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Posted to dev@lucene.apache.org by "Hoss Man (JIRA)" <ji...@apache.org> on 2013/05/09 03:04:13 UTC
[jira] [Commented] (SOLR-4779) Deprecate shareSchema in favor of
sharing named config sets
[ https://issues.apache.org/jira/browse/SOLR-4779?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13652611#comment-13652611 ]
Hoss Man commented on SOLR-4779:
--------------------------------
it's important to remember what exactly shareSchema="true" means under the hood.
functiaonlly the effect was that you got the exact same IndexSchema object for all cores whose schema.xml path was the same -- it helps reduce the memory overhead and speeds up the loading of cores in situations where you have a lot of cores using identical schemas.
re-using config sets in SolrCloud may be a viable replacement for sharing schemas such that the config option is no longer needed -- but the question should still remain whether that will still support the optimization of having a single IndexSchema object for each core that re-uses the same config set.
(And of course: the question of what happens with mutable schemas when shared is something that should be considered ... i have no idea what happens today)
> Deprecate shareSchema in favor of sharing named config sets
> -----------------------------------------------------------
>
> Key: SOLR-4779
> URL: https://issues.apache.org/jira/browse/SOLR-4779
> Project: Solr
> Issue Type: Improvement
> Affects Versions: 5.0, 4.4
> Reporter: Erick Erickson
> Assignee: Erick Erickson
>
> While working on SOLR-4478 it occurred to me that sharing schemas should be superseded by sharing named config sets. I pinged the dev list and there's enough interest in this that a JIRA is in order to continue the discussion.
> This _may_ just happen as part of SOLR-4478.
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