diff --git a/sphinx.conf b/sphinx.conf
index 7e8e9c7..a61dce8 100644
--- a/sphinx.conf
+++ b/sphinx.conf
@@ -12,6 +12,7 @@ source files_index
 	sql_db			= btsearch
 	sql_port		= 3306	# optional, default is 3306
 
+	sql_query_pre 		= REPLACE INTO sphinx_counter SELECT 1, MAX(fileid) FROM torrents
 	sql_query		= \
 		SELECT fls.fileid, fls.path, fls.size as filesize, \
 		    torrents.hash as hash, torrents.name as name, torrents.size as size,  \
@@ -33,7 +34,6 @@ source files_index
 	sql_attr_string = contentCategory
 }
 
-
 index files_index
 {
 	source			= files_index
@@ -41,6 +41,23 @@ index files_index
 	min_word_len = 3
 }
 
+source files_index_delta : files_index
+{
+	sql_query		= \
+		SELECT fls.fileid, fls.path, fls.size as filesize, \
+		    torrents.hash as hash, torrents.name as name, torrents.size as size,  \
+		    torrents.seeders, torrents.leechers, torrents.completed, \
+		    torrents.files, torrents.contentType, torrents.contentCategory \
+		FROM files as fls INNER JOIN torrents ON(torrents.hash = fls.hash) \
+		WHERE fls.fileid > ( SELECT max_doc_id FROM sphinx_counter WHERE counter_id = 1 )
+}
+
+index files_index_delta : files_index
+{
+    source = files_index_delta
+    path = /var/data/files.delta
+}
+
 source torrents_index
 {
 	type			= mysql
@@ -51,6 +68,7 @@ source torrents_index
 	sql_db			= btsearch
 	sql_port		= 3306	# optional, default is 3306
 
+	sql_query_pre 		= REPLACE INTO sphinx_counter SELECT 2, MAX(torrentid) FROM torrents
 	sql_query		= \
 		SELECT torrents.torrentid, torrents.hash as hash, torrents.name as name, torrents.size as size,  \
 		    torrents.seeders, torrents.leechers, torrents.completed, \
@@ -68,7 +86,6 @@ source torrents_index
 	sql_attr_string = contentCategory
 }
 
-
 index torrents_index
 {
 	source			= torrents_index
@@ -76,6 +93,23 @@ index torrents_index
 	min_word_len = 3
 }
 
+source torrents_index_delta : torrents_index
+{
+	sql_query		= \
+		SELECT torrents.torrentid, torrents.hash as hash, torrents.name as name, torrents.size as size,  \
+		    torrents.seeders, torrents.leechers, torrents.completed, \
+		    torrents.files, torrents.contentType, torrents.contentCategory \
+		FROM torrents \
+		WHERE torrents.torrentid > ( SELECT max_doc_id FROM sphinx_counter WHERE counter_id = 2 )
+}
+
+index torrents_index_delta : torrents_index
+{
+    source = torrents_index_delta
+    path = /var/data/torrents.delta
+}
+
+
 
 indexer
 {