[#661] blobovniczatree: Do not create DB's on init

Blobovniczas will be created on write requests.

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

cmd/frostfs-node/config.go

@@ -178,6 +178,7 @@ type subStorageCfg struct {
 	leafWidth       uint64
 	openedCacheSize int
 	initWorkerCount int
+	initInAdvance   bool
 }
 
 // readConfig fills applicationConfiguration with raw configuration values
@@ -295,6 +296,7 @@ func (a *applicationConfiguration) setShardStorageConfig(newConfig *shardCfg, ol
 			sCfg.leafWidth = sub.LeafWidth()
 			sCfg.openedCacheSize = sub.OpenedCacheSize()
 			sCfg.initWorkerCount = sub.InitWorkerCount()
+			sCfg.initInAdvance = sub.InitInAdvance()
 		case fstree.Type:
 			sub := fstreeconfig.From((*config.Config)(storagesCfg[i]))
 			sCfg.depth = sub.Depth()
@@ -786,6 +788,7 @@ func (c *cfg) getSubstorageOpts(shCfg shardCfg) []blobstor.SubStorage {
 				blobovniczatree.WithBlobovniczaLeafWidth(sRead.leafWidth),
 				blobovniczatree.WithOpenedCacheSize(sRead.openedCacheSize),
 				blobovniczatree.WithInitWorkerCount(sRead.initWorkerCount),
+				blobovniczatree.WithInitInAdvance(sRead.initInAdvance),
 				blobovniczatree.WithLogger(c.log),
 				blobovniczatree.WithObjectSizeLimit(shCfg.smallSizeObjectLimit),
 			}

cmd/frostfs-node/config/engine/config_test.go

@@ -98,6 +98,7 @@ func TestEngineSection(t *testing.T) {
 				require.EqualValues(t, 50, blz.OpenedCacheSize())
 				require.EqualValues(t, 10, blz.LeafWidth())
 				require.EqualValues(t, 10, blz.InitWorkerCount())
+				require.EqualValues(t, true, blz.InitInAdvance())
 
 				require.Equal(t, "tmp/0/blob", ss[1].Path())
 				require.EqualValues(t, 0o644, ss[1].Perm())

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

@@ -131,3 +131,13 @@ func (x *Config) InitWorkerCount() int {
 
 	return InitWorkerCountDefault
 }
+
+// InitInAdvance returns the value of "init_in_advance" config parameter.
+//
+// Returns False if the value is not defined or invalid.
+func (x *Config) InitInAdvance() bool {
+	return config.BoolSafe(
+		(*config.Config)(x),
+		"init_in_advance",
+	)
+}

config/example/node.env

@@ -125,6 +125,7 @@ FROSTFS_STORAGE_SHARD_0_BLOBSTOR_0_WIDTH=4
 FROSTFS_STORAGE_SHARD_0_BLOBSTOR_0_OPENED_CACHE_CAPACITY=50
 FROSTFS_STORAGE_SHARD_0_BLOBSTOR_0_LEAF_WIDTH=10
 FROSTFS_STORAGE_SHARD_0_BLOBSTOR_0_INIT_WORKER_COUNT=10
+FROSTFS_STORAGE_SHARD_0_BLOBSTOR_0_INIT_IN_ADVANCE=TRUE
 ### FSTree config
 FROSTFS_STORAGE_SHARD_0_BLOBSTOR_1_TYPE=fstree
 FROSTFS_STORAGE_SHARD_0_BLOBSTOR_1_PATH=tmp/0/blob

config/example/node.json

@@ -172,7 +172,8 @@
             "width": 4,
             "opened_cache_capacity": 50,
             "leaf_width": 10,
-            "init_worker_count": 10
+            "init_worker_count": 10,
+            "init_in_advance": true
           },
           {
             "type": "fstree",

config/example/node.yaml

@@ -184,6 +184,7 @@ storage:
         - type: blobovnicza
           path: tmp/0/blob/blobovnicza
           init_worker_count: 10 #count of workers to initialize blobovniczas
+          init_in_advance: true
         - type: fstree
           path: tmp/0/blob  # blobstor path
 

pkg/local_object_storage/blobstor/blobovniczatree/control.go

@@ -82,6 +82,7 @@ func (b *Blobovniczas) initializeDBs(ctx context.Context) error {
 		return err
 	}
 
+	if b.createDBInAdvance {
 		err = b.iterateSortedLeaves(egCtx, nil, func(p string) (bool, error) {
 			if _, found := visited[p]; found {
 				return false, nil
@@ -104,6 +105,7 @@ func (b *Blobovniczas) initializeDBs(ctx context.Context) error {
 			_ = eg.Wait()
 			return err
 		}
+	}
 
 	return eg.Wait()
 }

pkg/local_object_storage/blobstor/blobovniczatree/iterate_test.go

@@ -16,6 +16,7 @@ func TestIterateSortedLeavesAndDBPathsAreSame(t *testing.T) {
 		WithBlobovniczaShallowWidth(5),
 		WithRootPath(t.TempDir()),
 	)
+	blz.createDBInAdvance = true
 	require.NoError(t, blz.Open(false))
 	require.NoError(t, blz.Init())
 	defer func() {

pkg/local_object_storage/blobstor/blobovniczatree/option.go

@@ -26,6 +26,7 @@ type cfg struct {
 	waitBeforeDropDB   time.Duration
 	blzInitWorkerCount int
 	blzMoveBatchSize   int
+	createDBInAdvance  bool
 }
 
 type Option func(*cfg)
@@ -139,3 +140,10 @@ func WithInitWorkerCount(v int) Option {
 		c.blzInitWorkerCount = v
 	}
 }
+
+// WithInitInAdvance returns an option to create blobovnicza tree DB's in advance.
+func WithInitInAdvance(v bool) Option {
+	return func(c *cfg) {
+		c.createDBInAdvance = v
+	}
+}