diff --git a/cmd/thanos/downsample.go b/cmd/thanos/downsample.go
index 2da673d03b..97f90d6f96 100644
--- a/cmd/thanos/downsample.go
+++ b/cmd/thanos/downsample.go
@@ -361,7 +361,7 @@ func processDownsampling(
 	downsampleDuration := time.Since(begin)
 	level.Info(logger).Log("msg", "downsampled block",
 		"from", m.ULID, "to", id, "duration", downsampleDuration, "duration_ms", downsampleDuration.Milliseconds())
-	metrics.downsampleDuration.WithLabelValues(compact.DefaultGroupKey(m.Thanos)).Observe(downsampleDuration.Seconds())
+	metrics.downsampleDuration.WithLabelValues(m.Thanos.GroupKey()).Observe(downsampleDuration.Seconds())
 
 	if err := block.VerifyIndex(logger, filepath.Join(resdir, block.IndexFilename), m.MinTime, m.MaxTime); err != nil {
 		return errors.Wrap(err, "output block index not valid")
diff --git a/cmd/thanos/tools_bucket.go b/cmd/thanos/tools_bucket.go
index ab7a172c6a..02ee7d69e6 100644
--- a/cmd/thanos/tools_bucket.go
+++ b/cmd/thanos/tools_bucket.go
@@ -623,7 +623,7 @@ func registerBucketWeb(app extkingpin.AppClause, objStoreConfig *extflag.PathOrC
 			[]block.MetadataFilter{
 				block.NewTimePartitionMetaFilter(filterConf.MinTime, filterConf.MaxTime),
 				block.NewLabelShardedMetaFilter(relabelConfig),
-				block.NewDeduplicateFilter(),
+				block.NewDeduplicateFilter(block.FetcherConcurrency),
 			}, nil)
 		if err != nil {
 			return err
diff --git a/pkg/block/fetcher.go b/pkg/block/fetcher.go
index 80c38e071d..38ce4e88c0 100644
--- a/pkg/block/fetcher.go
+++ b/pkg/block/fetcher.go
@@ -23,7 +23,6 @@ import (
 	"github.com/prometheus/client_golang/prometheus/promauto"
 	"github.com/prometheus/prometheus/model/labels"
 	"github.com/prometheus/prometheus/model/relabel"
-	"github.com/prometheus/prometheus/tsdb"
 	"golang.org/x/sync/errgroup"
 	"gopkg.in/yaml.v2"
 
@@ -673,37 +672,6 @@ func (f *DeduplicateFilter) DuplicateIDs() []ulid.ULID {
 	return f.duplicateIDs
 }
 
-<<<<<<< HEAD
-func addNodeBySources(root, add *Node) bool {
-	var rootNode *Node
-	childSources := add.Compaction.Sources
-	for _, node := range root.Children {
-		parentSources := node.Compaction.Sources
-
-		// Block exists with same sources, add as child.
-		if contains(parentSources, childSources) && contains(childSources, parentSources) {
-			node.Children = append(node.Children, add)
-			return true
-		}
-
-		// Block's sources are present in other block's sources, add as child.
-		if contains(parentSources, childSources) {
-			rootNode = node
-			break
-		}
-	}
-
-	// Block cannot be attached to any child nodes, add it as child of root.
-	if rootNode == nil {
-		root.Children = append(root.Children, add)
-		return true
-	}
-
-	return addNodeBySources(rootNode, add)
-}
-
-=======
->>>>>>> Move group key function to the metadata package. Deduplicate within compaction groups and in parallel.
 func contains(s1, s2 []ulid.ULID) bool {
 	for _, a := range s2 {
 		found := false
diff --git a/pkg/compact/compact_test.go b/pkg/compact/compact_test.go
index 9eb0a32be3..1b9ce35d76 100644
--- a/pkg/compact/compact_test.go
+++ b/pkg/compact/compact_test.go
@@ -228,7 +228,7 @@ func TestRetentionProgressCalculate(t *testing.T) {
 	m[2].Thanos.Labels = map[string]string{"a": "1", "b": "2"}
 	m[2].Thanos.Downsample.Resolution = downsample.ResLevel2
 	for ind, meta := range m {
-		keys[ind] = DefaultGroupKey(meta.Thanos)
+		keys[ind] = meta.Thanos.GroupKey()
 	}
 
 	ps := NewRetentionProgressCalculator(reg, nil)
@@ -369,7 +369,7 @@ func TestCompactProgressCalculate(t *testing.T) {
 	m[2].Thanos.Labels = map[string]string{"a": "1", "b": "2"}
 	m[2].Thanos.Downsample.Resolution = 1
 	for ind, meta := range m {
-		keys[ind] = DefaultGroupKey(meta.Thanos)
+		keys[ind] = meta.Thanos.GroupKey()
 	}
 
 	ps := NewCompactionProgressCalculator(reg, planner)
@@ -491,7 +491,7 @@ func TestDownsampleProgressCalculate(t *testing.T) {
 	m[2].Thanos.Labels = map[string]string{"a": "1", "b": "2"}
 	m[2].Thanos.Downsample.Resolution = downsample.ResLevel2
 	for ind, meta := range m {
-		keys[ind] = DefaultGroupKey(meta.Thanos)
+		keys[ind] = meta.Thanos.GroupKey()
 	}
 
 	ds := NewDownsampleProgressCalculator(reg)