On 10/6/21 6:54 AM, Dave wrote:
Personally I always do a full reindex when going to a new version, just safer and you should always be able to do such at any point. However if you got the time to spare you can do an optimize and it will force the segments all into the current version
I'm pretty sure that even if you optimize down to 1 segment, that it will still retain the earliest Lucene version that touched any of the original segments.
An index that has EVER been touched by a 6.x version will only work up to 7.x -- 8.x will refuse to open it. This is how it's designed.
Thanks, Shawn
