Apache Solr is a powerful and widely used search platform, but it’s essential to keep your Solr installation up-to-date to benefit from the latest features and security enhancements. In this guide, we’ll walk you through the process of upgrading your Solr server from version 8.0 to the latest release, 9.3.0.
Step 1: Back Up Your Solr Data
Before embarking on any major software upgrade, it’s crucial to safeguard your data. Start by creating a backup of your Solr data. You can do this using the Solr backup tool or simply by copying the data directory to a secure location. This backup will be your safety net in case anything goes wrong during the upgrade process.
Step 2: Download Solr 9.3.0
Visit the Apache Solr website and download the Solr 9.3.0 release. Ensure that you obtain the correct version compatible with your operating system.
Step 3: Stop the Solr 8.0 Server
Next, stop the currently running Solr 8.0 server. You can do this either by using the Solr stop command or by stopping the Solr service if it’s running as a service on your system.
Step 4: Unzip Solr 9.3.0
Once you’ve downloaded Solr 9.3.0, unzip the release files to a directory on your server. This will prepare the environment for the upgrade.
Step 5: Copy Configuration Files
To ensure that your Solr 9.3.0 server uses the same configuration as your Solr 8.0 server, copy the configuration files from the Solr 9.3.0 release to the Solr 8.0 configuration directory.
Step 6: Copy Data Files
Migrate your data by copying the Solr 9.3.0 data files to the Solr 8.0 data directory. This step is crucial to retain your existing data in the upgraded Solr version.
Step 7: Start Solr 9.3.0 Server
Now it’s time to start the Solr 9.3.0 server. You can do this using the Solr start command or by starting the Solr service on your system.
Step 8: Verify the Upgrade
To ensure that the upgrade was successful, access the Solr admin console for the Solr 9.3.0 server. Verify that everything is functioning as expected and that your data remains intact.
If you are using SolrCloud, remember that you’ll need to upgrade your SolrCloud cluster to version 9.3.0 before upgrading your Solr clients.
If you use SolrJ, make sure to upgrade SolrJ to version 8.10 or higher before upgrading your Solr clients to version 9.3.0.
It’s highly recommended to thoroughly test your Solr application after the upgrade to version 9.3.0. This will help you identify and address any potential issues, ensuring that your search functionality remains reliable and optimized.
By following these steps and tips, you can successfully upgrade your Solr server to the latest version, 9.3.0, and continue to harness the full potential of this robust search platform.