snapshot of https://github.com/seaweedfs/seaweedfs.git (master, 2026-09-16; blobs > 131072B omitted)

unmaintained/load_test/load_test_meta_tail/load_test_meta_tail.go

@@ -0,0 +1,108 @@
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/seaweedfs/seaweedfs/weed/glog"
+	"github.com/seaweedfs/seaweedfs/weed/pb"
+	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
+	"github.com/seaweedfs/seaweedfs/weed/util"
+	util_http "github.com/seaweedfs/seaweedfs/weed/util/http"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials/insecure"
+)
+
+var (
+	dir           = flag.String("dir", "/tmp", "directory to create files")
+	n             = flag.Int("n", 100, "the number of metadata")
+	tailFiler     = flag.String("filer", "localhost:8888", "the filer address")
+	isWrite       = flag.Bool("write", false, "only write")
+	writeInterval = flag.Duration("writeInterval", 0, "write interval, e.g., 1s")
+)
+
+func main() {
+	flag.Parse()
+	util_http.InitGlobalHttpClient()
+
+	if *isWrite {
+		startGenerateMetadata()
+		return
+	}
+
+	expected := 0
+	startSubscribeMetadata(func(event *filer_pb.SubscribeMetadataResponse) error {
+		if event.Directory != *dir {
+			return nil
+		}
+		name := event.EventNotification.NewEntry.Name
+		glog.V(0).Infof("=> %s ts:%+v", name, time.Unix(0, event.TsNs))
+		id := name[4:]
+		if x, err := strconv.Atoi(id); err == nil {
+			if x != expected {
+				return fmt.Errorf("Expected file%d Actual %s\n", expected, name)
+			}
+			expected++
+		} else {
+			return err
+		}
+		time.Sleep(10 * time.Millisecond)
+		return nil
+	})
+
+}
+
+func startGenerateMetadata() {
+	pb.WithFilerClient(false, util.RandomInt32(), pb.ServerAddress(*tailFiler), grpc.WithTransportCredentials(insecure.NewCredentials()), func(client filer_pb.SeaweedFilerClient) error {
+
+		for i := 0; i < *n; i++ {
+			name := fmt.Sprintf("file%d", i)
+			glog.V(0).Infof("write %s/%s", *dir, name)
+			if err := filer_pb.CreateEntry(context.Background(), client, &filer_pb.CreateEntryRequest{
+				Directory: *dir,
+				Entry: &filer_pb.Entry{
+					Name: name,
+				},
+			}); err != nil {
+				fmt.Printf("create entry %s: %v\n", name, err)
+				return err
+			}
+			if *writeInterval > 0 {
+				time.Sleep(*writeInterval)
+			}
+		}
+
+		return nil
+
+	})
+}
+
+func startSubscribeMetadata(eachEntryFunc func(event *filer_pb.SubscribeMetadataResponse) error) {
+
+	prefix := *dir
+	if !strings.HasSuffix(prefix, "/") {
+		prefix = prefix + "/"
+	}
+
+	metadataFollowOption := &pb.MetadataFollowOption{
+		ClientName:             "tail",
+		ClientId:               0,
+		ClientEpoch:            0,
+		SelfSignature:          0,
+		PathPrefix:             prefix,
+		AdditionalPathPrefixes: nil,
+		DirectoriesToWatch:     nil,
+		StartTsNs:              0,
+		StopTsNs:               0,
+		EventErrorType:         pb.TrivialOnError,
+	}
+	tailErr := pb.FollowMetadata(pb.ServerAddress(*tailFiler), grpc.WithTransportCredentials(insecure.NewCredentials()), metadataFollowOption, eachEntryFunc)
+
+	if tailErr != nil {
+		fmt.Printf("tail %s: %v\n", *tailFiler, tailErr)
+	}
+}