diff --git a/cmd/frostfs-adm/internal/modules/morph/balance.go b/cmd/frostfs-adm/internal/modules/morph/balance.go
index ca9d939f0..f97250c38 100644
--- a/cmd/frostfs-adm/internal/modules/morph/balance.go
+++ b/cmd/frostfs-adm/internal/modules/morph/balance.go
@@ -44,7 +44,6 @@ const (
 	notaryEnabled = true
 )
 
-// nolint: funlen, gocognit
 func dumpBalances(cmd *cobra.Command, _ []string) error {
 	var (
 		dumpStorage, _  = cmd.Flags().GetBool(dumpBalancesStorageFlag)
@@ -84,86 +83,110 @@ func dumpBalances(cmd *cobra.Command, _ []string) error {
 	printBalances(cmd, "Inner ring nodes balances:", irList)
 
 	if dumpStorage {
-		arr, err := unwrap.Array(inv.Call(nmHash, "netmap"))
-		if err != nil {
-			return errors.New("can't fetch the list of storage nodes")
-		}
-
-		snList := make([]accBalancePair, len(arr))
-		for i := range arr {
-			node, ok := arr[i].Value().([]stackitem.Item)
-			if !ok || len(node) == 0 {
-				return errors.New("can't parse the list of storage nodes")
-			}
-			bs, err := node[0].TryBytes()
-			if err != nil {
-				return errors.New("can't parse the list of storage nodes")
-			}
-			var ni netmap.NodeInfo
-			if err := ni.Unmarshal(bs); err != nil {
-				return fmt.Errorf("can't parse the list of storage nodes: %w", err)
-			}
-			pub, err := keys.NewPublicKeyFromBytes(ni.PublicKey(), elliptic.P256())
-			if err != nil {
-				return fmt.Errorf("can't parse storage node public key: %w", err)
-			}
-			snList[i].scriptHash = pub.GetScriptHash()
-		}
-
-		if err := fetchBalances(inv, gas.Hash, snList); err != nil {
+		if err := printStorageNodeBalances(cmd, inv, nmHash); err != nil {
 			return err
 		}
-		printBalances(cmd, "\nStorage node balances:", snList)
 	}
 
 	if dumpProxy {
-		h, err := nnsResolveHash(inv, nnsCs.Hash, proxyContract+".frostfs")
-		if err != nil {
-			return fmt.Errorf("can't get hash of the proxy contract: %w", err)
-		}
-
-		proxyList := []accBalancePair{{scriptHash: h}}
-		if err := fetchBalances(inv, gas.Hash, proxyList); err != nil {
+		if err := printProxyContractBalance(cmd, inv, nnsCs.Hash); err != nil {
 			return err
 		}
-		printBalances(cmd, "\nProxy contract balance:", proxyList)
 	}
 
 	if dumpAlphabet {
-		alphaList := make([]accBalancePair, len(irList))
-
-		w := io.NewBufBinWriter()
-		for i := range alphaList {
-			emit.AppCall(w.BinWriter, nnsCs.Hash, "resolve", callflag.ReadOnly,
-				getAlphabetNNSDomain(i),
-				int64(nns.TXT))
-		}
-		if w.Err != nil {
-			panic(w.Err)
-		}
-
-		alphaRes, err := c.InvokeScript(w.Bytes(), nil)
-		if err != nil {
-			return fmt.Errorf("can't fetch info from NNS: %w", err)
-		}
-
-		for i := range alphaList {
-			h, err := parseNNSResolveResult(alphaRes.Stack[i])
-			if err != nil {
-				return fmt.Errorf("can't fetch the alphabet contract #%d hash: %w", i, err)
-			}
-			alphaList[i].scriptHash = h
-		}
-
-		if err := fetchBalances(inv, gas.Hash, alphaList); err != nil {
+		if err := printAlphabetContractBalances(cmd, c, inv, len(irList), nnsCs.Hash); err != nil {
 			return err
 		}
-		printBalances(cmd, "\nAlphabet contracts balances:", alphaList)
 	}
 
 	return nil
 }
 
+func printStorageNodeBalances(cmd *cobra.Command, inv *invoker.Invoker, nmHash util.Uint160) error {
+	arr, err := unwrap.Array(inv.Call(nmHash, "netmap"))
+	if err != nil {
+		return errors.New("can't fetch the list of storage nodes")
+	}
+
+	snList := make([]accBalancePair, len(arr))
+	for i := range arr {
+		node, ok := arr[i].Value().([]stackitem.Item)
+		if !ok || len(node) == 0 {
+			return errors.New("can't parse the list of storage nodes")
+		}
+		bs, err := node[0].TryBytes()
+		if err != nil {
+			return errors.New("can't parse the list of storage nodes")
+		}
+		var ni netmap.NodeInfo
+		if err := ni.Unmarshal(bs); err != nil {
+			return fmt.Errorf("can't parse the list of storage nodes: %w", err)
+		}
+		pub, err := keys.NewPublicKeyFromBytes(ni.PublicKey(), elliptic.P256())
+		if err != nil {
+			return fmt.Errorf("can't parse storage node public key: %w", err)
+		}
+		snList[i].scriptHash = pub.GetScriptHash()
+	}
+
+	if err := fetchBalances(inv, gas.Hash, snList); err != nil {
+		return err
+	}
+
+	printBalances(cmd, "\nStorage node balances:", snList)
+	return nil
+}
+
+func printProxyContractBalance(cmd *cobra.Command, inv *invoker.Invoker, nnsHash util.Uint160) error {
+	h, err := nnsResolveHash(inv, nnsHash, proxyContract+".frostfs")
+	if err != nil {
+		return fmt.Errorf("can't get hash of the proxy contract: %w", err)
+	}
+
+	proxyList := []accBalancePair{{scriptHash: h}}
+	if err := fetchBalances(inv, gas.Hash, proxyList); err != nil {
+		return err
+	}
+
+	printBalances(cmd, "\nProxy contract balance:", proxyList)
+	return nil
+}
+
+func printAlphabetContractBalances(cmd *cobra.Command, c Client, inv *invoker.Invoker, count int, nnsHash util.Uint160) error {
+	alphaList := make([]accBalancePair, count)
+
+	w := io.NewBufBinWriter()
+	for i := range alphaList {
+		emit.AppCall(w.BinWriter, nnsHash, "resolve", callflag.ReadOnly,
+			getAlphabetNNSDomain(i),
+			int64(nns.TXT))
+	}
+	if w.Err != nil {
+		panic(w.Err)
+	}
+
+	alphaRes, err := c.InvokeScript(w.Bytes(), nil)
+	if err != nil {
+		return fmt.Errorf("can't fetch info from NNS: %w", err)
+	}
+
+	for i := range alphaList {
+		h, err := parseNNSResolveResult(alphaRes.Stack[i])
+		if err != nil {
+			return fmt.Errorf("can't fetch the alphabet contract #%d hash: %w", i, err)
+		}
+		alphaList[i].scriptHash = h
+	}
+
+	if err := fetchBalances(inv, gas.Hash, alphaList); err != nil {
+		return err
+	}
+
+	printBalances(cmd, "\nAlphabet contracts balances:", alphaList)
+	return nil
+}
+
 func fetchIRNodes(c Client, nmHash, desigHash util.Uint160) ([]accBalancePair, error) {
 	var irList []accBalancePair
 
diff --git a/pkg/local_object_storage/engine/tree.go b/pkg/local_object_storage/engine/tree.go
index 0d6f49eea..b69ab4890 100644
--- a/pkg/local_object_storage/engine/tree.go
+++ b/pkg/local_object_storage/engine/tree.go
@@ -51,17 +51,17 @@ func (e *StorageEngine) TreeAddByPath(d pilorama.CIDDescriptor, treeID string, a
 }
 
 // TreeApply implements the pilorama.Forest interface.
-func (e *StorageEngine) TreeApply(d pilorama.CIDDescriptor, treeID string, m *pilorama.Move, backgroundSync bool) error {
-	index, lst, err := e.getTreeShard(d.CID, treeID)
+func (e *StorageEngine) TreeApply(cnr cidSDK.ID, treeID string, m *pilorama.Move, backgroundSync bool) error {
+	index, lst, err := e.getTreeShard(cnr, treeID)
 	if err != nil && !errors.Is(err, pilorama.ErrTreeNotFound) {
 		return err
 	}
 
-	err = lst[index].TreeApply(d, treeID, m, backgroundSync)
+	err = lst[index].TreeApply(cnr, treeID, m, backgroundSync)
 	if err != nil {
 		if !errors.Is(err, shard.ErrReadOnlyMode) && err != shard.ErrPiloramaDisabled {
 			e.reportShardError(lst[index], "can't perform `TreeApply`", err,
-				zap.Stringer("cid", d.CID),
+				zap.Stringer("cid", cnr),
 				zap.String("tree", treeID))
 		}
 		return err
diff --git a/pkg/local_object_storage/metabase/lock.go b/pkg/local_object_storage/metabase/lock.go
index 65f9e669d..2e6bed936 100644
--- a/pkg/local_object_storage/metabase/lock.go
+++ b/pkg/local_object_storage/metabase/lock.go
@@ -138,57 +138,57 @@ func objectLocked(tx *bbolt.Tx, idCnr cid.ID, idObj oid.ID) bool {
 // Operation is very resource-intensive, which is caused by the admissibility
 // of multiple locks. Also, if we knew what objects are locked, it would be
 // possible to speed up the execution.
-//
-// nolint: gocognit
 func freePotentialLocks(tx *bbolt.Tx, idCnr cid.ID, locker oid.ID) error {
 	bucketLocked := tx.Bucket(bucketNameLocked)
-	if bucketLocked != nil {
-		key := make([]byte, cidSize)
-		idCnr.Encode(key)
+	if bucketLocked == nil {
+		return nil
+	}
 
-		bucketLockedContainer := bucketLocked.Bucket(key)
-		if bucketLockedContainer != nil {
-			keyLocker := objectKey(locker, key)
-			return bucketLockedContainer.ForEach(func(k, v []byte) error {
-				keyLockers, err := decodeList(v)
-				if err != nil {
-					return fmt.Errorf("decode list of lockers in locked bucket: %w", err)
-				}
+	key := make([]byte, cidSize)
+	idCnr.Encode(key)
 
-				for i := range keyLockers {
-					if bytes.Equal(keyLockers[i], keyLocker) {
-						if len(keyLockers) == 1 {
-							// locker was all alone
-							err = bucketLockedContainer.Delete(k)
-							if err != nil {
-								return fmt.Errorf("delete locked object record from locked bucket: %w", err)
-							}
-						} else {
-							// exclude locker
-							keyLockers = append(keyLockers[:i], keyLockers[i+1:]...)
+	bucketLockedContainer := bucketLocked.Bucket(key)
+	if bucketLockedContainer == nil {
+		return nil
+	}
 
-							v, err = encodeList(keyLockers)
-							if err != nil {
-								return fmt.Errorf("encode updated list of lockers: %w", err)
-							}
+	keyLocker := objectKey(locker, key)
+	return bucketLockedContainer.ForEach(func(k, v []byte) error {
+		keyLockers, err := decodeList(v)
+		if err != nil {
+			return fmt.Errorf("decode list of lockers in locked bucket: %w", err)
+		}
 
-							// update the record
-							err = bucketLockedContainer.Put(k, v)
-							if err != nil {
-								return fmt.Errorf("update list of lockers: %w", err)
-							}
-						}
+		for i := range keyLockers {
+			if bytes.Equal(keyLockers[i], keyLocker) {
+				if len(keyLockers) == 1 {
+					// locker was all alone
+					err = bucketLockedContainer.Delete(k)
+					if err != nil {
+						return fmt.Errorf("delete locked object record from locked bucket: %w", err)
+					}
+				} else {
+					// exclude locker
+					keyLockers = append(keyLockers[:i], keyLockers[i+1:]...)
 
-						return nil
+					v, err = encodeList(keyLockers)
+					if err != nil {
+						return fmt.Errorf("encode updated list of lockers: %w", err)
+					}
+
+					// update the record
+					err = bucketLockedContainer.Put(k, v)
+					if err != nil {
+						return fmt.Errorf("update list of lockers: %w", err)
 					}
 				}
 
 				return nil
-			})
+			}
 		}
-	}
 
-	return nil
+		return nil
+	})
 }
 
 // IsLockedPrm groups the parameters of IsLocked operation.
diff --git a/pkg/local_object_storage/pilorama/boltdb.go b/pkg/local_object_storage/pilorama/boltdb.go
index b47fa16e8..42dde8607 100644
--- a/pkg/local_object_storage/pilorama/boltdb.go
+++ b/pkg/local_object_storage/pilorama/boltdb.go
@@ -327,11 +327,7 @@ func (t *boltForest) findSpareID(bTree *bbolt.Bucket) uint64 {
 }
 
 // TreeApply implements the Forest interface.
-func (t *boltForest) TreeApply(d CIDDescriptor, treeID string, m *Move, backgroundSync bool) error {
-	if !d.checkValid() {
-		return ErrInvalidCIDDescriptor
-	}
-
+func (t *boltForest) TreeApply(cnr cidSDK.ID, treeID string, m *Move, backgroundSync bool) error {
 	t.modeMtx.RLock()
 	defer t.modeMtx.RUnlock()
 
@@ -344,7 +340,7 @@ func (t *boltForest) TreeApply(d CIDDescriptor, treeID string, m *Move, backgrou
 	if backgroundSync {
 		var seen bool
 		err := t.db.View(func(tx *bbolt.Tx) error {
-			treeRoot := tx.Bucket(bucketName(d.CID, treeID))
+			treeRoot := tx.Bucket(bucketName(cnr, treeID))
 			if treeRoot == nil {
 				return nil
 			}
@@ -362,7 +358,7 @@ func (t *boltForest) TreeApply(d CIDDescriptor, treeID string, m *Move, backgrou
 	}
 
 	if t.db.MaxBatchSize == 1 {
-		fullID := bucketName(d.CID, treeID)
+		fullID := bucketName(cnr, treeID)
 		return t.db.Update(func(tx *bbolt.Tx) error {
 			bLog, bTree, err := t.getTreeBuckets(tx, fullID)
 			if err != nil {
@@ -375,11 +371,11 @@ func (t *boltForest) TreeApply(d CIDDescriptor, treeID string, m *Move, backgrou
 	}
 
 	ch := make(chan error, 1)
-	t.addBatch(d, treeID, m, ch)
+	t.addBatch(cnr, treeID, m, ch)
 	return <-ch
 }
 
-func (t *boltForest) addBatch(d CIDDescriptor, treeID string, m *Move, ch chan error) {
+func (t *boltForest) addBatch(cnr cidSDK.ID, treeID string, m *Move, ch chan error) {
 	t.mtx.Lock()
 	for i := 0; i < len(t.batches); i++ {
 		t.batches[i].mtx.Lock()
@@ -391,7 +387,7 @@ func (t *boltForest) addBatch(d CIDDescriptor, treeID string, m *Move, ch chan e
 			continue
 		}
 
-		found := t.batches[i].cid.Equals(d.CID) && t.batches[i].treeID == treeID
+		found := t.batches[i].cid.Equals(cnr) && t.batches[i].treeID == treeID
 		if found {
 			t.batches[i].results = append(t.batches[i].results, ch)
 			t.batches[i].operations = append(t.batches[i].operations, m)
@@ -412,7 +408,7 @@ func (t *boltForest) addBatch(d CIDDescriptor, treeID string, m *Move, ch chan e
 	}
 	b := &batch{
 		forest:     t,
-		cid:        d.CID,
+		cid:        cnr,
 		treeID:     treeID,
 		results:    []chan<- error{ch},
 		operations: []*Move{m},
diff --git a/pkg/local_object_storage/pilorama/forest.go b/pkg/local_object_storage/pilorama/forest.go
index 743096c81..21209420a 100644
--- a/pkg/local_object_storage/pilorama/forest.go
+++ b/pkg/local_object_storage/pilorama/forest.go
@@ -5,6 +5,7 @@ import (
 	"strings"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/shard/mode"
+	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
 	cidSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
 )
 
@@ -93,12 +94,8 @@ func (f *memoryForest) TreeAddByPath(d CIDDescriptor, treeID string, attr string
 }
 
 // TreeApply implements the Forest interface.
-func (f *memoryForest) TreeApply(d CIDDescriptor, treeID string, op *Move, _ bool) error {
-	if !d.checkValid() {
-		return ErrInvalidCIDDescriptor
-	}
-
-	fullID := d.CID.String() + "/" + treeID
+func (f *memoryForest) TreeApply(cnr cid.ID, treeID string, op *Move, _ bool) error {
+	fullID := cnr.String() + "/" + treeID
 	s, ok := f.treeMap[fullID]
 	if !ok {
 		s = newState()
diff --git a/pkg/local_object_storage/pilorama/forest_test.go b/pkg/local_object_storage/pilorama/forest_test.go
index 9fe372b36..8e6f12717 100644
--- a/pkg/local_object_storage/pilorama/forest_test.go
+++ b/pkg/local_object_storage/pilorama/forest_test.go
@@ -411,21 +411,10 @@ func TestForest_Apply(t *testing.T) {
 
 func testForestTreeApply(t *testing.T, constructor func(t testing.TB, _ ...Option) Forest) {
 	cid := cidtest.ID()
-	d := CIDDescriptor{cid, 0, 1}
 	treeID := "version"
 
-	t.Run("invalid descriptor", func(t *testing.T) {
-		s := constructor(t)
-		err := s.TreeApply(CIDDescriptor{cid, 0, 0}, treeID, &Move{
-			Child:  10,
-			Parent: 0,
-			Meta:   Meta{Time: 1, Items: []KeyValue{{"grand", []byte{1}}}},
-		}, false)
-		require.ErrorIs(t, err, ErrInvalidCIDDescriptor)
-	})
-
 	testApply := func(t *testing.T, s Forest, child, parent Node, meta Meta) {
-		require.NoError(t, s.TreeApply(d, treeID, &Move{
+		require.NoError(t, s.TreeApply(cid, treeID, &Move{
 			Child:  child,
 			Parent: parent,
 			Meta:   meta,
@@ -465,7 +454,6 @@ func TestForest_GetOpLog(t *testing.T) {
 
 func testForestTreeGetOpLog(t *testing.T, constructor func(t testing.TB, _ ...Option) Forest) {
 	cid := cidtest.ID()
-	d := CIDDescriptor{cid, 0, 1}
 	treeID := "version"
 	logs := []Move{
 		{
@@ -491,7 +479,7 @@ func testForestTreeGetOpLog(t *testing.T, constructor func(t testing.TB, _ ...Op
 	})
 
 	for i := range logs {
-		require.NoError(t, s.TreeApply(d, treeID, &logs[i], false))
+		require.NoError(t, s.TreeApply(cid, treeID, &logs[i], false))
 	}
 
 	testGetOpLog := func(t *testing.T, height uint64, m Move) {
@@ -533,13 +521,12 @@ func testForestTreeExists(t *testing.T, constructor func(t testing.TB, opts ...O
 
 	cid := cidtest.ID()
 	treeID := "version"
-	d := CIDDescriptor{cid, 0, 1}
 
 	t.Run("empty state, no panic", func(t *testing.T) {
 		checkExists(t, false, cid, treeID)
 	})
 
-	require.NoError(t, s.TreeApply(d, treeID, &Move{Parent: 0, Child: 1}, false))
+	require.NoError(t, s.TreeApply(cid, treeID, &Move{Parent: 0, Child: 1}, false))
 	checkExists(t, true, cid, treeID)
 	checkExists(t, false, cidtest.ID(), treeID) // different CID, same tree
 	checkExists(t, false, cid, "another tree")  // same CID, different tree
@@ -570,16 +557,16 @@ func TestApplyTricky1(t *testing.T) {
 	}
 
 	treeID := "version"
-	d := CIDDescriptor{CID: cidtest.ID(), Position: 0, Size: 1}
+	cid := cidtest.ID()
 	for i := range providers {
 		t.Run(providers[i].name, func(t *testing.T) {
 			s := providers[i].construct(t)
 			for i := range ops {
-				require.NoError(t, s.TreeApply(d, treeID, &ops[i], false))
+				require.NoError(t, s.TreeApply(cid, treeID, &ops[i], false))
 			}
 
 			for i := range expected {
-				_, parent, err := s.TreeGetMeta(d.CID, treeID, expected[i].child)
+				_, parent, err := s.TreeGetMeta(cid, treeID, expected[i].child)
 				require.NoError(t, err)
 				require.Equal(t, expected[i].parent, parent)
 			}
@@ -631,16 +618,16 @@ func TestApplyTricky2(t *testing.T) {
 	}
 
 	treeID := "version"
-	d := CIDDescriptor{CID: cidtest.ID(), Position: 0, Size: 1}
+	cid := cidtest.ID()
 	for i := range providers {
 		t.Run(providers[i].name, func(t *testing.T) {
 			s := providers[i].construct(t)
 			for i := range ops {
-				require.NoError(t, s.TreeApply(d, treeID, &ops[i], false))
+				require.NoError(t, s.TreeApply(cid, treeID, &ops[i], false))
 			}
 
 			for i := range expected {
-				_, parent, err := s.TreeGetMeta(d.CID, treeID, expected[i].child)
+				_, parent, err := s.TreeGetMeta(cid, treeID, expected[i].child)
 				require.NoError(t, err)
 				require.Equal(t, expected[i].parent, parent)
 			}
@@ -746,12 +733,11 @@ func testForestTreeParallelApply(t *testing.T, constructor func(t testing.TB, _
 	ops := prepareRandomTree(nodeCount, opCount)
 
 	cid := cidtest.ID()
-	d := CIDDescriptor{cid, 0, 1}
 	treeID := "version"
 
 	expected := constructor(t)
 	for i := range ops {
-		require.NoError(t, expected.TreeApply(d, treeID, &ops[i], false))
+		require.NoError(t, expected.TreeApply(cid, treeID, &ops[i], false))
 	}
 
 	for i := 0; i < iterCount; i++ {
@@ -766,7 +752,7 @@ func testForestTreeParallelApply(t *testing.T, constructor func(t testing.TB, _
 			go func() {
 				defer wg.Done()
 				for op := range ch {
-					require.NoError(t, actual.TreeApply(d, treeID, op, false))
+					require.NoError(t, actual.TreeApply(cid, treeID, op, false))
 				}
 			}()
 		}
@@ -792,12 +778,11 @@ func testForestTreeApplyRandom(t *testing.T, constructor func(t testing.TB, _ ..
 	ops := prepareRandomTree(nodeCount, opCount)
 
 	cid := cidtest.ID()
-	d := CIDDescriptor{cid, 0, 1}
 	treeID := "version"
 
 	expected := constructor(t)
 	for i := range ops {
-		require.NoError(t, expected.TreeApply(d, treeID, &ops[i], false))
+		require.NoError(t, expected.TreeApply(cid, treeID, &ops[i], false))
 	}
 
 	const iterCount = 200
@@ -807,7 +792,7 @@ func testForestTreeApplyRandom(t *testing.T, constructor func(t testing.TB, _ ..
 
 		actual := constructor(t)
 		for i := range ops {
-			require.NoError(t, actual.TreeApply(d, treeID, &ops[i], false))
+			require.NoError(t, actual.TreeApply(cid, treeID, &ops[i], false))
 		}
 		compareForests(t, expected, actual, cid, treeID, nodeCount)
 	}
@@ -889,7 +874,6 @@ func benchmarkApply(b *testing.B, s Forest, genFunc func(int) []Move) {
 
 	ops := genFunc(b.N)
 	cid := cidtest.ID()
-	d := CIDDescriptor{cid, 0, 1}
 	treeID := "version"
 	ch := make(chan int, b.N)
 	for i := 0; i < b.N; i++ {
@@ -901,7 +885,7 @@ func benchmarkApply(b *testing.B, s Forest, genFunc func(int) []Move) {
 	b.SetParallelism(10)
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			if err := s.TreeApply(d, treeID, &ops[<-ch], false); err != nil {
+			if err := s.TreeApply(cid, treeID, &ops[<-ch], false); err != nil {
 				b.Fatalf("error in `Apply`: %v", err)
 			}
 		}
@@ -918,7 +902,6 @@ func TestTreeGetByPath(t *testing.T) {
 
 func testTreeGetByPath(t *testing.T, s Forest) {
 	cid := cidtest.ID()
-	d := CIDDescriptor{cid, 0, 1}
 	treeID := "version"
 
 	// /
@@ -928,12 +911,12 @@ func testTreeGetByPath(t *testing.T, s Forest) {
 	//    |- cat1.jpg, Version=XXX (4)
 	//    |- cat1.jpg, Version=YYY (5)
 	//    |- cat2.jpg, Version=ZZZ (6)
-	testMove(t, s, 0, 1, 0, d, treeID, "a", "")
-	testMove(t, s, 1, 2, 0, d, treeID, "b", "")
-	testMove(t, s, 2, 3, 1, d, treeID, "cat1.jpg", "TTT")
-	testMove(t, s, 3, 4, 2, d, treeID, "cat1.jpg", "XXX")
-	testMove(t, s, 4, 5, 2, d, treeID, "cat1.jpg", "YYY")
-	testMove(t, s, 5, 6, 2, d, treeID, "cat2.jpg", "ZZZ")
+	testMove(t, s, 0, 1, 0, cid, treeID, "a", "")
+	testMove(t, s, 1, 2, 0, cid, treeID, "b", "")
+	testMove(t, s, 2, 3, 1, cid, treeID, "cat1.jpg", "TTT")
+	testMove(t, s, 3, 4, 2, cid, treeID, "cat1.jpg", "XXX")
+	testMove(t, s, 4, 5, 2, cid, treeID, "cat1.jpg", "YYY")
+	testMove(t, s, 5, 6, 2, cid, treeID, "cat2.jpg", "ZZZ")
 
 	if mf, ok := s.(*memoryForest); ok {
 		single := mf.treeMap[cid.String()+"/"+treeID]
@@ -970,14 +953,14 @@ func testTreeGetByPath(t *testing.T, s Forest) {
 	})
 }
 
-func testMove(t *testing.T, s Forest, ts int, node, parent Node, d CIDDescriptor, treeID, filename, version string) {
+func testMove(t *testing.T, s Forest, ts int, node, parent Node, cid cidSDK.ID, treeID, filename, version string) {
 	items := make([]KeyValue, 1, 2)
 	items[0] = KeyValue{AttributeFilename, []byte(filename)}
 	if version != "" {
 		items = append(items, KeyValue{AttributeVersion, []byte(version)})
 	}
 
-	require.NoError(t, s.TreeApply(d, treeID, &Move{
+	require.NoError(t, s.TreeApply(cid, treeID, &Move{
 		Parent: parent,
 		Child:  node,
 		Meta: Meta{
diff --git a/pkg/local_object_storage/pilorama/interface.go b/pkg/local_object_storage/pilorama/interface.go
index c2143de24..290f633a5 100644
--- a/pkg/local_object_storage/pilorama/interface.go
+++ b/pkg/local_object_storage/pilorama/interface.go
@@ -18,7 +18,7 @@ type Forest interface {
 	TreeAddByPath(d CIDDescriptor, treeID string, attr string, path []string, meta []KeyValue) ([]Move, error)
 	// TreeApply applies replicated operation from another node.
 	// If background is true, TreeApply will first check whether an operation exists.
-	TreeApply(d CIDDescriptor, treeID string, m *Move, backgroundSync bool) error
+	TreeApply(cnr cidSDK.ID, treeID string, m *Move, backgroundSync bool) error
 	// TreeGetByPath returns all nodes corresponding to the path.
 	// The path is constructed by descending from the root using the values of the
 	// AttributeFilename in meta.
diff --git a/pkg/local_object_storage/shard/control.go b/pkg/local_object_storage/shard/control.go
index acf038d71..5aa7fbd3d 100644
--- a/pkg/local_object_storage/shard/control.go
+++ b/pkg/local_object_storage/shard/control.go
@@ -155,7 +155,6 @@ func (s *Shard) Init() error {
 	return nil
 }
 
-// nolint: funlen
 func (s *Shard) refillMetabase() error {
 	err := s.metaBase.Reset()
 	if err != nil {
@@ -172,57 +171,23 @@ func (s *Shard) refillMetabase() error {
 			return nil
 		}
 
-		// nolint: exhaustive
+		var err error
 		switch obj.Type() {
 		case objectSDK.TypeTombstone:
-			tombstone := objectSDK.NewTombstone()
-
-			if err := tombstone.Unmarshal(obj.Payload()); err != nil {
-				return fmt.Errorf("could not unmarshal tombstone content: %w", err)
-			}
-
-			tombAddr := object.AddressOf(obj)
-			memberIDs := tombstone.Members()
-			tombMembers := make([]oid.Address, 0, len(memberIDs))
-
-			for i := range memberIDs {
-				a := tombAddr
-				a.SetObject(memberIDs[i])
-
-				tombMembers = append(tombMembers, a)
-			}
-
-			var inhumePrm meta.InhumePrm
-
-			inhumePrm.SetTombstoneAddress(tombAddr)
-			inhumePrm.SetAddresses(tombMembers...)
-
-			_, err = s.metaBase.Inhume(inhumePrm)
-			if err != nil {
-				return fmt.Errorf("could not inhume objects: %w", err)
-			}
+			err = s.refillTombstoneObject(obj)
 		case objectSDK.TypeLock:
-			var lock objectSDK.Lock
-			if err := lock.Unmarshal(obj.Payload()); err != nil {
-				return fmt.Errorf("could not unmarshal lock content: %w", err)
-			}
-
-			locked := make([]oid.ID, lock.NumberOfMembers())
-			lock.ReadMembers(locked)
-
-			cnr, _ := obj.ContainerID()
-			id, _ := obj.ID()
-			err = s.metaBase.Lock(cnr, id, locked)
-			if err != nil {
-				return fmt.Errorf("could not lock objects: %w", err)
-			}
+			err = s.refillLockObject(obj)
+		default:
+		}
+		if err != nil {
+			return err
 		}
 
 		var mPrm meta.PutPrm
 		mPrm.SetObject(obj)
 		mPrm.SetStorageID(descriptor)
 
-		_, err := s.metaBase.Put(mPrm)
+		_, err = s.metaBase.Put(mPrm)
 		if err != nil && !meta.IsErrRemoved(err) && !errors.Is(err, meta.ErrObjectIsExpired) {
 			return err
 		}
@@ -241,6 +206,54 @@ func (s *Shard) refillMetabase() error {
 	return nil
 }
 
+func (s *Shard) refillLockObject(obj *objectSDK.Object) error {
+	var lock objectSDK.Lock
+	if err := lock.Unmarshal(obj.Payload()); err != nil {
+		return fmt.Errorf("could not unmarshal lock content: %w", err)
+	}
+
+	locked := make([]oid.ID, lock.NumberOfMembers())
+	lock.ReadMembers(locked)
+
+	cnr, _ := obj.ContainerID()
+	id, _ := obj.ID()
+	err := s.metaBase.Lock(cnr, id, locked)
+	if err != nil {
+		return fmt.Errorf("could not lock objects: %w", err)
+	}
+	return nil
+}
+
+func (s *Shard) refillTombstoneObject(obj *objectSDK.Object) error {
+	tombstone := objectSDK.NewTombstone()
+
+	if err := tombstone.Unmarshal(obj.Payload()); err != nil {
+		return fmt.Errorf("could not unmarshal tombstone content: %w", err)
+	}
+
+	tombAddr := object.AddressOf(obj)
+	memberIDs := tombstone.Members()
+	tombMembers := make([]oid.Address, 0, len(memberIDs))
+
+	for i := range memberIDs {
+		a := tombAddr
+		a.SetObject(memberIDs[i])
+
+		tombMembers = append(tombMembers, a)
+	}
+
+	var inhumePrm meta.InhumePrm
+
+	inhumePrm.SetTombstoneAddress(tombAddr)
+	inhumePrm.SetAddresses(tombMembers...)
+
+	_, err := s.metaBase.Inhume(inhumePrm)
+	if err != nil {
+		return fmt.Errorf("could not inhume objects: %w", err)
+	}
+	return nil
+}
+
 // Close releases all Shard's components.
 func (s *Shard) Close() error {
 	components := []interface{ Close() error }{}
diff --git a/pkg/local_object_storage/shard/tree.go b/pkg/local_object_storage/shard/tree.go
index b9f909997..684c92e66 100644
--- a/pkg/local_object_storage/shard/tree.go
+++ b/pkg/local_object_storage/shard/tree.go
@@ -42,7 +42,7 @@ func (s *Shard) TreeAddByPath(d pilorama.CIDDescriptor, treeID string, attr stri
 }
 
 // TreeApply implements the pilorama.Forest interface.
-func (s *Shard) TreeApply(d pilorama.CIDDescriptor, treeID string, m *pilorama.Move, backgroundSync bool) error {
+func (s *Shard) TreeApply(cnr cidSDK.ID, treeID string, m *pilorama.Move, backgroundSync bool) error {
 	if s.pilorama == nil {
 		return ErrPiloramaDisabled
 	}
@@ -53,7 +53,7 @@ func (s *Shard) TreeApply(d pilorama.CIDDescriptor, treeID string, m *pilorama.M
 	if s.info.Mode.ReadOnly() {
 		return ErrReadOnlyMode
 	}
-	return s.pilorama.TreeApply(d, treeID, m, backgroundSync)
+	return s.pilorama.TreeApply(cnr, treeID, m, backgroundSync)
 }
 
 // TreeGetByPath implements the pilorama.Forest interface.
diff --git a/pkg/services/object/get/v2/util.go b/pkg/services/object/get/v2/util.go
index e35cece36..a871714a1 100644
--- a/pkg/services/object/get/v2/util.go
+++ b/pkg/services/object/get/v2/util.go
@@ -426,7 +426,7 @@ func (w *headResponseWriter) WriteHeader(_ context.Context, hdr *object.Object)
 	return nil
 }
 
-// nolint: funlen, gocognit
+// nolint: funlen
 func (s *Service) toHeadPrm(ctx context.Context, req *objectV2.HeadRequest, resp *objectV2.HeadResponse) (*getsvc.HeadPrm, error) {
 	body := req.GetBody()
 
@@ -459,138 +459,140 @@ func (s *Service) toHeadPrm(ctx context.Context, req *objectV2.HeadRequest, resp
 		body:     resp.GetBody(),
 	})
 
-	if !commonPrm.LocalOnly() {
-		var onceResign sync.Once
-
-		p.SetRequestForwarder(groupAddressRequestForwarder(func(addr network.Address, c client.MultiAddressClient, pubkey []byte) (*object.Object, error) {
-			var err error
-
-			key, err := s.keyStorage.GetKey(nil)
-			if err != nil {
-				return nil, err
-			}
-
-			// once compose and resign forwarding request
-			onceResign.Do(func() {
-				// compose meta header of the local server
-				metaHdr := new(session.RequestMetaHeader)
-				metaHdr.SetTTL(meta.GetTTL() - 1)
-				// TODO: #1165 think how to set the other fields
-				metaHdr.SetOrigin(meta)
-				writeCurrentVersion(metaHdr)
-
-				req.SetMetaHeader(metaHdr)
-
-				err = signature.SignServiceMessage(key, req)
-			})
-
-			if err != nil {
-				return nil, err
-			}
-
-			// code below is copy-pasted from c.GetObjectHeader implementation,
-			// perhaps it is worth highlighting the utility function in frostfs-api-go
-
-			// send Head request
-			var headResp *objectV2.HeadResponse
-			err = c.RawForAddress(addr, func(cli *rpcclient.Client) error {
-				headResp, err = rpc.HeadObject(cli, req, rpcclient.WithContext(ctx))
-				return err
-			})
-			if err != nil {
-				return nil, fmt.Errorf("sending the request failed: %w", err)
-			}
-
-			// verify response key
-			if err = internal.VerifyResponseKeyV2(pubkey, headResp); err != nil {
-				return nil, err
-			}
-
-			// verify response structure
-			if err := signature.VerifyServiceMessage(headResp); err != nil {
-				return nil, fmt.Errorf("response verification failed: %w", err)
-			}
-
-			if err = checkStatus(resp.GetMetaHeader().GetStatus()); err != nil {
-				return nil, err
-			}
-
-			var (
-				hdr   *objectV2.Header
-				idSig *refs.Signature
-			)
-
-			switch v := headResp.GetBody().GetHeaderPart().(type) {
-			case nil:
-				return nil, fmt.Errorf("unexpected header type %T", v)
-			case *objectV2.ShortHeader:
-				if !body.GetMainOnly() {
-					return nil, fmt.Errorf("wrong header part type: expected %T, received %T",
-						(*objectV2.ShortHeader)(nil), (*objectV2.HeaderWithSignature)(nil),
-					)
-				}
-
-				h := v
-
-				hdr = new(objectV2.Header)
-				hdr.SetPayloadLength(h.GetPayloadLength())
-				hdr.SetVersion(h.GetVersion())
-				hdr.SetOwnerID(h.GetOwnerID())
-				hdr.SetObjectType(h.GetObjectType())
-				hdr.SetCreationEpoch(h.GetCreationEpoch())
-				hdr.SetPayloadHash(h.GetPayloadHash())
-				hdr.SetHomomorphicHash(h.GetHomomorphicHash())
-			case *objectV2.HeaderWithSignature:
-				if body.GetMainOnly() {
-					return nil, fmt.Errorf("wrong header part type: expected %T, received %T",
-						(*objectV2.HeaderWithSignature)(nil), (*objectV2.ShortHeader)(nil),
-					)
-				}
-
-				hdrWithSig := v
-				if hdrWithSig == nil {
-					return nil, errors.New("nil object part")
-				}
-
-				hdr = hdrWithSig.GetHeader()
-				idSig = hdrWithSig.GetSignature()
-
-				if idSig == nil {
-					// TODO(@cthulhu-rider): #1387 use "const" error
-					return nil, errors.New("missing signature")
-				}
-
-				binID, err := objAddr.Object().Marshal()
-				if err != nil {
-					return nil, fmt.Errorf("marshal ID: %w", err)
-				}
-
-				var sig frostfscrypto.Signature
-				if err := sig.ReadFromV2(*idSig); err != nil {
-					return nil, fmt.Errorf("can't read signature: %w", err)
-				}
-
-				if !sig.Verify(binID) {
-					return nil, errors.New("invalid object ID signature")
-				}
-			case *objectV2.SplitInfo:
-				si := object.NewSplitInfoFromV2(v)
-
-				return nil, object.NewSplitInfoError(si)
-			}
-
-			objv2 := new(objectV2.Object)
-			objv2.SetHeader(hdr)
-			objv2.SetSignature(idSig)
-
-			obj := object.NewFromV2(objv2)
-			obj.SetID(objAddr.Object())
-
-			// convert the object
-			return obj, nil
-		}))
+	if commonPrm.LocalOnly() {
+		return p, nil
 	}
 
+	var onceResign sync.Once
+
+	p.SetRequestForwarder(groupAddressRequestForwarder(func(addr network.Address, c client.MultiAddressClient, pubkey []byte) (*object.Object, error) {
+		var err error
+
+		key, err := s.keyStorage.GetKey(nil)
+		if err != nil {
+			return nil, err
+		}
+
+		// once compose and resign forwarding request
+		onceResign.Do(func() {
+			// compose meta header of the local server
+			metaHdr := new(session.RequestMetaHeader)
+			metaHdr.SetTTL(meta.GetTTL() - 1)
+			// TODO: #1165 think how to set the other fields
+			metaHdr.SetOrigin(meta)
+			writeCurrentVersion(metaHdr)
+
+			req.SetMetaHeader(metaHdr)
+
+			err = signature.SignServiceMessage(key, req)
+		})
+
+		if err != nil {
+			return nil, err
+		}
+
+		// code below is copy-pasted from c.GetObjectHeader implementation,
+		// perhaps it is worth highlighting the utility function in frostfs-api-go
+
+		// send Head request
+		var headResp *objectV2.HeadResponse
+		err = c.RawForAddress(addr, func(cli *rpcclient.Client) error {
+			headResp, err = rpc.HeadObject(cli, req, rpcclient.WithContext(ctx))
+			return err
+		})
+		if err != nil {
+			return nil, fmt.Errorf("sending the request failed: %w", err)
+		}
+
+		// verify response key
+		if err = internal.VerifyResponseKeyV2(pubkey, headResp); err != nil {
+			return nil, err
+		}
+
+		// verify response structure
+		if err := signature.VerifyServiceMessage(headResp); err != nil {
+			return nil, fmt.Errorf("response verification failed: %w", err)
+		}
+
+		if err = checkStatus(resp.GetMetaHeader().GetStatus()); err != nil {
+			return nil, err
+		}
+
+		var (
+			hdr   *objectV2.Header
+			idSig *refs.Signature
+		)
+
+		switch v := headResp.GetBody().GetHeaderPart().(type) {
+		case nil:
+			return nil, fmt.Errorf("unexpected header type %T", v)
+		case *objectV2.ShortHeader:
+			if !body.GetMainOnly() {
+				return nil, fmt.Errorf("wrong header part type: expected %T, received %T",
+					(*objectV2.ShortHeader)(nil), (*objectV2.HeaderWithSignature)(nil),
+				)
+			}
+
+			h := v
+
+			hdr = new(objectV2.Header)
+			hdr.SetPayloadLength(h.GetPayloadLength())
+			hdr.SetVersion(h.GetVersion())
+			hdr.SetOwnerID(h.GetOwnerID())
+			hdr.SetObjectType(h.GetObjectType())
+			hdr.SetCreationEpoch(h.GetCreationEpoch())
+			hdr.SetPayloadHash(h.GetPayloadHash())
+			hdr.SetHomomorphicHash(h.GetHomomorphicHash())
+		case *objectV2.HeaderWithSignature:
+			if body.GetMainOnly() {
+				return nil, fmt.Errorf("wrong header part type: expected %T, received %T",
+					(*objectV2.HeaderWithSignature)(nil), (*objectV2.ShortHeader)(nil),
+				)
+			}
+
+			hdrWithSig := v
+			if hdrWithSig == nil {
+				return nil, errors.New("nil object part")
+			}
+
+			hdr = hdrWithSig.GetHeader()
+			idSig = hdrWithSig.GetSignature()
+
+			if idSig == nil {
+				// TODO(@cthulhu-rider): #1387 use "const" error
+				return nil, errors.New("missing signature")
+			}
+
+			binID, err := objAddr.Object().Marshal()
+			if err != nil {
+				return nil, fmt.Errorf("marshal ID: %w", err)
+			}
+
+			var sig frostfscrypto.Signature
+			if err := sig.ReadFromV2(*idSig); err != nil {
+				return nil, fmt.Errorf("can't read signature: %w", err)
+			}
+
+			if !sig.Verify(binID) {
+				return nil, errors.New("invalid object ID signature")
+			}
+		case *objectV2.SplitInfo:
+			si := object.NewSplitInfoFromV2(v)
+
+			return nil, object.NewSplitInfoError(si)
+		}
+
+		objv2 := new(objectV2.Object)
+		objv2.SetHeader(hdr)
+		objv2.SetSignature(idSig)
+
+		obj := object.NewFromV2(objv2)
+		obj.SetID(objAddr.Object())
+
+		// convert the object
+		return obj, nil
+	}))
+
 	return p, nil
 }
 
diff --git a/pkg/services/tree/replicator.go b/pkg/services/tree/replicator.go
index 01bd2debd..bb20310b2 100644
--- a/pkg/services/tree/replicator.go
+++ b/pkg/services/tree/replicator.go
@@ -27,7 +27,7 @@ type replicationTask struct {
 
 type applyOp struct {
 	treeID string
-	pilorama.CIDDescriptor
+	cid    cidSDK.ID
 	pilorama.Move
 }
 
@@ -43,7 +43,7 @@ func (s *Service) localReplicationWorker() {
 		case <-s.closeCh:
 			return
 		case op := <-s.replicateLocalCh:
-			err := s.forest.TreeApply(op.CIDDescriptor, op.treeID, &op.Move, false)
+			err := s.forest.TreeApply(op.cid, op.treeID, &op.Move, false)
 			if err != nil {
 				s.log.Error("failed to apply replicated operation",
 					zap.String("err", err.Error()))
@@ -52,7 +52,7 @@ func (s *Service) localReplicationWorker() {
 	}
 }
 
-func (s *Service) replicationWorker() {
+func (s *Service) replicationWorker(ctx context.Context) {
 	for {
 		select {
 		case <-s.closeCh:
@@ -64,13 +64,13 @@ func (s *Service) replicationWorker() {
 			task.n.IterateNetworkEndpoints(func(addr string) bool {
 				lastAddr = addr
 
-				c, err := s.cache.get(context.Background(), addr)
+				c, err := s.cache.get(ctx, addr)
 				if err != nil {
 					lastErr = fmt.Errorf("can't create client: %w", err)
 					return false
 				}
 
-				ctx, cancel := context.WithTimeout(context.Background(), s.replicatorTimeout)
+				ctx, cancel := context.WithTimeout(ctx, s.replicatorTimeout)
 				_, lastErr = c.Apply(ctx, task.req)
 				cancel()
 
@@ -94,8 +94,7 @@ func (s *Service) replicationWorker() {
 
 func (s *Service) replicateLoop(ctx context.Context) {
 	for i := 0; i < s.replicatorWorkerCount; i++ {
-		//nolint: contextcheck
-		go s.replicationWorker()
+		go s.replicationWorker(ctx)
 		go s.localReplicationWorker()
 	}
 	defer func() {
diff --git a/pkg/services/tree/service.go b/pkg/services/tree/service.go
index 3176858e2..edea450f1 100644
--- a/pkg/services/tree/service.go
+++ b/pkg/services/tree/service.go
@@ -468,7 +468,7 @@ func (s *Service) Apply(_ context.Context, req *ApplyRequest) (*ApplyResponse, e
 
 	key := req.GetSignature().GetKey()
 
-	_, pos, size, err := s.getContainerInfo(cid, key)
+	_, pos, _, err := s.getContainerInfo(cid, key)
 	if err != nil {
 		return nil, err
 	}
@@ -485,8 +485,8 @@ func (s *Service) Apply(_ context.Context, req *ApplyRequest) (*ApplyResponse, e
 
 	select {
 	case s.replicateLocalCh <- applyOp{
-		treeID:        req.GetBody().GetTreeId(),
-		CIDDescriptor: pilorama.CIDDescriptor{CID: cid, Position: pos, Size: size},
+		treeID: req.GetBody().GetTreeId(),
+		cid:    cid,
 		Move: pilorama.Move{
 			Parent: op.GetParentId(),
 			Child:  op.GetChildId(),
diff --git a/pkg/services/tree/sync.go b/pkg/services/tree/sync.go
index abd683b77..d4ef7df5d 100644
--- a/pkg/services/tree/sync.go
+++ b/pkg/services/tree/sync.go
@@ -14,6 +14,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/client/netmap"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/network"
 	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
+	cidSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
 	netmapSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
 	"github.com/panjf2000/ants/v2"
 	"go.uber.org/zap"
@@ -40,11 +41,6 @@ func (s *Service) synchronizeAllTrees(ctx context.Context, cid cid.ID) error {
 		return ErrNotInContainer
 	}
 
-	var d pilorama.CIDDescriptor
-	d.CID = cid
-	d.Position = pos
-	d.Size = len(nodes)
-
 	nodes = randomizeNodeOrder(nodes, pos)
 	if len(nodes) == 0 {
 		return nil
@@ -87,18 +83,18 @@ func (s *Service) synchronizeAllTrees(ctx context.Context, cid cid.ID) error {
 	}
 
 	for _, tid := range treesToSync {
-		h, err := s.forest.TreeLastSyncHeight(d.CID, tid)
+		h, err := s.forest.TreeLastSyncHeight(cid, tid)
 		if err != nil && !errors.Is(err, pilorama.ErrTreeNotFound) {
 			s.log.Warn("could not get last synchronized height for a tree",
-				zap.Stringer("cid", d.CID),
+				zap.Stringer("cid", cid),
 				zap.String("tree", tid))
 			continue
 		}
-		newHeight := s.synchronizeTree(ctx, d, h, tid, nodes)
+		newHeight := s.synchronizeTree(ctx, cid, h, tid, nodes)
 		if h < newHeight {
-			if err := s.forest.TreeUpdateLastSyncHeight(d.CID, tid, newHeight); err != nil {
+			if err := s.forest.TreeUpdateLastSyncHeight(cid, tid, newHeight); err != nil {
 				s.log.Warn("could not update last synchronized height for a tree",
-					zap.Stringer("cid", d.CID),
+					zap.Stringer("cid", cid),
 					zap.String("tree", tid))
 			}
 		}
@@ -118,24 +114,19 @@ func (s *Service) SynchronizeTree(ctx context.Context, cid cid.ID, treeID string
 		return ErrNotInContainer
 	}
 
-	var d pilorama.CIDDescriptor
-	d.CID = cid
-	d.Position = pos
-	d.Size = len(nodes)
-
 	nodes = randomizeNodeOrder(nodes, pos)
 	if len(nodes) == 0 {
 		return nil
 	}
 
-	s.synchronizeTree(ctx, d, 0, treeID, nodes)
+	s.synchronizeTree(ctx, cid, 0, treeID, nodes)
 	return nil
 }
 
-func (s *Service) synchronizeTree(ctx context.Context, d pilorama.CIDDescriptor, from uint64,
+func (s *Service) synchronizeTree(ctx context.Context, cid cidSDK.ID, from uint64,
 	treeID string, nodes []netmapSDK.NodeInfo) uint64 {
 	s.log.Debug("synchronize tree",
-		zap.Stringer("cid", d.CID),
+		zap.Stringer("cid", cid),
 		zap.String("tree", treeID),
 		zap.Uint64("from", from))
 
@@ -157,7 +148,7 @@ func (s *Service) synchronizeTree(ctx context.Context, d pilorama.CIDDescriptor,
 
 			treeClient := NewTreeServiceClient(cc)
 			for {
-				h, err := s.synchronizeSingle(ctx, d, treeID, height, treeClient)
+				h, err := s.synchronizeSingle(ctx, cid, treeID, height, treeClient)
 				if height < h {
 					height = h
 				}
@@ -179,9 +170,9 @@ func (s *Service) synchronizeTree(ctx context.Context, d pilorama.CIDDescriptor,
 	return newHeight
 }
 
-func (s *Service) synchronizeSingle(ctx context.Context, d pilorama.CIDDescriptor, treeID string, height uint64, treeClient TreeServiceClient) (uint64, error) {
+func (s *Service) synchronizeSingle(ctx context.Context, cid cidSDK.ID, treeID string, height uint64, treeClient TreeServiceClient) (uint64, error) {
 	rawCID := make([]byte, sha256.Size)
-	d.CID.Encode(rawCID)
+	cid.Encode(rawCID)
 
 	for {
 		newHeight := height
@@ -211,7 +202,7 @@ func (s *Service) synchronizeSingle(ctx context.Context, d pilorama.CIDDescripto
 			if err := m.Meta.FromBytes(lm.Meta); err != nil {
 				return newHeight, err
 			}
-			if err := s.forest.TreeApply(d, treeID, m, true); err != nil {
+			if err := s.forest.TreeApply(cid, treeID, m, true); err != nil {
 				return newHeight, err
 			}
 			if m.Time > newHeight {
@@ -255,7 +246,6 @@ func (s *Service) SynchronizeAll() error {
 	}
 }
 
-// nolint: funlen, gocognit
 func (s *Service) syncLoop(ctx context.Context) {
 	for {
 		select {
@@ -272,86 +262,99 @@ func (s *Service) syncLoop(ctx context.Context) {
 				continue
 			}
 
-			newMap := make(map[cid.ID]struct{}, len(s.cnrMap))
-			cnrsToSync := make([]cid.ID, 0, len(cnrs))
+			newMap, cnrsToSync := s.containersToSync(cnrs)
 
-			var removed []cid.ID
-			for _, cnr := range cnrs {
-				_, pos, err := s.getContainerNodes(cnr)
-				if err != nil {
-					s.log.Error("could not calculate container nodes",
-						zap.Stringer("cid", cnr),
-						zap.Error(err))
-					continue
-				}
+			s.syncContainers(ctx, cnrsToSync)
 
-				if pos < 0 {
-					// node is not included in the container.
-					continue
-				}
-
-				newMap[cnr] = struct{}{}
-				cnrsToSync = append(cnrsToSync, cnr)
-			}
-
-			// sync new containers
-			var wg sync.WaitGroup
-			for _, cnr := range cnrsToSync {
-				wg.Add(1)
-				cnr := cnr
-				err := s.syncPool.Submit(func() {
-					defer wg.Done()
-					s.log.Debug("syncing container trees...", zap.Stringer("cid", cnr))
-
-					err := s.synchronizeAllTrees(ctx, cnr)
-					if err != nil {
-						s.log.Error("could not sync trees", zap.Stringer("cid", cnr), zap.Error(err))
-						return
-					}
-
-					s.log.Debug("container trees have been synced", zap.Stringer("cid", cnr))
-				})
-				if err != nil {
-					wg.Done()
-					s.log.Error("could not query trees for synchronization",
-						zap.Stringer("cid", cnr),
-						zap.Error(err))
-					if errors.Is(err, ants.ErrPoolClosed) {
-						return
-					}
-				}
-			}
-			wg.Wait()
-
-			s.cnrMapMtx.Lock()
-			for cnr := range s.cnrMap {
-				if _, ok := newMap[cnr]; ok {
-					continue
-				}
-				removed = append(removed, cnr)
-			}
-			for i := range removed {
-				delete(s.cnrMap, removed[i])
-			}
-			s.cnrMapMtx.Unlock()
-
-			for _, cnr := range removed {
-				s.log.Debug("removing redundant trees...", zap.Stringer("cid", cnr))
-
-				err = s.DropTree(ctx, cnr, "")
-				if err != nil {
-					s.log.Error("could not remove redundant tree",
-						zap.Stringer("cid", cnr),
-						zap.Error(err))
-					continue
-				}
-			}
+			s.removeContainers(ctx, newMap)
 
 			s.log.Debug("trees have been synchronized")
 		}
 	}
 }
 
+func (s *Service) syncContainers(ctx context.Context, cnrs []cid.ID) {
+	// sync new containers
+	var wg sync.WaitGroup
+	for _, cnr := range cnrs {
+		wg.Add(1)
+		cnr := cnr
+		err := s.syncPool.Submit(func() {
+			defer wg.Done()
+			s.log.Debug("syncing container trees...", zap.Stringer("cid", cnr))
+
+			err := s.synchronizeAllTrees(ctx, cnr)
+			if err != nil {
+				s.log.Error("could not sync trees", zap.Stringer("cid", cnr), zap.Error(err))
+				return
+			}
+
+			s.log.Debug("container trees have been synced", zap.Stringer("cid", cnr))
+		})
+		if err != nil {
+			wg.Done()
+			s.log.Error("could not query trees for synchronization",
+				zap.Stringer("cid", cnr),
+				zap.Error(err))
+			if errors.Is(err, ants.ErrPoolClosed) {
+				return
+			}
+		}
+	}
+	wg.Wait()
+}
+
+func (s *Service) removeContainers(ctx context.Context, newContainers map[cid.ID]struct{}) {
+	s.cnrMapMtx.Lock()
+	defer s.cnrMapMtx.Unlock()
+
+	var removed []cid.ID
+	for cnr := range s.cnrMap {
+		if _, ok := newContainers[cnr]; ok {
+			continue
+		}
+		removed = append(removed, cnr)
+	}
+	for i := range removed {
+		delete(s.cnrMap, removed[i])
+	}
+
+	for _, cnr := range removed {
+		s.log.Debug("removing redundant trees...", zap.Stringer("cid", cnr))
+
+		err := s.DropTree(ctx, cnr, "")
+		if err != nil {
+			s.log.Error("could not remove redundant tree",
+				zap.Stringer("cid", cnr),
+				zap.Error(err))
+		}
+	}
+}
+
+func (s *Service) containersToSync(cnrs []cid.ID) (map[cid.ID]struct{}, []cid.ID) {
+	newMap := make(map[cid.ID]struct{}, len(s.cnrMap))
+	cnrsToSync := make([]cid.ID, 0, len(cnrs))
+
+	for _, cnr := range cnrs {
+		_, pos, err := s.getContainerNodes(cnr)
+		if err != nil {
+			s.log.Error("could not calculate container nodes",
+				zap.Stringer("cid", cnr),
+				zap.Error(err))
+			continue
+		}
+
+		if pos < 0 {
+			// node is not included in the container.
+			continue
+		}
+
+		newMap[cnr] = struct{}{}
+		cnrsToSync = append(cnrsToSync, cnr)
+	}
+	return newMap, cnrsToSync
+}
+
 // randomizeNodeOrder shuffles nodes and removes not a `pos` index.
 // It is assumed that 0 <= pos < len(nodes).
 func randomizeNodeOrder(cnrNodes []netmap.NodeInfo, pos int) []netmap.NodeInfo {