diff --git a/solr/example/solr/collection1/conf/schema.xml b/solr/example/solr/collection1/conf/schema.xml
index 75fad489f25..83fa36b25f0 100755
--- a/solr/example/solr/collection1/conf/schema.xml
+++ b/solr/example/solr/collection1/conf/schema.xml
@@ -107,6 +107,11 @@
    -->
         
    <field name="id" type="string" indexed="true" stored="true" required="true" multiValued="false" /> 
+
+   <!-- points to the root document of a block of nested documents -->
+   <field name="_root_" type="string" indexed="true" stored="false"/>
+
+
    <field name="sku" type="text_en_splitting_tight" indexed="true" stored="true" omitNorms="true"/>
    <field name="name" type="text_general" indexed="true" stored="true"/>
    <field name="manu" type="text_general" indexed="true" stored="true" omitNorms="true"/>
diff --git a/solr/example/solr/collection1/conf/solrconfig.xml b/solr/example/solr/collection1/conf/solrconfig.xml
index 8e990752578..7b967f91d20 100755
--- a/solr/example/solr/collection1/conf/solrconfig.xml
+++ b/solr/example/solr/collection1/conf/solrconfig.xml
@@ -514,6 +514,13 @@
                    initialSize="512"
                    autowarmCount="0"/>
     
+    <!-- custom cache currently used by block join --> 
+    <cache name="perSegFilter"
+      class="solr.search.LRUCache"
+      size="10"
+      initialSize="0"
+      autowarmCount="10" />
+
     <!-- Field Value Cache
          
          Cache used to hold field values that are quickly accessible