I highly recommend doing a full re-index from scratch to the new cluster. Then, test it in your dev/test environment. And finally, switch your search app to the new server.
Jan > 25. sep. 2023 kl. 09:40 skrev Jim Morgan <jim.mor...@nknews.org.INVALID>: > > 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.
