Hi, I inherited a solr installation from a previous sysadmin, and we'd like to see if we can move it from the current server to a new one. I don't have much knowledge of solr, but I know my way around Linux. Apologies in advance for any dumb questions, and please feel free to educate me.
Old install is Solr 8.5 running on Ubuntu 18. We're thinking that while we are switching servers, we might as well try to upgrade to Ubuntu 22 and Solr 9.3 (with corresponding JVM increase to 11). First question, is that a crazy idea? Or should we be moving to the same version of Solr on the new server, and then upgrade in place. We'd prefer to do it with minimal downtime, so setting up parallel servers and migrating the data across seems like the least disruptive. So I have tried the parallel server approach. No issues installing Solr and JVM. From reading around the web, starting with https://solr.apache.org/guide/solr/latest/deployment-guide/backup-restore.html And several other pages, which all seem to repeat the advice, the backup restore process is simple. This is a standalone install so I should use http://localhost:8983/solr/collname/replication?command=backup&location=/snapshots to backup, which works fine: the backup appears in /snapshots/ as snapshot.2023xxx. All good. I take the backup, and copy it to the new server, and put it in the same location, /snapshots/2023xxx Then apparenly I only need to run http://localhost:8983/solr/collname/replication?command=restore&name=snapshot.2023xxx&location=/snapshots But this doesn't work. I've tried a lot of different variations, combining snapshot name and location, with or without the collection name, but all I get is the zen like error Searching for Solr? You must type the correct path. Solr will respond. So that's where I'm at. I'm wondering if I've missed a step that's obvious to Solr veterans, but which is missing from the backup/restore page. Do I need to create the core first, for example. Or create the core and copy config files over to the new server.
