Since late August, Acquia has been gradually upgrading from Solr 8 to Solr 9, a process that will culminate with the migration of production environments in the second half of September. This upgrade brings significant improvements and changes that require the attention of development teams.
Choosing the self-service path gives you more control over the timing of the upgrade and the ability to verify your custom configuration before the date scheduled by Acquia. This proactive approach ensures a smooth transition and guarantees that your website's search functions stably in production.
This article details the process for performing a self-service Solr 9 upgrade in Acquia environments, focusing on key configuration aspects in Drupal and the management of custom configsets.
What does the change to Solr 9.8 entail?
Solr 9 represents a significant evolution, built on Lucene 9, bringing improvements in index management, query efficiency, and a more modern and secure foundation. Among the most notable innovations is native capability for vector search (KNN and embeddings), opening the door to semantic and AI-driven search functionalities.
Key aspects to consider for configuration primarily revolve around changes in format and module management.…