Index: includes/DefaultSettings.php
===================================================================
--- includes/DefaultSettings.php	(revision 81862)
+++ includes/DefaultSettings.php	(working copy)
@@ -4575,6 +4575,17 @@
 );
 
 /**
+
+ * Jobs that must be explitly requested, these can be:
+ * 
+ * Very long running jobs.
+ * Jobs that you would never want to run as part of a page rendering request.
+ * Jobs that you want to run on specialized machines ( like transcoding, or a particular
+ * machine on your cluster has 'outside' web access you could restrict uploadFromUrl )
+ */
+wgJobExplicitRequestTypes = array();
+
+/**
  * Additional functions to be performed with updateSpecialPages.
  * Expensive Querypages are already updated.
  */
Index: includes/job/JobQueue.php
===================================================================
--- includes/job/JobQueue.php	(revision 81862)
+++ includes/job/JobQueue.php	(working copy)
@@ -89,6 +89,7 @@
 	 * @return Job or false if there's no jobs
 	 */
 	static function pop( $offset = 0 ) {
+		global $wgJobExplitRequestTypes;
 		wfProfileIn( __METHOD__ );
 
 		$dbr = wfGetDB( DB_SLAVE );
@@ -99,16 +100,22 @@
 			NB: If random fetch previously was used, offset
 				will always be ahead of few entries
 		*/
-
-		$row = $dbr->selectRow( 'job', '*', "job_id >= ${offset}", __METHOD__,
-			array( 'ORDER BY' => 'job_id', 'LIMIT' => 1 ) );
+		$conditions = array();
+		if( count( $wgJobExplicitRequestTypes ) != 0 ){
+			foreach( $wgJobExplicitRequestTypes as $cmdType){
+				$conditions[] = "job_cmd != '" . $dbr->strencode( $cmdType) . "'";
+			}
+		}
+		$row = $dbr->selectRow( 'job', '*', array_merge( $conditions, array( "job_id >= ${offset}" ) ) , __METHOD__,		
+			array('ORDER BY' => 'job_id', 'LIMIT' => 1 ) 
+		);
 
 		// Refetching without offset is needed as some of job IDs could have had delayed commits
 		// and have lower IDs than jobs already executed, blame concurrency :)
 		//
 		if ( $row === false ) {
 			if ( $offset != 0 ) {
-				$row = $dbr->selectRow( 'job', '*', '', __METHOD__,
+				$row = $dbr->selectRow( 'job', '*', $conditions, __METHOD__,
 					array( 'ORDER BY' => 'job_id', 'LIMIT' => 1 ) );
 			}