func newQueryNodeFlowGraph(ctx context.Context,
loadType loadType,
collectionID UniqueID,
partitionID UniqueID,
streamingReplica ReplicaInterface,
tSafeReplica TSafeReplicaInterface,
channel Channel,
factory msgstream.Factory) *queryNodeFlowGraph {
ctx1, cancel := context.WithCancel(ctx)
q := &queryNodeFlowGraph{
ctx: ctx1,
cancel: cancel,
collectionID: collectionID,
partitionID: partitionID,
channel: channel,
flowGraph: flowgraph.NewTimeTickedFlowGraph(ctx1),
}
var dmStreamNode node = q.newDmInputNode(ctx1, factory)
var filterDmNode node = newFilteredDmNode(streamingReplica, loadType, collectionID, partitionID)
var insertNode node = newInsertNode(streamingReplica)
var serviceTimeNode node = newServiceTimeNode(ctx1, tSafeReplica, loadType, collectionID, partitionID, channel, factory)
q.flowGraph.AddNode(dmStreamNode)
q.flowGraph.AddNode(filterDmNode)
q.flowGraph.AddNode(insertNode)
q.flowGraph.AddNode(serviceTimeNode)
// dmStreamNode
var err = q.flowGraph.SetEdges(dmStreamNode.Name(),
[]string{},
[]string{filterDmNode.Name()},
)
if err != nil {
log.Error("set edges failed in node:", zap.String("node name", dmStreamNode.Name()))
}
// filterDmNode
err = q.flowGraph.SetEdges(filterDmNode.Name(),
[]string{dmStreamNode.Name()},
[]string{insertNode.Name()},
)
if err != nil {
log.Error("set edges failed in node:", zap.String("node name", filterDmNode.Name()))
}
// insertNode
err = q.flowGraph.SetEdges(insertNode.Name(),
[]string{filterDmNode.Name()},
[]string{serviceTimeNode.Name()},
)
if err != nil {
log.Error("set edges failed in node:", zap.String("node name", insertNode.Name()))
}
// serviceTimeNode
err = q.flowGraph.SetEdges(serviceTimeNode.Name(),
[]string{insertNode.Name()},
[]string{},
)
if err != nil {
log.Error("set edges failed in node:", zap.String("node name", serviceTimeNode.Name()))
}
return q
}
func (q *queryNodeFlowGraph) newDmInputNode(ctx context.Context, factory msgstream.Factory) *flowgraph.InputNode {
insertStream, err := factory.NewTtMsgStream(ctx)
if err != nil {
log.Warn(err.Error())
} else {
q.dmlStream = insertStream
}
maxQueueLength := Params.FlowGraphMaxQueueLength
maxParallelism := Params.FlowGraphMaxParallelism
node := flowgraph.NewInputNode(insertStream, "dmlInputNode", maxQueueLength, maxParallelism)
return node
}
func (q *queryNodeFlowGraph) consumerFlowGraph(channel Channel, subName ConsumeSubName) error {
if q.dmlStream == nil {
return errors.New("null dml message stream in flow graph")
}
q.dmlStream.AsConsumer([]string{channel}, subName)
log.Debug("query node flow graph consumes from pChannel",
zap.Any("collectionID", q.collectionID),
zap.Any("channel", channel),
zap.Any("subName", subName),
)
return nil
}
func (q *queryNodeFlowGraph) seekQueryNodeFlowGraph(position *internalpb.MsgPosition) error {
q.dmlStream.AsConsumer([]string{position.ChannelName}, position.MsgGroup)
err := q.dmlStream.Seek([]*internalpb.MsgPosition{position})
log.Debug("query node flow graph seeks from pChannel",
zap.Any("collectionID", q.collectionID),
zap.Any("channel", position.ChannelName),
)
return err
}
func (q *queryNodeFlowGraph) close() {
q.cancel()
q.flowGraph.Close()
log.Debug("stop query node flow graph",
zap.Any("collectionID", q.collectionID),
zap.Any("partitionID", q.partitionID),
zap.Any("channel", q.channel),
)
}