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https://issues.apache.org/jira/browse/SOLR-9273?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15363859#comment-15363859
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Noble Paul commented on SOLR-9273:
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I think it is less efficient than caching by configsetname+ZK_version . It is 
cheaper to read the version from schema than reading the content from schema & 
compute the hash (for stale check)

> Share and reuse config set in a node
> ------------------------------------
>
>                 Key: SOLR-9273
>                 URL: https://issues.apache.org/jira/browse/SOLR-9273
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: config-api, Schema and Analysis, SolrCloud
>            Reporter: Shalin Shekhar Mangar
>             Fix For: 6.2, master (7.0)
>
>
> Currently, each core in a node ends up creating a completely new instance of 
> ConfigSet with its own schema, solrconfig and other properties. This is 
> wasteful when you have a lot of replicas in the same node with many of them 
> referring to the same config set in Zookeeper.
> There are many issues that need to be addressed for this to work so this is a 
> parent issue to track the work.



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