[SOLR-1306] Support pluggable persistence/loading of solr.xml details

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Won't Fix
• Fix Version/s: 4.1
• Component/s: multicore
• Assignee: Erick Erickson
• Reporter: Noble Paul
• Created: 23/Jul/09 05:44
• Updated: 24/Jan/13 06:34
• Resolved: 27/Nov/12 20:48

Description

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

<solr>
  <dataProvider class="com.foo.FooDataProvider" attr1="val1" attr2="val2"/>
</solr>

There will be a new interface (or abstract class ) called SolrDataProvider which this class must implement

Issue Links

• relates to: SOLR-1293 Support for large no:of cores and faster loading/unloading of cores