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https://issues.apache.org/jira/browse/SOLR-920?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12833858#action_12833858
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Noble Paul commented on SOLR-920:
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bq., then all the older versions hang around in the cache forever, right?
nope. The cache key is the FQN of the file . in replication , the same file is
overwritten. So the cache entry is overwritten
> 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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