From 26b4a258e0ab0d8f8272f90da37ecb8302f69370 Mon Sep 17 00:00:00 2001
From: Evgenii Stratonikov <evgeniy@nspcc.ru>
Date: Mon, 11 Jul 2022 15:34:17 +0300
Subject: [PATCH] [#1523] neofs-node: Refactor configuration

1. Move compression parameters to the `shard` section.
2. Allow to use multiple sub-storage components in the blobstor.

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
---
 cmd/neofs-node/config.go                      |  59 ++++++--
 cmd/neofs-node/config/engine/config.go        |   2 +-
 cmd/neofs-node/config/engine/config_test.go   |  38 +++--
 .../shard/blobstor/blobovnicza/config.go      |   5 +
 .../config/engine/shard/blobstor/config.go    | 122 +++------------
 .../engine/shard/blobstor/fstree/config.go    |  40 +++++
 .../engine/shard/blobstor/storage/config.go   |  55 +++++++
 cmd/neofs-node/config/engine/shard/config.go  |  38 +++++
 config/example/node.env                       |  47 +++---
 config/example/node.json                      |  50 ++++---
 config/example/node.yaml                      |  34 +++--
 .../blobstor/blobovniczatree/blobovnicza.go   |   8 +-
 .../blobstor/blobovniczatree/control.go       |  14 --
 .../blobstor/blobovniczatree/option.go        |   7 -
 pkg/local_object_storage/blobstor/blobstor.go | 139 ++----------------
 .../blobstor/blobstor_test.go                 |  49 ++++--
 .../blobstor/common/storage.go                |   3 +
 pkg/local_object_storage/blobstor/control.go  |   9 ++
 pkg/local_object_storage/blobstor/delete.go   |   2 +-
 .../blobstor/exists_test.go                   |   7 +-
 .../blobstor/fstree/control.go                |   8 +-
 .../blobstor/fstree/fstree.go                 |  22 +++
 .../blobstor/fstree/option.go                 |  31 ++++
 pkg/local_object_storage/blobstor/get.go      |   2 +-
 .../blobstor/get_range.go                     |   2 +-
 pkg/local_object_storage/blobstor/info.go     |   7 +-
 pkg/local_object_storage/blobstor/iterate.go  |   2 +-
 .../blobstor/iterate_test.go                  |   5 +-
 pkg/local_object_storage/blobstor/put.go      |   2 +-
 .../engine/engine_test.go                     |  37 +++--
 pkg/local_object_storage/engine/error_test.go |   7 +-
 .../shard/control_test.go                     |  37 +++--
 pkg/local_object_storage/shard/dump_test.go   |  42 ++++--
 pkg/local_object_storage/shard/lock_test.go   |  22 ++-
 pkg/local_object_storage/shard/range_test.go  |  21 ++-
 pkg/local_object_storage/shard/shard_test.go  |  38 +++--
 pkg/local_object_storage/writecache/mode.go   |   1 -
 37 files changed, 595 insertions(+), 419 deletions(-)
 create mode 100644 cmd/neofs-node/config/engine/shard/blobstor/fstree/config.go
 create mode 100644 cmd/neofs-node/config/engine/shard/blobstor/storage/config.go
 create mode 100644 pkg/local_object_storage/blobstor/fstree/option.go

diff --git a/cmd/neofs-node/config.go b/cmd/neofs-node/config.go
index 0cc276b3..dc9c29bf 100644
--- a/cmd/neofs-node/config.go
+++ b/cmd/neofs-node/config.go
@@ -15,6 +15,8 @@ import (
 	contractsconfig "github.com/nspcc-dev/neofs-node/cmd/neofs-node/config/contracts"
 	engineconfig "github.com/nspcc-dev/neofs-node/cmd/neofs-node/config/engine"
 	shardconfig "github.com/nspcc-dev/neofs-node/cmd/neofs-node/config/engine/shard"
+	blobovniczaconfig "github.com/nspcc-dev/neofs-node/cmd/neofs-node/config/engine/shard/blobstor/blobovnicza"
+	fstreeconfig "github.com/nspcc-dev/neofs-node/cmd/neofs-node/config/engine/shard/blobstor/fstree"
 	loggerconfig "github.com/nspcc-dev/neofs-node/cmd/neofs-node/config/logger"
 	metricsconfig "github.com/nspcc-dev/neofs-node/cmd/neofs-node/config/metrics"
 	nodeconfig "github.com/nspcc-dev/neofs-node/cmd/neofs-node/config/node"
@@ -22,6 +24,8 @@ import (
 	"github.com/nspcc-dev/neofs-node/pkg/core/container"
 	netmapCore "github.com/nspcc-dev/neofs-node/pkg/core/netmap"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor"
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/blobovniczatree"
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/fstree"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/engine"
 	meta "github.com/nspcc-dev/neofs-node/pkg/local_object_storage/metabase"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/pilorama"
@@ -47,6 +51,7 @@ import (
 	"github.com/nspcc-dev/neofs-node/pkg/util/logger"
 	"github.com/nspcc-dev/neofs-node/pkg/util/state"
 	"github.com/nspcc-dev/neofs-sdk-go/netmap"
+	objectSDK "github.com/nspcc-dev/neofs-sdk-go/object"
 	"github.com/nspcc-dev/neofs-sdk-go/user"
 	"github.com/nspcc-dev/neofs-sdk-go/version"
 	"github.com/panjf2000/ants/v2"
@@ -418,7 +423,7 @@ func initShardOptions(c *cfg) {
 		}
 
 		blobStorCfg := sc.BlobStor()
-		blobovniczaCfg := blobStorCfg.Blobovnicza()
+		storages := blobStorCfg.Storages()
 		metabaseCfg := sc.Metabase()
 		gcCfg := sc.GC()
 
@@ -426,19 +431,47 @@ func initShardOptions(c *cfg) {
 
 		piloramaCfg := sc.Pilorama()
 		if config.BoolSafe(c.appCfg.Sub("tree"), "enabled") {
-			piloramaPath := piloramaCfg.Path()
-			if piloramaPath == "" {
-				piloramaPath = filepath.Join(blobStorCfg.Path(), "pilorama.db")
-			}
-
 			piloramaOpts = []pilorama.Option{
-				pilorama.WithPath(piloramaPath),
+				pilorama.WithPath(piloramaCfg.Path()),
 				pilorama.WithPerm(piloramaCfg.Perm()),
 				pilorama.WithNoSync(piloramaCfg.NoSync()),
 				pilorama.WithMaxBatchSize(piloramaCfg.MaxBatchSize()),
 				pilorama.WithMaxBatchDelay(piloramaCfg.MaxBatchDelay())}
 		}
 
+		var st []blobstor.SubStorage
+		for i := range storages {
+			switch storages[i].Type() {
+			case "blobovniczas":
+				sub := blobovniczaconfig.From((*config.Config)(storages[i]))
+				lim := sc.SmallSizeLimit()
+				st = append(st, blobstor.SubStorage{
+					Storage: blobovniczatree.NewBlobovniczaTree(
+						blobovniczatree.WithLogger(c.log),
+						blobovniczatree.WithRootPath(storages[i].Path()),
+						blobovniczatree.WithPermissions(storages[i].Perm()),
+						blobovniczatree.WithBlobovniczaSize(sub.Size()),
+						blobovniczatree.WithBlobovniczaShallowDepth(sub.ShallowDepth()),
+						blobovniczatree.WithBlobovniczaShallowWidth(sub.ShallowWidth()),
+						blobovniczatree.WithOpenedCacheSize(sub.OpenedCacheSize())),
+					Policy: func(_ *objectSDK.Object, data []byte) bool {
+						return uint64(len(data)) < lim
+					},
+				})
+			case "fstree":
+				sub := fstreeconfig.From((*config.Config)(storages[i]))
+				st = append(st, blobstor.SubStorage{
+					Storage: fstree.New(
+						fstree.WithPath(storages[i].Path()),
+						fstree.WithPerm(storages[i].Perm()),
+						fstree.WithDepth(sub.Depth())),
+					Policy: func(_ *objectSDK.Object, data []byte) bool {
+						return true
+					},
+				})
+			}
+		}
+
 		metaPath := metabaseCfg.Path()
 		metaPerm := metabaseCfg.BoltDB().Perm()
 		fatalOnErr(util.MkdirAllX(filepath.Dir(metaPath), metaPerm))
@@ -453,15 +486,9 @@ func initShardOptions(c *cfg) {
 			shard.WithRefillMetabase(sc.RefillMetabase()),
 			shard.WithMode(sc.Mode()),
 			shard.WithBlobStorOptions(
-				blobstor.WithRootPath(blobStorCfg.Path()),
-				blobstor.WithCompressObjects(blobStorCfg.Compress()),
-				blobstor.WithRootPerm(blobStorCfg.Perm()),
-				blobstor.WithShallowDepth(blobStorCfg.ShallowDepth()),
-				blobstor.WithSmallSizeLimit(blobStorCfg.SmallSizeLimit()),
-				blobstor.WithBlobovniczaSize(blobovniczaCfg.Size()),
-				blobstor.WithBlobovniczaShallowDepth(blobovniczaCfg.ShallowDepth()),
-				blobstor.WithBlobovniczaShallowWidth(blobovniczaCfg.ShallowWidth()),
-				blobstor.WithBlobovniczaOpenedCacheSize(blobovniczaCfg.OpenedCacheSize()),
+				blobstor.WithCompressObjects(sc.Compress()),
+				blobstor.WithUncompressableContentTypes(sc.UncompressableContentTypes()),
+				blobstor.WithStorages(st),
 				blobstor.WithLogger(c.log),
 			),
 			shard.WithMetaBaseOptions(
diff --git a/cmd/neofs-node/config/engine/config.go b/cmd/neofs-node/config/engine/config.go
index 51f8a393..37b6f1c3 100644
--- a/cmd/neofs-node/config/engine/config.go
+++ b/cmd/neofs-node/config/engine/config.go
@@ -39,7 +39,7 @@ func IterateShards(c *config.Config, required bool, f func(*shardconfig.Config))
 		// must have different paths, so if it is missing, the shard is not here.
 		// At the same time checking for "blobstor" section doesn't work proper
 		// with configuration via the environment.
-		if (*config.Config)(sc).Value("blobstor.path") == nil {
+		if (*config.Config)(sc).Value("metabase.path") == nil {
 			break
 		}
 		(*config.Config)(sc).SetDefault(def)
diff --git a/cmd/neofs-node/config/engine/config_test.go b/cmd/neofs-node/config/engine/config_test.go
index 56684140..54f7bb24 100644
--- a/cmd/neofs-node/config/engine/config_test.go
+++ b/cmd/neofs-node/config/engine/config_test.go
@@ -8,6 +8,8 @@ import (
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-node/config"
 	engineconfig "github.com/nspcc-dev/neofs-node/cmd/neofs-node/config/engine"
 	shardconfig "github.com/nspcc-dev/neofs-node/cmd/neofs-node/config/engine/shard"
+	blobovniczaconfig "github.com/nspcc-dev/neofs-node/cmd/neofs-node/config/engine/shard/blobstor/blobovnicza"
+	fstreeconfig "github.com/nspcc-dev/neofs-node/cmd/neofs-node/config/engine/shard/blobstor/fstree"
 	piloramaconfig "github.com/nspcc-dev/neofs-node/cmd/neofs-node/config/engine/shard/pilorama"
 	configtest "github.com/nspcc-dev/neofs-node/cmd/neofs-node/config/test"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/shard/mode"
@@ -53,7 +55,7 @@ func TestEngineSection(t *testing.T) {
 			wc := sc.WriteCache()
 			meta := sc.Metabase()
 			blob := sc.BlobStor()
-			blz := blob.Blobovnicza()
+			ss := blob.Storages()
 			pl := sc.Pilorama()
 			gc := sc.GC()
 
@@ -79,18 +81,23 @@ func TestEngineSection(t *testing.T) {
 				require.Equal(t, 100, meta.BoltDB().MaxBatchSize())
 				require.Equal(t, 10*time.Millisecond, meta.BoltDB().MaxBatchDelay())
 
-				require.Equal(t, "tmp/0/blob", blob.Path())
-				require.EqualValues(t, 0644, blob.Perm())
-				require.Equal(t, true, blob.Compress())
-				require.Equal(t, []string{"audio/*", "video/*"}, blob.UncompressableContentTypes())
-				require.EqualValues(t, 5, blob.ShallowDepth())
-				require.EqualValues(t, 102400, blob.SmallSizeLimit())
+				require.Equal(t, true, sc.Compress())
+				require.Equal(t, []string{"audio/*", "video/*"}, sc.UncompressableContentTypes())
+				require.EqualValues(t, 102400, sc.SmallSizeLimit())
 
+				require.Equal(t, 2, len(ss))
+				blz := blobovniczaconfig.From((*config.Config)(ss[0]))
+				require.Equal(t, "tmp/0/blob/blobovnicza", ss[0].Path())
+				require.EqualValues(t, 0644, blz.BoltDB().Perm())
 				require.EqualValues(t, 4194304, blz.Size())
 				require.EqualValues(t, 1, blz.ShallowDepth())
 				require.EqualValues(t, 4, blz.ShallowWidth())
 				require.EqualValues(t, 50, blz.OpenedCacheSize())
 
+				require.Equal(t, "tmp/0/blob", ss[1].Path())
+				require.EqualValues(t, 0644, ss[1].Perm())
+				require.EqualValues(t, 5, fstreeconfig.From((*config.Config)(ss[1])).Depth())
+
 				require.EqualValues(t, 150, gc.RemoverBatchSize())
 				require.Equal(t, 2*time.Minute, gc.RemoverSleepInterval())
 
@@ -117,18 +124,23 @@ func TestEngineSection(t *testing.T) {
 				require.Equal(t, 200, meta.BoltDB().MaxBatchSize())
 				require.Equal(t, 20*time.Millisecond, meta.BoltDB().MaxBatchDelay())
 
-				require.Equal(t, "tmp/1/blob", blob.Path())
-				require.EqualValues(t, 0644, blob.Perm())
-				require.Equal(t, false, blob.Compress())
-				require.Equal(t, []string(nil), blob.UncompressableContentTypes())
-				require.EqualValues(t, 5, blob.ShallowDepth())
-				require.EqualValues(t, 102400, blob.SmallSizeLimit())
+				require.Equal(t, false, sc.Compress())
+				require.Equal(t, []string(nil), sc.UncompressableContentTypes())
+				require.EqualValues(t, 102400, sc.SmallSizeLimit())
 
+				require.Equal(t, 2, len(ss))
+
+				blz := blobovniczaconfig.From((*config.Config)(ss[0]))
+				require.Equal(t, "tmp/1/blob/blobovnicza", ss[0].Path())
 				require.EqualValues(t, 4194304, blz.Size())
 				require.EqualValues(t, 1, blz.ShallowDepth())
 				require.EqualValues(t, 4, blz.ShallowWidth())
 				require.EqualValues(t, 50, blz.OpenedCacheSize())
 
+				require.Equal(t, "tmp/1/blob", ss[1].Path())
+				require.EqualValues(t, 0644, ss[1].Perm())
+				require.EqualValues(t, 5, fstreeconfig.From((*config.Config)(ss[1])).Depth())
+
 				require.EqualValues(t, 200, gc.RemoverBatchSize())
 				require.Equal(t, 5*time.Minute, gc.RemoverSleepInterval())
 
diff --git a/cmd/neofs-node/config/engine/shard/blobstor/blobovnicza/config.go b/cmd/neofs-node/config/engine/shard/blobstor/blobovnicza/config.go
index 1cb571b9..89edc5a0 100644
--- a/cmd/neofs-node/config/engine/shard/blobstor/blobovnicza/config.go
+++ b/cmd/neofs-node/config/engine/shard/blobstor/blobovnicza/config.go
@@ -29,6 +29,11 @@ func From(c *config.Config) *Config {
 	return (*Config)(c)
 }
 
+// Type returns the storage type.
+func (x *Config) Type() string {
+	return "blobovnicza"
+}
+
 // Size returns the value of "size" config parameter.
 //
 // Returns SizeDefault if the value is not a positive number.
diff --git a/cmd/neofs-node/config/engine/shard/blobstor/config.go b/cmd/neofs-node/config/engine/shard/blobstor/config.go
index 524f8ad7..e333e885 100644
--- a/cmd/neofs-node/config/engine/shard/blobstor/config.go
+++ b/cmd/neofs-node/config/engine/shard/blobstor/config.go
@@ -1,122 +1,36 @@
 package blobstorconfig
 
 import (
-	"io/fs"
+	"strconv"
 
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-node/config"
-	blobovniczaconfig "github.com/nspcc-dev/neofs-node/cmd/neofs-node/config/engine/shard/blobstor/blobovnicza"
-	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/fstree"
+	"github.com/nspcc-dev/neofs-node/cmd/neofs-node/config/engine/shard/blobstor/storage"
 )
 
 // Config is a wrapper over the config section
 // which provides access to BlobStor configurations.
 type Config config.Config
 
-// config defaults
-const (
-	// PermDefault are default permission bits for BlobStor data.
-	PermDefault = 0660
-
-	// ShallowDepthDefault is a default shallow dir depth.
-	ShallowDepthDefault = 4
-
-	// SmallSizeLimitDefault is a default limit of small objects payload in bytes.
-	SmallSizeLimitDefault = 1 << 20
-)
-
 // From wraps config section into Config.
 func From(c *config.Config) *Config {
 	return (*Config)(c)
 }
 
-// Path returns the value of "path" config parameter.
-//
-// Panics if the value is not a non-empty string.
-func (x *Config) Path() string {
-	p := config.String(
-		(*config.Config)(x),
-		"path",
-	)
-
-	if p == "" {
-		panic("blobstor path not set")
+// Storages returns the value of storage subcomponents.
+func (x *Config) Storages() []*storage.Config {
+	var ss []*storage.Config
+	for i := 0; ; i++ {
+		typ := config.String(
+			(*config.Config)(x),
+			strconv.Itoa(i)+".type")
+		switch typ {
+		case "":
+			return ss
+		case "fstree", "blobovnicza":
+			sub := storage.From((*config.Config)(x).Sub(strconv.Itoa(i)))
+			ss = append(ss, sub)
+		default:
+			panic("invalid type")
+		}
 	}
-
-	return p
-}
-
-// Perm returns the value of "perm" config parameter as a fs.FileMode.
-//
-// Returns PermDefault if the value is not a non-zero number.
-func (x *Config) Perm() fs.FileMode {
-	p := config.UintSafe(
-		(*config.Config)(x),
-		"perm",
-	)
-
-	if p == 0 {
-		p = PermDefault
-	}
-
-	return fs.FileMode(p)
-}
-
-// ShallowDepth returns the value of "depth" config parameter.
-//
-// Returns ShallowDepthDefault if the value is out of
-// [1:fstree.MaxDepth] range.
-func (x *Config) ShallowDepth() int {
-	d := config.IntSafe(
-		(*config.Config)(x),
-		"depth",
-	)
-
-	if d >= 1 && d <= fstree.MaxDepth {
-		return int(d)
-	}
-
-	return ShallowDepthDefault
-}
-
-// Compress returns the value of "compress" config parameter.
-//
-// Returns false if the value is not a valid bool.
-func (x *Config) Compress() bool {
-	return config.BoolSafe(
-		(*config.Config)(x),
-		"compress",
-	)
-}
-
-// UncompressableContentTypes returns the value of "compress_skip_content_types" config parameter.
-//
-// Returns nil if a the value is missing or is invalid.
-func (x *Config) UncompressableContentTypes() []string {
-	return config.StringSliceSafe(
-		(*config.Config)(x),
-		"compression_exclude_content_types")
-}
-
-// SmallSizeLimit returns the value of "small_object_size" config parameter.
-//
-// Returns SmallSizeLimitDefault if the value is not a positive number.
-func (x *Config) SmallSizeLimit() uint64 {
-	l := config.SizeInBytesSafe(
-		(*config.Config)(x),
-		"small_object_size",
-	)
-
-	if l > 0 {
-		return l
-	}
-
-	return SmallSizeLimitDefault
-}
-
-// Blobovnicza returns "blobovnicza" subsection as a blobovniczaconfig.Config.
-func (x *Config) Blobovnicza() *blobovniczaconfig.Config {
-	return blobovniczaconfig.From(
-		(*config.Config)(x).
-			Sub("blobovnicza"),
-	)
 }
diff --git a/cmd/neofs-node/config/engine/shard/blobstor/fstree/config.go b/cmd/neofs-node/config/engine/shard/blobstor/fstree/config.go
new file mode 100644
index 00000000..69526bb1
--- /dev/null
+++ b/cmd/neofs-node/config/engine/shard/blobstor/fstree/config.go
@@ -0,0 +1,40 @@
+package fstree
+
+import (
+	"github.com/nspcc-dev/neofs-node/cmd/neofs-node/config"
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/fstree"
+)
+
+// Config is a wrapper over the config section
+// which provides access to Blobovnicza configurations.
+type Config config.Config
+
+// DepthDefault is a default shallow dir depth.
+const DepthDefault = 4
+
+// From wraps config section into Config.
+func From(c *config.Config) *Config {
+	return (*Config)(c)
+}
+
+// Type returns the storage type.
+func (x *Config) Type() string {
+	return "fstree"
+}
+
+// Depth returns the value of "depth" config parameter.
+//
+// Returns DepthDefault if the value is out of
+// [1:fstree.MaxDepth] range.
+func (x *Config) Depth() int {
+	d := config.IntSafe(
+		(*config.Config)(x),
+		"depth",
+	)
+
+	if d >= 1 && d <= fstree.MaxDepth {
+		return int(d)
+	}
+
+	return DepthDefault
+}
diff --git a/cmd/neofs-node/config/engine/shard/blobstor/storage/config.go b/cmd/neofs-node/config/engine/shard/blobstor/storage/config.go
new file mode 100644
index 00000000..84c95742
--- /dev/null
+++ b/cmd/neofs-node/config/engine/shard/blobstor/storage/config.go
@@ -0,0 +1,55 @@
+package storage
+
+import (
+	"io/fs"
+
+	"github.com/nspcc-dev/neofs-node/cmd/neofs-node/config"
+)
+
+type Config config.Config
+
+// PermDefault are default permission bits for BlobStor data.
+const PermDefault = 0660
+
+func From(x *config.Config) *Config {
+	return (*Config)(x)
+}
+
+// Type returns storage type.
+func (x *Config) Type() string {
+	return config.String(
+		(*config.Config)(x),
+		"type")
+}
+
+// Path returns the value of "path" config parameter.
+//
+// Panics if the value is not a non-empty string.
+func (x *Config) Path() string {
+	p := config.String(
+		(*config.Config)(x),
+		"path",
+	)
+
+	if p == "" {
+		panic("blobstor path not set")
+	}
+
+	return p
+}
+
+// Perm returns the value of "perm" config parameter as a fs.FileMode.
+//
+// Returns PermDefault if the value is not a non-zero number.
+func (x *Config) Perm() fs.FileMode {
+	p := config.UintSafe(
+		(*config.Config)(x),
+		"perm",
+	)
+
+	if p == 0 {
+		p = PermDefault
+	}
+
+	return fs.FileMode(p)
+}
diff --git a/cmd/neofs-node/config/engine/shard/config.go b/cmd/neofs-node/config/engine/shard/config.go
index 77c032a5..ab1641ae 100644
--- a/cmd/neofs-node/config/engine/shard/config.go
+++ b/cmd/neofs-node/config/engine/shard/config.go
@@ -16,11 +16,49 @@ import (
 // which provides access to Shard configurations.
 type Config config.Config
 
+// SmallSizeLimitDefault is a default limit of small objects payload in bytes.
+const SmallSizeLimitDefault = 1 << 20
+
 // From wraps config section into Config.
 func From(c *config.Config) *Config {
 	return (*Config)(c)
 }
 
+// Compress returns the value of "compress" config parameter.
+//
+// Returns false if the value is not a valid bool.
+func (x *Config) Compress() bool {
+	return config.BoolSafe(
+		(*config.Config)(x),
+		"compress",
+	)
+}
+
+// UncompressableContentTypes returns the value of "compress_skip_content_types" config parameter.
+//
+// Returns nil if a the value is missing or is invalid.
+func (x *Config) UncompressableContentTypes() []string {
+	return config.StringSliceSafe(
+		(*config.Config)(x),
+		"compression_exclude_content_types")
+}
+
+// SmallSizeLimit returns the value of "small_object_size" config parameter.
+//
+// Returns SmallSizeLimitDefault if the value is not a positive number.
+func (x *Config) SmallSizeLimit() uint64 {
+	l := config.SizeInBytesSafe(
+		(*config.Config)(x),
+		"small_object_size",
+	)
+
+	if l > 0 {
+		return l
+	}
+
+	return SmallSizeLimitDefault
+}
+
 // BlobStor returns "blobstor" subsection as a blobstorconfig.Config.
 func (x *Config) BlobStor() *blobstorconfig.Config {
 	return blobstorconfig.From(
diff --git a/config/example/node.env b/config/example/node.env
index 59b02e20..1544c444 100644
--- a/config/example/node.env
+++ b/config/example/node.env
@@ -101,17 +101,22 @@ NEOFS_STORAGE_SHARD_0_METABASE_PERM=0644
 NEOFS_STORAGE_SHARD_0_METABASE_MAX_BATCH_SIZE=100
 NEOFS_STORAGE_SHARD_0_METABASE_MAX_BATCH_DELAY=10ms
 ### Blobstor config
-NEOFS_STORAGE_SHARD_0_BLOBSTOR_PATH=tmp/0/blob
-NEOFS_STORAGE_SHARD_0_BLOBSTOR_PERM=0644
-NEOFS_STORAGE_SHARD_0_BLOBSTOR_COMPRESS=true
-NEOFS_STORAGE_SHARD_0_BLOBSTOR_COMPRESSION_EXCLUDE_CONTENT_TYPES="audio/* video/*"
-NEOFS_STORAGE_SHARD_0_BLOBSTOR_DEPTH=5
-NEOFS_STORAGE_SHARD_0_BLOBSTOR_SMALL_OBJECT_SIZE=102400
+NEOFS_STORAGE_SHARD_0_COMPRESS=true
+NEOFS_STORAGE_SHARD_0_COMPRESSION_EXCLUDE_CONTENT_TYPES="audio/* video/*"
+NEOFS_STORAGE_SHARD_0_SMALL_OBJECT_SIZE=102400
 ### Blobovnicza config
-NEOFS_STORAGE_SHARD_0_BLOBSTOR_BLOBOVNICZA_SIZE=4194304
-NEOFS_STORAGE_SHARD_0_BLOBSTOR_BLOBOVNICZA_DEPTH=1
-NEOFS_STORAGE_SHARD_0_BLOBSTOR_BLOBOVNICZA_WIDTH=4
-NEOFS_STORAGE_SHARD_0_BLOBSTOR_BLOBOVNICZA_OPENED_CACHE_CAPACITY=50
+NEOFS_STORAGE_SHARD_0_BLOBSTOR_0_PATH=tmp/0/blob/blobovnicza
+NEOFS_STORAGE_SHARD_0_BLOBSTOR_0_PERM=0644
+NEOFS_STORAGE_SHARD_0_BLOBSTOR_0_TYPE=blobovnicza
+NEOFS_STORAGE_SHARD_0_BLOBSTOR_0_SIZE=4194304
+NEOFS_STORAGE_SHARD_0_BLOBSTOR_0_DEPTH=1
+NEOFS_STORAGE_SHARD_0_BLOBSTOR_0_WIDTH=4
+NEOFS_STORAGE_SHARD_0_BLOBSTOR_0_OPENED_CACHE_CAPACITY=50
+### FSTree config
+NEOFS_STORAGE_SHARD_0_BLOBSTOR_1_TYPE=fstree
+NEOFS_STORAGE_SHARD_0_BLOBSTOR_1_PATH=tmp/0/blob
+NEOFS_STORAGE_SHARD_0_BLOBSTOR_1_PERM=0644
+NEOFS_STORAGE_SHARD_0_BLOBSTOR_1_DEPTH=5
 ### Pilorama config
 NEOFS_STORAGE_SHARD_0_PILORAMA_PATH="tmp/0/blob/pilorama.db"
 NEOFS_STORAGE_SHARD_0_PILORAMA_MAX_BATCH_DELAY=10ms
@@ -141,16 +146,20 @@ NEOFS_STORAGE_SHARD_1_METABASE_PERM=0644
 NEOFS_STORAGE_SHARD_1_METABASE_MAX_BATCH_SIZE=200
 NEOFS_STORAGE_SHARD_1_METABASE_MAX_BATCH_DELAY=20ms
 ### Blobstor config
-NEOFS_STORAGE_SHARD_1_BLOBSTOR_PATH=tmp/1/blob
-NEOFS_STORAGE_SHARD_1_BLOBSTOR_PERM=0644
-NEOFS_STORAGE_SHARD_1_BLOBSTOR_COMPRESS=false
-NEOFS_STORAGE_SHARD_1_BLOBSTOR_DEPTH=5
-NEOFS_STORAGE_SHARD_1_BLOBSTOR_SMALL_OBJECT_SIZE=102400
+NEOFS_STORAGE_SHARD_1_COMPRESS=false
+NEOFS_STORAGE_SHARD_1_SMALL_OBJECT_SIZE=102400
 ### Blobovnicza config
-NEOFS_STORAGE_SHARD_1_BLOBSTOR_BLOBOVNICZA_SIZE=4194304
-NEOFS_STORAGE_SHARD_1_BLOBSTOR_BLOBOVNICZA_DEPTH=1
-NEOFS_STORAGE_SHARD_1_BLOBSTOR_BLOBOVNICZA_WIDTH=4
-NEOFS_STORAGE_SHARD_1_BLOBSTOR_BLOBOVNICZA_OPENED_CACHE_CAPACITY=50
+NEOFS_STORAGE_SHARD_1_BLOBSTOR_0_TYPE=blobovnicza
+NEOFS_STORAGE_SHARD_1_BLOBSTOR_0_PATH=tmp/1/blob/blobovnicza
+NEOFS_STORAGE_SHARD_1_BLOBSTOR_0_SIZE=4194304
+NEOFS_STORAGE_SHARD_1_BLOBSTOR_0_DEPTH=1
+NEOFS_STORAGE_SHARD_1_BLOBSTOR_0_WIDTH=4
+NEOFS_STORAGE_SHARD_1_BLOBSTOR_0_OPENED_CACHE_CAPACITY=50
+### FSTree config
+NEOFS_STORAGE_SHARD_1_BLOBSTOR_1_TYPE=fstree
+NEOFS_STORAGE_SHARD_1_BLOBSTOR_1_PATH=tmp/1/blob
+NEOFS_STORAGE_SHARD_1_BLOBSTOR_1_PERM=0644
+NEOFS_STORAGE_SHARD_1_BLOBSTOR_1_DEPTH=5
 ### Pilorama config
 NEOFS_STORAGE_SHARD_1_PILORAMA_PATH="tmp/1/blob/pilorama.db"
 NEOFS_STORAGE_SHARD_1_PILORAMA_PERM=0644
diff --git a/config/example/node.json b/config/example/node.json
index 6516cd4e..ab639adb 100644
--- a/config/example/node.json
+++ b/config/example/node.json
@@ -147,22 +147,28 @@
           "max_batch_size": 100,
           "max_batch_delay": "10ms"
         },
-        "blobstor": {
-          "path": "tmp/0/blob",
-          "perm": "0644",
-          "compress": true,
-          "compression_exclude_content_types": [
-            "audio/*", "video/*"
-          ],
-          "depth": 5,
-          "small_object_size": 102400,
-          "blobovnicza": {
+        "compress": true,
+        "compression_exclude_content_types": [
+          "audio/*", "video/*"
+        ],
+        "small_object_size": 102400,
+        "blobstor": [
+          {
+            "type": "blobovnicza",
+            "path": "tmp/0/blob/blobovnicza",
+            "perm": "0644",
             "size": 4194304,
             "depth": 1,
             "width": 4,
             "opened_cache_capacity": 50
+          },
+          {
+            "type": "fstree",
+            "path": "tmp/0/blob",
+            "perm": "0644",
+            "depth": 5
           }
-        },
+        ],
         "pilorama": {
           "path": "tmp/0/blob/pilorama.db",
           "max_batch_delay": "10ms",
@@ -191,19 +197,25 @@
           "max_batch_size": 200,
           "max_batch_delay": "20ms"
         },
-        "blobstor": {
-          "path": "tmp/1/blob",
-          "perm": "0644",
-          "compress": false,
-          "depth": 5,
-          "small_object_size": 102400,
-          "blobovnicza": {
+        "compress": false,
+        "small_object_size": 102400,
+        "blobstor": [
+          {
+            "type": "blobovnicza",
+            "path": "tmp/1/blob/blobovnicza",
+            "perm": "0644",
             "size": 4194304,
             "depth": 1,
             "width": 4,
             "opened_cache_capacity": 50
+          },
+          {
+            "type": "fstree",
+            "path": "tmp/1/blob",
+            "perm": "0644",
+            "depth": 5
           }
-        },
+        ],
         "pilorama": {
           "path": "tmp/1/blob/pilorama.db",
           "perm": "0644",
diff --git a/config/example/node.yaml b/config/example/node.yaml
index 88a2151c..89180417 100644
--- a/config/example/node.yaml
+++ b/config/example/node.yaml
@@ -126,17 +126,17 @@ storage:
         max_batch_delay: 5ms # maximum delay for a batch of operations to be executed
         max_batch_size: 100 # maximum amount of operations in a single batch
 
-      blobstor:
-        compress: false  # turn on/off zstd(level 3) compression of stored objects
-        perm: 0644  # permissions for blobstor files(directories: +x for current user and group)
-        depth: 5  # max depth of object tree storage in FS
-        small_object_size: 100 kb  # size threshold for "small" objects which are cached in key-value DB, not in FS, bytes
+      compress: false  # turn on/off zstd(level 3) compression of stored objects
+      small_object_size: 100 kb  # size threshold for "small" objects which are cached in key-value DB, not in FS, bytes
 
-        blobovnicza:
-          size: 4m  # approximate size limit of single blobovnicza instance, total size will be: size*width^(depth+1), bytes
+      blobstor:
+        - size: 4m  # approximate size limit of single blobovnicza instance, total size will be: size*width^(depth+1), bytes
+          perm: 0644  # permissions for blobstor files(directories: +x for current user and group)
           depth: 1  # max depth of object tree storage in key-value DB
           width: 4   # max width of object tree storage in key-value DB
           opened_cache_capacity: 50  # maximum number of opened database files
+        - perm: 0644  # permissions for blobstor files(directories: +x for current user and group)
+          depth: 5  # max depth of object tree storage in FS
 
       gc:
         remover_batch_size: 200  # number of objects to be removed by the garbage collector
@@ -156,12 +156,16 @@ storage:
         max_batch_size: 100
         max_batch_delay: 10ms
 
+      compress: true  # turn on/off zstd(level 3) compression of stored objects
+      compression_exclude_content_types:
+        - audio/*
+        - video/*
+
       blobstor:
-        path: tmp/0/blob  # blobstor path
-        compress: true  # turn on/off zstd(level 3) compression of stored objects
-        compression_exclude_content_types:
-          - audio/*
-          - video/*
+        - type: blobovnicza
+          path: tmp/0/blob/blobovnicza
+        - type: fstree
+          path: tmp/0/blob  # blobstor path
 
       pilorama:
         path: tmp/0/blob/pilorama.db # path to the pilorama database. If omitted, `pilorama.db` file is created blobstor.path
@@ -181,8 +185,10 @@ storage:
         path: tmp/1/meta  # metabase path
 
       blobstor:
-        path: tmp/1/blob  # blobstor path
-
+        - type: blobovnicza
+          path: tmp/1/blob/blobovnicza
+        - type: fstree
+          path: tmp/1/blob  # blobstor path
 
       pilorama:
         path: tmp/1/blob/pilorama.db
diff --git a/pkg/local_object_storage/blobstor/blobovniczatree/blobovnicza.go b/pkg/local_object_storage/blobstor/blobovniczatree/blobovnicza.go
index f5fb68c5..af96894f 100644
--- a/pkg/local_object_storage/blobstor/blobovniczatree/blobovnicza.go
+++ b/pkg/local_object_storage/blobstor/blobovniczatree/blobovnicza.go
@@ -11,6 +11,7 @@ import (
 	"github.com/nspcc-dev/hrw"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobovnicza"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/common"
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/compression"
 	apistatus "github.com/nspcc-dev/neofs-sdk-go/client/status"
 	objectSDK "github.com/nspcc-dev/neofs-sdk-go/object"
 	oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
@@ -76,8 +77,6 @@ type Blobovniczas struct {
 	// list of active (opened, non-filled) Blobovniczas
 	activeMtx sync.RWMutex
 	active    map[string]blobovniczaWithIndex
-
-	onClose []func()
 }
 
 type blobovniczaWithIndex struct {
@@ -887,3 +886,8 @@ func u64FromHexString(str string) uint64 {
 func (b *Blobovniczas) Type() string {
 	return "blobovniczas"
 }
+
+// SetCompressor implements common.Storage.
+func (b *Blobovniczas) SetCompressor(cc *compression.CConfig) {
+	b.CConfig = cc
+}
diff --git a/pkg/local_object_storage/blobstor/blobovniczatree/control.go b/pkg/local_object_storage/blobstor/blobovniczatree/control.go
index 58450d9a..fd772fef 100644
--- a/pkg/local_object_storage/blobstor/blobovniczatree/control.go
+++ b/pkg/local_object_storage/blobstor/blobovniczatree/control.go
@@ -19,16 +19,6 @@ func (b *Blobovniczas) Open(readOnly bool) error {
 func (b *Blobovniczas) Init() error {
 	b.log.Debug("initializing Blobovnicza's")
 
-	err := b.CConfig.Init()
-	if err != nil {
-		return err
-	}
-	b.onClose = append(b.onClose, func() {
-		if err := b.CConfig.Close(); err != nil {
-			b.log.Debug("can't close zstd compressor", zap.String("err", err.Error()))
-		}
-	})
-
 	if b.readOnly {
 		b.log.Debug("read-only mode, skip blobovniczas initialization...")
 		return nil
@@ -78,9 +68,5 @@ func (b *Blobovniczas) Close() error {
 
 	b.activeMtx.Unlock()
 
-	for i := range b.onClose {
-		b.onClose[i]()
-	}
-
 	return nil
 }
diff --git a/pkg/local_object_storage/blobstor/blobovniczatree/option.go b/pkg/local_object_storage/blobstor/blobovniczatree/option.go
index 8f578ce3..b16243b1 100644
--- a/pkg/local_object_storage/blobstor/blobovniczatree/option.go
+++ b/pkg/local_object_storage/blobstor/blobovniczatree/option.go
@@ -36,7 +36,6 @@ func initConfig(c *cfg) {
 		openedCacheSize: defaultOpenedCacheSize,
 		blzShallowDepth: defaultBlzShallowDepth,
 		blzShallowWidth: defaultBlzShallowWidth,
-		CConfig:         new(compression.CConfig),
 	}
 }
 
@@ -53,12 +52,6 @@ func WithPermissions(perm fs.FileMode) Option {
 	}
 }
 
-func WithCompressionConfig(cc *compression.CConfig) Option {
-	return func(c *cfg) {
-		c.CConfig = cc
-	}
-}
-
 func WithBlobovniczaShallowWidth(width uint64) Option {
 	return func(c *cfg) {
 		c.blzShallowWidth = width
diff --git a/pkg/local_object_storage/blobstor/blobstor.go b/pkg/local_object_storage/blobstor/blobstor.go
index 1bd21746..dabc4f18 100644
--- a/pkg/local_object_storage/blobstor/blobstor.go
+++ b/pkg/local_object_storage/blobstor/blobstor.go
@@ -1,12 +1,8 @@
 package blobstor
 
 import (
-	"encoding/hex"
-	"io/fs"
-	"path/filepath"
 	"sync"
 
-	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/blobovniczatree"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/common"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/compression"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/fstree"
@@ -28,8 +24,6 @@ type BlobStor struct {
 
 	modeMtx sync.RWMutex
 	mode    mode.Mode
-
-	storage [2]SubStorage
 }
 
 type Info = fstree.Info
@@ -39,37 +33,12 @@ type Option func(*cfg)
 
 type cfg struct {
 	compression.CConfig
-
-	fsTreeDepth int
-	fsTreeInfo  fstree.Info
-
-	smallSizeLimit uint64
-
-	log *logger.Logger
-
-	blzOpts []blobovniczatree.Option
+	log     *logger.Logger
+	storage []SubStorage
 }
 
-const (
-	defaultShallowDepth = 4
-	defaultPerm         = 0700
-
-	defaultSmallSizeLimit = 1 << 20 // 1MB
-)
-
-const blobovniczaDir = "blobovnicza"
-
 func initConfig(c *cfg) {
-	*c = cfg{
-		fsTreeDepth: defaultShallowDepth,
-		fsTreeInfo: Info{
-			Permissions: defaultPerm,
-			RootPath:    "./",
-		},
-		smallSizeLimit: defaultSmallSizeLimit,
-		log:            zap.L(),
-	}
-	c.blzOpts = []blobovniczatree.Option{blobovniczatree.WithCompressionConfig(&c.CConfig)}
+	c.log = zap.L()
 }
 
 // New creates, initializes and returns new BlobStor instance.
@@ -81,23 +50,10 @@ func New(opts ...Option) *BlobStor {
 		opts[i](&bs.cfg)
 	}
 
-	bs.storage[0].Storage = blobovniczatree.NewBlobovniczaTree(bs.blzOpts...)
-	bs.storage[0].Policy = func(_ *objectSDK.Object, data []byte) bool {
-		return uint64(len(data)) <= bs.cfg.smallSizeLimit
+	for i := range bs.storage {
+		bs.storage[i].Storage.SetCompressor(&bs.CConfig)
 	}
 
-	bs.storage[1].Storage = &fstree.FSTree{
-		Info:       bs.cfg.fsTreeInfo,
-		Depth:      bs.cfg.fsTreeDepth,
-		DirNameLen: hex.EncodedLen(fstree.DirNameLen),
-		CConfig:    &bs.cfg.CConfig,
-	}
-	bs.storage[1].Policy = func(*objectSDK.Object, []byte) bool {
-		return true
-	}
-
-	bs.blzOpts = nil
-
 	return bs
 }
 
@@ -106,17 +62,17 @@ func (b *BlobStor) SetLogger(l *zap.Logger) {
 	b.log = l
 }
 
-// WithShallowDepth returns option to set the
-// depth of the object file subdirectory tree.
-//
-// Depth is reduced to maximum value in case of overflow.
-func WithShallowDepth(depth int) Option {
+// WithStorages provides sub-blobstors.
+func WithStorages(st []SubStorage) Option {
 	return func(c *cfg) {
-		if depth > fstree.MaxDepth {
-			depth = fstree.MaxDepth
-		}
+		c.storage = st
+	}
+}
 
-		c.fsTreeDepth = depth
+// WithLogger returns option to specify BlobStor's logger.
+func WithLogger(l *logger.Logger) Option {
+	return func(c *cfg) {
+		c.log = l.With(zap.String("component", "BlobStor"))
 	}
 }
 
@@ -141,70 +97,3 @@ func WithUncompressableContentTypes(values []string) Option {
 		c.UncompressableContentTypes = values
 	}
 }
-
-// WithRootPath returns option to set path to root directory
-// of the fs tree to write the objects.
-func WithRootPath(rootDir string) Option {
-	return func(c *cfg) {
-		c.fsTreeInfo.RootPath = rootDir
-		c.blzOpts = append(c.blzOpts, blobovniczatree.WithRootPath(filepath.Join(rootDir, blobovniczaDir)))
-	}
-}
-
-// WithRootPerm returns option to set permission
-// bits of the fs tree.
-func WithRootPerm(perm fs.FileMode) Option {
-	return func(c *cfg) {
-		c.fsTreeInfo.Permissions = perm
-		c.blzOpts = append(c.blzOpts, blobovniczatree.WithPermissions(perm))
-	}
-}
-
-// WithSmallSizeLimit returns option to set maximum size of
-// "small" object.
-func WithSmallSizeLimit(lim uint64) Option {
-	return func(c *cfg) {
-		c.smallSizeLimit = lim
-		c.blzOpts = append(c.blzOpts, blobovniczatree.WithObjectSizeLimit(lim))
-	}
-}
-
-// WithLogger returns option to specify BlobStor's logger.
-func WithLogger(l *logger.Logger) Option {
-	return func(c *cfg) {
-		c.log = l.With(zap.String("component", "BlobStor"))
-		c.blzOpts = append(c.blzOpts, blobovniczatree.WithLogger(c.log))
-	}
-}
-
-// WithBlobovniczaShallowDepth returns option to specify
-// depth of blobovnicza directories.
-func WithBlobovniczaShallowDepth(d uint64) Option {
-	return func(c *cfg) {
-		c.blzOpts = append(c.blzOpts, blobovniczatree.WithBlobovniczaShallowDepth(d))
-	}
-}
-
-// WithBlobovniczaShallowWidth returns option to specify
-// width of blobovnicza directories.
-func WithBlobovniczaShallowWidth(w uint64) Option {
-	return func(c *cfg) {
-		c.blzOpts = append(c.blzOpts, blobovniczatree.WithBlobovniczaShallowWidth(w))
-	}
-}
-
-// WithBlobovniczaOpenedCacheSize return option to specify
-// maximum number of opened non-active blobovnicza's.
-func WithBlobovniczaOpenedCacheSize(sz int) Option {
-	return func(c *cfg) {
-		c.blzOpts = append(c.blzOpts, blobovniczatree.WithOpenedCacheSize(sz))
-	}
-}
-
-// WithBlobovniczaSize returns option to specify maximum volume
-// of each blobovnicza.
-func WithBlobovniczaSize(sz uint64) Option {
-	return func(c *cfg) {
-		c.blzOpts = append(c.blzOpts, blobovniczatree.WithBlobovniczaSize(sz))
-	}
-}
diff --git a/pkg/local_object_storage/blobstor/blobstor_test.go b/pkg/local_object_storage/blobstor/blobstor_test.go
index 459563af..436fdfe5 100644
--- a/pkg/local_object_storage/blobstor/blobstor_test.go
+++ b/pkg/local_object_storage/blobstor/blobstor_test.go
@@ -2,14 +2,35 @@ package blobstor
 
 import (
 	"os"
+	"path/filepath"
 	"testing"
 
 	"github.com/nspcc-dev/neofs-node/pkg/core/object"
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/blobovniczatree"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/common"
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/fstree"
 	objectSDK "github.com/nspcc-dev/neofs-sdk-go/object"
 	"github.com/stretchr/testify/require"
 )
 
+const blobovniczaDir = "blobovniczas"
+
+func defaultStorages(p string, smallSizeLimit uint64) []SubStorage {
+	return []SubStorage{
+		{
+			Storage: blobovniczatree.NewBlobovniczaTree(
+				blobovniczatree.WithRootPath(filepath.Join(p, "blobovniczas")),
+				blobovniczatree.WithBlobovniczaShallowWidth(1)), // default width is 16, slow init
+			Policy: func(_ *objectSDK.Object, data []byte) bool {
+				return uint64(len(data)) <= smallSizeLimit
+			},
+		},
+		{
+			Storage: fstree.New(fstree.WithPath(p)),
+		},
+	}
+}
+
 func TestCompression(t *testing.T) {
 	dir, err := os.MkdirTemp("", "neofs*")
 	require.NoError(t, err)
@@ -21,10 +42,9 @@ func TestCompression(t *testing.T) {
 	)
 
 	newBlobStor := func(t *testing.T, compress bool) *BlobStor {
-		bs := New(WithCompressObjects(compress),
-			WithRootPath(dir),
-			WithSmallSizeLimit(smallSizeLimit),
-			WithBlobovniczaShallowWidth(1)) // default width is 16, slow init
+		bs := New(
+			WithCompressObjects(compress),
+			WithStorages(defaultStorages(dir, smallSizeLimit)))
 		require.NoError(t, bs.Open(false))
 		require.NoError(t, bs.Init())
 		return bs
@@ -86,11 +106,22 @@ func TestBlobstor_needsCompression(t *testing.T) {
 		require.NoError(t, err)
 		t.Cleanup(func() { _ = os.RemoveAll(dir) })
 
-		bs := New(WithCompressObjects(compress),
-			WithRootPath(dir),
-			WithSmallSizeLimit(smallSizeLimit),
-			WithBlobovniczaShallowWidth(1),
-			WithUncompressableContentTypes(ct))
+		bs := New(
+			WithCompressObjects(compress),
+			WithUncompressableContentTypes(ct),
+			WithStorages([]SubStorage{
+				{
+					Storage: blobovniczatree.NewBlobovniczaTree(
+						blobovniczatree.WithRootPath(filepath.Join(dir, "blobovnicza")),
+						blobovniczatree.WithBlobovniczaShallowWidth(1)), // default width is 16, slow init
+					Policy: func(_ *objectSDK.Object, data []byte) bool {
+						return uint64(len(data)) < smallSizeLimit
+					},
+				},
+				{
+					Storage: fstree.New(fstree.WithPath(dir)),
+				},
+			}))
 		require.NoError(t, bs.Open(false))
 		require.NoError(t, bs.Init())
 		return bs
diff --git a/pkg/local_object_storage/blobstor/common/storage.go b/pkg/local_object_storage/blobstor/common/storage.go
index 13e0641a..741a863e 100644
--- a/pkg/local_object_storage/blobstor/common/storage.go
+++ b/pkg/local_object_storage/blobstor/common/storage.go
@@ -1,5 +1,7 @@
 package common
 
+import "github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/compression"
+
 // Storage represents key-value object storage.
 // It is used as a building block for a blobstor of a shard.
 type Storage interface {
@@ -8,6 +10,7 @@ type Storage interface {
 	Close() error
 
 	Type() string
+	SetCompressor(cc *compression.CConfig)
 
 	Get(GetPrm) (GetRes, error)
 	GetRange(GetRangePrm) (GetRangeRes, error)
diff --git a/pkg/local_object_storage/blobstor/control.go b/pkg/local_object_storage/blobstor/control.go
index 785f6d7b..e009080d 100644
--- a/pkg/local_object_storage/blobstor/control.go
+++ b/pkg/local_object_storage/blobstor/control.go
@@ -31,6 +31,10 @@ var ErrInitBlobovniczas = errors.New("failure on blobovnicza initialization stag
 func (b *BlobStor) Init() error {
 	b.log.Debug("initializing...")
 
+	if err := b.CConfig.Init(); err != nil {
+		return err
+	}
+
 	for i := range b.storage {
 		err := b.storage[i].Storage.Init()
 		if err != nil {
@@ -55,5 +59,10 @@ func (b *BlobStor) Close() error {
 			continue
 		}
 	}
+
+	err := b.CConfig.Close()
+	if firstErr == nil {
+		firstErr = err
+	}
 	return firstErr
 }
diff --git a/pkg/local_object_storage/blobstor/delete.go b/pkg/local_object_storage/blobstor/delete.go
index c605bb55..faa58933 100644
--- a/pkg/local_object_storage/blobstor/delete.go
+++ b/pkg/local_object_storage/blobstor/delete.go
@@ -26,7 +26,7 @@ func (b *BlobStor) Delete(prm common.DeletePrm) (common.DeleteRes, error) {
 		}
 	}
 	if len(prm.StorageID) == 0 {
-		return b.storage[1].Storage.Delete(prm)
+		return b.storage[len(b.storage)-1].Storage.Delete(prm)
 	}
 	return b.storage[0].Storage.Delete(prm)
 }
diff --git a/pkg/local_object_storage/blobstor/exists_test.go b/pkg/local_object_storage/blobstor/exists_test.go
index 7a1ad187..1db0c2cd 100644
--- a/pkg/local_object_storage/blobstor/exists_test.go
+++ b/pkg/local_object_storage/blobstor/exists_test.go
@@ -20,9 +20,8 @@ func TestExists(t *testing.T) {
 
 	const smallSizeLimit = 512
 
-	b := New(WithRootPath(dir),
-		WithSmallSizeLimit(smallSizeLimit),
-		WithBlobovniczaShallowWidth(1)) // default width is 16, slow init
+	b := New(
+		WithStorages(defaultStorages(dir, smallSizeLimit)))
 	require.NoError(t, b.Open(false))
 	require.NoError(t, b.Init())
 
@@ -65,7 +64,7 @@ func TestExists(t *testing.T) {
 		require.NotEmpty(t, bigDir)
 
 		require.NoError(t, os.Chmod(dir, 0))
-		t.Cleanup(func() { require.NoError(t, os.Chmod(dir, b.fsTreeInfo.Permissions)) })
+		t.Cleanup(func() { require.NoError(t, os.Chmod(dir, 0777)) })
 
 		// Object exists, first error is logged.
 		prm.Address = objectCore.AddressOf(objects[0])
diff --git a/pkg/local_object_storage/blobstor/fstree/control.go b/pkg/local_object_storage/blobstor/fstree/control.go
index eb82cf17..93d0d08e 100644
--- a/pkg/local_object_storage/blobstor/fstree/control.go
+++ b/pkg/local_object_storage/blobstor/fstree/control.go
@@ -1,10 +1,16 @@
 package fstree
 
+import (
+	"github.com/nspcc-dev/neofs-node/pkg/util"
+)
+
 // Open implements common.Storage.
 func (*FSTree) Open(bool) error { return nil }
 
 // Init implements common.Storage.
-func (*FSTree) Init() error { return nil }
+func (t *FSTree) Init() error {
+	return util.MkdirAllX(t.RootPath, t.Permissions)
+}
 
 // Close implements common.Storage.
 func (*FSTree) Close() error { return nil }
diff --git a/pkg/local_object_storage/blobstor/fstree/fstree.go b/pkg/local_object_storage/blobstor/fstree/fstree.go
index f987857b..d430dfcf 100644
--- a/pkg/local_object_storage/blobstor/fstree/fstree.go
+++ b/pkg/local_object_storage/blobstor/fstree/fstree.go
@@ -45,6 +45,23 @@ const (
 
 var _ common.Storage = (*FSTree)(nil)
 
+func New(opts ...Option) *FSTree {
+	f := &FSTree{
+		Info: Info{
+			Permissions: 0700,
+			RootPath:    "./",
+		},
+		CConfig:    nil,
+		Depth:      4,
+		DirNameLen: DirNameLen,
+	}
+	for i := range opts {
+		opts[i](f)
+	}
+
+	return f
+}
+
 func stringifyAddress(addr oid.Address) string {
 	return addr.Object().EncodeToString() + "." + addr.Container().EncodeToString()
 }
@@ -299,3 +316,8 @@ func (t *FSTree) NumberOfObjects() (uint64, error) {
 func (*FSTree) Type() string {
 	return "fstree"
 }
+
+// SetCompressor implements common.Storage.
+func (t *FSTree) SetCompressor(cc *compression.CConfig) {
+	t.CConfig = cc
+}
diff --git a/pkg/local_object_storage/blobstor/fstree/option.go b/pkg/local_object_storage/blobstor/fstree/option.go
new file mode 100644
index 00000000..fd3cc272
--- /dev/null
+++ b/pkg/local_object_storage/blobstor/fstree/option.go
@@ -0,0 +1,31 @@
+package fstree
+
+import (
+	"io/fs"
+)
+
+type Option func(*FSTree)
+
+func WithDepth(d int) Option {
+	return func(f *FSTree) {
+		f.Depth = d
+	}
+}
+
+func WithDirNameLen(l int) Option {
+	return func(f *FSTree) {
+		f.DirNameLen = l
+	}
+}
+
+func WithPerm(p fs.FileMode) Option {
+	return func(f *FSTree) {
+		f.Permissions = p
+	}
+}
+
+func WithPath(p string) Option {
+	return func(f *FSTree) {
+		f.RootPath = p
+	}
+}
diff --git a/pkg/local_object_storage/blobstor/get.go b/pkg/local_object_storage/blobstor/get.go
index 25bfd7b8..da90999a 100644
--- a/pkg/local_object_storage/blobstor/get.go
+++ b/pkg/local_object_storage/blobstor/get.go
@@ -23,7 +23,7 @@ func (b *BlobStor) Get(prm common.GetPrm) (common.GetRes, error) {
 		return common.GetRes{}, errNotFound
 	}
 	if len(prm.StorageID) == 0 {
-		return b.storage[1].Storage.Get(prm)
+		return b.storage[len(b.storage)-1].Storage.Get(prm)
 	}
 	return b.storage[0].Storage.Get(prm)
 }
diff --git a/pkg/local_object_storage/blobstor/get_range.go b/pkg/local_object_storage/blobstor/get_range.go
index c5289f87..722a667f 100644
--- a/pkg/local_object_storage/blobstor/get_range.go
+++ b/pkg/local_object_storage/blobstor/get_range.go
@@ -23,7 +23,7 @@ func (b *BlobStor) GetRange(prm common.GetRangePrm) (common.GetRangeRes, error)
 		return common.GetRangeRes{}, errNotFound
 	}
 	if len(prm.StorageID) == 0 {
-		return b.storage[1].Storage.GetRange(prm)
+		return b.storage[len(b.storage)-1].Storage.GetRange(prm)
 	}
 	return b.storage[0].Storage.GetRange(prm)
 }
diff --git a/pkg/local_object_storage/blobstor/info.go b/pkg/local_object_storage/blobstor/info.go
index 87ce5606..60a143ce 100644
--- a/pkg/local_object_storage/blobstor/info.go
+++ b/pkg/local_object_storage/blobstor/info.go
@@ -4,5 +4,10 @@ import "github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/fstree
 
 // DumpInfo returns information about blob stor.
 func (b *BlobStor) DumpInfo() fstree.Info {
-	return b.cfg.fsTreeInfo
+	for i := range b.storage {
+		if b.storage[i].Storage.Type() == "fstree" {
+			return b.storage[i].Storage.(*fstree.FSTree).Info
+		}
+	}
+	return fstree.Info{}
 }
diff --git a/pkg/local_object_storage/blobstor/iterate.go b/pkg/local_object_storage/blobstor/iterate.go
index 23f67b92..81cd31d0 100644
--- a/pkg/local_object_storage/blobstor/iterate.go
+++ b/pkg/local_object_storage/blobstor/iterate.go
@@ -19,7 +19,7 @@ func (b *BlobStor) Iterate(prm common.IteratePrm) (common.IterateRes, error) {
 	for i := range b.storage {
 		_, err := b.storage[i].Storage.Iterate(prm)
 		if err != nil && !prm.IgnoreErrors {
-			return common.IterateRes{}, fmt.Errorf("blobovnizas iterator failure: %w", err)
+			return common.IterateRes{}, fmt.Errorf("blobstor iterator failure: %w", err)
 		}
 	}
 	return common.IterateRes{}, nil
diff --git a/pkg/local_object_storage/blobstor/iterate_test.go b/pkg/local_object_storage/blobstor/iterate_test.go
index f5dfd5f3..78191e92 100644
--- a/pkg/local_object_storage/blobstor/iterate_test.go
+++ b/pkg/local_object_storage/blobstor/iterate_test.go
@@ -18,11 +18,8 @@ func TestIterateObjects(t *testing.T) {
 
 	// create BlobStor instance
 	blobStor := New(
+		WithStorages(defaultStorages(p, smalSz)),
 		WithCompressObjects(true),
-		WithRootPath(p),
-		WithSmallSizeLimit(smalSz),
-		WithBlobovniczaShallowWidth(1),
-		WithBlobovniczaShallowDepth(1),
 	)
 
 	defer os.RemoveAll(p)
diff --git a/pkg/local_object_storage/blobstor/put.go b/pkg/local_object_storage/blobstor/put.go
index 9e7b7c86..6e0f4553 100644
--- a/pkg/local_object_storage/blobstor/put.go
+++ b/pkg/local_object_storage/blobstor/put.go
@@ -33,7 +33,7 @@ func (b *BlobStor) Put(prm common.PutPrm) (common.PutRes, error) {
 	}
 
 	for i := range b.storage {
-		if b.storage[i].Policy(prm.Object, prm.RawData) {
+		if b.storage[i].Policy == nil || b.storage[i].Policy(prm.Object, prm.RawData) {
 			res, err := b.storage[i].Storage.Put(prm)
 			if err == nil {
 				storagelog.Write(b.log,
diff --git a/pkg/local_object_storage/engine/engine_test.go b/pkg/local_object_storage/engine/engine_test.go
index c4ebc84e..94fbc445 100644
--- a/pkg/local_object_storage/engine/engine_test.go
+++ b/pkg/local_object_storage/engine/engine_test.go
@@ -8,6 +8,8 @@ import (
 	"testing"
 
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor"
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/blobovniczatree"
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/fstree"
 	meta "github.com/nspcc-dev/neofs-node/pkg/local_object_storage/metabase"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/pilorama"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/shard"
@@ -94,6 +96,26 @@ func testNewEngineWithShards(shards ...*shard.Shard) *StorageEngine {
 	return engine
 }
 
+func newStorages(root string, smallSize uint64) []blobstor.SubStorage {
+	return []blobstor.SubStorage{
+		{
+			Storage: blobovniczatree.NewBlobovniczaTree(
+				blobovniczatree.WithRootPath(filepath.Join(root, "blobovnicza")),
+				blobovniczatree.WithBlobovniczaShallowDepth(1),
+				blobovniczatree.WithBlobovniczaShallowWidth(1),
+				blobovniczatree.WithPermissions(0700)),
+			Policy: func(_ *object.Object, data []byte) bool {
+				return uint64(len(data)) < smallSize
+			},
+		},
+		{
+			Storage: fstree.New(
+				fstree.WithPath(root),
+				fstree.WithDepth(1)),
+		},
+	}
+}
+
 func testNewShard(t testing.TB, id int) *shard.Shard {
 	sid, err := generateShardID()
 	require.NoError(t, err)
@@ -102,11 +124,9 @@ func testNewShard(t testing.TB, id int) *shard.Shard {
 		shard.WithID(sid),
 		shard.WithLogger(zap.L()),
 		shard.WithBlobStorOptions(
-			blobstor.WithRootPath(filepath.Join(t.Name(), fmt.Sprintf("%d.blobstor", id))),
-			blobstor.WithBlobovniczaShallowWidth(2),
-			blobstor.WithBlobovniczaShallowDepth(2),
-			blobstor.WithRootPerm(0700),
-		),
+			blobstor.WithStorages(
+				newStorages(filepath.Join(t.Name(), fmt.Sprintf("%d.blobstor", id)),
+					1<<20))),
 		shard.WithPiloramaOptions(pilorama.WithPath(filepath.Join(t.Name(), fmt.Sprintf("%d.pilorama", id)))),
 		shard.WithMetaBaseOptions(
 			meta.WithPath(filepath.Join(t.Name(), fmt.Sprintf("%d.metabase", id))),
@@ -125,10 +145,9 @@ func testEngineFromShardOpts(t *testing.T, num int, extraOpts func(int) []shard.
 	for i := 0; i < num; i++ {
 		_, err := engine.AddShard(append([]shard.Option{
 			shard.WithBlobStorOptions(
-				blobstor.WithRootPath(filepath.Join(t.Name(), fmt.Sprintf("blobstor%d", i))),
-				blobstor.WithBlobovniczaShallowWidth(1),
-				blobstor.WithBlobovniczaShallowDepth(1),
-				blobstor.WithRootPerm(0700),
+				blobstor.WithStorages(
+					newStorages(filepath.Join(t.Name(), fmt.Sprintf("blobstor%d", i)),
+						1<<20)),
 			),
 			shard.WithMetaBaseOptions(
 				meta.WithPath(filepath.Join(t.Name(), fmt.Sprintf("metabase%d", i))),
diff --git a/pkg/local_object_storage/engine/error_test.go b/pkg/local_object_storage/engine/error_test.go
index 3c56a461..2439d667 100644
--- a/pkg/local_object_storage/engine/error_test.go
+++ b/pkg/local_object_storage/engine/error_test.go
@@ -43,12 +43,7 @@ func newEngineWithErrorThreshold(t testing.TB, dir string, errThreshold uint32)
 		ids[i], err = e.AddShard(
 			shard.WithLogger(zaptest.NewLogger(t)),
 			shard.WithBlobStorOptions(
-				blobstor.WithRootPath(filepath.Join(dir, strconv.Itoa(i))),
-				blobstor.WithShallowDepth(1),
-				blobstor.WithBlobovniczaShallowWidth(1),
-				blobstor.WithBlobovniczaShallowDepth(1),
-				blobstor.WithSmallSizeLimit(errSmallSize),
-				blobstor.WithRootPerm(0700)),
+				blobstor.WithStorages(newStorages(filepath.Join(dir, strconv.Itoa(i)), errSmallSize))),
 			shard.WithMetaBaseOptions(
 				meta.WithPath(filepath.Join(dir, fmt.Sprintf("%d.metabase", i))),
 				meta.WithPermissions(0700),
diff --git a/pkg/local_object_storage/shard/control_test.go b/pkg/local_object_storage/shard/control_test.go
index 21bb4d91..cfb26716 100644
--- a/pkg/local_object_storage/shard/control_test.go
+++ b/pkg/local_object_storage/shard/control_test.go
@@ -39,11 +39,14 @@ func TestShardOpen(t *testing.T) {
 		return New(
 			WithLogger(zaptest.NewLogger(t)),
 			WithBlobStorOptions(
-				blobstor.WithRootPath(filepath.Join(dir, "blob")),
-				blobstor.WithShallowDepth(1),
-				blobstor.WithSmallSizeLimit(1),
-				blobstor.WithBlobovniczaShallowWidth(1),
-				blobstor.WithBlobovniczaShallowDepth(1)),
+				blobstor.WithStorages([]blobstor.SubStorage{
+					{
+						Storage: fstree.New(
+							fstree.WithDirNameLen(2),
+							fstree.WithPath(filepath.Join(dir, "blob")),
+							fstree.WithDepth(1)),
+					},
+				})),
 			WithMetaBaseOptions(meta.WithPath(metaPath), meta.WithEpochState(epochState{})),
 			WithPiloramaOptions(
 				pilorama.WithPath(filepath.Join(dir, "pilorama"))),
@@ -81,11 +84,15 @@ func TestRefillMetabaseCorrupted(t *testing.T) {
 	dir := t.TempDir()
 
 	blobOpts := []blobstor.Option{
-		blobstor.WithRootPath(filepath.Join(dir, "blob")),
-		blobstor.WithShallowDepth(1),
-		blobstor.WithSmallSizeLimit(1),
-		blobstor.WithBlobovniczaShallowWidth(1),
-		blobstor.WithBlobovniczaShallowDepth(1)}
+		blobstor.WithStorages([]blobstor.SubStorage{
+			{
+				Storage: fstree.New(
+					fstree.WithDirNameLen(2),
+					fstree.WithPath(filepath.Join(dir, "blob")),
+					fstree.WithDepth(1)),
+			},
+		}),
+	}
 
 	sh := New(
 		WithBlobStorOptions(blobOpts...),
@@ -134,9 +141,13 @@ func TestRefillMetabase(t *testing.T) {
 	defer os.RemoveAll(p)
 
 	blobOpts := []blobstor.Option{
-		blobstor.WithRootPath(filepath.Join(p, "blob")),
-		blobstor.WithBlobovniczaShallowWidth(1),
-		blobstor.WithBlobovniczaShallowDepth(1),
+		blobstor.WithStorages([]blobstor.SubStorage{
+			{
+				Storage: fstree.New(
+					fstree.WithPath(filepath.Join(p, "blob")),
+					fstree.WithDepth(1)),
+			},
+		}),
 	}
 
 	sh := New(
diff --git a/pkg/local_object_storage/shard/dump_test.go b/pkg/local_object_storage/shard/dump_test.go
index 5f2ac158..3cf0004e 100644
--- a/pkg/local_object_storage/shard/dump_test.go
+++ b/pkg/local_object_storage/shard/dump_test.go
@@ -13,6 +13,8 @@ import (
 	"github.com/nspcc-dev/neofs-node/pkg/core/object"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobovnicza"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor"
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/blobovniczatree"
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/fstree"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/shard"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/shard/mode"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/writecache"
@@ -52,9 +54,7 @@ func testDump(t *testing.T, objCount int, hasWriteCache bool) {
 				writecache.WithMaxObjectSize(wcBigObjectSize),
 				writecache.WithLogger(zaptest.NewLogger(t)),
 			},
-			[]blobstor.Option{
-				blobstor.WithLogger(zaptest.NewLogger(t)),
-			})
+			nil)
 	}
 	defer releaseShard(sh, t)
 
@@ -186,7 +186,7 @@ func testDump(t *testing.T, objCount int, hasWriteCache bool) {
 
 				t.Run("skip errors", func(t *testing.T) {
 					sh := newCustomShard(t, filepath.Join(t.TempDir(), "ignore"), false, nil, nil)
-					defer releaseShard(sh, t)
+					t.Cleanup(func() { require.NoError(t, sh.Close()) })
 
 					var restorePrm shard.RestorePrm
 					restorePrm.WithPath(out)
@@ -292,14 +292,27 @@ func TestDumpIgnoreErrors(t *testing.T) {
 
 	dir := t.TempDir()
 	bsPath := filepath.Join(dir, "blob")
-	bsOpts := []blobstor.Option{
-		blobstor.WithSmallSizeLimit(bsSmallObjectSize),
-		blobstor.WithRootPath(bsPath),
-		blobstor.WithCompressObjects(true),
-		blobstor.WithShallowDepth(1),
-		blobstor.WithBlobovniczaShallowDepth(1),
-		blobstor.WithBlobovniczaShallowWidth(2),
-		blobstor.WithBlobovniczaOpenedCacheSize(1),
+	bsOpts := func(sw uint64) []blobstor.Option {
+		return []blobstor.Option{
+			blobstor.WithCompressObjects(true),
+			blobstor.WithStorages([]blobstor.SubStorage{
+				{
+					Storage: blobovniczatree.NewBlobovniczaTree(
+						blobovniczatree.WithRootPath(filepath.Join(bsPath, "blobovnicza")),
+						blobovniczatree.WithBlobovniczaShallowDepth(1),
+						blobovniczatree.WithBlobovniczaShallowWidth(sw),
+						blobovniczatree.WithOpenedCacheSize(1)),
+					Policy: func(_ *objectSDK.Object, data []byte) bool {
+						return len(data) < bsSmallObjectSize
+					},
+				},
+				{
+					Storage: fstree.New(
+						fstree.WithPath(bsPath),
+						fstree.WithDepth(1)),
+				},
+			}),
+		}
 	}
 	wcPath := filepath.Join(dir, "writecache")
 	wcOpts := []writecache.Option{
@@ -307,7 +320,7 @@ func TestDumpIgnoreErrors(t *testing.T) {
 		writecache.WithSmallObjectSize(wcSmallObjectSize),
 		writecache.WithMaxObjectSize(wcBigObjectSize),
 	}
-	sh := newCustomShard(t, dir, true, wcOpts, bsOpts)
+	sh := newCustomShard(t, dir, true, wcOpts, bsOpts(2))
 
 	objects := make([]*objectSDK.Object, objCount)
 	for i := 0; i < objCount; i++ {
@@ -355,8 +368,7 @@ func TestDumpIgnoreErrors(t *testing.T) {
 		require.NoError(t, os.MkdirAll(filepath.Join(bsPath, "ZZ"), 0))
 	}
 
-	bsOpts = append(bsOpts, blobstor.WithBlobovniczaShallowWidth(3))
-	sh = newCustomShard(t, dir, true, wcOpts, bsOpts)
+	sh = newCustomShard(t, dir, true, wcOpts, bsOpts(3))
 	require.NoError(t, sh.SetMode(mode.ReadOnly))
 
 	{
diff --git a/pkg/local_object_storage/shard/lock_test.go b/pkg/local_object_storage/shard/lock_test.go
index 1abc6c08..a4b55276 100644
--- a/pkg/local_object_storage/shard/lock_test.go
+++ b/pkg/local_object_storage/shard/lock_test.go
@@ -7,6 +7,8 @@ import (
 
 	objectcore "github.com/nspcc-dev/neofs-node/pkg/core/object"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor"
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/blobovniczatree"
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/fstree"
 	meta "github.com/nspcc-dev/neofs-node/pkg/local_object_storage/metabase"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/shard"
 	apistatus "github.com/nspcc-dev/neofs-sdk-go/client/status"
@@ -24,11 +26,21 @@ func TestShard_Lock(t *testing.T) {
 	opts := []shard.Option{
 		shard.WithLogger(zap.NewNop()),
 		shard.WithBlobStorOptions(
-			[]blobstor.Option{
-				blobstor.WithRootPath(filepath.Join(rootPath, "blob")),
-				blobstor.WithBlobovniczaShallowWidth(2),
-				blobstor.WithBlobovniczaShallowDepth(2),
-			}...,
+			blobstor.WithStorages([]blobstor.SubStorage{
+				{
+					Storage: blobovniczatree.NewBlobovniczaTree(
+						blobovniczatree.WithRootPath(filepath.Join(rootPath, "blob", "blobovnicza")),
+						blobovniczatree.WithBlobovniczaShallowDepth(2),
+						blobovniczatree.WithBlobovniczaShallowWidth(2)),
+					Policy: func(_ *object.Object, data []byte) bool {
+						return len(data) <= 1<<20
+					},
+				},
+				{
+					Storage: fstree.New(
+						fstree.WithPath(filepath.Join(rootPath, "blob"))),
+				},
+			}),
 		),
 		shard.WithMetaBaseOptions(
 			meta.WithPath(filepath.Join(rootPath, "meta")),
diff --git a/pkg/local_object_storage/shard/range_test.go b/pkg/local_object_storage/shard/range_test.go
index 10769cfd..f9a66172 100644
--- a/pkg/local_object_storage/shard/range_test.go
+++ b/pkg/local_object_storage/shard/range_test.go
@@ -2,16 +2,20 @@ package shard_test
 
 import (
 	"math"
+	"path/filepath"
 	"testing"
 
 	"github.com/nspcc-dev/neo-go/pkg/util/slice"
 	"github.com/nspcc-dev/neofs-node/pkg/core/object"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor"
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/blobovniczatree"
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/fstree"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/shard"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/writecache"
 	apistatus "github.com/nspcc-dev/neofs-sdk-go/client/status"
 	objectSDK "github.com/nspcc-dev/neofs-sdk-go/object"
 	"github.com/stretchr/testify/require"
+	"go.uber.org/zap/zaptest"
 )
 
 func TestShard_GetRange(t *testing.T) {
@@ -62,7 +66,22 @@ func testShardGetRange(t *testing.T, hasWriteCache bool) {
 
 	sh := newCustomShard(t, t.TempDir(), hasWriteCache,
 		[]writecache.Option{writecache.WithMaxMemSize(0), writecache.WithMaxObjectSize(writeCacheMaxSize)},
-		[]blobstor.Option{blobstor.WithSmallSizeLimit(smallObjectSize)})
+		[]blobstor.Option{blobstor.WithStorages([]blobstor.SubStorage{
+			{
+				Storage: blobovniczatree.NewBlobovniczaTree(
+					blobovniczatree.WithLogger(zaptest.NewLogger(t)),
+					blobovniczatree.WithRootPath(filepath.Join(t.TempDir(), "blob", "blobovnicza")),
+					blobovniczatree.WithBlobovniczaShallowDepth(1),
+					blobovniczatree.WithBlobovniczaShallowWidth(1)),
+				Policy: func(_ *objectSDK.Object, data []byte) bool {
+					return len(data) <= smallObjectSize
+				},
+			},
+			{
+				Storage: fstree.New(
+					fstree.WithPath(filepath.Join(t.TempDir(), "blob"))),
+			},
+		})})
 	defer releaseShard(sh, t)
 
 	for _, tc := range testCases {
diff --git a/pkg/local_object_storage/shard/shard_test.go b/pkg/local_object_storage/shard/shard_test.go
index ed783a39..a4c91e49 100644
--- a/pkg/local_object_storage/shard/shard_test.go
+++ b/pkg/local_object_storage/shard/shard_test.go
@@ -4,12 +4,12 @@ import (
 	"crypto/sha256"
 	"math"
 	"math/rand"
-	"os"
 	"path/filepath"
-	"strings"
 	"testing"
 
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor"
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/blobovniczatree"
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/fstree"
 	meta "github.com/nspcc-dev/neofs-node/pkg/local_object_storage/metabase"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/pilorama"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/shard"
@@ -24,6 +24,7 @@ import (
 	"github.com/nspcc-dev/tzhash/tz"
 	"github.com/stretchr/testify/require"
 	"go.uber.org/zap"
+	"go.uber.org/zap/zaptest"
 )
 
 type epochState struct{}
@@ -45,15 +46,31 @@ func newCustomShard(t testing.TB, rootPath string, enableWriteCache bool, wcOpts
 		rootPath = filepath.Join(rootPath, "nowc")
 	}
 
+	if bsOpts == nil {
+		bsOpts = []blobstor.Option{
+			blobstor.WithLogger(zaptest.NewLogger(t)),
+			blobstor.WithStorages([]blobstor.SubStorage{
+				{
+					Storage: blobovniczatree.NewBlobovniczaTree(
+						blobovniczatree.WithLogger(zaptest.NewLogger(t)),
+						blobovniczatree.WithRootPath(filepath.Join(rootPath, "blob", "blobovnicza")),
+						blobovniczatree.WithBlobovniczaShallowDepth(1),
+						blobovniczatree.WithBlobovniczaShallowWidth(1)),
+					Policy: func(_ *object.Object, data []byte) bool {
+						return len(data) <= 1<<20
+					},
+				},
+				{
+					Storage: fstree.New(
+						fstree.WithPath(filepath.Join(rootPath, "blob"))),
+				},
+			}),
+		}
+	}
+
 	opts := []shard.Option{
 		shard.WithLogger(zap.L()),
-		shard.WithBlobStorOptions(
-			append([]blobstor.Option{
-				blobstor.WithRootPath(filepath.Join(rootPath, "blob")),
-				blobstor.WithBlobovniczaShallowWidth(2),
-				blobstor.WithBlobovniczaShallowDepth(2),
-			}, bsOpts...)...,
-		),
+		shard.WithBlobStorOptions(bsOpts...),
 		shard.WithMetaBaseOptions(
 			meta.WithPath(filepath.Join(rootPath, "meta")),
 			meta.WithEpochState(epochState{}),
@@ -76,8 +93,7 @@ func newCustomShard(t testing.TB, rootPath string, enableWriteCache bool, wcOpts
 }
 
 func releaseShard(s *shard.Shard, t testing.TB) {
-	s.Close()
-	os.RemoveAll(strings.Split(t.Name(), string(os.PathSeparator))[0])
+	require.NoError(t, s.Close())
 }
 
 func generateObject(t *testing.T) *object.Object {
diff --git a/pkg/local_object_storage/writecache/mode.go b/pkg/local_object_storage/writecache/mode.go
index 9f6d8bb4..38956725 100644
--- a/pkg/local_object_storage/writecache/mode.go
+++ b/pkg/local_object_storage/writecache/mode.go
@@ -27,7 +27,6 @@ func (c *cache) SetMode(m mode.Mode) error {
 		if err := c.db.Close(); err != nil {
 			return fmt.Errorf("can't close write-cache database: %w", err)
 		}
-		c.db = nil
 	}
 
 	// Suspend producers to ensure there are channel send operations in fly.