Index: contrib/benchmark/src/java/org/apache/lucene/benchmark/byTask/feeds/TrecContentSource.java
===================================================================
--- contrib/benchmark/src/java/org/apache/lucene/benchmark/byTask/feeds/TrecContentSource.java	(revision 835502)
+++ contrib/benchmark/src/java/org/apache/lucene/benchmark/byTask/feeds/TrecContentSource.java	(working copy)
@@ -48,6 +48,7 @@
  * <li><b>html.parser</b> - specifies the {@link HTMLParser} class to use for
  * parsing the TREC documents content (<b>default=DemoHTMLParser</b>).
  * <li><b>content.source.encoding</b> - if not specified, ISO-8859-1 is used.
+ * <li><b>content.source.excludeIteration</b> - if true, do not append iteration number to docname
  * </ul>
  */
 public class TrecContentSource extends ContentSource {
@@ -91,6 +92,7 @@
   BufferedReader reader;
   int iteration = 0;
   HTMLParser htmlParser;
+  private boolean excludeDocnameIteration;
   
   private DateFormatInfo getDateFormatInfo() {
     DateFormatInfo dfi = dateFormats.get();
@@ -256,7 +258,8 @@
       read(docBuf, DOCNO, true, false, null);
       name = docBuf.substring(DOCNO.length(), docBuf.indexOf(TERMINATING_DOCNO,
           DOCNO.length()));
-      name = name + "_" + iteration;
+      if (!excludeDocnameIteration)
+        name = name + "_" + iteration;
 
       // 3. skip until doc header
       docBuf.setLength(0);
@@ -342,6 +345,7 @@
     if (encoding == null) {
       encoding = "ISO-8859-1";
     }
+    excludeDocnameIteration = config.get("content.source.excludeIteration", false);
   }
 
 }