[#18] Add badgerstore substorage implementation

Signed-off-by: Alejandro Lopez <a.lopez@yadro.com>

cmd/frostfs-node/config.go

@@ -21,6 +21,7 @@ import (
 	contractsconfig "git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-node/config/contracts"
 	engineconfig "git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-node/config/engine"
 	shardconfig "git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-node/config/engine/shard"
+	badgerstoreconfig "git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-node/config/engine/shard/blobstor/badgerstore"
 	blobovniczaconfig "git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-node/config/engine/shard/blobstor/blobovnicza"
 	fstreeconfig "git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-node/config/engine/shard/blobstor/fstree"
 	loggerconfig "git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-node/config/logger"
@@ -32,6 +33,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/container"
 	netmapCore "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/netmap"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/badgerstore"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/blobovniczatree"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/fstree"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/engine"
@@ -176,6 +178,20 @@ type subStorageCfg struct {
 	width           uint64
 	leafWidth       uint64
 	openedCacheSize int
+
+	// badgerstore-specific
+	badger struct {
+		numCompactors           int
+		numGoroutines           int
+		numLevelZeroTables      int
+		numLevelZeroTablesStall int
+		numMemtables            int
+		memtableSize            int64
+		maxLevels               int
+		levelSizeMultiplier     int
+		valueLogMaxEntries      uint32
+		gcInterval              time.Duration
+	}
 }
 
 // readConfig fills applicationConfiguration with raw configuration values
@@ -291,6 +307,21 @@ func (a *applicationConfiguration) setShardStorageConfig(newConfig *shardCfg, ol
 			sCfg.width = sub.ShallowWidth()
 			sCfg.leafWidth = sub.LeafWidth()
 			sCfg.openedCacheSize = sub.OpenedCacheSize()
+
+		case badgerstore.Type:
+			sub := badgerstoreconfig.From((*config.Config)(storagesCfg[i]))
+
+			sCfg.badger.numCompactors = sub.NumCompactors()
+			sCfg.badger.numGoroutines = sub.NumGoroutines()
+			sCfg.badger.numLevelZeroTables = sub.NumLevelZeroTables()
+			sCfg.badger.numLevelZeroTablesStall = sub.NumLevelZeroTablesStall()
+			sCfg.badger.numMemtables = sub.NumMemtables()
+			sCfg.badger.memtableSize = sub.MemtableSize()
+			sCfg.badger.maxLevels = sub.MaxLevels()
+			sCfg.badger.levelSizeMultiplier = sub.LevelSizeMultiplier()
+			sCfg.badger.valueLogMaxEntries = sub.ValueLogMaxEntries()
+			sCfg.badger.gcInterval = sub.GCInterval()
+
 		case fstree.Type:
 			sub := fstreeconfig.From((*config.Config)(storagesCfg[i]))
 			sCfg.depth = sub.Depth()
@@ -797,6 +828,27 @@ func (c *cfg) getSubstorageOpts(shCfg shardCfg) []blobstor.SubStorage {
 					return uint64(len(data)) < shCfg.smallSizeObjectLimit
 				},
 			})
+		case badgerstore.Type:
+			ss = append(ss, blobstor.SubStorage{
+				Storage: badgerstore.New(
+					badgerstore.WithPath(sRead.path),
+					badgerstore.WithPermissions(sRead.perm),
+					badgerstore.WithLogger(c.log),
+					badgerstore.WithNumCompactors(sRead.badger.numCompactors),
+					badgerstore.WithNumGoroutines(sRead.badger.numGoroutines),
+					badgerstore.WithNumLevelZeroTables(sRead.badger.numLevelZeroTables),
+					badgerstore.WithNumLevelZeroTablesStall(sRead.badger.numLevelZeroTablesStall),
+					badgerstore.WithNumMemTables(sRead.badger.numMemtables),
+					badgerstore.WithMemtableSize(sRead.badger.memtableSize),
+					badgerstore.WithMaxLevels(sRead.badger.maxLevels),
+					badgerstore.WithLevelSizeMultiplier(sRead.badger.levelSizeMultiplier),
+					badgerstore.WithValueLogMaxEntries(sRead.badger.valueLogMaxEntries),
+					badgerstore.WithGCInterval(sRead.badger.gcInterval),
+				),
+				Policy: func(_ *objectSDK.Object, data []byte) bool {
+					return uint64(len(data)) < shCfg.smallSizeObjectLimit
+				},
+			})
 		case fstree.Type:
 			fstreeOpts := []fstree.Option{
 				fstree.WithPath(sRead.path),

cmd/frostfs-node/config/engine/shard/blobstor/badgerstore/config.go

@@ -0,0 +1,103 @@
+package badgerstoreconfig
+
+import (
+	"time"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-node/config"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/badgerstore"
+	"github.com/dgraph-io/badger/v4"
+)
+
+// Config is a wrapper over the config section
+// which provides access to badger configuration.
+// For information about specific parameters, see https://pkg.go.dev/github.com/dgraph-io/badger/v4.
+type Config config.Config
+
+var defaultOpts = badger.DefaultOptions("")
+
+const (
+	DefaultGCInterval = 10 * time.Second
+)
+
+func From(c *config.Config) *Config { return (*Config)(c) }
+func (x *Config) Type() string      { return badgerstore.Type }
+
+func (x *Config) NumCompactors() int {
+	s := int(config.IntSafe((*config.Config)(x), "num_compactors"))
+	if s > 0 {
+		return s
+	}
+	return defaultOpts.NumCompactors
+}
+
+func (x *Config) NumGoroutines() int {
+	s := int(config.IntSafe((*config.Config)(x), "num_goroutines"))
+	if s > 0 {
+		return s
+	}
+	return defaultOpts.NumGoroutines
+}
+
+func (x *Config) NumLevelZeroTables() int {
+	s := int(config.IntSafe((*config.Config)(x), "num_level_zero_tables"))
+	if s > 0 {
+		return s
+	}
+	return defaultOpts.NumLevelZeroTables
+}
+
+func (x *Config) NumLevelZeroTablesStall() int {
+	s := int(config.IntSafe((*config.Config)(x), "num_level_zero_tables_stall"))
+	if s > 0 {
+		return s
+	}
+	return defaultOpts.NumLevelZeroTablesStall
+}
+
+func (x *Config) NumMemtables() int {
+	s := int(config.IntSafe((*config.Config)(x), "num_memtables"))
+	if s > 0 {
+		return s
+	}
+	return defaultOpts.NumMemtables
+}
+
+func (x *Config) MemtableSize() int64 {
+	s := config.IntSafe((*config.Config)(x), "memtable_size")
+	if s > 0 {
+		return s
+	}
+	return defaultOpts.MemTableSize
+}
+
+func (x *Config) MaxLevels() int {
+	s := int(config.IntSafe((*config.Config)(x), "max_levels"))
+	if s > 0 {
+		return s
+	}
+	return defaultOpts.MaxLevels
+}
+
+func (x *Config) LevelSizeMultiplier() int {
+	s := int(config.IntSafe((*config.Config)(x), "level_size_multiplier"))
+	if s > 0 {
+		return s
+	}
+	return defaultOpts.LevelSizeMultiplier
+}
+
+func (x *Config) ValueLogMaxEntries() uint32 {
+	s := uint32(config.IntSafe((*config.Config)(x), "value_log_max_entries"))
+	if s > 0 {
+		return s
+	}
+	return defaultOpts.ValueLogMaxEntries
+}
+
+func (x *Config) GCInterval() time.Duration {
+	s := config.DurationSafe((*config.Config)(x), "gc_interval")
+	if s > 0 {
+		return s
+	}
+	return DefaultGCInterval
+}

cmd/frostfs-node/config/engine/shard/blobstor/config.go

@@ -1,10 +1,14 @@
 package blobstorconfig
 
 import (
+	"fmt"
 	"strconv"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-node/config"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-node/config/engine/shard/blobstor/storage"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/badgerstore"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/blobovniczatree"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/fstree"
 )
 
 // Config is a wrapper over the config section
@@ -23,11 +27,14 @@ func (x *Config) Storages() []*storage.Config {
 		typ := config.String(
 			(*config.Config)(x),
 			strconv.Itoa(i)+".type")
-		if typ == "" {
+		switch typ {
+		case "":
 			return ss
+		case fstree.Type, blobovniczatree.Type, badgerstore.Type:
+			sub := storage.From((*config.Config)(x).Sub(strconv.Itoa(i)))
+			ss = append(ss, sub)
+		default:
+			panic(fmt.Sprintf("invalid type: %q", typ))
 		}
-
-		sub := storage.From((*config.Config)(x).Sub(strconv.Itoa(i)))
-		ss = append(ss, sub)
 	}
 }

cmd/frostfs-node/validate.go

@@ -9,6 +9,7 @@ import (
 	shardconfig "git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-node/config/engine/shard"
 	loggerconfig "git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-node/config/logger"
 	treeconfig "git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-node/config/tree"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/badgerstore"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/blobovniczatree"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/fstree"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/logger"
@@ -55,7 +56,7 @@ func validateConfig(c *config.Config) error {
 		}
 		for i := range blobstor {
 			switch blobstor[i].Type() {
-			case fstree.Type, blobovniczatree.Type:
+			case fstree.Type, blobovniczatree.Type, badgerstore.Type:
 			default:
 				return fmt.Errorf("unexpected storage type: %s (shard %d)", blobstor[i].Type(), shardNum)
 			}

pkg/local_object_storage/blobstor/badgerstore/badgerstore.go

@@ -0,0 +1,201 @@
+package badgerstore
+
+import (
+	"context"
+	"fmt"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/common"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/util/logicerr"
+	apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
+	objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
+	"github.com/dgraph-io/badger/v4"
+)
+
+const (
+	Type = "badgerstore"
+)
+
+type badgerstoreImpl struct {
+	*cfg
+	db      *badger.DB
+	closeCh chan struct{}
+}
+
+func New(opts ...Option) common.Storage {
+	st := &badgerstoreImpl{
+		cfg: defaultConfig(),
+	}
+
+	for _, opt := range opts {
+		opt(st.cfg)
+	}
+
+	st.badgerOptions = st.badgerOptions.WithDir(st.cfg.path)
+	st.badgerOptions = st.badgerOptions.WithValueDir(st.cfg.path)
+
+	return st
+}
+
+func (s *badgerstoreImpl) Get(_ context.Context, req common.GetPrm) (common.GetRes, error) {
+	addrKey := addressKey(req.Address)
+
+	var data []byte
+
+	if err := s.db.View(func(tx *badger.Txn) error {
+		it, err := tx.Get(addrKey[:])
+		if err != nil {
+			return err
+		}
+		data, err = it.ValueCopy(nil)
+		return err
+	}); err != nil {
+		if err == badger.ErrKeyNotFound {
+			return common.GetRes{}, logicerr.Wrap(new(apistatus.ObjectNotFound))
+		}
+		return common.GetRes{}, err
+	}
+
+	var err error
+	if data, err = s.compression.Decompress(data); err != nil {
+		return common.GetRes{}, fmt.Errorf("could not decompress object data: %w", err)
+	}
+
+	obj := objectSDK.New()
+	if err := obj.Unmarshal(data); err != nil {
+		return common.GetRes{}, fmt.Errorf("could not unmarshal the object: %w", err)
+	}
+
+	return common.GetRes{Object: obj, RawData: data}, nil
+}
+
+func (s *badgerstoreImpl) GetRange(ctx context.Context, req common.GetRangePrm) (common.GetRangeRes, error) {
+	getResp, err := s.Get(ctx, common.GetPrm{
+		Address:   req.Address,
+		StorageID: req.StorageID,
+	})
+	if err != nil {
+		return common.GetRangeRes{}, err
+	}
+
+	payload := getResp.Object.Payload()
+	from := req.Range.GetOffset()
+	to := from + req.Range.GetLength()
+
+	if pLen := uint64(len(payload)); to < from || pLen < from || pLen < to {
+		return common.GetRangeRes{}, logicerr.Wrap(new(apistatus.ObjectOutOfRange))
+	}
+
+	return common.GetRangeRes{
+		Data: payload[from:to],
+	}, nil
+}
+
+func (s *badgerstoreImpl) Exists(_ context.Context, req common.ExistsPrm) (common.ExistsRes, error) {
+	addrKey := addressKey(req.Address)
+	exists := true
+
+	if err := s.db.View(func(tx *badger.Txn) error {
+		_, err := tx.Get(addrKey[:])
+		if err == badger.ErrKeyNotFound {
+			exists = false
+			return nil
+		}
+		return err
+	}); err != nil {
+		return common.ExistsRes{}, err
+	}
+
+	return common.ExistsRes{Exists: exists}, nil
+}
+
+func (s *badgerstoreImpl) Put(_ context.Context, req common.PutPrm) (common.PutRes, error) {
+	if s.badgerOptions.ReadOnly {
+		return common.PutRes{}, common.ErrReadOnly
+	}
+	if !req.DontCompress {
+		req.RawData = s.compression.Compress(req.RawData)
+	}
+
+	addrKey := addressKey(req.Address)
+
+	wb := s.db.NewWriteBatch()
+	defer wb.Cancel()
+	_ = wb.Set(addrKey[:], req.RawData)
+	return common.PutRes{}, wb.Flush()
+}
+
+func (s *badgerstoreImpl) Delete(_ context.Context, req common.DeletePrm) (common.DeleteRes, error) {
+	if s.badgerOptions.ReadOnly {
+		return common.DeleteRes{}, common.ErrReadOnly
+	}
+
+	addrKey := addressKey(req.Address)
+
+	err := s.db.Update(func(tx *badger.Txn) error {
+		if _, err := tx.Get(addrKey[:]); err != nil {
+			return err
+		}
+		return tx.Delete(addrKey[:])
+	})
+
+	if err == badger.ErrKeyNotFound {
+		err = logicerr.Wrap(new(apistatus.ObjectNotFound))
+	}
+
+	return common.DeleteRes{}, err
+}
+
+func (s *badgerstoreImpl) iterateKeyValue(req common.IteratePrm, k, v []byte) error {
+	elem := common.IterationElement{
+		ObjectData: v,
+	}
+	if err := decodeAddress(k, &elem.Address); err != nil {
+		if req.IgnoreErrors {
+			return nil
+		}
+		return logicerr.Wrap(fmt.Errorf("(%T) decoding address string %q: %v", s, string(k), err))
+	}
+	var err error
+	if elem.ObjectData, err = s.compression.Decompress(elem.ObjectData); err != nil {
+		if req.IgnoreErrors {
+			if req.ErrorHandler != nil {
+				return req.ErrorHandler(elem.Address, err)
+			}
+			return nil
+		}
+		return logicerr.Wrap(fmt.Errorf("(%T) decompressing data for address %q: %v", s, elem.Address.String(), err))
+	}
+	switch {
+	case req.Handler != nil:
+		if err := req.Handler(elem); err != nil {
+			return err
+		}
+	case req.LazyHandler != nil:
+		if err := req.LazyHandler(elem.Address, func() ([]byte, error) { return elem.ObjectData, nil }); err != nil {
+			return err
+		}
+	default:
+		if !req.IgnoreErrors {
+			return logicerr.Wrap(fmt.Errorf("(%T) no Handler or LazyHandler set for IteratePrm", s))
+		}
+	}
+
+	return nil
+}
+
+func (s *badgerstoreImpl) Iterate(_ context.Context, req common.IteratePrm) (common.IterateRes, error) {
+	err := s.db.View(func(tx *badger.Txn) error {
+		it := tx.NewIterator(badger.DefaultIteratorOptions)
+		defer it.Close()
+		for it.Rewind(); it.Valid(); it.Next() {
+			if err := it.Item().Value(func(val []byte) error {
+				return s.iterateKeyValue(req, it.Item().Key(), val)
+			}); err != nil {
+				return err
+			}
+		}
+		return nil
+	})
+
+	return common.IterateRes{}, err
+}

pkg/local_object_storage/blobstor/badgerstore/badgerstore_test.go

@@ -0,0 +1,23 @@
+package badgerstore
+
+import (
+	"path/filepath"
+	"testing"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/common"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/internal/blobstortest"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/logger"
+	"go.uber.org/zap/zaptest"
+)
+
+func TestGeneric(t *testing.T) {
+	ctor := func(t *testing.T) common.Storage {
+		return New(
+			WithPath(filepath.Join(t.TempDir(), "badgerstore")),
+			WithLogger(&logger.Logger{Logger: zaptest.NewLogger(t)}),
+			WithGCInterval(10),
+		)
+	}
+
+	blobstortest.TestAll(t, ctor, 2048, 16*1024)
+}

pkg/local_object_storage/blobstor/badgerstore/control.go

@@ -0,0 +1,49 @@
+package badgerstore
+
+import (
+	"time"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/compression"
+	"github.com/dgraph-io/badger/v4"
+)
+
+func (s *badgerstoreImpl) Open(readOnly bool) (err error) {
+	s.badgerOptions = s.badgerOptions.WithReadOnly(readOnly)
+	s.db, err = badger.Open(s.badgerOptions)
+	return
+}
+
+func (s *badgerstoreImpl) gc() {
+	t := time.NewTicker(s.gcInterval)
+	defer t.Stop()
+	for {
+		select {
+		case <-s.closeCh:
+			return
+		case <-t.C:
+			for {
+				if err := s.db.RunValueLogGC(0.5); err != nil {
+					break
+				}
+			}
+		}
+	}
+}
+
+func (s *badgerstoreImpl) Init() error {
+	s.closeCh = make(chan struct{})
+	go s.gc()
+	return nil
+}
+
+func (s *badgerstoreImpl) Close() error {
+	close(s.closeCh)
+	return s.db.Close()
+}
+
+func (s *badgerstoreImpl) Type() string                             { return Type }
+func (s *badgerstoreImpl) Path() string                             { return s.path }
+func (s *badgerstoreImpl) SetCompressor(cc *compression.Config)     { s.compression = cc }
+func (s *badgerstoreImpl) Compressor() *compression.Config          { return s.compression }
+func (s *badgerstoreImpl) SetReportErrorFunc(f func(string, error)) { s.reportError = f }
+func (s *badgerstoreImpl) SetParentID(string)                       {}

pkg/local_object_storage/blobstor/badgerstore/internal_key.go

@@ -0,0 +1,31 @@
+package badgerstore
+
+import (
+	"fmt"
+
+	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
+	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
+)
+
+type internalKey [len(cid.ID{}) + len(oid.ID{})]byte
+
+func decodeAddress(k []byte, addr *oid.Address) error {
+	if got, want := len(k), len(internalKey{}); got != want {
+		return fmt.Errorf("unexpected internal key len: got %d, want %d", got, want)
+	}
+	var cnr cid.ID
+	var obj oid.ID
+	copy(cnr[:], k[:len(cnr)])
+	copy(obj[:], k[len(cnr):])
+	addr.SetContainer(cnr)
+	addr.SetObject(obj)
+	return nil
+}
+
+func addressKey(addr oid.Address) internalKey {
+	var key internalKey
+	cnr, obj := addr.Container(), addr.Object()
+	copy(key[:len(cnr)], cnr[:])
+	copy(key[len(cnr):], obj[:])
+	return key
+}

pkg/local_object_storage/blobstor/badgerstore/internal_key_test.go

@@ -0,0 +1,18 @@
+package badgerstore
+
+import (
+	"testing"
+
+	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
+	oidtest "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id/test"
+	"github.com/stretchr/testify/require"
+)
+
+func TestInternalKey(t *testing.T) {
+	wantAddr := oidtest.Address()
+	k := addressKey(wantAddr)
+	var gotAddr oid.Address
+
+	require.NoError(t, decodeAddress(k[:], &gotAddr))
+	require.True(t, gotAddr.Equals(wantAddr))
+}

pkg/local_object_storage/blobstor/badgerstore/option.go

@@ -0,0 +1,117 @@
+package badgerstore
+
+import (
+	"io/fs"
+	"os"
+	"time"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/compression"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/logger"
+	"github.com/dgraph-io/badger/v4"
+	"go.uber.org/zap"
+)
+
+type cfg struct {
+	path          string
+	perm          fs.FileMode
+	log           *logger.Logger
+	badgerOptions badger.Options
+	compression   *compression.Config
+	reportError   func(string, error)
+	gcInterval    time.Duration
+}
+
+func defaultConfig() *cfg {
+	return &cfg{
+		perm:          os.ModePerm, // 0777
+		log:           &logger.Logger{Logger: zap.L()},
+		reportError:   func(string, error) {},
+		badgerOptions: badger.DefaultOptions(""),
+	}
+}
+
+type Option func(*cfg)
+
+func WithLogger(l *logger.Logger) Option {
+	return func(c *cfg) {
+		c.log = l
+	}
+}
+
+func WithPath(p string) Option {
+	return func(c *cfg) {
+		c.path = p
+	}
+}
+
+func WithReadOnly(ro bool) Option {
+	return func(c *cfg) {
+		c.badgerOptions = c.badgerOptions.WithReadOnly(ro)
+	}
+}
+
+func WithPermissions(perm fs.FileMode) Option {
+	return func(c *cfg) {
+		c.perm = perm
+	}
+}
+
+func WithNumCompactors(v int) Option {
+	return func(c *cfg) {
+		c.badgerOptions.NumCompactors = v
+	}
+}
+
+func WithNumGoroutines(v int) Option {
+	return func(c *cfg) {
+		c.badgerOptions.NumGoroutines = v
+	}
+}
+
+func WithNumLevelZeroTables(v int) Option {
+	return func(c *cfg) {
+		c.badgerOptions.NumLevelZeroTables = v
+	}
+}
+
+func WithNumLevelZeroTablesStall(v int) Option {
+	return func(c *cfg) {
+		c.badgerOptions.NumLevelZeroTablesStall = v
+	}
+}
+
+func WithNumMemTables(v int) Option {
+	return func(c *cfg) {
+		c.badgerOptions.NumMemtables = v
+	}
+}
+
+func WithMemtableSize(v int64) Option {
+	return func(c *cfg) {
+		c.badgerOptions.MemTableSize = v
+	}
+}
+
+func WithMaxLevels(v int) Option {
+	return func(c *cfg) {
+		c.badgerOptions.MaxLevels = v
+	}
+}
+
+func WithLevelSizeMultiplier(v int) Option {
+	return func(c *cfg) {
+		c.badgerOptions.LevelSizeMultiplier = v
+	}
+}
+
+func WithValueLogMaxEntries(v uint32) Option {
+	return func(c *cfg) {
+		c.badgerOptions.ValueLogMaxEntries = v
+	}
+}
+
+func WithGCInterval(v time.Duration) Option {
+	return func(c *cfg) {
+		c.gcInterval = v
+	}
+}