Thanks,

I think we'll try the full optimize route as we don't have storage to spare for second copies, etc.

-Mike

On 10/6/21 8:54 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

On Oct 6, 2021, at 8:46 AM, Michael Conrad <mich...@newsrx.com> wrote:

Hello all,

Is there an easy way to determine Lucene versions for segments?

If we were to do a full reindex, rewriting all segments, would that update the 
segment version to match the current Lucene version in use?

We are working on upgrading from Solr 7.7.3 to Solr 8.x but have discovered 
that several of our collections have segments that are Lucene 6.

-Mike

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