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https://issues.apache.org/jira/browse/SOLR-920?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12833814#action_12833814
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Drew Morris commented on SOLR-920:
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Just reviewing the syntax of the XML... if you have 2 different schemas that
should be shared with multiple cores... will this still work? So if I had 1000
cores sharing 1 schema and 1000 cores sharing a different schema will that be
possible with this implementation?
> Cache and reuse IndexSchema
> ---------------------------
>
> Key: SOLR-920
> URL: https://issues.apache.org/jira/browse/SOLR-920
> Project: Solr
> Issue Type: Improvement
> Reporter: Noble Paul
> Assignee: Noble Paul
> Attachments: SOLR-920.patch, SOLR-920.patch, SOLR-920.patch
>
>
> if there are 1000's of cores then the cost of loading unloading schema.xml
> can be prohibitive
> similar to SOLR-919 we can also cache the DOM object of schema.xml if the
> location on disk is same. All the dynamic properties can be replaced lazily
> when they are read.
> We can go one step ahead in this case. Th IndexSchema object is immutable .
> So if there are no core properties then the same IndexSchema object can be
> used across all the cores
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