MySQL Blob vs. Filesystem: Which is Best for Storing File Attachments?

Weighing the Options: MySQL Blob Field Type vs. Filesystem Storage

When designing an upcoming project involving database records with multiple file attachments, the choice between the MySQL blob field type and external filesystem storage poses a dilemma.

MySQL Blob Field Type

Consider using the MySQL blob field type when:

• Prioritizing data security and integrity: Blocks the upload of malicious files or PHP scripts.
• Simplifying data management: Maintains a close relationship between data and attachments, making permissions and accessibility easier to manage.

However, note that performance can be impacted by excessively large BLOBs in tables and memory cache.

Filesystem Storage

Opt for filesystem storage when:

• Deployment simplicity is paramount: Consolidates data storage in a single location, eliminating the need for write access by web users.
• Synchronization is necessary: Facilitates data sharing among multiple server instances.

When storing files externally, consider the following:

• File Organization: Establish a naming convention based on primary keys for folders and filenames.
• Serving Strategy: Choose between server aliases for fast serving but additional configuration or manual scripting for better access control and caching.

Ultimately, the best choice depends on specific project requirements, with trade-offs in performance, security, and maintenance.

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