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From Chris Hostetter <>
Subject Re: Setting up two cores in solr.xml for Solr 4.0
Date Tue, 04 Sep 2012 19:40:48 GMT

:   <core name="MYCORE_test" instanceDir="MYCORE" dataDir="MYCORE_test" />

I'm pretty sure what you hav above tells solr that core MYCORE_test it 
should use the instanceDir MYCORE but ignore the <dataDir/> in that 
solrconfig.xml and use the one you specified.

This on the other hand...
: >   <core name="MYCORE_test" instanceDir="MYCORE">
: >     <property name="dataDir" value="MYCORE_test" />
: >    </core>

...tells solr that the MYCORE_test SolrCore should use the instanceDir 
MYCORE, and when parsing that solrconfig.xml file it should set the 
variable ${dataDir} to be "MYCORE_test" -- but if your solconfig.xml file 
does not ever refer to the  ${dataDir} variable, it would have any effect.

so the question becomes -- what does your solrconfig.xml look like?


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