If the configuration directory for a Solr core contains a file named solrcore.properties that file can contain any arbitrary user defined property names and values using the Java standard , and those properties can be used as variables in the XML configuration files for that Solr core.

比如可以在其中定义

#solrcore.properties in master

enable.master=true

enable.slave=false

and in slave

#solrcore.properties in slave 

enable.master=false 

enable.slave=true