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https://issues.apache.org/jira/browse/SOLR-1306?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13496496#comment-13496496
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Mark Miller commented on SOLR-1306:
-----------------------------------
I'm with yonik on this one - I think we should drop the top level config (eg
solr.xml). Instead, we should auto load folders - no config required, but if
you want to override some things, the config lives with the core folder. If you
want to be able to place core folders in other locations, we could have a sys
prop that added locations. Anything required for settings (like zkHost) would
be passed on startup as sys props instead.
You can still load cores in parallel this way.
> Support pluggable persistence/loading of solr.xml details
> ---------------------------------------------------------
>
> Key: SOLR-1306
> URL: https://issues.apache.org/jira/browse/SOLR-1306
> Project: Solr
> Issue Type: New Feature
> Components: multicore
> Reporter: Noble Paul
> Assignee: Erick Erickson
> Fix For: 4.1
>
> Attachments: SOLR-1306.patch, SOLR-1306.patch, SOLR-1306.patch,
> SOLR-1306.patch
>
>
> Persisting and loading details from one xml is fine if the no:of cores are
> small and the no:of cores are few/fixed . If there are 10's of thousands of
> cores in a single box adding a new core (with persistent=true) becomes very
> expensive because every core creation has to write this huge xml.
> Moreover , there is a good chance that the file gets corrupted and all the
> cores become unusable . In that case I would prefer it to be stored in a
> centralized DB which is backed up/replicated and all the information is
> available in a centralized location.
> We may need to refactor CoreContainer to have a pluggable implementation
> which can load/persist the details . The default implementation should
> write/read from/to solr.xml . And the class should be pluggable as follows in
> solr.xml
> {code:xml}
> <solr>
> <dataProvider class="com.foo.FooDataProvider" attr1="val1" attr2="val2"/>
> </solr>
> {code}
> There will be a new interface (or abstract class ) called SolrDataProvider
> which this class must implement
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