> I just have want know that does the lucene used the tries data structure > to > store the > data.
Lucene (and Solr) will use whatever you tell it when you create the field. If you indicate in your schema fieldType that you want to use a class of solr.TrieIntField, then the field will use a Lucene trie type that holds integers. Similar for TrieLongField, TrieFloatField, etc. Thanks, Shawn