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changes.mady.by.user Tim Donohue

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Comment: added a note about metadata 4 all in DSpace 5. Ideally the contents of that external page should be moved into this page.

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The database schema used by DSpace is initialized and upgraded automatically using Flyway DB. The DatabaseUtils class manages all Flyway API calls, and executes the SQL migrations under the org.dspace.storage.rdbms.sqlmigration package and the Java migrations under the org.dspace.storage.rdbms.migration package.  While Flyway is automatically initialized and executed during the initialization of DatabaseManager, various Database Utilities are also available on the command line.

New in DSpace 5.x: Metadata for all DSpace objects

There were several changes between the DSpace 4 and 5 database schema, related to the new "Metadata for all Dspace objects" improvements. Full detail can be found here:

Metadata for all DSpace objects 

Maintenance and Backup

When using PostgreSQL, it's a good idea to perform regular 'vacuuming' of the database to optimize performance. By default, PostgreSQL performs automatic vacuuming on your behalf.  However, if you have this feature disabled, then we recommend scheduling the vacuumdb command to run on a regular basis.

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