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epugh merged 1 commit into from
May 3, 2026
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Add Solr/Lucene migration correctness blog post #178

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12 changes: 12 additions & 0 deletions content/pages/blogposts/2026-05-02-solr-lucene-migration-correctness.md
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Title: Validating Ranking Correctness During Solr/Lucene Migrations
category: solr/blogposts
summary: A practical article on detecting ranking behavior drift during major Solr/Lucene upgrades using side-by-side validation of candidate overlap, rank deltas, score distribution drift, and latency behavior. Written by Parveen Saini.
slug: solr-lucene-migration-correctness
URL: blogposts/solr-lucene-migration-correctness.html
save_as: blogposts/solr-lucene-migration-correctness.html

# Validating Ranking Correctness During Solr/Lucene Migrations

Major Solr/Lucene upgrades can introduce subtle ranking behavior changes even when functional tests continue to pass. This article discusses a practical side-by-side validation approach for detecting candidate-set changes, rank deltas, score distribution drift, and latency differences during migration testing.

The complete post can be read here: [Validating Ranking Correctness During Solr/Lucene Migrations](https://dzone.com/articles/solr5-to-solr8-migration-ads-system).
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@dsmiley dsmiley May 20, 2026

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I'm surprised this doesn't link to the comparison tool as well, which also has the detailed checklist.

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@parveensaini parveensaini May 24, 2026

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Thanks David. I opened a small follow-up PR to add the companion harness/checklist link as suggested.
#185