diff --git a/RedisManager.php b/RedisManager.php
new file mode 100644
index 0000000..230651d
--- /dev/null
+++ b/RedisManager.php
@@ -0,0 +1,61 @@
+<?php
+/**
+ * @copyright NetMonsters <team@netmonsters.ru>
+ * @link http://netmonsters.ru
+ * @package Majestic
+ * @subpackage Redis
+ * @since 2010-07-17
+ * @version SVN: $Id$
+ * @filesource $URL$
+ */
+
+class RedisManager
+{
+    
+    /**
+     * Redis connections
+     * 
+     * @var array
+     */
+    static protected $connections = array();
+    
+    /**
+     * Connect to redis
+     * 
+     * @param string $name connection name. If not set 'default' will be used.
+     * @param array $config Configuration array.
+     *                       
+     * @return Redis
+     */
+    static public function connect($name = 'default', $config = null)
+    {
+        if (!isset(self::$connections[$name])) {
+            if (!$config) {
+                $config = Config::get('Redis')->$name;
+            }
+                
+            if (!is_array($config)) {
+                throw new Exception('Connection parameters must be an array');
+            }
+            
+            $host = isset($config['host']) ? $config['host'] : 'localhost';
+            $port = isset($config['port']) ? $config['port'] : 6379;
+            $database = isset($config['database']) ? $config['database'] : 0;
+            
+            /**
+             * @var Redis
+             */
+            $connection = new Redis();
+            if (!$connection->connect($host, $port)) {
+                throw new Exception('Failed to connect to Redis server at ' . $host . ':' . $port);
+            }
+            if ($database) {
+                if (!$connection->select($database)) {
+                    throw new Exception('Failed to select Redis database with index ' . $database);
+                }
+            }
+            self::$connections[$name] = $connection;
+        }
+        return self::$connections[$name];
+    }
+}
\ No newline at end of file
diff --git a/cache/CacheKey.php b/cache/CacheKey.php
index cd206e0..572518e 100644
--- a/cache/CacheKey.php
+++ b/cache/CacheKey.php
@@ -12,31 +12,33 @@
 class CacheKey
 {
 
+    /**
+     * @var Cacher
+     */
+    protected $cacher;
+    
+    /**
+     * @var CacheKey
+     */
     protected $key;
-    protected $params = '';
     protected $expire = 0;
 
     /**
+     * @param Cacher $cacher
      * @param string $key
      * @param mixed $params
-     * @param iCacheable $cacheable
+     * @param int $expire
      * @return CacheKey
      */
-    public function __construct($key, $params = array(), $cacheable)
+    public function __construct($cacher, $key, $params = array(), $expire = 0)
     {
+        $this->cacher  = $cacher;
         $this->key = $key;
-        if (!$cacheable instanceof iCacheable) {
-            throw new GeneralException('CacheKey depends on iCacheable instance');
+        if ($params) {
+            $params = (is_array($params)) ? implode('|', $params) : $params;
+            $this->key = $key . '_' .  $params;
         }
-        $this->cache  = $cacheable->getCache();
-        $this->expire = $cacheable->getKeyExpire($this->key);
-        $this->params = (is_array($params)) ? implode('|', $params) : $params;
-    }
-
-    protected function getCacheKey()
-    {
-        $params = ($this->params) ? ('_' . $this->params) : '';
-        return $this->key . $params;
+        $this->expire = $expire;
     }
 
     protected function getExpire()
@@ -54,7 +56,7 @@ class CacheKey
 
     public function get()
     {
-        return $this->cache->get($this->getCacheKey());
+        return $this->cacher->get($this->key);
     }
 
     /**
@@ -62,11 +64,11 @@ class CacheKey
      */
     public function set($value)
     {
-        return $this->cache->set($this->getCacheKey(), $value, $this->expire);
+        return $this->cacher->set($this->key, $value, $this->expire);
     }
 
     public function del()
     {
-        return $this->cache->del($this->getCacheKey());
+        return $this->cacher->del($this->key);
     }
 }
\ No newline at end of file
diff --git a/cache/CacheKeySet.php b/cache/CacheKeySet.php
deleted file mode 100644
index c470f78..0000000
--- a/cache/CacheKeySet.php
+++ /dev/null
@@ -1,48 +0,0 @@
-<?php
-/**
- * @copyright NetMonsters <team@netmonsters.ru>
- * @link http://netmonsters.ru
- * @package Majestic
- * @subpackage Cache
- * @since 2010-03-10
- * @version SVN: $Id$
- * @filesource $URL$
- */
-
-class CacheKeySet extends CacheKey
-{
-    public function get()
-    {
-        $set = $this->cache->get($this->key);
-        $item_key = $this->getCacheKey();
-        
-        if (!is_array($set) || !array_key_exists($item_key, $set)) {
-            return false;
-        }
-        return $this->cache->get($item_key);
-    }
-    
-    /**
-     * @param mixed $value
-     */
-    public function set($value)
-    {
-        $set = $this->cache->get($this->key);
-        if (!is_array($set)) {
-            $set = array();
-        }
-        
-        $item_key = $this->getCacheKey();
-        if (!$this->cache->set($item_key, $value, $this->expire)) {
-            return false;
-        }
-        
-        $set[$item_key] = $this->cache->getExpire($this->expire);
-        return $this->cache->set($this->key, $set, $this->expire);
-    }
-    
-    public function del()
-    {
-        return $this->cache->del($this->key);
-    }
-}
\ No newline at end of file
diff --git a/cache/MemcacheCache.php b/cache/MemcacheCache.php
index 7caa6e7..a5f72e2 100644
--- a/cache/MemcacheCache.php
+++ b/cache/MemcacheCache.php
@@ -26,7 +26,6 @@ class MemcacheCache extends Cache
      */
     protected $expire = 3600;
     
-    protected $keys = array();
     
     public function __construct($config)
     {
@@ -150,19 +149,11 @@ class MemcacheCache extends Cache
      */
     protected function getKey($key)
     {
-        if (!isset($this->keys[$key])) {
-            $this->keys[$key] = md5($this->key_salt . $key);
-        }
-        return $this->keys[$key];
+        return md5($this->key_salt . $key);
     }
     
     public function getExpire($expire)
     {
         return ($expire > 0) ? $expire : $this->expire;
     }
-    
-    public function cleanKeys()
-    {
-        $this->keys = array();
-    }
 }
\ No newline at end of file
diff --git a/cache/iCacheable.php b/cache/iCacheable.php
deleted file mode 100644
index 4f6b48b..0000000
--- a/cache/iCacheable.php
+++ /dev/null
@@ -1,24 +0,0 @@
-<?php
-/**
- * @copyright NetMonsters <team@netmonsters.ru>
- * @link http://netmonsters.ru
- * @package Majestic
- * @subpackage cache
- * @since 2010-03-12
- * @version SVN: $Id$
- * @filesource $URL$
- */
-
-interface iCacheable
-{
-    /**
-     * @return Cache
-     */
-    public function getCache();
-    
-    /**
-     * @param string $key
-     * @return Expiration time in seconds
-     */
-    public function getKeyExpire($key);
-}
\ No newline at end of file
diff --git a/model/DbStatement.php b/model/DbStatement.php
index adf4b08..301c574 100644
--- a/model/DbStatement.php
+++ b/model/DbStatement.php
@@ -151,6 +151,9 @@ abstract class DbStatement
         return false;
     }
     
+    /**
+     * @return array
+     */
     public function fetchPairs()
     {
         $data = array();
@@ -179,4 +182,4 @@ abstract class DbStatement
      * @return bool
      */
     abstract protected function driverExecute($sql);
-}
\ No newline at end of file
+}
diff --git a/model/Model.php b/model/Model.php
index dee4e7a..c57ea9b 100644
--- a/model/Model.php
+++ b/model/Model.php
@@ -12,7 +12,7 @@
  * @filesource $URL$
  */
 
-abstract class Model implements iCacheable
+abstract class Model
 {
 
     /**
@@ -45,13 +45,12 @@ abstract class Model implements iCacheable
 
     protected $table;
 
-    protected $connection = 'default';
-
-    protected $key        = 'id';
+    protected $key          = 'id';
+    
 
-    public function __construct()
+    public function __construct($connection = 'default')
     {
-        $this->db = Db::connect($this->connection);
+        $this->db = Db::connect($connection);
     }
 
     /**
@@ -59,7 +58,7 @@ abstract class Model implements iCacheable
      */
     public function getInsertId()
     {
-        return $this->db->getInsertId($this->table(false), $this->key);
+        return $this->db->getInsertId($this->table(), $this->key);
     }
 
     /**
@@ -86,7 +85,7 @@ abstract class Model implements iCacheable
      */
     public function get($id)
     {
-        $sql = 'SELECT * FROM ' . $this->table() . ' WHERE ' . $this->identify($this->key) . '=?';
+        $sql = 'SELECT * FROM :table WHERE :pk=?';
         return $this->fetch($sql, $id);
     }
 
@@ -97,7 +96,7 @@ abstract class Model implements iCacheable
      */
     public function insert($data, $on_duplicate = array())
     {
-        $affected = $this->db->insert($this->table(false), $data, $on_duplicate);
+        $affected = $this->db->insert($this->table(), $data, $on_duplicate);
         return ($this->getInsertId()) ? $this->getInsertId() : $affected;
     }
 
@@ -111,33 +110,28 @@ abstract class Model implements iCacheable
         if (is_int($where)) {
             $where = $this->identify($this->key) . '=' . (int) $where;
         }
-        return $this->db->update($this->table(false), $data, $where);
+        return $this->db->update($this->table(), $data, $where);
     }
 
     /**
-     * @param int|array $where Int or array ids
+     * @param int $id Int id
      * @return int Number of affected rows
      */
-    public function delete($where)
+    public function delete($id)
     {
-        if (is_array($where)) {
-            $where = $this->identify($this->key) . ' IN (' . $this->quote($where) . ')';
-        } else {
-            $where = $this->identify($this->key) . '=' . (int) $where;
-        }
-        return $this->db->delete($this->table(false), $where);
+        $where = $this->identify($this->key) . '=' . (int) $id;
+        return $this->db->delete($this->table(), $where);
     }
-
+    
     /**
-     * @param bool $autoindent
      * @return string
      */
-    protected function table($autoindent = true)
+    protected function table()
     {
         if (!$this->table) {
             $this->table = substr(strtolower(get_class($this)), 0, -5/*strlen('Model')*/);
         }
-        return $autoindent ? $this->identify($this->table) : $this->table;
+        return $this->table;
     }
     
     /**
@@ -180,65 +174,33 @@ abstract class Model implements iCacheable
     }
 
     /**
-     * @return Cache
-     */
-    public function getCache()
-    {
-        if (!$this->cache) {
-            $this->cache = Cacher::get(Config::get(__CLASS__, 'MemcacheCache'));
-        }
-        return $this->cache;
-    }
-    
-    /**
-     * @param string $key
-     * @return int
-     */
-    public function getKeyExpire($key)
-    {
-        return (isset($this->cache_keys[$key])) ? ($this->cache_keys[$key] * 60) : 0;
-    }
-    
-    /**
-     * @param string $name
-     * @param array $params
-     * @return CacheKey
+     * This method appends to params table and primary key.
+     * So they can be accessed thru `:table` and `:pk` placeholders.
+     * 
+     * @return DbStatement
      */
-    protected function cacheKey($name, $params = array())
+    protected function query($sql, $params = array()) 
     {
-        if (substr(strtolower($name), -3, 3) == 'set') {
-            return new CacheKeySet($name, $params, $this);
+        if (!is_array($params)) {
+            $params = array($params);
         }
-        return new CacheKey($name, $params, $this);
+        $params = array(
+            'table' => new DbExpr($this->identify($this->table())),
+            'pk' => new DbExpr($this->identify($this->key)),
+        ) + $params;
+        return $this->db->query($sql, $params);
     }
-    
-    /**
-     * @param CacheKey | CacheKeySet $cache
-     */
-    protected function addCleanCache($cache)
-    {
-        $this->caches_clean[] = $cache;
-    }
-    
-    protected function cleanCaches()
-    {
-        // cleaning caches
-        foreach ($this->caches_clean as $cache) {
-            $cache->del();
-        }
-        $this->caches_clean = array();
-    }
-    
+
     /**
      * @param string $sql
      * @param array $params
      * @param string $field
-     * @param CacheKey | CacheKeySet $cache_key
+     * @param CacheKey $cache_key
      */
     protected function fetchField($sql, $params = array(), $field, $cache_key = null)
     {
         if (!$cache_key || !$result = $cache_key->get()) {
-            $result = $this->db->query($sql, $params)->fetchField($field);
+            $result = $this->query($sql, $params)->fetchField($field);
             if ($cache_key) {
                 $cache_key->set($result);
             }
@@ -249,12 +211,12 @@ abstract class Model implements iCacheable
     /**
      * @param string $sql
      * @param array $params
-     * @param CacheKey | CacheKeySet $cache_key
+     * @param CacheKey $cache_key
      */
     protected function fetch($sql, $params = array(), $cache_key = null)
     {
         if (!$cache_key || !$result = $cache_key->get()) {
-            $result = $this->db->query($sql, $params)->fetch();
+            $result = $this->query($sql, $params)->fetch();
             if ($cache_key) {
                 $cache_key->set($result);
             }
@@ -265,16 +227,57 @@ abstract class Model implements iCacheable
     /**
      * @param string $sql
      * @param array $params
-     * @param CacheKey | CacheKeySet $cache_key
+     * @param CacheKey $cache_key
      */
     protected function fetchAll($sql, $params = array(), $cache_key = null)
     {
         if (!$cache_key || !$result = $cache_key->get()) {
-            $result = $this->db->query($sql, $params)->fetchAll();
+            $result = $this->query($sql, $params)->fetchAll();
             if ($cache_key) {
                 $cache_key->set($result);
             }
         }
         return $result;
     }
-}
+    
+    /* Cache workaround */
+    
+    /**
+     * @return Cache
+     */
+    public function getCache()
+    {
+        if (!$this->cache) {
+            $this->cache = Cacher::get(Config::get(__CLASS__, 'MemcacheCache'));
+        }
+        return $this->cache;
+    }
+    
+    /**
+     * @param string $name
+     * @param array $params
+     * @return CacheKey
+     */
+    protected function cacheKey($name, $params = array())
+    {
+        $expire = (isset($this->cache_keys[$name])) ? ($this->cache_keys[$name] * 60) : 0;
+        return new CacheKey($this->getCache(), $name, $params, $expire);
+    }
+    
+    /**
+     * @param CacheKey $cache
+     */
+    protected function addCleanCache($cache)
+    {
+        $this->caches_clean[] = $cache;
+    }
+    
+    protected function cleanCaches()
+    {
+        // cleaning caches
+        foreach ($this->caches_clean as $cache) {
+            $cache->del();
+        }
+        $this->caches_clean = array();
+    }
+}
\ No newline at end of file
diff --git a/session/Session.model.php b/session/Session.model.php
index fd54b84..22d57cd 100644
--- a/session/Session.model.php
+++ b/session/Session.model.php
@@ -34,7 +34,7 @@ class SessionModel extends Model
 
     public function read($id)
     {
-        $sql = 'SELECT `data` FROM ' . $this->table() . ' WHERE `id`=? AND `expires` > UNIX_TIMESTAMP()';
+        $sql = 'SELECT `data` FROM :table WHERE `id`=? AND `expires` > UNIX_TIMESTAMP()';
         return (string) $this->fetchField($sql, $id, 'data');
     }
 
@@ -45,21 +45,23 @@ class SessionModel extends Model
         
         $ip = Env::Server('HTTP_X_FORWARDED_FOR', Env::Server('REMOTE_ADDR'));
         
-        $sql = 'INSERT INTO ' . $this->table() . ' (`id`, `expires`, `ip`, `user_id`, `data`)'
-             . ' VALUES(' . $this->quote($id) . ', UNIX_TIMESTAMP() + ' . (int) $this->life_time . ', INET_ATON(' . $this->quote($ip)  . '), ' . $user_id . ', ' . $this->quote($data) . ')'
-             . ' ON DUPLICATE KEY UPDATE `expires`=UNIX_TIMESTAMP() + ' . (int) $this->life_time . ', `ip`=INET_ATON(' . $this->quote($ip) . '), `user_id`=' . $user_id . ', `data`=' . $this->quote($data);
-        $affected = $this->db->query($sql)->affectedRows();
-        return (bool) ($this->getInsertId()) ? $this->getInsertId() : $affected;
+        $update = array(
+            'expires' => new DbExpr('UNIX_TIMESTAMP() + ' . (int) $this->life_time),
+            'ip' => new DbExpr('INET_ATON(' . $this->quote($ip)  . ')'),
+            'user_id' => $user_id, 
+            'data' => $data
+        );
+        return (bool) $this->insert(array('id' => $id) + $update, $update);
     }
 
     public function destroy($id)
     {
-        return (bool) $this->db->delete($this->table(false), array('`id`=?' => (string) $id));
+        return (bool) $this->db->delete($this->table(), array('`id`=?' => (string) $id));
     }
 
     public function gc($max_life_time)
     {
-        return (bool) $this->db->delete($this->table(false), '`expires` < UNIX_TIMESTAMP()');
+        return (bool) $this->db->delete($this->table(), '`expires` < UNIX_TIMESTAMP()');
     }
     
     /* End of Session handler methods */
@@ -67,6 +69,6 @@ class SessionModel extends Model
     
     public function destroyByUserId($user_id)
     {
-        return $this->db->delete($this->table(false), array('`user_id`=?' => $user_id));
+        return $this->db->delete($this->table(), array('`user_id`=?' => $user_id));
     }
 }
\ No newline at end of file