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DSpace Administrator Guide DSpace 8.x → 10.x Migration Guide Fresh installation + database, assetstore, Solr, metadata, DOI, and frontend migration DSpace 8.x → 10.x PostgreSQL 16 Solr Angular UI Ubuntu ⚠ Migration warning: This guide uses a fresh DSpace 10.x installation + data migration , not an in-place upgrade. Before executing commands on a production server, confirm your paths, database names, service users, backup integrity, and custom configuration. What this guide covers Back up the DSpace 8.x database, assetstore, configuration, and Solr data. Create and prepare the DSpace 10.x PostgreSQL database. Restore the database and migrate the schema. Restore the assetstore with correct ownership and permissions. Handle Solr cores safely without copying old cores into configsets/ . Reindex Discovery and import OAI data. Review DOI metadata and metadata registries. Merge configuration changes and address Angular UI breaking changes. Restart services and perform f...