FIX (restores): Restore via stream instead of downloading backup to local storage

backend/internal/features/backups/backups/usecases/postgresql/create_backup_uc.go

@@ -335,11 +335,6 @@ func (uc *CreatePostgresqlBackupUsecase) buildPgDumpArgs(pg *pgtypes.PostgresqlD
 		"--verbose",
 	}
 
-	// Add parallel jobs based on CPU count
-	if pg.CpuCount > 1 {
-		args = append(args, "-j", strconv.Itoa(pg.CpuCount))
-	}
-
 	for _, schema := range pg.IncludeSchemas {
 		args = append(args, "-n", schema)
 	}

backend/internal/features/databases/databases/postgresql/readonly_user_test.go

@@ -202,8 +202,10 @@ func Test_ReadOnlyUser_MultipleSchemas_AllAccessible(t *testing.T) {
 	defer container.DB.Close()
 
 	_, err := container.DB.Exec(`
-		CREATE SCHEMA IF NOT EXISTS schema_a;
-		CREATE SCHEMA IF NOT EXISTS schema_b;
+		DROP SCHEMA IF EXISTS schema_a CASCADE;
+		DROP SCHEMA IF EXISTS schema_b CASCADE;
+		CREATE SCHEMA schema_a;
+		CREATE SCHEMA schema_b;
 		CREATE TABLE schema_a.table_a (id INT, data TEXT);
 		CREATE TABLE schema_b.table_b (id INT, data TEXT);
 		INSERT INTO schema_a.table_a VALUES (1, 'data_a');

backend/internal/features/restores/controller_test.go

@@ -19,6 +19,7 @@ import (
 	"databasus-backend/internal/features/backups/backups"
 	backups_config "databasus-backend/internal/features/backups/config"
 	"databasus-backend/internal/features/databases"
+	"databasus-backend/internal/features/databases/databases/mysql"
 	"databasus-backend/internal/features/databases/databases/postgresql"
 	"databasus-backend/internal/features/restores/models"
 	"databasus-backend/internal/features/storages"
@@ -35,18 +36,6 @@ import (
 	"databasus-backend/internal/util/tools"
 )
 
-func createTestRouter() *gin.Engine {
-	router := workspaces_testing.CreateTestRouter(
-		workspaces_controllers.GetWorkspaceController(),
-		workspaces_controllers.GetMembershipController(),
-		databases.GetDatabaseController(),
-		backups_config.GetBackupConfigController(),
-		backups.GetBackupController(),
-		GetRestoreController(),
-	)
-	return router
-}
-
 func Test_GetRestores_WhenUserIsWorkspaceMember_RestoresReturned(t *testing.T) {
 	router := createTestRouter()
 	owner := users_testing.CreateTestUser(users_enums.UserRoleMember)
@@ -250,42 +239,122 @@ func Test_RestoreBackup_AuditLogWritten(t *testing.T) {
 	assert.True(t, found, "Audit log for restore not found")
 }
 
-func Test_RestoreBackup_InsufficientDiskSpace_ReturnsError(t *testing.T) {
-	router := createTestRouter()
-	owner := users_testing.CreateTestUser(users_enums.UserRoleMember)
-	workspace := workspaces_testing.CreateTestWorkspace("Test Workspace", owner, router)
-
-	_, backup := createTestDatabaseWithBackupForRestore(workspace, owner, router)
-
-	// Update backup size to 10 TB via repository
-	repo := &backups.BackupRepository{}
-	backup.BackupSizeMb = 10485760.0 // 10 TB in MB
-	err := repo.Save(backup)
-	assert.NoError(t, err)
-
-	request := RestoreBackupRequest{
-		PostgresqlDatabase: &postgresql.PostgresqlDatabase{
-			Version:  tools.PostgresqlVersion16,
-			Host:     "localhost",
-			Port:     5432,
-			Username: "postgres",
-			Password: "postgres",
+func Test_RestoreBackup_DiskSpaceValidation(t *testing.T) {
+	tests := []struct {
+		name                string
+		dbType              databases.DatabaseType
+		cpuCount            int
+		expectDiskValidated bool
+	}{
+		{
+			name:                "PostgreSQL_CPU4_SpaceValidated",
+			dbType:              databases.DatabaseTypePostgres,
+			cpuCount:            4,
+			expectDiskValidated: true,
+		},
+		{
+			name:                "PostgreSQL_CPU1_SpaceNotValidated",
+			dbType:              databases.DatabaseTypePostgres,
+			cpuCount:            1,
+			expectDiskValidated: false,
+		},
+		{
+			name:                "MySQL_SpaceNotValidated",
+			dbType:              databases.DatabaseTypeMysql,
+			cpuCount:            3,
+			expectDiskValidated: false,
 		},
 	}
 
-	testResp := test_utils.MakePostRequest(
-		t,
-		router,
-		fmt.Sprintf("/api/v1/restores/%s/restore", backup.ID.String()),
-		"Bearer "+owner.Token,
-		request,
-		http.StatusBadRequest,
-	)
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			router := createTestRouter()
+			owner := users_testing.CreateTestUser(users_enums.UserRoleMember)
+			workspace := workspaces_testing.CreateTestWorkspace("Test Workspace", owner, router)
 
-	bodyStr := string(testResp.Body)
-	assert.Contains(t, bodyStr, "is required")
-	assert.Contains(t, bodyStr, "is available")
-	assert.Contains(t, bodyStr, "disk space")
+			var backup *backups.Backup
+			var request RestoreBackupRequest
+
+			if tc.dbType == databases.DatabaseTypePostgres {
+				_, backup = createTestDatabaseWithBackupForRestore(workspace, owner, router)
+				request = RestoreBackupRequest{
+					PostgresqlDatabase: &postgresql.PostgresqlDatabase{
+						Version:  tools.PostgresqlVersion16,
+						Host:     "localhost",
+						Port:     5432,
+						Username: "postgres",
+						Password: "postgres",
+						CpuCount: tc.cpuCount,
+					},
+				}
+			} else {
+				mysqlDB := createTestMySQLDatabase("Test MySQL DB", workspace.ID, owner.Token, router)
+				storage := createTestStorage(workspace.ID)
+
+				configService := backups_config.GetBackupConfigService()
+				config, err := configService.GetBackupConfigByDbId(mysqlDB.ID)
+				assert.NoError(t, err)
+
+				config.IsBackupsEnabled = true
+				config.StorageID = &storage.ID
+				config.Storage = storage
+				_, err = configService.SaveBackupConfig(config)
+				assert.NoError(t, err)
+
+				backup = createTestBackup(mysqlDB, owner)
+				request = RestoreBackupRequest{
+					MysqlDatabase: &mysql.MysqlDatabase{
+						Version:  tools.MysqlVersion80,
+						Host:     "localhost",
+						Port:     3306,
+						Username: "root",
+						Password: "password",
+					},
+				}
+			}
+
+			// Set huge backup size (10 TB) that would fail disk validation if checked
+			repo := &backups.BackupRepository{}
+			backup.BackupSizeMb = 10485760.0
+			err := repo.Save(backup)
+			assert.NoError(t, err)
+
+			expectedStatus := http.StatusOK
+			if tc.expectDiskValidated {
+				expectedStatus = http.StatusBadRequest
+			}
+
+			testResp := test_utils.MakePostRequest(
+				t,
+				router,
+				fmt.Sprintf("/api/v1/restores/%s/restore", backup.ID.String()),
+				"Bearer "+owner.Token,
+				request,
+				expectedStatus,
+			)
+
+			bodyStr := string(testResp.Body)
+			if tc.expectDiskValidated {
+				assert.Contains(t, bodyStr, "is required")
+				assert.Contains(t, bodyStr, "is available")
+				assert.Contains(t, bodyStr, "disk space")
+			} else {
+				assert.Contains(t, bodyStr, "restore started successfully")
+			}
+		})
+	}
+}
+
+func createTestRouter() *gin.Engine {
+	router := workspaces_testing.CreateTestRouter(
+		workspaces_controllers.GetWorkspaceController(),
+		workspaces_controllers.GetMembershipController(),
+		databases.GetDatabaseController(),
+		backups_config.GetBackupConfigController(),
+		backups.GetBackupController(),
+		GetRestoreController(),
+	)
+	return router
 }
 
 func createTestDatabaseWithBackupForRestore(
@@ -359,6 +428,53 @@ func createTestDatabase(
 	return &database
 }
 
+func createTestMySQLDatabase(
+	name string,
+	workspaceID uuid.UUID,
+	token string,
+	router *gin.Engine,
+) *databases.Database {
+	testDbName := "test_db"
+	request := databases.Database{
+		WorkspaceID: &workspaceID,
+		Name:        name,
+		Type:        databases.DatabaseTypeMysql,
+		Mysql: &mysql.MysqlDatabase{
+			Version:  tools.MysqlVersion80,
+			Host:     "localhost",
+			Port:     3306,
+			Username: "root",
+			Password: "password",
+			Database: &testDbName,
+		},
+	}
+
+	w := workspaces_testing.MakeAPIRequest(
+		router,
+		"POST",
+		"/api/v1/databases/create",
+		"Bearer "+token,
+		request,
+	)
+
+	if w.Code != http.StatusCreated {
+		panic(
+			fmt.Sprintf(
+				"Failed to create MySQL database. Status: %d, Body: %s",
+				w.Code,
+				w.Body.String(),
+			),
+		)
+	}
+
+	var database databases.Database
+	if err := json.Unmarshal(w.Body.Bytes(), &database); err != nil {
+		panic(err)
+	}
+
+	return &database
+}
+
 func createTestStorage(workspaceID uuid.UUID) *storages.Storage {
 	storage := &storages.Storage{
 		WorkspaceID:  workspaceID,

backend/internal/features/restores/service.go

@@ -129,7 +129,7 @@ func (s *RestoreService) RestoreBackupWithAuth(
 	}
 
 	// Validate disk space before starting restore
-	if err := s.validateDiskSpace(backup); err != nil {
+	if err := s.validateDiskSpace(backup, requestDTO); err != nil {
 		return err
 	}
 
@@ -369,7 +369,24 @@ func (s *RestoreService) validateVersionCompatibility(
 	return nil
 }
 
-func (s *RestoreService) validateDiskSpace(backup *backups.Backup) error {
+func (s *RestoreService) validateDiskSpace(
+	backup *backups.Backup,
+	requestDTO RestoreBackupRequest,
+) error {
+	// Only validate disk space for PostgreSQL when file-based restore is needed:
+	// - CPU > 1 (parallel jobs require file)
+	// - IsExcludeExtensions (TOC filtering requires file)
+	// Other databases and PostgreSQL with CPU=1 without extension exclusion stream directly
+	if requestDTO.PostgresqlDatabase == nil {
+		return nil
+	}
+
+	needsFileBased := requestDTO.PostgresqlDatabase.CpuCount > 1 ||
+		requestDTO.PostgresqlDatabase.IsExcludeExtensions
+	if !needsFileBased {
+		return nil
+	}
+
 	diskUsage, err := s.diskService.GetDiskUsage()
 	if err != nil {
 		return fmt.Errorf("failed to check disk space: %w", err)

backend/internal/features/restores/usecases/mariadb/restore_backup_uc.go

@@ -27,7 +27,6 @@ import (
 	"databasus-backend/internal/features/restores/models"
 	"databasus-backend/internal/features/storages"
 	util_encryption "databasus-backend/internal/util/encryption"
-	files_utils "databasus-backend/internal/util/files"
 	"databasus-backend/internal/util/tools"
 )
 
@@ -134,11 +133,16 @@ func (uc *RestoreMariadbBackupUsecase) restoreFromStorage(
 	}
 	defer func() { _ = os.RemoveAll(filepath.Dir(myCnfFile)) }()
 
-	tempBackupFile, cleanupFunc, err := uc.downloadBackupToTempFile(ctx, backup, storage)
+	// Stream backup directly from storage
+	rawReader, err := storage.GetFile(fieldEncryptor, backup.ID)
 	if err != nil {
-		return fmt.Errorf("failed to download backup: %w", err)
+		return fmt.Errorf("failed to get backup file from storage: %w", err)
 	}
-	defer cleanupFunc()
+	defer func() {
+		if err := rawReader.Close(); err != nil {
+			uc.logger.Error("Failed to close backup reader", "error", err)
+		}
+	}()
 
 	return uc.executeMariadbRestore(
 		ctx,
@@ -146,7 +150,7 @@ func (uc *RestoreMariadbBackupUsecase) restoreFromStorage(
 		mariadbBin,
 		args,
 		myCnfFile,
-		tempBackupFile,
+		rawReader,
 		backup,
 	)
 }
@@ -157,7 +161,7 @@ func (uc *RestoreMariadbBackupUsecase) executeMariadbRestore(
 	mariadbBin string,
 	args []string,
 	myCnfFile string,
-	backupFile string,
+	backupReader io.ReadCloser,
 	backup *backups.Backup,
 ) error {
 	fullArgs := append([]string{"--defaults-file=" + myCnfFile}, args...)
@@ -165,16 +169,10 @@ func (uc *RestoreMariadbBackupUsecase) executeMariadbRestore(
 	cmd := exec.CommandContext(ctx, mariadbBin, fullArgs...)
 	uc.logger.Info("Executing MariaDB restore command", "command", cmd.String())
 
-	backupFileHandle, err := os.Open(backupFile)
-	if err != nil {
-		return fmt.Errorf("failed to open backup file: %w", err)
-	}
-	defer func() { _ = backupFileHandle.Close() }()
-
-	var inputReader io.Reader = backupFileHandle
+	var inputReader io.Reader = backupReader
 
 	if backup.Encryption == backups_config.BackupEncryptionEncrypted {
-		decryptReader, err := uc.setupDecryption(backupFileHandle, backup)
+		decryptReader, err := uc.setupDecryption(backupReader, backup)
 		if err != nil {
 			return fmt.Errorf("failed to setup decryption: %w", err)
 		}
@@ -225,69 +223,6 @@ func (uc *RestoreMariadbBackupUsecase) executeMariadbRestore(
 	return nil
 }
 
-func (uc *RestoreMariadbBackupUsecase) downloadBackupToTempFile(
-	ctx context.Context,
-	backup *backups.Backup,
-	storage *storages.Storage,
-) (string, func(), error) {
-	err := files_utils.EnsureDirectories([]string{
-		config.GetEnv().TempFolder,
-	})
-	if err != nil {
-		return "", nil, fmt.Errorf("failed to ensure directories: %w", err)
-	}
-
-	tempDir, err := os.MkdirTemp(config.GetEnv().TempFolder, "restore_"+uuid.New().String())
-	if err != nil {
-		return "", nil, fmt.Errorf("failed to create temporary directory: %w", err)
-	}
-
-	cleanupFunc := func() {
-		_ = os.RemoveAll(tempDir)
-	}
-
-	tempBackupFile := filepath.Join(tempDir, "backup.sql.zst")
-
-	uc.logger.Info(
-		"Downloading backup file from storage to temporary file",
-		"backupId", backup.ID,
-		"tempFile", tempBackupFile,
-		"encrypted", backup.Encryption == backups_config.BackupEncryptionEncrypted,
-	)
-
-	fieldEncryptor := util_encryption.GetFieldEncryptor()
-	rawReader, err := storage.GetFile(fieldEncryptor, backup.ID)
-	if err != nil {
-		cleanupFunc()
-		return "", nil, fmt.Errorf("failed to get backup file from storage: %w", err)
-	}
-	defer func() {
-		if err := rawReader.Close(); err != nil {
-			uc.logger.Error("Failed to close backup reader", "error", err)
-		}
-	}()
-
-	tempFile, err := os.Create(tempBackupFile)
-	if err != nil {
-		cleanupFunc()
-		return "", nil, fmt.Errorf("failed to create temporary backup file: %w", err)
-	}
-	defer func() {
-		if err := tempFile.Close(); err != nil {
-			uc.logger.Error("Failed to close temporary file", "error", err)
-		}
-	}()
-
-	_, err = uc.copyWithShutdownCheck(ctx, tempFile, rawReader)
-	if err != nil {
-		cleanupFunc()
-		return "", nil, fmt.Errorf("failed to write backup to temporary file: %w", err)
-	}
-
-	uc.logger.Info("Backup file written to temporary location", "tempFile", tempBackupFile)
-	return tempBackupFile, cleanupFunc, nil
-}
-
 func (uc *RestoreMariadbBackupUsecase) setupDecryption(
 	reader io.Reader,
 	backup *backups.Backup,
@@ -358,57 +293,6 @@ port=%d
 	return myCnfFile, nil
 }
 
-func (uc *RestoreMariadbBackupUsecase) copyWithShutdownCheck(
-	ctx context.Context,
-	dst io.Writer,
-	src io.Reader,
-) (int64, error) {
-	buf := make([]byte, 16*1024*1024)
-	var totalBytesWritten int64
-
-	for {
-		select {
-		case <-ctx.Done():
-			return totalBytesWritten, fmt.Errorf("copy cancelled: %w", ctx.Err())
-		default:
-		}
-
-		if config.IsShouldShutdown() {
-			return totalBytesWritten, fmt.Errorf("copy cancelled due to shutdown")
-		}
-
-		bytesRead, readErr := src.Read(buf)
-		if bytesRead > 0 {
-			bytesWritten, writeErr := dst.Write(buf[0:bytesRead])
-			if bytesWritten < 0 || bytesRead < bytesWritten {
-				bytesWritten = 0
-				if writeErr == nil {
-					writeErr = fmt.Errorf("invalid write result")
-				}
-			}
-
-			if writeErr != nil {
-				return totalBytesWritten, writeErr
-			}
-
-			if bytesRead != bytesWritten {
-				return totalBytesWritten, io.ErrShortWrite
-			}
-
-			totalBytesWritten += int64(bytesWritten)
-		}
-
-		if readErr != nil {
-			if readErr != io.EOF {
-				return totalBytesWritten, readErr
-			}
-			break
-		}
-	}
-
-	return totalBytesWritten, nil
-}
-
 func (uc *RestoreMariadbBackupUsecase) handleMariadbRestoreError(
 	database *databases.Database,
 	waitErr error,

backend/internal/features/restores/usecases/mongodb/restore_backup_uc.go

@@ -13,8 +13,6 @@ import (
 	"strings"
 	"time"
 
-	"github.com/google/uuid"
-
 	"databasus-backend/internal/config"
 	"databasus-backend/internal/features/backups/backups"
 	"databasus-backend/internal/features/backups/backups/encryption"
@@ -25,7 +23,6 @@ import (
 	"databasus-backend/internal/features/restores/models"
 	"databasus-backend/internal/features/storages"
 	util_encryption "databasus-backend/internal/util/encryption"
-	files_utils "databasus-backend/internal/util/files"
 	"databasus-backend/internal/util/tools"
 )
 
@@ -149,20 +146,26 @@ func (uc *RestoreMongodbBackupUsecase) restoreFromStorage(
 		}
 	}()
 
-	tempBackupFile, cleanupFunc, err := uc.downloadBackupToTempFile(ctx, backup, storage)
+	// Stream backup directly from storage
+	fieldEncryptor := util_encryption.GetFieldEncryptor()
+	rawReader, err := storage.GetFile(fieldEncryptor, backup.ID)
 	if err != nil {
-		return fmt.Errorf("failed to download backup: %w", err)
+		return fmt.Errorf("failed to get backup file from storage: %w", err)
 	}
-	defer cleanupFunc()
+	defer func() {
+		if err := rawReader.Close(); err != nil {
+			uc.logger.Error("Failed to close backup reader", "error", err)
+		}
+	}()
 
-	return uc.executeMongoRestore(ctx, mongorestoreBin, args, tempBackupFile, backup)
+	return uc.executeMongoRestore(ctx, mongorestoreBin, args, rawReader, backup)
 }
 
 func (uc *RestoreMongodbBackupUsecase) executeMongoRestore(
 	ctx context.Context,
 	mongorestoreBin string,
 	args []string,
-	backupFile string,
+	backupReader io.ReadCloser,
 	backup *backups.Backup,
 ) error {
 	cmd := exec.CommandContext(ctx, mongorestoreBin, args...)
@@ -183,16 +186,10 @@ func (uc *RestoreMongodbBackupUsecase) executeMongoRestore(
 		safeArgs,
 	)
 
-	backupFileHandle, err := os.Open(backupFile)
-	if err != nil {
-		return fmt.Errorf("failed to open backup file: %w", err)
-	}
-	defer func() { _ = backupFileHandle.Close() }()
-
-	var inputReader io.Reader = backupFileHandle
+	var inputReader io.Reader = backupReader
 
 	if backup.Encryption == backups_config.BackupEncryptionEncrypted {
-		decryptReader, err := uc.setupDecryption(backupFileHandle, backup)
+		decryptReader, err := uc.setupDecryption(backupReader, backup)
 		if err != nil {
 			return fmt.Errorf("failed to setup decryption: %w", err)
 		}
@@ -232,69 +229,6 @@ func (uc *RestoreMongodbBackupUsecase) executeMongoRestore(
 	return nil
 }
 
-func (uc *RestoreMongodbBackupUsecase) downloadBackupToTempFile(
-	ctx context.Context,
-	backup *backups.Backup,
-	storage *storages.Storage,
-) (string, func(), error) {
-	err := files_utils.EnsureDirectories([]string{
-		config.GetEnv().TempFolder,
-	})
-	if err != nil {
-		return "", nil, fmt.Errorf("failed to ensure directories: %w", err)
-	}
-
-	tempDir, err := os.MkdirTemp(config.GetEnv().TempFolder, "restore_"+uuid.New().String())
-	if err != nil {
-		return "", nil, fmt.Errorf("failed to create temporary directory: %w", err)
-	}
-
-	cleanupFunc := func() {
-		_ = os.RemoveAll(tempDir)
-	}
-
-	tempBackupFile := filepath.Join(tempDir, "backup.archive.gz")
-
-	uc.logger.Info(
-		"Downloading backup file from storage to temporary file",
-		"backupId", backup.ID,
-		"tempFile", tempBackupFile,
-		"encrypted", backup.Encryption == backups_config.BackupEncryptionEncrypted,
-	)
-
-	fieldEncryptor := util_encryption.GetFieldEncryptor()
-	rawReader, err := storage.GetFile(fieldEncryptor, backup.ID)
-	if err != nil {
-		cleanupFunc()
-		return "", nil, fmt.Errorf("failed to get backup file from storage: %w", err)
-	}
-	defer func() {
-		if err := rawReader.Close(); err != nil {
-			uc.logger.Error("Failed to close backup reader", "error", err)
-		}
-	}()
-
-	tempFile, err := os.Create(tempBackupFile)
-	if err != nil {
-		cleanupFunc()
-		return "", nil, fmt.Errorf("failed to create temporary backup file: %w", err)
-	}
-	defer func() {
-		if err := tempFile.Close(); err != nil {
-			uc.logger.Error("Failed to close temporary file", "error", err)
-		}
-	}()
-
-	_, err = uc.copyWithShutdownCheck(ctx, tempFile, rawReader)
-	if err != nil {
-		cleanupFunc()
-		return "", nil, fmt.Errorf("failed to write backup to temporary file: %w", err)
-	}
-
-	uc.logger.Info("Backup file written to temporary location", "tempFile", tempBackupFile)
-	return tempBackupFile, cleanupFunc, nil
-}
-
 func (uc *RestoreMongodbBackupUsecase) setupDecryption(
 	reader io.Reader,
 	backup *backups.Backup,
@@ -332,57 +266,6 @@ func (uc *RestoreMongodbBackupUsecase) setupDecryption(
 	return decryptReader, nil
 }
 
-func (uc *RestoreMongodbBackupUsecase) copyWithShutdownCheck(
-	ctx context.Context,
-	dst io.Writer,
-	src io.Reader,
-) (int64, error) {
-	buf := make([]byte, 16*1024*1024)
-	var totalBytesWritten int64
-
-	for {
-		select {
-		case <-ctx.Done():
-			return totalBytesWritten, fmt.Errorf("copy cancelled: %w", ctx.Err())
-		default:
-		}
-
-		if config.IsShouldShutdown() {
-			return totalBytesWritten, fmt.Errorf("copy cancelled due to shutdown")
-		}
-
-		bytesRead, readErr := src.Read(buf)
-		if bytesRead > 0 {
-			bytesWritten, writeErr := dst.Write(buf[0:bytesRead])
-			if bytesWritten < 0 || bytesRead < bytesWritten {
-				bytesWritten = 0
-				if writeErr == nil {
-					writeErr = fmt.Errorf("invalid write result")
-				}
-			}
-
-			if writeErr != nil {
-				return totalBytesWritten, writeErr
-			}
-
-			if bytesRead != bytesWritten {
-				return totalBytesWritten, io.ErrShortWrite
-			}
-
-			totalBytesWritten += int64(bytesWritten)
-		}
-
-		if readErr != nil {
-			if readErr != io.EOF {
-				return totalBytesWritten, readErr
-			}
-			break
-		}
-	}
-
-	return totalBytesWritten, nil
-}
-
 func (uc *RestoreMongodbBackupUsecase) handleMongoRestoreError(
 	waitErr error,
 	stderrOutput []byte,

backend/internal/features/restores/usecases/mysql/restore_backup_uc.go

@@ -27,7 +27,6 @@ import (
 	"databasus-backend/internal/features/restores/models"
 	"databasus-backend/internal/features/storages"
 	util_encryption "databasus-backend/internal/util/encryption"
-	files_utils "databasus-backend/internal/util/files"
 	"databasus-backend/internal/util/tools"
 )
 
@@ -134,13 +133,18 @@ func (uc *RestoreMysqlBackupUsecase) restoreFromStorage(
 	}
 	defer func() { _ = os.RemoveAll(filepath.Dir(myCnfFile)) }()
 
-	tempBackupFile, cleanupFunc, err := uc.downloadBackupToTempFile(ctx, backup, storage)
+	// Stream backup directly from storage
+	rawReader, err := storage.GetFile(fieldEncryptor, backup.ID)
 	if err != nil {
-		return fmt.Errorf("failed to download backup: %w", err)
+		return fmt.Errorf("failed to get backup file from storage: %w", err)
 	}
-	defer cleanupFunc()
+	defer func() {
+		if err := rawReader.Close(); err != nil {
+			uc.logger.Error("Failed to close backup reader", "error", err)
+		}
+	}()
 
-	return uc.executeMysqlRestore(ctx, database, mysqlBin, args, myCnfFile, tempBackupFile, backup)
+	return uc.executeMysqlRestore(ctx, database, mysqlBin, args, myCnfFile, rawReader, backup)
 }
 
 func (uc *RestoreMysqlBackupUsecase) executeMysqlRestore(
@@ -149,7 +153,7 @@ func (uc *RestoreMysqlBackupUsecase) executeMysqlRestore(
 	mysqlBin string,
 	args []string,
 	myCnfFile string,
-	backupFile string,
+	backupReader io.ReadCloser,
 	backup *backups.Backup,
 ) error {
 	fullArgs := append([]string{"--defaults-file=" + myCnfFile}, args...)
@@ -157,16 +161,10 @@ func (uc *RestoreMysqlBackupUsecase) executeMysqlRestore(
 	cmd := exec.CommandContext(ctx, mysqlBin, fullArgs...)
 	uc.logger.Info("Executing MySQL restore command", "command", cmd.String())
 
-	backupFileHandle, err := os.Open(backupFile)
-	if err != nil {
-		return fmt.Errorf("failed to open backup file: %w", err)
-	}
-	defer func() { _ = backupFileHandle.Close() }()
-
-	var inputReader io.Reader = backupFileHandle
+	var inputReader io.Reader = backupReader
 
 	if backup.Encryption == backups_config.BackupEncryptionEncrypted {
-		decryptReader, err := uc.setupDecryption(backupFileHandle, backup)
+		decryptReader, err := uc.setupDecryption(backupReader, backup)
 		if err != nil {
 			return fmt.Errorf("failed to setup decryption: %w", err)
 		}
@@ -217,69 +215,6 @@ func (uc *RestoreMysqlBackupUsecase) executeMysqlRestore(
 	return nil
 }
 
-func (uc *RestoreMysqlBackupUsecase) downloadBackupToTempFile(
-	ctx context.Context,
-	backup *backups.Backup,
-	storage *storages.Storage,
-) (string, func(), error) {
-	err := files_utils.EnsureDirectories([]string{
-		config.GetEnv().TempFolder,
-	})
-	if err != nil {
-		return "", nil, fmt.Errorf("failed to ensure directories: %w", err)
-	}
-
-	tempDir, err := os.MkdirTemp(config.GetEnv().TempFolder, "restore_"+uuid.New().String())
-	if err != nil {
-		return "", nil, fmt.Errorf("failed to create temporary directory: %w", err)
-	}
-
-	cleanupFunc := func() {
-		_ = os.RemoveAll(tempDir)
-	}
-
-	tempBackupFile := filepath.Join(tempDir, "backup.sql.zst")
-
-	uc.logger.Info(
-		"Downloading backup file from storage to temporary file",
-		"backupId", backup.ID,
-		"tempFile", tempBackupFile,
-		"encrypted", backup.Encryption == backups_config.BackupEncryptionEncrypted,
-	)
-
-	fieldEncryptor := util_encryption.GetFieldEncryptor()
-	rawReader, err := storage.GetFile(fieldEncryptor, backup.ID)
-	if err != nil {
-		cleanupFunc()
-		return "", nil, fmt.Errorf("failed to get backup file from storage: %w", err)
-	}
-	defer func() {
-		if err := rawReader.Close(); err != nil {
-			uc.logger.Error("Failed to close backup reader", "error", err)
-		}
-	}()
-
-	tempFile, err := os.Create(tempBackupFile)
-	if err != nil {
-		cleanupFunc()
-		return "", nil, fmt.Errorf("failed to create temporary backup file: %w", err)
-	}
-	defer func() {
-		if err := tempFile.Close(); err != nil {
-			uc.logger.Error("Failed to close temporary file", "error", err)
-		}
-	}()
-
-	_, err = uc.copyWithShutdownCheck(ctx, tempFile, rawReader)
-	if err != nil {
-		cleanupFunc()
-		return "", nil, fmt.Errorf("failed to write backup to temporary file: %w", err)
-	}
-
-	uc.logger.Info("Backup file written to temporary location", "tempFile", tempBackupFile)
-	return tempBackupFile, cleanupFunc, nil
-}
-
 func (uc *RestoreMysqlBackupUsecase) setupDecryption(
 	reader io.Reader,
 	backup *backups.Backup,
@@ -348,57 +283,6 @@ port=%d
 	return myCnfFile, nil
 }
 
-func (uc *RestoreMysqlBackupUsecase) copyWithShutdownCheck(
-	ctx context.Context,
-	dst io.Writer,
-	src io.Reader,
-) (int64, error) {
-	buf := make([]byte, 16*1024*1024)
-	var totalBytesWritten int64
-
-	for {
-		select {
-		case <-ctx.Done():
-			return totalBytesWritten, fmt.Errorf("copy cancelled: %w", ctx.Err())
-		default:
-		}
-
-		if config.IsShouldShutdown() {
-			return totalBytesWritten, fmt.Errorf("copy cancelled due to shutdown")
-		}
-
-		bytesRead, readErr := src.Read(buf)
-		if bytesRead > 0 {
-			bytesWritten, writeErr := dst.Write(buf[0:bytesRead])
-			if bytesWritten < 0 || bytesRead < bytesWritten {
-				bytesWritten = 0
-				if writeErr == nil {
-					writeErr = fmt.Errorf("invalid write result")
-				}
-			}
-
-			if writeErr != nil {
-				return totalBytesWritten, writeErr
-			}
-
-			if bytesRead != bytesWritten {
-				return totalBytesWritten, io.ErrShortWrite
-			}
-
-			totalBytesWritten += int64(bytesWritten)
-		}
-
-		if readErr != nil {
-			if readErr != io.EOF {
-				return totalBytesWritten, readErr
-			}
-			break
-		}
-	}
-
-	return totalBytesWritten, nil
-}
-
 func (uc *RestoreMysqlBackupUsecase) handleMysqlRestoreError(
 	database *databases.Database,
 	waitErr error,

backend/internal/features/restores/usecases/postgresql/restore_backup_uc.go

@@ -82,7 +82,7 @@ func (uc *RestorePostgresqlBackupUsecase) Execute(
 	)
 }
 
-// restoreCustomType restores a backup in custom type (-Fc) - legacy type
+// restoreCustomType restores a backup in custom type (-Fc)
 func (uc *RestorePostgresqlBackupUsecase) restoreCustomType(
 	originalDB *databases.Database,
 	pgBin string,
@@ -91,7 +91,248 @@ func (uc *RestorePostgresqlBackupUsecase) restoreCustomType(
 	pg *pgtypes.PostgresqlDatabase,
 	isExcludeExtensions bool,
 ) error {
-	uc.logger.Info("Restoring backup in custom type (-Fc)", "backupId", backup.ID)
+	uc.logger.Info(
+		"Restoring backup in custom type (-Fc)",
+		"backupId",
+		backup.ID,
+		"cpuCount",
+		pg.CpuCount,
+	)
+
+	// If excluding extensions, we must use file-based restore (requires TOC file generation)
+	// Also use file-based restore for parallel jobs (multiple CPUs)
+	if isExcludeExtensions || pg.CpuCount > 1 {
+		return uc.restoreViaFile(originalDB, pgBin, backup, storage, pg, isExcludeExtensions)
+	}
+
+	// Single CPU without extension exclusion: stream directly via stdin
+	return uc.restoreViaStdin(originalDB, pgBin, backup, storage, pg)
+}
+
+// restoreViaStdin streams backup via stdin for single CPU restore
+func (uc *RestorePostgresqlBackupUsecase) restoreViaStdin(
+	originalDB *databases.Database,
+	pgBin string,
+	backup *backups.Backup,
+	storage *storages.Storage,
+	pg *pgtypes.PostgresqlDatabase,
+) error {
+	uc.logger.Info("Restoring via stdin streaming (CPU=1)", "backupId", backup.ID)
+
+	args := []string{
+		"-Fc", // expect custom type
+		"--no-password",
+		"-h", pg.Host,
+		"-p", strconv.Itoa(pg.Port),
+		"-U", pg.Username,
+		"-d", *pg.Database,
+		"--verbose",
+		"--clean",
+		"--if-exists",
+		"--no-owner",
+		"--no-acl",
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), 60*time.Minute)
+	defer cancel()
+
+	// Monitor for shutdown and cancel context if needed
+	go func() {
+		ticker := time.NewTicker(1 * time.Second)
+		defer ticker.Stop()
+
+		for {
+			select {
+			case <-ctx.Done():
+				return
+			case <-ticker.C:
+				if config.IsShouldShutdown() {
+					cancel()
+					return
+				}
+			}
+		}
+	}()
+
+	// Create temporary .pgpass file for authentication
+	fieldEncryptor := util_encryption.GetFieldEncryptor()
+	decryptedPassword, err := fieldEncryptor.Decrypt(originalDB.ID, pg.Password)
+	if err != nil {
+		return fmt.Errorf("failed to decrypt password: %w", err)
+	}
+
+	pgpassFile, err := uc.createTempPgpassFile(pg, decryptedPassword)
+	if err != nil {
+		return fmt.Errorf("failed to create temporary .pgpass file: %w", err)
+	}
+	defer func() {
+		if pgpassFile != "" {
+			_ = os.RemoveAll(filepath.Dir(pgpassFile))
+		}
+	}()
+
+	// Verify .pgpass file was created successfully
+	if pgpassFile == "" {
+		return fmt.Errorf("temporary .pgpass file was not created")
+	}
+
+	if info, err := os.Stat(pgpassFile); err == nil {
+		uc.logger.Info("Temporary .pgpass file created successfully",
+			"pgpassFile", pgpassFile,
+			"size", info.Size(),
+			"mode", info.Mode(),
+		)
+	} else {
+		return fmt.Errorf("failed to verify .pgpass file: %w", err)
+	}
+
+	// Get backup stream from storage
+	rawReader, err := storage.GetFile(fieldEncryptor, backup.ID)
+	if err != nil {
+		return fmt.Errorf("failed to get backup file from storage: %w", err)
+	}
+	defer func() {
+		if err := rawReader.Close(); err != nil {
+			uc.logger.Error("Failed to close backup reader", "error", err)
+		}
+	}()
+
+	var backupReader io.Reader = rawReader
+	if backup.Encryption == backups_config.BackupEncryptionEncrypted {
+		// Validate encryption metadata
+		if backup.EncryptionSalt == nil || backup.EncryptionIV == nil {
+			return fmt.Errorf("backup is encrypted but missing encryption metadata")
+		}
+
+		// Get master key
+		masterKey, err := uc.secretKeyService.GetSecretKey()
+		if err != nil {
+			return fmt.Errorf("failed to get master key for decryption: %w", err)
+		}
+
+		// Decode salt and IV from base64
+		salt, err := base64.StdEncoding.DecodeString(*backup.EncryptionSalt)
+		if err != nil {
+			return fmt.Errorf("failed to decode encryption salt: %w", err)
+		}
+
+		iv, err := base64.StdEncoding.DecodeString(*backup.EncryptionIV)
+		if err != nil {
+			return fmt.Errorf("failed to decode encryption IV: %w", err)
+		}
+
+		// Create decryption reader
+		decryptReader, err := encryption.NewDecryptionReader(
+			rawReader,
+			masterKey,
+			backup.ID,
+			salt,
+			iv,
+		)
+		if err != nil {
+			return fmt.Errorf("failed to create decryption reader: %w", err)
+		}
+
+		backupReader = decryptReader
+		uc.logger.Info("Using decryption for encrypted backup", "backupId", backup.ID)
+	}
+
+	cmd := exec.CommandContext(ctx, pgBin, args...)
+	uc.logger.Info("Executing PostgreSQL restore command via stdin", "command", cmd.String())
+
+	// Setup environment variables
+	uc.setupPgRestoreEnvironment(cmd, pgpassFile, pg)
+
+	// Verify executable exists and is accessible
+	if _, err := exec.LookPath(pgBin); err != nil {
+		return fmt.Errorf(
+			"PostgreSQL executable not found or not accessible: %s - %w",
+			pgBin,
+			err,
+		)
+	}
+
+	// Create stdin pipe for explicit data pumping
+	stdinPipe, err := cmd.StdinPipe()
+	if err != nil {
+		return fmt.Errorf("stdin pipe: %w", err)
+	}
+
+	// Get stderr to capture any error output
+	pgStderr, err := cmd.StderrPipe()
+	if err != nil {
+		return fmt.Errorf("stderr pipe: %w", err)
+	}
+
+	// Capture stderr in a separate goroutine
+	stderrCh := make(chan []byte, 1)
+	go func() {
+		stderrOutput, _ := io.ReadAll(pgStderr)
+		stderrCh <- stderrOutput
+	}()
+
+	// Start pg_restore
+	if err = cmd.Start(); err != nil {
+		return fmt.Errorf("start %s: %w", filepath.Base(pgBin), err)
+	}
+
+	// Copy backup data to stdin in a separate goroutine with proper error handling
+	copyErrCh := make(chan error, 1)
+	go func() {
+		_, copyErr := io.Copy(stdinPipe, backupReader)
+		// Close stdin pipe to signal EOF to pg_restore - critical for proper termination
+		closeErr := stdinPipe.Close()
+		if copyErr != nil {
+			copyErrCh <- fmt.Errorf("copy to stdin: %w", copyErr)
+		} else if closeErr != nil {
+			copyErrCh <- fmt.Errorf("close stdin: %w", closeErr)
+		} else {
+			copyErrCh <- nil
+		}
+	}()
+
+	// Wait for the restore to finish
+	waitErr := cmd.Wait()
+	stderrOutput := <-stderrCh
+	copyErr := <-copyErrCh
+
+	// Check for shutdown before finalizing
+	if config.IsShouldShutdown() {
+		return fmt.Errorf("restore cancelled due to shutdown")
+	}
+
+	// Check for copy errors first - these indicate issues with decryption or data reading
+	if copyErr != nil {
+		return fmt.Errorf("failed to stream backup data to pg_restore: %w", copyErr)
+	}
+
+	if waitErr != nil {
+		if config.IsShouldShutdown() {
+			return fmt.Errorf("restore cancelled due to shutdown")
+		}
+
+		return uc.handlePgRestoreError(originalDB, waitErr, stderrOutput, pgBin, args, pg)
+	}
+
+	return nil
+}
+
+// restoreViaFile downloads backup and uses parallel jobs for multi-CPU restore
+func (uc *RestorePostgresqlBackupUsecase) restoreViaFile(
+	originalDB *databases.Database,
+	pgBin string,
+	backup *backups.Backup,
+	storage *storages.Storage,
+	pg *pgtypes.PostgresqlDatabase,
+	isExcludeExtensions bool,
+) error {
+	uc.logger.Info(
+		"Restoring via file with parallel jobs",
+		"backupId",
+		backup.ID,
+		"cpuCount",
+		pg.CpuCount,
+	)
 
 	// Use parallel jobs based on CPU count
 	// Cap between 1 and 8 to avoid overwhelming the server

backend/internal/features/tests/postgresql_backup_restore_test.go

@@ -68,23 +68,31 @@ type TestDataItem struct {
 func Test_BackupAndRestorePostgresql_RestoreIsSuccesful(t *testing.T) {
 	env := config.GetEnv()
 	cases := []struct {
-		name    string
-		version string
-		port    string
+		name     string
+		version  string
+		port     string
+		cpuCount int
 	}{
-		{"PostgreSQL 12", "12", env.TestPostgres12Port},
-		{"PostgreSQL 13", "13", env.TestPostgres13Port},
-		{"PostgreSQL 14", "14", env.TestPostgres14Port},
-		{"PostgreSQL 15", "15", env.TestPostgres15Port},
-		{"PostgreSQL 16", "16", env.TestPostgres16Port},
-		{"PostgreSQL 17", "17", env.TestPostgres17Port},
-		{"PostgreSQL 18", "18", env.TestPostgres18Port},
+		{"PostgreSQL 12 (CPU=1 streamed)", "12", env.TestPostgres12Port, 1},
+		{"PostgreSQL 12 (CPU=4 directory)", "12", env.TestPostgres12Port, 4},
+		{"PostgreSQL 13 (CPU=1 streamed)", "13", env.TestPostgres13Port, 1},
+		{"PostgreSQL 13 (CPU=4 directory)", "13", env.TestPostgres13Port, 4},
+		{"PostgreSQL 14 (CPU=1 streamed)", "14", env.TestPostgres14Port, 1},
+		{"PostgreSQL 14 (CPU=4 directory)", "14", env.TestPostgres14Port, 4},
+		{"PostgreSQL 15 (CPU=1 streamed)", "15", env.TestPostgres15Port, 1},
+		{"PostgreSQL 15 (CPU=4 directory)", "15", env.TestPostgres15Port, 4},
+		{"PostgreSQL 16 (CPU=1 streamed)", "16", env.TestPostgres16Port, 1},
+		{"PostgreSQL 16 (CPU=4 directory)", "16", env.TestPostgres16Port, 4},
+		{"PostgreSQL 17 (CPU=1 streamed)", "17", env.TestPostgres17Port, 1},
+		{"PostgreSQL 17 (CPU=4 directory)", "17", env.TestPostgres17Port, 4},
+		{"PostgreSQL 18 (CPU=1 streamed)", "18", env.TestPostgres18Port, 1},
+		{"PostgreSQL 18 (CPU=4 directory)", "18", env.TestPostgres18Port, 4},
 	}
 
 	for _, tc := range cases {
 		t.Run(tc.name, func(t *testing.T) {
 			t.Parallel()
-			testBackupRestoreForVersion(t, tc.version, tc.port)
+			testBackupRestoreForVersion(t, tc.version, tc.port, tc.cpuCount)
 		})
 	}
 }
@@ -361,7 +369,7 @@ func Test_BackupAndRestorePostgresql_WithReadOnlyUser_RestoreIsSuccessful(t *tes
 	}
 }
 
-func testBackupRestoreForVersion(t *testing.T, pgVersion string, port string) {
+func testBackupRestoreForVersion(t *testing.T, pgVersion string, port string, cpuCount int) {
 	container, err := connectToPostgresContainer(pgVersion, port)
 	assert.NoError(t, err)
 	defer func() {
@@ -379,10 +387,11 @@ func testBackupRestoreForVersion(t *testing.T, pgVersion string, port string) {
 
 	storage := storages.CreateTestStorage(workspace.ID)
 
-	database := createDatabaseViaAPI(
+	database := createDatabaseWithCpuCountViaAPI(
 		t, router, "Test Database", workspace.ID,
 		container.Host, container.Port,
 		container.Username, container.Password, container.Database,
+		cpuCount,
 		user.Token,
 	)
 
@@ -396,7 +405,7 @@ func testBackupRestoreForVersion(t *testing.T, pgVersion string, port string) {
 	backup := waitForBackupCompletion(t, router, database.ID, user.Token, 5*time.Minute)
 	assert.Equal(t, backups.BackupStatusCompleted, backup.Status)
 
-	newDBName := "restoreddb"
+	newDBName := fmt.Sprintf("restoreddb_%s_cpu%d", pgVersion, cpuCount)
 	_, err = container.DB.Exec(fmt.Sprintf("DROP DATABASE IF EXISTS %s;", newDBName))
 	assert.NoError(t, err)
 
@@ -409,10 +418,11 @@ func testBackupRestoreForVersion(t *testing.T, pgVersion string, port string) {
 	assert.NoError(t, err)
 	defer newDB.Close()
 
-	createRestoreViaAPI(
+	createRestoreWithCpuCountViaAPI(
 		t, router, backup.ID,
 		container.Host, container.Port,
 		container.Username, container.Password, newDBName,
+		cpuCount,
 		user.Token,
 	)
 
@@ -1258,6 +1268,27 @@ func createDatabaseViaAPI(
 	password string,
 	database string,
 	token string,
+) *databases.Database {
+	return createDatabaseWithCpuCountViaAPI(
+		t, router, name, workspaceID,
+		host, port, username, password, database,
+		1,
+		token,
+	)
+}
+
+func createDatabaseWithCpuCountViaAPI(
+	t *testing.T,
+	router *gin.Engine,
+	name string,
+	workspaceID uuid.UUID,
+	host string,
+	port int,
+	username string,
+	password string,
+	database string,
+	cpuCount int,
+	token string,
 ) *databases.Database {
 	request := databases.Database{
 		Name:        name,
@@ -1269,7 +1300,7 @@ func createDatabaseViaAPI(
 			Username: username,
 			Password: password,
 			Database: &database,
-			CpuCount: 1,
+			CpuCount: cpuCount,
 		},
 	}
 
@@ -1354,7 +1385,7 @@ func createRestoreViaAPI(
 	database string,
 	token string,
 ) {
-	createRestoreWithOptionsViaAPI(
+	createRestoreWithCpuCountViaAPI(
 		t,
 		router,
 		backupID,
@@ -1363,11 +1394,44 @@ func createRestoreViaAPI(
 		username,
 		password,
 		database,
-		false,
+		1,
 		token,
 	)
 }
 
+func createRestoreWithCpuCountViaAPI(
+	t *testing.T,
+	router *gin.Engine,
+	backupID uuid.UUID,
+	host string,
+	port int,
+	username string,
+	password string,
+	database string,
+	cpuCount int,
+	token string,
+) {
+	request := restores.RestoreBackupRequest{
+		PostgresqlDatabase: &pgtypes.PostgresqlDatabase{
+			Host:     host,
+			Port:     port,
+			Username: username,
+			Password: password,
+			Database: &database,
+			CpuCount: cpuCount,
+		},
+	}
+
+	test_utils.MakePostRequest(
+		t,
+		router,
+		fmt.Sprintf("/api/v1/restores/%s/restore", backupID.String()),
+		"Bearer "+token,
+		request,
+		http.StatusOK,
+	)
+}
+
 func createRestoreWithOptionsViaAPI(
 	t *testing.T,
 	router *gin.Engine,

backend/internal/util/tools/postgresql.go

@@ -176,6 +176,13 @@ func getPostgresqlBasePath(
 	postgresesInstallDir string,
 ) string {
 	if envMode == env_utils.EnvModeDevelopment {
+		// On Windows, PostgreSQL 12 and 13 have issues with piping over restore
+		if runtime.GOOS == "windows" {
+			if version == PostgresqlVersion12 || version == PostgresqlVersion13 {
+				version = PostgresqlVersion14
+			}
+		}
+
 		return filepath.Join(
 			postgresesInstallDir,
 			fmt.Sprintf("postgresql-%s", string(version)),

frontend/src/features/databases/ui/CreateDatabaseComponent.tsx

@@ -50,13 +50,13 @@ const initializeDatabaseTypeData = (db: Database): Database => {
 
   switch (db.type) {
     case DatabaseType.POSTGRES:
-      return { ...base, postgresql: db.postgresql ?? ({ cpuCount: 4 } as PostgresqlDatabase) };
+      return { ...base, postgresql: db.postgresql ?? ({ cpuCount: 1 } as PostgresqlDatabase) };
     case DatabaseType.MYSQL:
       return { ...base, mysql: db.mysql ?? ({} as MysqlDatabase) };
     case DatabaseType.MARIADB:
       return { ...base, mariadb: db.mariadb ?? ({} as MariadbDatabase) };
     case DatabaseType.MONGODB:
-      return { ...base, mongodb: db.mongodb ?? ({ cpuCount: 4 } as MongodbDatabase) };
+      return { ...base, mongodb: db.mongodb ?? ({ cpuCount: 1 } as MongodbDatabase) };
     default:
       return db;
   }

frontend/src/features/databases/ui/edit/EditMongoDbSpecificDataComponent.tsx

@@ -78,7 +78,7 @@ export const EditMongoDbSpecificDataComponent = ({
           database: result.database,
           authDatabase: result.authDatabase,
           isHttps: result.useTls,
-          cpuCount: 4,
+          cpuCount: 1,
         },
       };
 

frontend/src/features/databases/ui/edit/EditPostgreSqlSpecificDataComponent.tsx

@@ -82,7 +82,7 @@ export const EditPostgreSqlSpecificDataComponent = ({
           password: result.password,
           database: result.database,
           isHttps: result.isHttps,
-          cpuCount: 4,
+          cpuCount: 1,
         },
       };
 
@@ -356,34 +356,36 @@ export const EditPostgreSqlSpecificDataComponent = ({
         />
       </div>
 
-      <div className="mb-5 flex w-full items-center">
-        <div className="min-w-[150px]">CPU count</div>
-        <div className="flex items-center">
-          <InputNumber
-            min={1}
-            max={128}
-            value={editingDatabase.postgresql?.cpuCount}
-            onChange={(value) => {
-              if (!editingDatabase.postgresql) return;
+      {isRestoreMode && (
+        <div className="mb-5 flex w-full items-center">
+          <div className="min-w-[150px]">CPU count</div>
+          <div className="flex items-center">
+            <InputNumber
+              min={1}
+              max={128}
+              value={editingDatabase.postgresql?.cpuCount}
+              onChange={(value) => {
+                if (!editingDatabase.postgresql) return;
 
-              setEditingDatabase({
-                ...editingDatabase,
-                postgresql: { ...editingDatabase.postgresql, cpuCount: value || 1 },
-              });
-              setIsConnectionTested(false);
-            }}
-            size="small"
-            className="max-w-[75px] grow"
-          />
+                setEditingDatabase({
+                  ...editingDatabase,
+                  postgresql: { ...editingDatabase.postgresql, cpuCount: value || 1 },
+                });
+                setIsConnectionTested(false);
+              }}
+              size="small"
+              className="max-w-[75px] grow"
+            />
 
-          <Tooltip
-            className="cursor-pointer"
-            title="Number of CPU cores to use for backup and restore operations. Higher values may speed up operations but use more resources."
-          >
-            <InfoCircleOutlined className="ml-2" style={{ color: 'gray' }} />
-          </Tooltip>
+            <Tooltip
+              className="cursor-pointer"
+              title="Number of CPU cores to use for backup and restore operations. Higher values may speed up operations but use more resources."
+            >
+              <InfoCircleOutlined className="ml-2" style={{ color: 'gray' }} />
+            </Tooltip>
+          </div>
         </div>
-      </div>
+      )}
 
       <div className="mt-4 mb-1 flex items-center">
         <div

frontend/src/features/databases/ui/show/ShowPostgreSqlSpecificDataComponent.tsx

@@ -54,11 +54,6 @@ export const ShowPostgreSqlSpecificDataComponent = ({ database }: Props) => {
         <div>{database.postgresql?.isHttps ? 'Yes' : 'No'}</div>
       </div>
 
-      <div className="mb-1 flex w-full items-center">
-        <div className="min-w-[150px]">CPU count</div>
-        <div>{database.postgresql?.cpuCount}</div>
-      </div>
-
       {!!database.postgresql?.includeSchemas?.length && (
         <div className="mb-1 flex w-full items-center">
           <div className="min-w-[150px]">Include schemas</div>