: <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?
-Hoss
