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https://issues.apache.org/jira/browse/SOLR-17756?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matthew Biscocho resolved SOLR-17756.
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Resolution: Fixed
> 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: main (10.0), 8.11.4, 9.8.1
> Reporter: Matthew Biscocho
> Assignee: Matthew Biscocho
> Priority: Major
> Labels: pull-request-available
> Fix For: main (10.0), 9.9
>
> Time Spent: 2h
> Remaining Estimate: 0h
>
> 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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