For both cluster-ready implementations JBoss Cache, JGroups and Changes Filter values must be defined. Shared index requires some kind of remote or shared file system to be attached in a system (i.e. NFS, SMB or etc). Indexing directory ("indexDir" value) must point to it. Setting "changesfilter-class" to "org.exoplatform.services.jcr.impl.core.query.jbosscache.JBossCacheIndexChangesFilter" will enable shared index implementation.

<workspace name="ws">

   <query-handler class="org.exoplatform.services.jcr.impl.core.query.lucene.SearchIndex">

      <properties>

         <property name="index-dir" value="/mnt/nfs_drive/index/db1/ws" />

         <property name="changesfilter-class"

            value="org.exoplatform.services.jcr.impl.core.query.jbosscache.JBossCacheIndexChangesFilter" />

         <property name="jbosscache-configuration" value="jbosscache-indexer.xml" />

         <property name="jgroups-configuration" value="udp-mux.xml" />

         <property name="jgroups-multiplexer-stack" value="false" />

         <property name="jbosscache-cluster-name" value="JCR-cluster-indexer" />

         <property name="max-volatile-time" value="60" />

         <property name="rdbms-reindexing" value="true" />

         <property name="reindexing-page-size" value="1000" />

         <property name="index-recovery-mode" value="from-coordinator" />

         <property name="jbosscache-shareable" value="true" />

      </properties>

   </query-handler>

</workspace>

In order to use cluster-ready strategy based on local indexes, when each node has own copy of index on local file system, the following configuration must be applied. Indexing directory must point to any folder on local file system and "changesfilter-class" must be set to "org.exoplatform.services.jcr.impl.core.query.jbosscache.LocalIndexChangesFilter".

<workspace name="ws">

   <query-handler class="org.exoplatform.services.jcr.impl.core.query.lucene.SearchIndex">

      <properties>

         <property name="index-dir" value="/mnt/nfs_drive/index/db1/ws" />

         <property name="changesfilter-class"

            value="org.exoplatform.services.jcr.impl.core.query.jbosscache.LocalIndexChangesFilter" />

         <property name="jbosscache-configuration" value="jbosscache-indexer.xml" />

         <property name="jgroups-configuration" value="udp-mux.xml" />

         <property name="jgroups-multiplexer-stack" value="false" />

         <property name="jbosscache-cluster-name" value="JCR-cluster-indexer" />

         <property name="max-volatile-time" value="60" />

         <property name="rdbms-reindexing" value="true" />

         <property name="reindexing-page-size" value="1000" />

         <property name="index-recovery-mode" value="from-coordinator" />

         <property name="jbosscache-shareable" value="true" />

      </properties>

   </query-handler>

</workspace>