[#661] blobovniczatree: Allow to change depth or width

Now it is possible to change depth or with of blobovniczatree.

Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>

pkg/local_object_storage/blobstor/blobovniczatree/blobovnicza.go

@@ -81,7 +81,7 @@ func NewBlobovniczaTree(opts ...Option) (blz *Blobovniczas) {
 		blz.blzLeafWidth = blz.blzShallowWidth
 	}
 
-	blz.commondbManager = newDBManager(blz.rootPath, blz.blzOpts, blz.blzLeafWidth, blz.readOnly, blz.metrics.Blobovnicza(), blz.log)
+	blz.commondbManager = newDBManager(blz.rootPath, blz.blzOpts, blz.readOnly, blz.metrics.Blobovnicza(), blz.log)
 	blz.activeDBManager = newActiveDBManager(blz.commondbManager, blz.blzLeafWidth)
 	blz.dbCache = newDBCache(blz.openedCacheSize, blz.commondbManager)
 

pkg/local_object_storage/blobstor/blobovniczatree/control.go

@@ -8,6 +8,7 @@ import (
 	"strings"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util"
 	"go.uber.org/zap"
 )
 
@@ -39,7 +40,36 @@ func (b *Blobovniczas) Init() error {
 		return nil
 	}
 
-	return b.iterateLeaves(context.TODO(), func(p string) (bool, error) {
+	return b.initializeDBs(context.TODO())
+}
+
+func (b *Blobovniczas) initializeDBs(ctx context.Context) error {
+	err := util.MkdirAllX(b.rootPath, b.perm)
+	if err != nil {
+		return err
+	}
+
+	visited := make(map[string]struct{})
+	err = b.iterateExistingDBPaths(ctx, func(p string) (bool, error) {
+		visited[p] = struct{}{}
+		shBlz := b.getBlobovniczaWithoutCaching(p)
+		_, err := shBlz.Open()
+		if err != nil {
+			return true, err
+		}
+		defer shBlz.Close()
+
+		b.log.Debug(logs.BlobovniczatreeBlobovniczaSuccessfullyInitializedClosing, zap.String("id", p))
+		return false, nil
+	})
+	if err != nil {
+		return err
+	}
+
+	return b.iterateSortedLeaves(ctx, nil, func(p string) (bool, error) {
+		if _, found := visited[p]; found {
+			return false, nil
+		}
 		shBlz := b.getBlobovniczaWithoutCaching(p)
 		_, err := shBlz.Open()
 		if err != nil {

pkg/local_object_storage/blobstor/blobovniczatree/control_test.go

@@ -1,12 +1,16 @@
 package blobovniczatree
 
 import (
+	"context"
 	"os"
 	"path/filepath"
 	"strings"
 	"testing"
 
+	objectCore "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/object"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobovnicza"
+	"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"
 	"github.com/stretchr/testify/require"
 )
 
@@ -67,3 +71,119 @@ func validateTestTree(t *testing.T, path string) {
 		}
 	}
 }
+
+func TestObjectsAvailableAfterDepthAndWidthEdit(t *testing.T) {
+	t.Parallel()
+
+	rootDir := t.TempDir()
+
+	blz := NewBlobovniczaTree(
+		WithBlobovniczaShallowDepth(3),
+		WithBlobovniczaShallowWidth(5),
+		WithRootPath(rootDir),
+	)
+
+	require.NoError(t, blz.Open(false))
+	require.NoError(t, blz.Init())
+
+	obj35 := blobstortest.NewObject(10 * 1024)
+	addr35 := objectCore.AddressOf(obj35)
+	raw, err := obj35.Marshal()
+	require.NoError(t, err)
+
+	pRes35, err := blz.Put(context.Background(), common.PutPrm{
+		Address: addr35,
+		Object:  obj35,
+		RawData: raw,
+	})
+	require.NoError(t, err)
+
+	gRes, err := blz.Get(context.Background(), common.GetPrm{
+		Address:   addr35,
+		StorageID: pRes35.StorageID,
+	})
+	require.NoError(t, err)
+	require.EqualValues(t, obj35, gRes.Object)
+
+	gRes, err = blz.Get(context.Background(), common.GetPrm{
+		Address: addr35,
+	})
+	require.NoError(t, err)
+	require.EqualValues(t, obj35, gRes.Object)
+
+	require.NoError(t, blz.Close())
+
+	// change depth and width
+	blz = NewBlobovniczaTree(
+		WithBlobovniczaShallowDepth(5),
+		WithBlobovniczaShallowWidth(2),
+		WithRootPath(rootDir),
+	)
+
+	require.NoError(t, blz.Open(false))
+	require.NoError(t, blz.Init())
+
+	gRes, err = blz.Get(context.Background(), common.GetPrm{
+		Address:   addr35,
+		StorageID: pRes35.StorageID,
+	})
+	require.NoError(t, err)
+	require.EqualValues(t, obj35, gRes.Object)
+
+	gRes, err = blz.Get(context.Background(), common.GetPrm{
+		Address: addr35,
+	})
+	require.NoError(t, err)
+	require.EqualValues(t, obj35, gRes.Object)
+
+	obj52 := blobstortest.NewObject(10 * 1024)
+	addr52 := objectCore.AddressOf(obj52)
+	raw, err = obj52.Marshal()
+	require.NoError(t, err)
+
+	pRes52, err := blz.Put(context.Background(), common.PutPrm{
+		Address: addr52,
+		Object:  obj52,
+		RawData: raw,
+	})
+	require.NoError(t, err)
+
+	require.NoError(t, blz.Close())
+
+	// change depth and width back
+	blz = NewBlobovniczaTree(
+		WithBlobovniczaShallowDepth(3),
+		WithBlobovniczaShallowWidth(5),
+		WithRootPath(rootDir),
+	)
+	require.NoError(t, blz.Open(false))
+	require.NoError(t, blz.Init())
+
+	gRes, err = blz.Get(context.Background(), common.GetPrm{
+		Address:   addr35,
+		StorageID: pRes35.StorageID,
+	})
+	require.NoError(t, err)
+	require.EqualValues(t, obj35, gRes.Object)
+
+	gRes, err = blz.Get(context.Background(), common.GetPrm{
+		Address: addr35,
+	})
+	require.NoError(t, err)
+	require.EqualValues(t, obj35, gRes.Object)
+
+	gRes, err = blz.Get(context.Background(), common.GetPrm{
+		Address:   addr52,
+		StorageID: pRes52.StorageID,
+	})
+	require.NoError(t, err)
+	require.EqualValues(t, obj52, gRes.Object)
+
+	gRes, err = blz.Get(context.Background(), common.GetPrm{
+		Address: addr52,
+	})
+	require.NoError(t, err)
+	require.EqualValues(t, obj52, gRes.Object)
+
+	require.NoError(t, blz.Close())
+}

pkg/local_object_storage/blobstor/blobovniczatree/delete.go

@@ -63,7 +63,7 @@ func (b *Blobovniczas) Delete(ctx context.Context, prm common.DeletePrm) (res co
 
 	objectFound := false
 
-	err = b.iterateSortedLeaves(ctx, &prm.Address, func(p string) (bool, error) {
+	err = b.iterateSortedDBPaths(ctx, prm.Address, func(p string) (bool, error) {
 		res, err = b.deleteObjectFromLevel(ctx, bPrm, p)
 		if err != nil {
 			if !client.IsErrObjectNotFound(err) {

pkg/local_object_storage/blobstor/blobovniczatree/exists.go

@@ -51,7 +51,7 @@ func (b *Blobovniczas) Exists(ctx context.Context, prm common.ExistsPrm) (common
 	var gPrm blobovnicza.GetPrm
 	gPrm.SetAddress(prm.Address)
 
-	err := b.iterateSortedLeaves(ctx, &prm.Address, func(p string) (bool, error) {
+	err := b.iterateSortedDBPaths(ctx, prm.Address, func(p string) (bool, error) {
 		_, err := b.getObjectFromLevel(ctx, gPrm, p)
 		if err != nil {
 			if !client.IsErrObjectNotFound(err) {

pkg/local_object_storage/blobstor/blobovniczatree/get.go

@@ -63,7 +63,7 @@ func (b *Blobovniczas) Get(ctx context.Context, prm common.GetPrm) (res common.G
 		return res, err
 	}
 
-	err = b.iterateSortedLeaves(ctx, &prm.Address, func(p string) (bool, error) {
+	err = b.iterateSortedDBPaths(ctx, prm.Address, func(p string) (bool, error) {
 		res, err = b.getObjectFromLevel(ctx, bPrm, p)
 		if err != nil {
 			if !client.IsErrObjectNotFound(err) {

pkg/local_object_storage/blobstor/blobovniczatree/get_range.go

@@ -64,7 +64,7 @@ func (b *Blobovniczas) GetRange(ctx context.Context, prm common.GetRangePrm) (re
 
 	objectFound := false
 
-	err = b.iterateSortedLeaves(ctx, &prm.Address, func(p string) (bool, error) {
+	err = b.iterateSortedDBPaths(ctx, prm.Address, func(p string) (bool, error) {
 		res, err = b.getRangeFromLevel(ctx, prm, p)
 		if err != nil {
 			outOfBounds := isErrOutOfRange(err)

pkg/local_object_storage/blobstor/blobovniczatree/iterate.go

@@ -3,6 +3,7 @@ package blobovniczatree
 import (
 	"context"
 	"fmt"
+	"os"
 	"path/filepath"
 	"strings"
 	"time"
@@ -70,7 +71,7 @@ func (b *Blobovniczas) Iterate(ctx context.Context, prm common.IteratePrm) (comm
 
 // iterator over all Blobovniczas in unsorted order. Break on f's error return.
 func (b *Blobovniczas) iterateBlobovniczas(ctx context.Context, ignoreErrors bool, f func(string, *blobovnicza.Blobovnicza) error) error {
-	return b.iterateLeaves(ctx, func(p string) (bool, error) {
+	return b.iterateExistingDBPaths(ctx, func(p string) (bool, error) {
 		shBlz := b.getBlobovnicza(p)
 		blz, err := shBlz.Open()
 		if err != nil {
@@ -91,7 +92,9 @@ func (b *Blobovniczas) iterateBlobovniczas(ctx context.Context, ignoreErrors boo
 	})
 }
 
-// iterator over the paths of Blobovniczas sorted by weight.
+// iterateSortedLeaves iterates over the paths of Blobovniczas sorted by weight.
+//
+// Uses depth, width and leaf width for iteration.
 func (b *Blobovniczas) iterateSortedLeaves(ctx context.Context, addr *oid.Address, f func(string) (bool, error)) error {
 	_, err := b.iterateSorted(
 		ctx,
@@ -169,9 +172,105 @@ func (b *Blobovniczas) iterateSorted(ctx context.Context, addr *oid.Address, cur
 	return false, nil
 }
 
-// iterator over the paths of Blobovniczas in random order.
+// iterateExistingDBPaths iterates over the paths of Blobovniczas without any order.
-func (b *Blobovniczas) iterateLeaves(ctx context.Context, f func(string) (bool, error)) error {
+//
-	return b.iterateSortedLeaves(ctx, nil, f)
+// Uses existed blobovnicza files for iteration.
+func (b *Blobovniczas) iterateExistingDBPaths(ctx context.Context, f func(string) (bool, error)) error {
+	_, err := b.iterateExistingDBPathsDFS(ctx, "", f)
+	return err
+}
+
+func (b *Blobovniczas) iterateExistingDBPathsDFS(ctx context.Context, path string, f func(string) (bool, error)) (bool, error) {
+	sysPath := filepath.Join(b.rootPath, path)
+	entries, err := os.ReadDir(sysPath)
+	if os.IsNotExist(err) && b.readOnly && path == "" { // non initialized tree in read only mode
+		return false, nil
+	}
+	if err != nil {
+		return false, err
+	}
+	for _, entry := range entries {
+		select {
+		case <-ctx.Done():
+			return false, ctx.Err()
+		default:
+		}
+		if entry.IsDir() {
+			stop, err := b.iterateExistingDBPathsDFS(ctx, filepath.Join(path, entry.Name()), f)
+			if err != nil {
+				return false, err
+			}
+			if stop {
+				return true, nil
+			}
+		} else {
+			stop, err := f(filepath.Join(path, entry.Name()))
+			if err != nil {
+				return false, err
+			}
+			if stop {
+				return true, nil
+			}
+		}
+	}
+	return false, nil
+}
+
+func (b *Blobovniczas) iterateSortedDBPaths(ctx context.Context, addr oid.Address, f func(string) (bool, error)) error {
+	_, err := b.iterateSordedDBPathsInternal(ctx, "", addr, f)
+	return err
+}
+
+func (b *Blobovniczas) iterateSordedDBPathsInternal(ctx context.Context, path string, addr oid.Address, f func(string) (bool, error)) (bool, error) {
+	sysPath := filepath.Join(b.rootPath, path)
+	entries, err := os.ReadDir(sysPath)
+	if os.IsNotExist(err) && b.readOnly && path == "" { // non initialized tree in read only mode
+		return false, nil
+	}
+	if err != nil {
+		return false, err
+	}
+	var dbIdxs []uint64
+	var dirIdxs []uint64
+
+	for _, entry := range entries {
+		idx := u64FromHexString(entry.Name())
+		if entry.IsDir() {
+			dirIdxs = append(dirIdxs, idx)
+		} else {
+			dbIdxs = append(dbIdxs, idx)
+		}
+	}
+
+	if len(dbIdxs) > 0 {
+		hrw.SortSliceByValue(dbIdxs, addressHash(&addr, path))
+		for _, dbIdx := range dbIdxs {
+			dbPath := filepath.Join(path, u64ToHexStringExt(dbIdx))
+			stop, err := f(dbPath)
+			if err != nil {
+				return false, err
+			}
+			if stop {
+				return true, nil
+			}
+		}
+	}
+
+	if len(dirIdxs) > 0 {
+		hrw.SortSliceByValue(dirIdxs, addressHash(&addr, path))
+		for _, dirIdx := range dirIdxs {
+			dirPath := filepath.Join(path, u64ToHexString(dirIdx))
+			stop, err := b.iterateSordedDBPathsInternal(ctx, dirPath, addr, f)
+			if err != nil {
+				return false, err
+			}
+			if stop {
+				return true, nil
+			}
+		}
+	}
+
+	return false, nil
 }
 
 // makes slice of uint64 values from 0 to number-1.

pkg/local_object_storage/blobstor/blobovniczatree/iterate_test.go

@@ -0,0 +1,41 @@
+package blobovniczatree
+
+import (
+	"context"
+	"testing"
+
+	oidtest "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id/test"
+	"github.com/stretchr/testify/require"
+)
+
+func TestIterateSortedLeavesAndDBPathsAreSame(t *testing.T) {
+	t.Parallel()
+
+	blz := NewBlobovniczaTree(
+		WithBlobovniczaShallowDepth(3),
+		WithBlobovniczaShallowWidth(5),
+		WithRootPath(t.TempDir()),
+	)
+	require.NoError(t, blz.Open(false))
+	require.NoError(t, blz.Init())
+	defer func() {
+		require.NoError(t, blz.Close())
+	}()
+
+	addr := oidtest.Address()
+
+	var leaves []string
+	var dbPaths []string
+
+	blz.iterateSortedLeaves(context.Background(), &addr, func(s string) (bool, error) {
+		leaves = append(leaves, s)
+		return false, nil
+	})
+
+	blz.iterateSortedDBPaths(context.Background(), addr, func(s string) (bool, error) {
+		dbPaths = append(dbPaths, s)
+		return false, nil
+	})
+
+	require.Equal(t, leaves, dbPaths)
+}

pkg/local_object_storage/blobstor/blobovniczatree/manager.go

@@ -107,25 +107,65 @@ func (b *sharedDB) Path() string {
 
 // levelDbManager stores pointers of the sharedDB's for the leaf directory of the blobovnicza tree.
 type levelDbManager struct {
-	databases []*sharedDB
+	dbMtx     *sync.RWMutex
+	databases map[uint64]*sharedDB
+
+	options       []blobovnicza.Option
+	path          string
+	readOnly      bool
+	metrics       blobovnicza.Metrics
+	openDBCounter *openDBCounter
+	closedFlag    *atomic.Bool
+	log           *logger.Logger
 }
 
-func newLevelDBManager(width uint64, options []blobovnicza.Option, rootPath string, lvlPath string,
+func newLevelDBManager(options []blobovnicza.Option, rootPath string, lvlPath string,
-	readOnly bool, metrics blobovnicza.Metrics, openDBCounter *openDBCounter, closedFlog *atomic.Bool, log *logger.Logger,
+	readOnly bool, metrics blobovnicza.Metrics, openDBCounter *openDBCounter, closedFlag *atomic.Bool, log *logger.Logger,
 ) *levelDbManager {
 	result := &levelDbManager{
-		databases: make([]*sharedDB, width),
+		databases: make(map[uint64]*sharedDB),
-	}
+		dbMtx:     &sync.RWMutex{},
-	for idx := uint64(0); idx < width; idx++ {
+
-		result.databases[idx] = newSharedDB(options, filepath.Join(rootPath, lvlPath, u64ToHexStringExt(idx)), readOnly, metrics, openDBCounter, closedFlog, log)
+		options:       options,
+		path:          filepath.Join(rootPath, lvlPath),
+		readOnly:      readOnly,
+		metrics:       metrics,
+		openDBCounter: openDBCounter,
+		closedFlag:    closedFlag,
+		log:           log,
 	}
 	return result
 }
 
 func (m *levelDbManager) GetByIndex(idx uint64) *sharedDB {
+	res := m.getDBIfExists(idx)
+	if res != nil {
+		return res
+	}
+	return m.getOrCreateDB(idx)
+}
+
+func (m *levelDbManager) getDBIfExists(idx uint64) *sharedDB {
+	m.dbMtx.RLock()
+	defer m.dbMtx.RUnlock()
+
 	return m.databases[idx]
 }
 
+func (m *levelDbManager) getOrCreateDB(idx uint64) *sharedDB {
+	m.dbMtx.Lock()
+	defer m.dbMtx.Unlock()
+
+	db := m.databases[idx]
+	if db != nil {
+		return db
+	}
+
+	db = newSharedDB(m.options, filepath.Join(m.path, u64ToHexStringExt(idx)), m.readOnly, m.metrics, m.openDBCounter, m.closedFlag, m.log)
+	m.databases[idx] = db
+	return db
+}
+
 // dbManager manages the opening and closing of blobovnicza instances.
 //
 // The blobovnicza opens at the first request, closes after the last request.
@@ -139,17 +179,15 @@ type dbManager struct {
 	options  []blobovnicza.Option
 	readOnly bool
 	metrics  blobovnicza.Metrics
-	leafWidth uint64
 	log      *logger.Logger
 }
 
-func newDBManager(rootPath string, options []blobovnicza.Option, leafWidth uint64, readOnly bool, metrics blobovnicza.Metrics, log *logger.Logger) *dbManager {
+func newDBManager(rootPath string, options []blobovnicza.Option, readOnly bool, metrics blobovnicza.Metrics, log *logger.Logger) *dbManager {
 	return &dbManager{
 		rootPath:            rootPath,
 		options:             options,
 		readOnly:            readOnly,
 		metrics:             metrics,
-		leafWidth:           leafWidth,
 		levelToManager:      make(map[string]*levelDbManager),
 		levelToManagerGuard: &sync.RWMutex{},
 		log:                 log,
@@ -197,7 +235,7 @@ func (m *dbManager) getOrCreateLevelManager(lvlPath string) *levelDbManager {
 		return result
 	}
 
-	result := newLevelDBManager(m.leafWidth, m.options, m.rootPath, lvlPath, m.readOnly, m.metrics, m.dbCounter, m.closedFlag, m.log)
+	result := newLevelDBManager(m.options, m.rootPath, lvlPath, m.readOnly, m.metrics, m.dbCounter, m.closedFlag, m.log)
 	m.levelToManager[lvlPath] = result
 	return result
 }