On 1/27/2016 2:00 AM, Zaccheo Bagnati wrote: > I apologize for connecting to this thread but I'm interested in this topic > as well. I think we have a similar configuration: solr 4.8, standard > master/slave replication, data is indexed on master and then replicated to > slave. I'm investigating how to migrate to solr 5.*. > Erick, you say that there is a full backward compatibility between 4.* and > 5.* so, for example, we could migrate the slave (and it will continue to > read old indexes), then migrate the master (and it could could even update > old indexes without need for full reindex). It seems too simple... and I > hope it will be so, but my experience of migrations is not so painless as > you say...(I'm not referring to SOLR) > Is there anyone who tried this approach on a production environment? What I > should be more careful of? Is there any incompatibility in REST calls and > responses?
Upgrading slaves first and then the master is the recommended way to do upgrades in a master/slave installation. Many people have done upgrades in this exact way with success. I personally would completely rebuild the index once I had the masters upgraded, so Solr will perform best. Thanks, Shawn
