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Posted to issues@solr.apache.org by "Matthew Biscocho (Jira)" <ji...@apache.org> on 2025/05/07 21:38:00 UTC

[jira] [Created] (SOLR-17756) Parallelize calculation of index fingerprint across segments

Matthew Biscocho created SOLR-17756:
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             Summary: Parallelize calculation of index fingerprint across segments
                 Key: SOLR-17756
                 URL: https://issues.apache.org/jira/browse/SOLR-17756
             Project: Solr
          Issue Type: Improvement
    Affects Versions: 9.8.1, 8.11.4, main (10.0)
            Reporter: Matthew Biscocho


The index fingerprint is currently being calculated on each segment sequentially. While this works fine, the index fingerprint calculation was noticed to be a very slow process and on leader election is blocking.

This proposes to have this calculation parallelized across segments instead. Since the fingerprint is just a cumulative sum of a hash on versions, the order in which it is added to the running sum should not matter.



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