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https://issues.apache.org/jira/browse/SOLR-14040?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17019292#comment-17019292
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Noble Paul commented on SOLR-14040:
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Do we have any study domne on what is the benefit we get by sharing schema?
Schema itself is a lightweight object. The only expensive part in loading
`IndexSchema` is the cost of parsing and loading the xml. if we can use a
better parser that will cease to be a problem
> solr.xml shareSchema does not work in SolrCloud
> -----------------------------------------------
>
> Key: SOLR-14040
> URL: https://issues.apache.org/jira/browse/SOLR-14040
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: Schema and Analysis
> Reporter: David Smiley
> Assignee: David Smiley
> Priority: Major
> Time Spent: 20m
> Remaining Estimate: 0h
>
> solr.xml has a shareSchema boolean option that can be toggled from the
> default of false to true in order to share IndexSchema objects within the
> Solr node. This is silently ignored in SolrCloud mode. The pertinent code
> is {{org.apache.solr.core.ConfigSetService#createConfigSetService}} which
> creates a CloudConfigSetService that is not related to the SchemaCaching
> class. This may not be a big deal in SolrCloud which tends not to deal well
> with many cores per node but I'm working on changing that.
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