dedup with buffer start index

go.sum

@@ -1629,8 +1629,6 @@ github.com/stretchr/testify v1.8.2/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o
 github.com/stretchr/testify v1.8.3/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
 github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
 github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
-github.com/stretchr/testify v1.11.0 h1:ib4sjIrwZKxE5u/Japgo/7SJV3PvgjGiRNAvTVGqQl8=
-github.com/stretchr/testify v1.11.0/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
 github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
 github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
 github.com/stvp/tempredis v0.0.0-20181119212430-b82af8480203 h1:QVqDTf3h2WHt08YuiTGPZLls0Wq99X9bWd0Q5ZSBesM=

weed/mq/broker/broker_grpc_query.go

@@ -50,33 +50,13 @@ func (b *MessageQueueBroker) GetUnflushedMessages(req *mq_pb.GetUnflushedMessage
 		flushedBufferRanges = make([]BufferRange, 0)
 	}
 
-	// Determine filtering criteria based on oneof start_filter
+	// Use buffer_start index for precise deduplication
 	lastFlushTsNs := localPartition.LogBuffer.LastFlushTsNs
-	var startTimeNs int64
-	var startBufferIndex int64
-	var filterType string
+	startBufferIndex := req.StartBufferIndex
+	startTimeNs := lastFlushTsNs // Still respect last flush time for safety
 
-	// Handle oneof start_filter
-	switch filter := req.StartFilter.(type) {
-	case *mq_pb.GetUnflushedMessagesRequest_StartTimeNs:
-		startTimeNs = filter.StartTimeNs
-		filterType = "timestamp"
-		// Use the more restrictive of lastFlushTsNs vs requested startTimeNs
-		if lastFlushTsNs > startTimeNs {
-			startTimeNs = lastFlushTsNs
-		}
-	case *mq_pb.GetUnflushedMessagesRequest_StartBufferIndex:
-		startBufferIndex = filter.StartBufferIndex
-		startTimeNs = lastFlushTsNs // Still respect last flush time
-		filterType = "buffer_index"
-	default:
-		// No specific filter provided, use lastFlushTsNs as default
-		startTimeNs = lastFlushTsNs
-		filterType = "default"
-	}
-
-	glog.V(2).Infof("Streaming unflushed messages for %v %v, filter_type=%s, timestamp >= %d, buffer >= %d, excluding %d flushed buffer ranges",
-		t, partition, filterType, startTimeNs, startBufferIndex, len(flushedBufferRanges))
+	glog.V(2).Infof("Streaming unflushed messages for %v %v, buffer >= %d, timestamp >= %d (safety), excluding %d flushed buffer ranges",
+		t, partition, startBufferIndex, startTimeNs, len(flushedBufferRanges))
 
 	// Stream messages from LogBuffer with filtering
 	messageCount := 0

weed/pb/mq_broker.proto

@@ -361,10 +361,7 @@ message CloseSubscribersResponse {
 message GetUnflushedMessagesRequest {
     schema_pb.Topic topic = 1;
     schema_pb.Partition partition = 2;
-    oneof start_filter {
-        int64 start_time_ns = 3;      // Filter by timestamp (messages after this time)
-        int64 start_buffer_index = 4; // Filter by buffer index (messages from buffers >= this index)
-    }
+    int64 start_buffer_index = 3; // Filter by buffer index (messages from buffers >= this index)
 }
 
 message GetUnflushedMessagesResponse {

weed/pb/mq_pb/mq_broker.pb.go

@@ -2577,11 +2577,7 @@ type GetUnflushedMessagesRequest struct {
 	state            protoimpl.MessageState `protogen:"open.v1"`
 	Topic            *schema_pb.Topic       `protobuf:"bytes,1,opt,name=topic,proto3" json:"topic,omitempty"`
 	Partition        *schema_pb.Partition   `protobuf:"bytes,2,opt,name=partition,proto3" json:"partition,omitempty"`
-	// Types that are valid to be assigned to StartFilter:
-	//
-	//	*GetUnflushedMessagesRequest_StartTimeNs
-	//	*GetUnflushedMessagesRequest_StartBufferIndex
-	StartFilter   isGetUnflushedMessagesRequest_StartFilter `protobuf_oneof:"start_filter"`
+	StartBufferIndex int64                  `protobuf:"varint,3,opt,name=start_buffer_index,json=startBufferIndex,proto3" json:"start_buffer_index,omitempty"` // Filter by buffer index (messages from buffers >= this index)
 	unknownFields    protoimpl.UnknownFields
 	sizeCache        protoimpl.SizeCache
 }
@@ -2630,47 +2626,13 @@ func (x *GetUnflushedMessagesRequest) GetPartition() *schema_pb.Partition {
 	return nil
 }
 
-func (x *GetUnflushedMessagesRequest) GetStartFilter() isGetUnflushedMessagesRequest_StartFilter {
-	if x != nil {
-		return x.StartFilter
-	}
-	return nil
-}
-
-func (x *GetUnflushedMessagesRequest) GetStartTimeNs() int64 {
-	if x != nil {
-		if x, ok := x.StartFilter.(*GetUnflushedMessagesRequest_StartTimeNs); ok {
-			return x.StartTimeNs
-		}
-	}
-	return 0
-}
-
 func (x *GetUnflushedMessagesRequest) GetStartBufferIndex() int64 {
 	if x != nil {
-		if x, ok := x.StartFilter.(*GetUnflushedMessagesRequest_StartBufferIndex); ok {
 		return x.StartBufferIndex
 	}
-	}
 	return 0
 }
 
-type isGetUnflushedMessagesRequest_StartFilter interface {
-	isGetUnflushedMessagesRequest_StartFilter()
-}
-
-type GetUnflushedMessagesRequest_StartTimeNs struct {
-	StartTimeNs int64 `protobuf:"varint,3,opt,name=start_time_ns,json=startTimeNs,proto3,oneof"` // Filter by timestamp (messages after this time)
-}
-
-type GetUnflushedMessagesRequest_StartBufferIndex struct {
-	StartBufferIndex int64 `protobuf:"varint,4,opt,name=start_buffer_index,json=startBufferIndex,proto3,oneof"` // Filter by buffer index (messages from buffers >= this index)
-}
-
-func (*GetUnflushedMessagesRequest_StartTimeNs) isGetUnflushedMessagesRequest_StartFilter() {}
-
-func (*GetUnflushedMessagesRequest_StartBufferIndex) isGetUnflushedMessagesRequest_StartFilter() {}
-
 type GetUnflushedMessagesResponse struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	Message       *LogEntry              `protobuf:"bytes,1,opt,name=message,proto3" json:"message,omitempty"`                               // Single message per response (streaming)
@@ -3895,13 +3857,11 @@ const file_mq_broker_proto_rawDesc = "" +
 	"\x05topic\x18\x01 \x01(\v2\x10.schema_pb.TopicR\x05topic\x12 \n" +
 	"\funix_time_ns\x18\x02 \x01(\x03R\n" +
 	"unixTimeNs\"\x1a\n" +
-	"\x18CloseSubscribersResponse\"\xdf\x01\n" +
+	"\x18CloseSubscribersResponse\"\xa7\x01\n" +
 	"\x1bGetUnflushedMessagesRequest\x12&\n" +
 	"\x05topic\x18\x01 \x01(\v2\x10.schema_pb.TopicR\x05topic\x122\n" +
-	"\tpartition\x18\x02 \x01(\v2\x14.schema_pb.PartitionR\tpartition\x12$\n" +
-	"\rstart_time_ns\x18\x03 \x01(\x03H\x00R\vstartTimeNs\x12.\n" +
-	"\x12start_buffer_index\x18\x04 \x01(\x03H\x00R\x10startBufferIndexB\x0e\n" +
-	"\fstart_filter\"\x8a\x01\n" +
+	"\tpartition\x18\x02 \x01(\v2\x14.schema_pb.PartitionR\tpartition\x12,\n" +
+	"\x12start_buffer_index\x18\x03 \x01(\x03R\x10startBufferIndex\"\x8a\x01\n" +
 	"\x1cGetUnflushedMessagesResponse\x120\n" +
 	"\amessage\x18\x01 \x01(\v2\x16.messaging_pb.LogEntryR\amessage\x12\x14\n" +
 	"\x05error\x18\x02 \x01(\tR\x05error\x12\"\n" +
@@ -4168,10 +4128,6 @@ func file_mq_broker_proto_init() {
 		(*SubscribeFollowMeRequest_Ack)(nil),
 		(*SubscribeFollowMeRequest_Close)(nil),
 	}
-	file_mq_broker_proto_msgTypes[42].OneofWrappers = []any{
-		(*GetUnflushedMessagesRequest_StartTimeNs)(nil),
-		(*GetUnflushedMessagesRequest_StartBufferIndex)(nil),
-	}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
 		File: protoimpl.DescBuilder{

weed/query/engine/broker_client.go

@@ -2,6 +2,7 @@ package engine
 
 import (
 	"context"
+	"encoding/json"
 	"fmt"
 	"io"
 	"strconv"
@@ -16,6 +17,7 @@ import (
 	"github.com/seaweedfs/seaweedfs/weed/pb/master_pb"
 	"github.com/seaweedfs/seaweedfs/weed/pb/mq_pb"
 	"github.com/seaweedfs/seaweedfs/weed/pb/schema_pb"
+	"github.com/seaweedfs/seaweedfs/weed/util"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/credentials/insecure"
 	jsonpb "google.golang.org/protobuf/encoding/protojson"
@@ -429,7 +431,7 @@ func (c *BrokerClient) ListTopicPartitions(ctx context.Context, namespace, topic
 }
 
 // GetUnflushedMessages returns only messages that haven't been flushed to disk yet
-// Uses buffer_start metadata to determine what data has been persisted vs still in-memory
+// Uses buffer_start metadata from disk files for precise deduplication
 // This prevents double-counting when combining with disk-based data
 func (c *BrokerClient) GetUnflushedMessages(ctx context.Context, namespace, topicName string, partition topic.Partition, startTimeNs int64) ([]*filer_pb.LogEntry, error) {
 	// Step 1: Find the broker that hosts this partition
@@ -438,7 +440,7 @@ func (c *BrokerClient) GetUnflushedMessages(ctx context.Context, namespace, topi
 		return []*filer_pb.LogEntry{}, nil
 	}
 
-	// Step 2: Connect to broker and call the GetUnflushedMessages gRPC method
+	// Step 2: Connect to broker
 	conn, err := grpc.Dial(c.brokerAddress, c.grpcDialOption)
 	if err != nil {
 		// Return empty slice if connection fails - prevents double-counting
@@ -448,7 +450,16 @@ func (c *BrokerClient) GetUnflushedMessages(ctx context.Context, namespace, topi
 
 	client := mq_pb.NewSeaweedMessagingClient(conn)
 
-	// Step 3: Prepare the request using oneof start_filter (timestamp-based)
+	// Step 3: Get earliest buffer_start from disk files for precise deduplication
+	topicObj := topic.Topic{Namespace: namespace, Name: topicName}
+	partitionPath := topic.PartitionDir(topicObj, partition)
+	earliestBufferIndex, err := c.getEarliestBufferStart(ctx, partitionPath)
+	if err != nil {
+		// If we can't get buffer info, use 0 (get all unflushed data)
+		earliestBufferIndex = 0
+	}
+
+	// Step 4: Prepare request using buffer index filtering only
 	request := &mq_pb.GetUnflushedMessagesRequest{
 		Topic: &schema_pb.Topic{
 			Namespace: namespace,
@@ -460,16 +471,10 @@ func (c *BrokerClient) GetUnflushedMessages(ctx context.Context, namespace, topi
 			RangeStop:  partition.RangeStop,
 			UnixTimeNs: partition.UnixTimeNs,
 		},
-		StartFilter: &mq_pb.GetUnflushedMessagesRequest_StartTimeNs{
-			StartTimeNs: startTimeNs,
-		},
-		// TODO: Could use buffer index filtering for more precision:
-		// StartFilter: &mq_pb.GetUnflushedMessagesRequest_StartBufferIndex{
-		//     StartBufferIndex: latestBufferIndex,
-		// },
+		StartBufferIndex: earliestBufferIndex,
 	}
 
-	// Step 4: Call the broker streaming API
+	// Step 5: Call the broker streaming API
 	stream, err := client.GetUnflushedMessages(ctx, request)
 	if err != nil {
 		// Return empty slice if gRPC call fails - prevents double-counting
@@ -510,3 +515,58 @@ func (c *BrokerClient) GetUnflushedMessages(ctx context.Context, namespace, topi
 
 	return logEntries, nil
 }
+
+// getEarliestBufferStart finds the earliest buffer_start index from disk files in the partition
+// This is used for precise deduplication - any buffer index >= this value may still be in memory
+func (c *BrokerClient) getEarliestBufferStart(ctx context.Context, partitionPath string) (int64, error) {
+	filerClient, err := c.GetFilerClient()
+	if err != nil {
+		return 0, fmt.Errorf("failed to get filer client: %v", err)
+	}
+
+	var earliestBufferIndex int64 = -1 // -1 means no buffer_start found
+
+	err = filer_pb.ReadDirAllEntries(ctx, filerClient, util.FullPath(partitionPath), "", func(entry *filer_pb.Entry, isLast bool) error {
+		// Skip directories and parquet files
+		if entry.IsDirectory || strings.HasSuffix(entry.Name, ".parquet") {
+			return nil
+		}
+
+		// Extract buffer_start from file extended attributes
+		bufferStart := c.getBufferStartFromEntry(entry)
+		if bufferStart != nil && bufferStart.StartIndex > 0 {
+			if earliestBufferIndex == -1 || bufferStart.StartIndex < earliestBufferIndex {
+				earliestBufferIndex = bufferStart.StartIndex
+			}
+		}
+
+		return nil
+	})
+
+	if err != nil {
+		return 0, fmt.Errorf("failed to scan partition directory: %v", err)
+	}
+
+	if earliestBufferIndex == -1 {
+		return 0, fmt.Errorf("no buffer_start metadata found in partition")
+	}
+
+	return earliestBufferIndex, nil
+}
+
+// getBufferStartFromEntry extracts LogBufferStart from file entry metadata
+func (c *BrokerClient) getBufferStartFromEntry(entry *filer_pb.Entry) *LogBufferStart {
+	if entry.Extended == nil {
+		return nil
+	}
+
+	// Parse buffer_start format
+	if startJson, exists := entry.Extended["buffer_start"]; exists {
+		var bufferStart LogBufferStart
+		if err := json.Unmarshal(startJson, &bufferStart); err == nil {
+			return &bufferStart
+		}
+	}
+
+	return nil
+}

weed/query/engine/hybrid_message_scanner.go

@@ -174,8 +174,8 @@ func (hms *HybridMessageScanner) scanUnflushedData(ctx context.Context, partitio
 		return results, nil
 	}
 
-	// Step 1: Get unflushed data from broker using our new interface method
-	// This method uses buffer_start metadata to avoid double-counting
+	// Step 1: Get unflushed data from broker using buffer_start-based method
+	// This method uses buffer_start metadata to avoid double-counting with exact precision
 	unflushedEntries, err := hms.brokerClient.GetUnflushedMessages(ctx, hms.topic.Namespace, hms.topic.Name, partition, options.StartTimeNs)
 	if err != nil {
 		// Log error but don't fail the query - continue with disk data only