[#1024] shard: Resync metabase concurrently

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

cmd/frostfs-node/config.go

@@ -122,6 +122,7 @@ type shardCfg struct {
 	smallSizeObjectLimit       uint64
 	uncompressableContentType  []string
 	refillMetabase             bool
+	refillMetabaseWorkersCount int
 	mode                       shardmode.Mode
 
 	metaCfg struct {
@@ -234,6 +235,7 @@ func (a *applicationConfiguration) updateShardConfig(c *config.Config, oldConfig
 	var newConfig shardCfg
 
 	newConfig.refillMetabase = oldConfig.RefillMetabase()
+	newConfig.refillMetabaseWorkersCount = oldConfig.RefillMetabaseWorkersCount()
 	newConfig.mode = oldConfig.Mode()
 	newConfig.compress = oldConfig.Compress()
 	newConfig.estimateCompressibility = oldConfig.EstimateCompressibility()
@@ -986,6 +988,7 @@ func (c *cfg) getShardOpts(shCfg shardCfg) shardOptsWithID {
 	sh.shOpts = []shard.Option{
 		shard.WithLogger(c.log),
 		shard.WithRefillMetabase(shCfg.refillMetabase),
+		shard.WithRefillMetabaseWorkersCount(shCfg.refillMetabaseWorkersCount),
 		shard.WithMode(shCfg.mode),
 		shard.WithBlobStorOptions(blobstoreOpts...),
 		shard.WithMetaBaseOptions(mbOptions...),

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

@@ -117,6 +117,7 @@ func TestEngineSection(t *testing.T) {
 
 				require.Equal(t, false, sc.RefillMetabase())
 				require.Equal(t, mode.ReadOnly, sc.Mode())
+				require.Equal(t, 100, sc.RefillMetabaseWorkersCount())
 			case 1:
 				require.Equal(t, "tmp/1/blob/pilorama.db", pl.Path())
 				require.Equal(t, fs.FileMode(0o644), pl.Perm())
@@ -168,6 +169,7 @@ func TestEngineSection(t *testing.T) {
 
 				require.Equal(t, true, sc.RefillMetabase())
 				require.Equal(t, mode.ReadWrite, sc.Mode())
+				require.Equal(t, shardconfig.RefillMetabaseWorkersCountDefault, sc.RefillMetabaseWorkersCount())
 			}
 			return nil
 		})

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

@@ -18,6 +18,7 @@ const (
 	// SmallSizeLimitDefault is a default limit of small objects payload in bytes.
 	SmallSizeLimitDefault                   = 1 << 20
 	EstimateCompressibilityThresholdDefault = 0.1
+	RefillMetabaseWorkersCountDefault       = 500
 )
 
 // From wraps config section into Config.
@@ -134,6 +135,20 @@ func (x *Config) RefillMetabase() bool {
 	)
 }
 
+// RefillMetabaseWorkersCount returns the value of "resync_metabase_worker_count" config parameter.
+//
+// Returns RefillMetabaseWorkersCountDefault if the value is not a positive number.
+func (x *Config) RefillMetabaseWorkersCount() int {
+	v := config.IntSafe(
+		(*config.Config)(x),
+		"resync_metabase_worker_count",
+	)
+	if v > 0 {
+		return int(v)
+	}
+	return RefillMetabaseWorkersCountDefault
+}
+
 // Mode return the value of "mode" config parameter.
 //
 // Panics if read the value is not one of predefined

config/example/node.env

@@ -98,6 +98,7 @@ FROSTFS_STORAGE_REBUILD_WORKERS_COUNT=1000
 ## 0 shard
 ### Flag to refill Metabase from BlobStor
 FROSTFS_STORAGE_SHARD_0_RESYNC_METABASE=false
+FROSTFS_STORAGE_SHARD_0_RESYNC_METABASE_WORKER_COUNT=100
 ### Flag to set shard mode
 FROSTFS_STORAGE_SHARD_0_MODE=read-only
 ### Write cache config

config/example/node.json

@@ -144,6 +144,7 @@
       "0": {
         "mode": "read-only",
         "resync_metabase": false,
+        "resync_metabase_worker_count": 100,
         "writecache": {
           "enabled": false,
           "no_sync": true,

config/example/node.yaml

@@ -167,6 +167,7 @@ storage:
         # degraded-read-only
         # disabled (do not work with the shard, allows to not remove it from the config)
       resync_metabase: false  # sync metabase with blobstor on start, expensive, leave false until complete understanding
+      resync_metabase_worker_count: 100
 
       writecache:
         enabled: false

docs/storage-node-configuration.md

@@ -180,13 +180,14 @@ Contains configuration for each shard. Keys must be consecutive numbers starting
 The following table describes configuration for each shard.
 
 | Parameter                                        | Type                                        | Default value | Description                                                                                                                                                                                                       |
-|-------------------------------------|---------------------------------------------|---------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| ------------------------------------------------ | ------------------------------------------- | ------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
 | `compress`                                       | `bool`                                      | `false`       | Flag to enable compression.                                                                                                                                                                                       |
 | `compression_exclude_content_types`              | `[]string`                                  |               | List of content-types to disable compression for. Content-type is taken from `Content-Type` object attribute. Each element can contain a star `*` as a first (last) character, which matches any prefix (suffix). |
 | `compression_estimate_compressibility`           | `bool`                                      | `false`       | If `true`, then noramalized compressibility estimation is used to decide compress data or not.                                                                                                                    |
 | `compression_estimate_compressibility_threshold` | `float`                                     | `0.1`         | Normilized compressibility estimate threshold: data will compress if estimation if greater than this value.                                                                                                       |
 | `mode`                                           | `string`                                    | `read-write`  | Shard Mode.<br/>Possible values:  `read-write`, `read-only`, `degraded`, `degraded-read-only`, `disabled`                                                                                                         |
 | `resync_metabase`                                | `bool`                                      | `false`       | Flag to enable metabase resync on start.                                                                                                                                                                          |
+| `resync_metabase_worker_count`                   | `int`                                       | `1000`        | Count of concurrent workers to resync metabase.                                                                                                                                                                   |
 | `writecache`                                     | [Writecache config](#writecache-subsection) |               | Write-cache configuration.                                                                                                                                                                                        |
 | `metabase`                                       | [Metabase config](#metabase-subsection)     |               | Metabase configuration.                                                                                                                                                                                           |
 | `blobstor`                                       | [Blobstor config](#blobstor-subsection)     |               | Blobstor configuration.                                                                                                                                                                                           |

pkg/local_object_storage/shard/control.go

@@ -15,6 +15,7 @@ import (
 	objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
 	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
 	"go.uber.org/zap"
+	"golang.org/x/sync/errgroup"
 )
 
 func (s *Shard) handleMetabaseFailure(stage string, err error) error {
@@ -185,9 +186,14 @@ func (s *Shard) refillMetabase(ctx context.Context) error {
 		return fmt.Errorf("could not reset metabase: %w", err)
 	}
 
-	obj := objectSDK.New()
+	eg, egCtx := errgroup.WithContext(ctx)
+	if s.cfg.refillMetabaseWorkersCount > 0 {
+		eg.SetLimit(s.cfg.refillMetabaseWorkersCount)
+	}
 
-	err = blobstor.IterateBinaryObjects(ctx, s.blobStor, func(addr oid.Address, data []byte, descriptor []byte) error {
+	itErr := blobstor.IterateBinaryObjects(egCtx, s.blobStor, func(addr oid.Address, data []byte, descriptor []byte) error {
+		eg.Go(func() error {
+			obj := objectSDK.New()
 			if err := obj.Unmarshal(data); err != nil {
 				s.log.Warn(logs.ShardCouldNotUnmarshalObject,
 					zap.Stringer("address", addr),
@@ -198,9 +204,9 @@ func (s *Shard) refillMetabase(ctx context.Context) error {
 			var err error
 			switch obj.Type() {
 			case objectSDK.TypeTombstone:
-			err = s.refillTombstoneObject(ctx, obj)
+				err = s.refillTombstoneObject(egCtx, obj)
 			case objectSDK.TypeLock:
-			err = s.refillLockObject(ctx, obj)
+				err = s.refillLockObject(egCtx, obj)
 			default:
 			}
 			if err != nil {
@@ -211,13 +217,25 @@ func (s *Shard) refillMetabase(ctx context.Context) error {
 			mPrm.SetObject(obj)
 			mPrm.SetStorageID(descriptor)
 
-		_, err = s.metaBase.Put(ctx, mPrm)
+			_, err = s.metaBase.Put(egCtx, mPrm)
 			if err != nil && !client.IsErrObjectAlreadyRemoved(err) && !errors.Is(err, meta.ErrObjectIsExpired) {
 				return err
 			}
 
 			return nil
 		})
+
+		select {
+		case <-egCtx.Done():
+			return egCtx.Err()
+		default:
+			return nil
+		}
+	})
+
+	egErr := eg.Wait()
+
+	err = errors.Join(egErr, itErr)
 	if err != nil {
 		return fmt.Errorf("could not put objects to the meta: %w", err)
 	}

pkg/local_object_storage/shard/refill_test.go

@@ -5,6 +5,7 @@ import (
 	"os"
 	"testing"
 
+	shardconfig "git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-node/config/engine/shard"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/internal/testutil"
 	oidtest "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id/test"
 	"github.com/stretchr/testify/require"
@@ -29,7 +30,10 @@ func BenchmarkRefillMetabase(b *testing.B) {
 }
 
 func benchRefillMetabase(b *testing.B, objectsCount int) {
-	sh := newShard(b, false)
+	sh := newCustomShard(b, false, shardOptions{
+		additionalShardOptions: []Option{WithRefillMetabaseWorkersCount(shardconfig.RefillMetabaseWorkersCountDefault)},
+	})
+
 	defer func() { require.NoError(b, sh.Close()) }()
 
 	var putPrm PutPrm

pkg/local_object_storage/shard/shard.go

@@ -96,6 +96,7 @@ type cfg struct {
 	m sync.RWMutex
 
 	refillMetabase             bool
+	refillMetabaseWorkersCount int
 
 	rmBatchSize int
 
@@ -300,6 +301,13 @@ func WithRefillMetabase(v bool) Option {
 	}
 }
 
+// WithRefillMetabaseWorkersCount returns option to set count of workers to refill the Metabase on Shard's initialization step.
+func WithRefillMetabaseWorkersCount(v int) Option {
+	return func(c *cfg) {
+		c.refillMetabaseWorkersCount = v
+	}
+}
+
 // WithMode returns option to set shard's mode. Mode must be one of the predefined:
 //   - mode.ReadWrite;
 //   - mode.ReadOnly.