cmd/frostfs-adm/docs/deploy.md

@@ -34,6 +34,8 @@ alphabet-wallets: /home/user/deploy/alphabet-wallets
 network:
   max_object_size: 67108864
   epoch_duration: 240
+  max_ec_data_count: 12
+  max_ec_parity_count: 4
   fee:
     candidate: 0
     container: 0

cmd/frostfs-adm/internal/commonflags/flags.go

@@ -26,6 +26,8 @@ const (
 	ContractsURLFlagDesc            = "URL to archive with compiled FrostFS contracts"
 	EpochDurationInitFlag           = "network.epoch_duration"
 	MaxObjectSizeInitFlag           = "network.max_object_size"
+	MaxECDataCountFlag              = "network.max_ec_data_count"
+	MaxECParityCounFlag             = "network.max_ec_parity_count"
 	RefillGasAmountFlag             = "gas"
 	StorageWalletFlag               = "storage-wallet"
 	ContainerFeeInitFlag            = "network.fee.container"

cmd/frostfs-adm/internal/modules/config/config.go

@@ -21,6 +21,8 @@ type configTemplate struct {
 	CandidateFee            int
 	ContainerFee            int
 	ContainerAliasFee       int
+	MaxECDataCount          int
+	MaxECParityCount        int
 	WithdrawFee             int
 	Glagolitics             []string
 	HomomorphicHashDisabled bool
@@ -31,6 +33,8 @@ alphabet-wallets: {{ .AlphabetDir}}
 network:
   max_object_size: {{ .MaxObjectSize}}
   epoch_duration: {{ .EpochDuration}}
+  max_ec_data_count: {{ .MaxECDataCount}}
+  max_ec_parity_count: {{ .MaxECParityCount}}
   homomorphic_hash_disabled: {{ .HomomorphicHashDisabled}}
   fee:
     candidate: {{ .CandidateFee}}
@@ -106,6 +110,8 @@ func generateConfigExample(appDir string, credSize int) (string, error) {
 	tmpl := configTemplate{
 		Endpoint:                "https://neo.rpc.node:30333",
 		MaxObjectSize:           67108864,      // 64 MiB
+		MaxECDataCount:          12,            // Tested with 16-node networks, assuming 12 data + 4 parity nodes.
+		MaxECParityCount:        4,             // Maximum 4 parity chunks, typically <= 3 for most policies.
 		EpochDuration:           240,           // 1 hour with 15s per block
 		HomomorphicHashDisabled: false,         // object homomorphic hash is enabled
 		CandidateFee:            100_0000_0000, // 100.0 GAS (Fixed8)

cmd/frostfs-adm/internal/modules/config/config_test.go

@@ -27,6 +27,8 @@ func TestGenerateConfigExample(t *testing.T) {
 	require.Equal(t, "https://neo.rpc.node:30333", v.GetString("rpc-endpoint"))
 	require.Equal(t, filepath.Join(appDir, "alphabet-wallets"), v.GetString("alphabet-wallets"))
 	require.Equal(t, 67108864, v.GetInt("network.max_object_size"))
+	require.Equal(t, 12, v.GetInt("network.max_ec_data_count"))
+	require.Equal(t, 4, v.GetInt("network.max_ec_parity_count"))
 	require.Equal(t, 240, v.GetInt("network.epoch_duration"))
 	require.Equal(t, 10000000000, v.GetInt("network.fee.candidate"))
 	require.Equal(t, 1000, v.GetInt("network.fee.container"))

cmd/frostfs-adm/internal/modules/morph/config/config.go

@@ -60,7 +60,8 @@ func dumpNetworkConfig(cmd *cobra.Command, _ []string) error {
 		switch k {
 		case netmap.ContainerFeeConfig, netmap.ContainerAliasFeeConfig,
 			netmap.EpochDurationConfig, netmap.IrCandidateFeeConfig,
-			netmap.MaxObjectSizeConfig, netmap.WithdrawFeeConfig:
+			netmap.MaxObjectSizeConfig, netmap.WithdrawFeeConfig,
+			netmap.MaxECDataCountConfig, netmap.MaxECParityCountConfig:
 			nbuf := make([]byte, 8)
 			copy(nbuf[:], v)
 			n := binary.LittleEndian.Uint64(nbuf)
@@ -103,14 +104,22 @@ func SetConfigCmd(cmd *cobra.Command, args []string) error {
 	}
 
 	forceFlag, _ := cmd.Flags().GetBool(forceConfigSet)
-
 	bw := io.NewBufBinWriter()
+	prm := make(map[string]any)
 	for _, arg := range args {
 		k, v, err := parseConfigPair(arg, forceFlag)
 		if err != nil {
 			return err
 		}
 
+		prm[k] = v
+	}
+
+	if err := validateConfig(prm, forceFlag); err != nil {
+		return err
+	}
+
+	for k, v := range prm {
 		// In NeoFS this is done via Notary contract. Here, however, we can form the
 		// transaction locally. The first `nil` argument is required only for notary
 		// disabled environment which is not supported by that command.
@@ -128,6 +137,33 @@ func SetConfigCmd(cmd *cobra.Command, args []string) error {
 	return wCtx.AwaitTx()
 }
 
+func validateConfig(args map[string]any, forceFlag bool) error {
+	var sumEC int64
+	_, okData := args[netmap.MaxECDataCountConfig]
+	_, okParity := args[netmap.MaxECParityCountConfig]
+	if okData != okParity {
+		return fmt.Errorf("both %s and %s must be present in the configuration",
+			netmap.MaxECDataCountConfig, netmap.MaxECParityCountConfig)
+	}
+
+	for k, v := range args {
+		value, ok := v.(int64)
+		if !ok || value < 0 {
+			return fmt.Errorf("%s must be >= 0, got %v", k, v)
+		}
+
+		if k == netmap.MaxECDataCountConfig || k == netmap.MaxECParityCountConfig {
+			sumEC += value
+		}
+	}
+
+	if sumEC > 256 && !forceFlag {
+		return fmt.Errorf("the sum of %s and %s must be <= 256, got %d",
+			netmap.MaxECDataCountConfig, netmap.MaxECParityCountConfig, sumEC)
+	}
+	return nil
+}
+
 func parseConfigPair(kvStr string, force bool) (key string, val any, err error) {
 	k, v, found := strings.Cut(kvStr, "=")
 	if !found {
@@ -140,7 +176,8 @@ func parseConfigPair(kvStr string, force bool) (key string, val any, err error)
 	switch key {
 	case netmap.ContainerFeeConfig, netmap.ContainerAliasFeeConfig,
 		netmap.EpochDurationConfig, netmap.IrCandidateFeeConfig,
-		netmap.MaxObjectSizeConfig, netmap.WithdrawFeeConfig:
+		netmap.MaxObjectSizeConfig, netmap.WithdrawFeeConfig,
+		netmap.MaxECDataCountConfig, netmap.MaxECParityCountConfig:
 		val, err = strconv.ParseInt(valRaw, 10, 64)
 		if err != nil {
 			err = fmt.Errorf("could not parse %s's value '%s' as int: %w", key, valRaw, err)

cmd/frostfs-adm/internal/modules/morph/helper/netmap.go

@@ -35,6 +35,8 @@ func GetDefaultNetmapContractConfigMap() map[string]any {
 	m := make(map[string]any)
 	m[netmap.EpochDurationConfig] = viper.GetInt64(commonflags.EpochDurationInitFlag)
 	m[netmap.MaxObjectSizeConfig] = viper.GetInt64(commonflags.MaxObjectSizeInitFlag)
+	m[netmap.MaxECDataCountConfig] = viper.GetInt64(commonflags.MaxECDataCountFlag)
+	m[netmap.MaxECParityCountConfig] = viper.GetInt64(commonflags.MaxECParityCounFlag)
 	m[netmap.ContainerFeeConfig] = viper.GetInt64(commonflags.ContainerFeeInitFlag)
 	m[netmap.ContainerAliasFeeConfig] = viper.GetInt64(commonflags.ContainerAliasFeeInitFlag)
 	m[netmap.IrCandidateFeeConfig] = viper.GetInt64(commonflags.CandidateFeeInitFlag)

cmd/frostfs-adm/internal/modules/morph/initialize/root.go

@@ -25,6 +25,8 @@ var Cmd = &cobra.Command{
 		_ = viper.BindPFlag(commonflags.EndpointFlag, cmd.Flags().Lookup(commonflags.EndpointFlag))
 		_ = viper.BindPFlag(commonflags.EpochDurationInitFlag, cmd.Flags().Lookup(epochDurationCLIFlag))
 		_ = viper.BindPFlag(commonflags.MaxObjectSizeInitFlag, cmd.Flags().Lookup(maxObjectSizeCLIFlag))
+		_ = viper.BindPFlag(commonflags.MaxECDataCountFlag, cmd.Flags().Lookup(commonflags.MaxECDataCountFlag))
+		_ = viper.BindPFlag(commonflags.MaxECParityCounFlag, cmd.Flags().Lookup(commonflags.MaxECParityCounFlag))
 		_ = viper.BindPFlag(commonflags.HomomorphicHashDisabledInitFlag, cmd.Flags().Lookup(homomorphicHashDisabledCLIFlag))
 		_ = viper.BindPFlag(commonflags.CandidateFeeInitFlag, cmd.Flags().Lookup(candidateFeeCLIFlag))
 		_ = viper.BindPFlag(commonflags.ContainerFeeInitFlag, cmd.Flags().Lookup(containerFeeCLIFlag))

cmd/frostfs-cli/modules/netmap/netinfo.go

@@ -43,6 +43,8 @@ var netInfoCmd = &cobra.Command{
 		cmd.Printf(format, "Epoch duration", netInfo.EpochDuration())
 		cmd.Printf(format, "Inner Ring candidate fee", netInfo.IRCandidateFee())
 		cmd.Printf(format, "Maximum object size", netInfo.MaxObjectSize())
+		cmd.Printf(format, "Maximum count of data shards", netInfo.MaxECDataCount())
+		cmd.Printf(format, "Maximum count of parity shards", netInfo.MaxECParityCount())
 		cmd.Printf(format, "Withdrawal fee", netInfo.WithdrawalFee())
 		cmd.Printf(format, "Homomorphic hashing disabled", netInfo.HomomorphicHashingDisabled())
 		cmd.Printf(format, "Maintenance mode allowed", netInfo.MaintenanceModeAllowed())

dev/adm/frostfs-adm.yml

@@ -6,6 +6,8 @@ network:
   basic_income_rate: 100000000
   homomorphic_hash_disabled: false
   maintenance_mode_allowed: true
+  max_ec_data_count: 12
+  max_ec_parity_count: 4
   fee:
     audit: 10000
     candidate: 10000000000

pkg/morph/client/netmap/config.go

@@ -11,6 +11,8 @@ import (
 
 const (
 	MaxObjectSizeConfig           = "MaxObjectSize"
+	MaxECParityCountConfig        = "MaxECParityCount"
+	MaxECDataCountConfig          = "MaxECDataCount"
 	EpochDurationConfig           = "EpochDuration"
 	ContainerFeeConfig            = "ContainerFee"
 	ContainerAliasFeeConfig       = "ContainerAliasFee"