: For the "_version_" field in the schema.xml, do we need to set it be : docValues="true"?
you *can* add docValues, but it is not required. There is an open discussion about wether we should add docValues to the _version_ field (or even switch completely to indexed="false") in this jira... https://issues.apache.org/jira/browse/SOLR-6337 ...if you try it out and find it works better for you, please post a comment with your experiences and any annecdotal performance impacts you notice. (real world use cases/observations are always helpful) -Hoss http://www.lucidworks.com/