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https://issues.apache.org/jira/browse/SOLR-8586?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15137227#comment-15137227
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Yonik Seeley commented on SOLR-8586:
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OK, I did some basic performance testing...
On an index w/ 5M docs, the first-time fingerprint took 1100ms (most of that
time was un-inversion of the version field, which did not use docValues).
After the first time, subsequent fingerprints took ~55ms
> Implement hash over all documents to check for shard synchronization
> --------------------------------------------------------------------
>
> Key: SOLR-8586
> URL: https://issues.apache.org/jira/browse/SOLR-8586
> Project: Solr
> Issue Type: Improvement
> Components: SolrCloud
> Reporter: Yonik Seeley
> Fix For: 5.5, Trunk
>
> Attachments: SOLR-8586.patch, SOLR-8586.patch, SOLR-8586.patch,
> SOLR-8586.patch
>
>
> An order-independent hash across all of the versions in the index should
> suffice. The hash itself is pretty easy, but we need to figure out
> when/where to do this check (for example, I think PeerSync is currently used
> in multiple contexts and this check would perhaps not be appropriate for all
> PeerSync calls?)
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