perf(bloom): Compute chunkrefs for series right before sending task to builder

pkg/bloombuild/common/tsdb.go

@@ -124,9 +124,9 @@ func (b *BloomTSDBStore) LoadTSDB(
 	return idx, nil
 }
 
-func NewTSDBSeriesIter(ctx context.Context, user string, f sharding.ForSeries, bounds v1.FingerprintBounds) (iter.Iterator[*v1.Series], error) {
+func NewTSDBSeriesIter(ctx context.Context, user string, f sharding.ForSeries, bounds v1.FingerprintBounds) (iter.Iterator[model.Fingerprint], error) {
 	// TODO(salvacorts): Create a pool
-	series := make([]*v1.Series, 0, 100)
+	series := make([]model.Fingerprint, 0, 100)
 
 	if err := f.ForSeries(
 		ctx,
@@ -138,19 +138,7 @@ func NewTSDBSeriesIter(ctx context.Context, user string, f sharding.ForSeries, b
 			case <-ctx.Done():
 				return true
 			default:
-				res := &v1.Series{
-					Fingerprint: fp,
-					Chunks:      make(v1.ChunkRefs, 0, len(chks)),
-				}
-				for _, chk := range chks {
-					res.Chunks = append(res.Chunks, v1.ChunkRef{
-						From:     model.Time(chk.MinTime),
-						Through:  model.Time(chk.MaxTime),
-						Checksum: chk.Checksum,
-					})
-				}
-
-				series = append(series, res)
+				series = append(series, fp)
 				return false
 			}
 		},
@@ -161,7 +149,7 @@ func NewTSDBSeriesIter(ctx context.Context, user string, f sharding.ForSeries, b
 
 	select {
 	case <-ctx.Done():
-		return iter.NewEmptyIter[*v1.Series](), ctx.Err()
+		return iter.NewEmptyIter[model.Fingerprint](), ctx.Err()
 	default:
 		return iter.NewCancelableIter(ctx, iter.NewSliceIter(series)), nil
 	}

pkg/bloombuild/common/tsdb_test.go

@@ -66,10 +66,10 @@ func TestTSDBSeriesIter(t *testing.T) {
 	itr, err := NewTSDBSeriesIter(context.Background(), "", forSeriesTestImpl(input), v1.NewBounds(0, math.MaxUint64))
 	require.NoError(t, err)
 
-	v1.EqualIterators(
+	v1.CompareIterators(
 		t,
-		func(a, b *v1.Series) {
-			require.Equal(t, a, b)
+		func(t *testing.T, a model.Fingerprint, b *v1.Series) {
+			require.Equal(t, a, b.Fingerprint)
 		},
 		itr,
 		srcItr,

pkg/bloombuild/planner/planner.go

@@ -227,9 +227,10 @@ func (p *Planner) runOne(ctx context.Context) error {
 	}
 
 	var (
-		wg     sync.WaitGroup
-		start  = time.Now()
-		status = statusFailure
+		wg        sync.WaitGroup
+		start     = time.Now()
+		status    = statusFailure
+		openTSDBs strategies.TSDBSet
 	)
 	defer func() {
 		p.metrics.buildCompleted.WithLabelValues(status).Inc()
@@ -238,6 +239,15 @@ func (p *Planner) runOne(ctx context.Context) error {
 		if status == statusSuccess {
 			p.metrics.buildLastSuccess.SetToCurrentTime()
 		}
+
+		// Close all open TSDBs.
+		// These are used to get the chunkrefs for the series in the gaps.
+		// We populate the chunkrefs when we send the task to the builder.
+		for idx, reader := range openTSDBs {
+			if err := reader.Close(); err != nil {
+				level.Error(p.logger).Log("msg", "failed to close tsdb", "tsdb", idx.Name(), "err", err)
+			}
+		}
 	}()
 
 	p.metrics.buildStarted.Inc()
@@ -275,7 +285,19 @@ func (p *Planner) runOne(ctx context.Context) error {
 				table:  table,
 			}
 
-			tasks, existingMetas, err := p.computeTasks(ctx, table, tenant)
+			tsdbs, err := p.tsdbStore.ResolveTSDBs(ctx, table, tenant)
+			if err != nil {
+				level.Error(logger).Log("msg", "failed to resolve tsdbs", "err", err)
+				continue
+			}
+
+			openTSDBs, err = openAllTSDBs(ctx, table, tenant, p.tsdbStore, tsdbs, openTSDBs)
+			if err != nil {
+				level.Error(logger).Log("msg", "failed to open all tsdbs", "err", err)
+				continue
+			}
+
+			tasks, existingMetas, err := p.computeTasks(ctx, table, tenant, openTSDBs)
 			if err != nil {
 				level.Error(logger).Log("msg", "failed to compute tasks", "err", err)
 				continue
@@ -286,7 +308,7 @@ func (p *Planner) runOne(ctx context.Context) error {
 
 			now := time.Now()
 			for _, task := range tasks {
-				queueTask := NewQueueTask(ctx, now, task, resultsCh)
+				queueTask := NewQueueTask(ctx, now, task, openTSDBs[task.TSDB], resultsCh)
 				if err := p.enqueueTask(queueTask); err != nil {
 					level.Error(logger).Log("msg", "error enqueuing task", "err", err)
 					continue
@@ -374,7 +396,8 @@ func (p *Planner) computeTasks(
 	ctx context.Context,
 	table config.DayTable,
 	tenant string,
-) ([]*protos.Task, []bloomshipper.Meta, error) {
+	tsdbs strategies.TSDBSet,
+) ([]*strategies.Task, []bloomshipper.Meta, error) {
 	strategy, err := strategies.NewStrategy(tenant, p.limits, p.logger)
 	if err != nil {
 		return nil, nil, fmt.Errorf("error creating strategy: %w", err)
@@ -402,29 +425,11 @@ func (p *Planner) computeTasks(
 		return nil, nil, fmt.Errorf("failed to delete outdated metas during planning: %w", err)
 	}
 
-	// Resolve TSDBs
-	tsdbs, err := p.tsdbStore.ResolveTSDBs(ctx, table, tenant)
-	if err != nil {
-		return nil, nil, fmt.Errorf("failed to resolve tsdbs: %w", err)
-	}
-
 	if len(tsdbs) == 0 {
 		return nil, metas, nil
 	}
 
-	openTSDBs, err := openAllTSDBs(ctx, table, tenant, p.tsdbStore, tsdbs)
-	if err != nil {
-		return nil, nil, fmt.Errorf("failed to open all tsdbs: %w", err)
-	}
-	defer func() {
-		for idx, reader := range openTSDBs {
-			if err := reader.Close(); err != nil {
-				level.Error(logger).Log("msg", "failed to close index", "err", err, "tsdb", idx.Name())
-			}
-		}
-	}()
-
-	tasks, err := strategy.Plan(ctx, table, tenant, openTSDBs, metas)
+	tasks, err := strategy.Plan(ctx, table, tenant, tsdbs, metas)
 	if err != nil {
 		return nil, nil, fmt.Errorf("failed to plan tasks: %w", err)
 	}
@@ -506,18 +511,26 @@ func openAllTSDBs(
 	tenant string,
 	store common.TSDBStore,
 	tsdbs []tsdb.SingleTenantTSDBIdentifier,
-) (map[tsdb.SingleTenantTSDBIdentifier]common.ClosableForSeries, error) {
-	openTSDBs := make(map[tsdb.SingleTenantTSDBIdentifier]common.ClosableForSeries, len(tsdbs))
+	alreadyOpen strategies.TSDBSet,
+) (strategies.TSDBSet, error) {
+	if len(alreadyOpen) == 0 {
+		alreadyOpen = make(strategies.TSDBSet, len(tsdbs))
+	}
+
 	for _, idx := range tsdbs {
-		tsdb, err := store.LoadTSDB(ctx, table, tenant, idx)
+		if _, ok := alreadyOpen[idx]; ok {
+			continue
+		}
+
+		reader, err := store.LoadTSDB(ctx, table, tenant, idx)
 		if err != nil {
 			return nil, fmt.Errorf("failed to load tsdb: %w", err)
 		}
 
-		openTSDBs[idx] = tsdb
+		alreadyOpen[idx] = reader
 	}
 
-	return openTSDBs, nil
+	return alreadyOpen, nil
 }
 
 // deleteOutdatedMetasAndBlocks filters out the outdated metas from the `metas` argument and deletes them from the store.
@@ -847,8 +860,13 @@ func (p *Planner) forwardTaskToBuilder(
 	builderID string,
 	task *QueueTask,
 ) (*protos.TaskResult, error) {
+	protoTask, err := task.ToProtoTask(builder.Context())
+	if err != nil {
+		return nil, fmt.Errorf("error converting task to proto task: %w", err)
+	}
+
 	msg := &protos.PlannerToBuilder{
-		Task: task.ToProtoTask(),
+		Task: protoTask,
 	}
 
 	if err := builder.Send(msg); err != nil {

pkg/bloombuild/planner/planner_test.go

@@ -713,12 +713,21 @@ func (f *fakeBuilder) Recv() (*protos.BuilderToPlanner, error) {
 }
 
 func createTasks(n int, resultsCh chan *protos.TaskResult) []*QueueTask {
+	forSeries := plannertest.NewFakeForSeries(plannertest.GenV1Series(v1.NewBounds(0, 100)))
+
 	tasks := make([]*QueueTask, 0, n)
 	// Enqueue tasks
 	for i := 0; i < n; i++ {
 		task := NewQueueTask(
 			context.Background(), time.Now(),
-			protos.NewTask(config.NewDayTable(plannertest.TestDay, "fake"), "fakeTenant", v1.NewBounds(0, 10), plannertest.TsdbID(1), nil),
+			strategies.NewTask(
+				config.NewDayTable(plannertest.TestDay, "fake"),
+				"fakeTenant",
+				v1.NewBounds(0, 10),
+				plannertest.TsdbID(1),
+				nil,
+			),
+			forSeries,
 			resultsCh,
 		)
 		tasks = append(tasks, task)

pkg/bloombuild/planner/plannertest/utils.go

@@ -6,13 +6,15 @@ import (
 	"time"
 
 	"github.com/prometheus/common/model"
+	"github.com/prometheus/prometheus/model/labels"
 
 	"github.com/grafana/loki/v3/pkg/compression"
 	v2 "github.com/grafana/loki/v3/pkg/iter/v2"
 	v1 "github.com/grafana/loki/v3/pkg/storage/bloom/v1"
 	"github.com/grafana/loki/v3/pkg/storage/config"
 	"github.com/grafana/loki/v3/pkg/storage/stores/shipper/bloomshipper"
 	"github.com/grafana/loki/v3/pkg/storage/stores/shipper/indexshipper/tsdb"
+	"github.com/grafana/loki/v3/pkg/storage/stores/shipper/indexshipper/tsdb/index"
 )
 
 var TestDay = ParseDayTime("2023-09-01")
@@ -87,11 +89,23 @@ func GenBlock(ref bloomshipper.BlockRef) (bloomshipper.Block, error) {
 	}, nil
 }
 
-func GenSeries(bounds v1.FingerprintBounds) []*v1.Series {
+func GenSeries(bounds v1.FingerprintBounds) []model.Fingerprint {
 	return GenSeriesWithStep(bounds, 1)
 }
 
-func GenSeriesWithStep(bounds v1.FingerprintBounds, step int) []*v1.Series {
+func GenSeriesWithStep(bounds v1.FingerprintBounds, step int) []model.Fingerprint {
+	series := make([]model.Fingerprint, 0, int(bounds.Max-bounds.Min+1)/step)
+	for i := bounds.Min; i <= bounds.Max; i += model.Fingerprint(step) {
+		series = append(series, i)
+	}
+	return series
+}
+
+func GenV1Series(bounds v1.FingerprintBounds) []*v1.Series {
+	return GenV1SeriesWithStep(bounds, 1)
+}
+
+func GenV1SeriesWithStep(bounds v1.FingerprintBounds, step int) []*v1.Series {
 	series := make([]*v1.Series, 0, int(bounds.Max-bounds.Min+1)/step)
 	for i := bounds.Min; i <= bounds.Max; i += model.Fingerprint(step) {
 		series = append(series, &v1.Series{
@@ -139,3 +153,43 @@ func ParseDayTime(s string) config.DayTime {
 		Time: model.TimeFromUnix(t.Unix()),
 	}
 }
+
+type FakeForSeries struct {
+	series []*v1.Series
+}
+
+func NewFakeForSeries(series []*v1.Series) *FakeForSeries {
+	return &FakeForSeries{
+		series: series,
+	}
+}
+
+func (f FakeForSeries) ForSeries(_ context.Context, _ string, ff index.FingerprintFilter, _ model.Time, _ model.Time, fn func(labels.Labels, model.Fingerprint, []index.ChunkMeta) (stop bool), _ ...*labels.Matcher) error {
+	overlapping := make([]*v1.Series, 0, len(f.series))
+	for _, s := range f.series {
+		if ff.Match(s.Fingerprint) {
+			overlapping = append(overlapping, s)
+		}
+	}
+
+	for _, s := range overlapping {
+		chunks := make([]index.ChunkMeta, 0, len(s.Chunks))
+		for _, c := range s.Chunks {
+			chunks = append(chunks, index.ChunkMeta{
+				MinTime:  int64(c.From),
+				MaxTime:  int64(c.Through),
+				Checksum: c.Checksum,
+				KB:       100,
+			})
+		}
+
+		if fn(labels.EmptyLabels(), s.Fingerprint, chunks) {
+			break
+		}
+	}
+	return nil
+}
+
+func (f FakeForSeries) Close() error {
+	return nil
+}