Exploring best practices for Core Data from the SQLite perspective

Best practices for Core Data with SQLite

Storing BLOBs

• It is recommended to store small BLOBs in the database and large BLOBs as external files.
• Core Data's allowsExternalBinaryDataStorage property can be used to determine how to store binary objects.

Copying the SQLite database

• Copying a SQLite database is not a simple task, as the file is used to handle multiple connections.
• When copying a SQLite database, make sure to include the write-ahead logging (WAL) file.
• The NSSQLiteManualVacuumOption option can be used to reduce the size of a copied database.

Using SQLite approaches to backup

• SQLite's Online Backup API provides a way to copy an SQLite database while it is being actively used.
• The ATTACH DATABASE and CREATE TABLE AS SELECT statements can be used to create a backup of a SQLite database with minimal size.

Optimizing the database size

• Enable write-ahead logging (WAL) mode to improve read/write performance and reduce database file size.
• Use the SQLite VACUUM command to reduce the size of the database file.
• Avoid storing unnecessary data in the database to minimize the database file size.

Improving performance

• Use SQLite's executeStatements: method to improve performance when executing multiple SQL statements.
• Consider using SQLite's copy API to back up or restore a database, as it offers more control and performance improvements.
• Optimize your Core Data model to improve performance, such as using relationships and fetch requests efficiently.

By following these best practices, you can maximize the performance and efficiency of your Core Data SQLite database.