diff --git a/db/jig/mapper.php b/db/jig/mapper.php
index 52f36acb..ef878f13 100644
--- a/db/jig/mapper.php
+++ b/db/jig/mapper.php
@@ -153,7 +153,7 @@ function($expr) {
 	*	@return static[]|FALSE
 	*	@param $filter array
 	*	@param $options array
-	*	@param $ttl int
+	*	@param $ttl int|array
 	*	@param $log bool
 	**/
 	function find($filter=NULL,array $options=NULL,$ttl=0,$log=TRUE) {
@@ -170,9 +170,12 @@ function find($filter=NULL,array $options=NULL,$ttl=0,$log=TRUE) {
 		$db=$this->db;
 		$now=microtime(TRUE);
 		$data=[];
+		$tag='';
+		if (is_array($ttl))
+			list($ttl,$tag)=$ttl;
 		if (!$fw->CACHE || !$ttl || !($cached=$cache->exists(
 			$hash=$fw->hash($this->db->dir().
-				$fw->stringify([$filter,$options])).'.jig',$data)) ||
+				$fw->stringify([$filter,$options])).($tag?'.'.$tag:'').'.jig',$data)) ||
 			$cached[0]+$ttl<microtime(TRUE)) {
 			$data=$db->read($this->file);
 			if (is_null($data))
@@ -347,7 +350,7 @@ function reduce($key,$handler,$finalize=null){
 	*	@return int
 	*	@param $filter array
 	*	@param $options array
-	*	@param $ttl int
+	*	@param $ttl int|array
 	**/
 	function count($filter=NULL,array $options=NULL,$ttl=0) {
 		$now=microtime(TRUE);
diff --git a/db/mongo/mapper.php b/db/mongo/mapper.php
index d5645412..4ad4cdfe 100644
--- a/db/mongo/mapper.php
+++ b/db/mongo/mapper.php
@@ -119,7 +119,7 @@ function cast($obj=NULL) {
 	*	@param $fields string
 	*	@param $filter array
 	*	@param $options array
-	*	@param $ttl int
+	*	@param $ttl int|array
 	**/
 	function select($fields=NULL,$filter=NULL,array $options=NULL,$ttl=0) {
 		if (!$options)
@@ -130,10 +130,13 @@ function select($fields=NULL,$filter=NULL,array $options=NULL,$ttl=0) {
 			'limit'=>0,
 			'offset'=>0
 		];
+		$tag='';
+		if (is_array($ttl))
+			list($ttl,$tag)=$ttl;
 		$fw=\Base::instance();
 		$cache=\Cache::instance();
 		if (!($cached=$cache->exists($hash=$fw->hash($this->db->dsn().
-			$fw->stringify([$fields,$filter,$options])).'.mongo',
+			$fw->stringify([$fields,$filter,$options])).($tag?'.'.$tag:'').'.mongo',
 			$result)) || !$ttl || $cached[0]+$ttl<microtime(TRUE)) {
 			if ($options['group']) {
 				$grp=$this->collection->group(
@@ -194,7 +197,7 @@ function select($fields=NULL,$filter=NULL,array $options=NULL,$ttl=0) {
 	*	@return static[]
 	*	@param $filter array
 	*	@param $options array
-	*	@param $ttl int
+	*	@param $ttl int|array
 	**/
 	function find($filter=NULL,array $options=NULL,$ttl=0) {
 		if (!$options)
@@ -213,13 +216,16 @@ function find($filter=NULL,array $options=NULL,$ttl=0) {
 	*	@return int
 	*	@param $filter array
 	*	@param $options array
-	*	@param $ttl int
+	*	@param $ttl int|array
 	**/
 	function count($filter=NULL,array $options=NULL,$ttl=0) {
 		$fw=\Base::instance();
 		$cache=\Cache::instance();
+		$tag='';
+		if (is_array($ttl))
+			list($ttl,$tag)=$ttl;
 		if (!($cached=$cache->exists($hash=$fw->hash($fw->stringify(
-			[$filter])).'.mongo',$result)) || !$ttl ||
+			[$filter])).($tag?'.'.$tag:'').'.mongo',$result)) || !$ttl ||
 			$cached[0]+$ttl<microtime(TRUE)) {
 			$result=$this->collection->count($filter?:[]);
 			if ($fw->CACHE && $ttl)