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https://issues.apache.org/jira/browse/SOLR-8586?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15112725#comment-15112725
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Yonik Seeley commented on SOLR-8586:
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A bloom filter would allow one to estimate (with a known error) if a specific
version is contained within the index. But it's not clear how we would use
that info. All we need here is to know if two indexes are in sync or not.
I was thinking of something as simple as
{code}
h = 0
for version in versions:
h += hash(version)
{code}
> 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
> Reporter: Yonik Seeley
>
> 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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