Magento priority configuration for TwoLevels cache backend

gistfile1.diff

Index: app/code/core/Mage/Core/Model/Cache.php
===================================================================
--- app/code/core/Mage/Core/Model/Cache.php	(revision 124392)
+++ app/code/core/Mage/Core/Model/Cache.php	(working copy)
@@ -44,7 +44,7 @@
     /**
      * Cache frontend API
      *
-     * @var Zend_Cache_Core
+     * @var Varien_Cache_Core
      */
     protected $_frontend    = null;
 
@@ -115,6 +115,9 @@
         $this->_frontend = Zend_Cache::factory('Varien_Cache_Core', $backend['type'], $frontend, $backend['options'],
             true, true, true
         );
+        if (isset($options['default_priority'])) {
+        	$this->_frontend->setDefaultPriority($options['default_priority']);
+        }
 
         if (isset($options['request_processors'])) {
             $this->_requestProcessors = $options['request_processors'];
@@ -235,7 +238,7 @@
         $options['fast_backend_autoload']       = true;
         $options['slow_backend_custom_naming']  = true;
         $options['slow_backend_autoload']       = true;
-
+        
         if (isset($cacheOptions['auto_refresh_fast_cache'])) {
             $options['auto_refresh_fast_cache'] = (bool)$cacheOptions['auto_refresh_fast_cache'];
         } else {
Index: lib/Zend/Cache/Backend/TwoLevels.php
===================================================================
--- lib/Zend/Cache/Backend/TwoLevels.php	(revision 124392)
+++ lib/Zend/Cache/Backend/TwoLevels.php	(working copy)
@@ -443,7 +443,7 @@
             'automatic_cleaning' => $slowBackendCapabilities['automatic_cleaning'],
             'tags' => $slowBackendCapabilities['tags'],
             'expired_read' => $slowBackendCapabilities['expired_read'],
-            'priority' => $slowBackendCapabilities['priority'],
+            'priority' => true,
             'infinite_lifetime' => $slowBackendCapabilities['infinite_lifetime'],
             'get_list' => $slowBackendCapabilities['get_list']
         );
Index: lib/Varien/Cache/Core.php
===================================================================
--- lib/Varien/Cache/Core.php	(revision 124392)
+++ lib/Varien/Cache/Core.php	(working copy)
@@ -26,6 +26,23 @@
 
 class Varien_Cache_Core extends Zend_Cache_Core
 {
+	
+	/**
+	 * @var int default cache priority
+	 */
+	protected $defaultPriority = 8;
+	
+	/**
+	 * Set default priority
+	 * 
+	 * @param int $defaultPriority
+	 * @return Varien_Cache_Core
+	 */
+	public function setDefaultPriority($defaultPriority) {
+		$this->defaultPriority = $defaultPriority;
+		return $this;
+	}
+	
     /**
      * Make and return a cache id
      *
@@ -70,8 +87,11 @@
      * @throws Zend_Cache_Exception
      * @return boolean True if no problem
      */
-    public function save($data, $id = null, $tags = array(), $specificLifetime = false, $priority = 8)
+    public function save($data, $id = null, $tags = array(), $specificLifetime = false, $priority = NULL)
     {
+    	if (is_null($priority)) {
+    		$priority = $this->defaultPriority;
+    	}
         $tags = $this->_tags($tags);
         return parent::save($data, $id, $tags, $specificLifetime, $priority);
     }