On 2/22/2018 9:50 AM, Hodder, Rick wrote:
I am migrating from SOLR 4.10.2 to SOLR 7.1.

All seems to be going well, except for one thing: the score that is coming back 
for the resulting documents is giving different scores.

The absolute score has no meaning when you change something -- the index, the query, the software version, etc.  You can't compare absolute scores.

What matters is the relative score of one document to another *in the same query*.  The amount of difference is almost irrelevant -- the goal of Lucene's score calculation gymnastics is to have one document score higher than another, so the *order* is reasonably correct.

Assuming you're using the default relevancy sort, does the order of your search results change dramatically from one version to the other?  If it does, is the order generally better from a relevance standpoint, or generally worse?  If you are specifying an explicit sort, then the scores will likely be ignored.

What I am describing is also why it's strongly recommended that you never try to convert scores to percentages:



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