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https://issues.apache.org/jira/browse/SOLR-17756?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17953304#comment-17953304
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ASF subversion and git services commented on SOLR-17756:
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Commit 6a32d346f5175d9bc35d7b7d271f2dfd99074eb7 in solr's branch
refs/heads/branch_9x from Matthew Biscocho
[ https://gitbox.apache.org/repos/asf?p=solr.git;h=6a32d346f51 ]
SOLR-17756: Parallelize calculation of index fingerprint across segments (#3352)
Parallelize index fingerprint computation across segments via a dedicated
thread pool
> 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
> 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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