Hi Shawn, Thanks for the help.
I hate to burst your bubble here ... but 4 million docs is pretty small for > a Solr index. I have one index that's a hundred times larger, and there > are people with *billions* of documents in SolrCloud. > Sorry I missed a "0" there. It's actually 40 Millions, still according to you, it's still a small sized index. 😊😊 You would need to keep the schema the same for the upgrade, except that you > would need to disable docValues on some of your fields to get rid of the > error you encountered. You won't be able to take advantage of some of the > new capability in the new version unless you re-engineer your config/schema > and reindex. > Thanks.. Got your point. > > Upgrading an index, especially through three major versions, is generally > not recommended. I always reindex when upgrading Solr, especially to a new > major version, because Solr evolves quickly. > What method do you actually follow to re-index upon Solr major upgrade..? I think I should do re-index since I am upgrading 3 major versions at once. What is best method to re-index..? At present, I am planning to re-index by SELECT from previous version (4.10.2) and then UPDATE into latest version(7.1.0). Any other better thoughts to re-index..? Thanks in advance, Leo Prince.
