title: Hibernate Search Default Directory Provider
body: <p>I just asked myself what is the default value for the Hibernate Search directory provider? </p>
  
  <p>I've uncomment the property setting "hibernate.search.default.directory_provider" inside my persistence.xml. Hibernate Search is still working. I just ask myself at which place the Lucene index is stored. Is "ram" the default directory provider if no other value is provided?</p>
  
  <p>I did not find any information about a default or fall back value for this property. </p>