Should I Use hbm2ddl.auto=update in Production?

Caution: Avoid hbm2ddl.auto=update in Production

When using Hibernate, hbm2ddl.auto=update is a tempting option for automatically updating the database schema. However, experts strongly advise against this practice in a production environment.

Reasons to Avoid hbm2ddl.auto=update in Production:

• Unreliability: While Hibernate's developers have made significant improvements, automatic updates remain susceptible to errors, especially in production environments with high data volume and concurrent access.
• Lack of control: By using hbm2ddl.auto=update, you surrender control over schema changes to Hibernate, which can compromise database integrity and data consistency.
• Data loss risk: Automatic updates may inadvertently drop tables or truncate data, leading to potential data loss.
• Performance implications: Automatic updates can introduce performance bottlenecks and slow down database operations.

Safe Alternative:

To safely update the schema in production, follow these steps:

• Write manual SQL patches for schema changes.
• Review the patches meticulously with a database administrator (DBA).
• Test the patches thoroughly in a separate environment.
• Apply the patches manually after proper verification.

Conclusion:

While hbm2ddl.auto=update may be convenient in development environments, it is crucial to exercise caution in production. Avoid using this feature and opt for a more controlled and reliable approach to safeguard your database integrity and prevent data loss.

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