diff --git a/library/Director/Objects/HostApplyMatches.php b/library/Director/Objects/HostApplyMatches.php
new file mode 100644
index 00000000..9c90d56c
--- /dev/null
+++ b/library/Director/Objects/HostApplyMatches.php
@@ -0,0 +1,109 @@
+<?php
+
+namespace Icinga\Module\Director\Objects;
+
+use Icinga\Application\Benchmark;
+use Icinga\Data\Filter\Filter;
+use Icinga\Data\Filter\FilterExpression;
+use Icinga\Module\Director\Db;
+use Icinga\Module\Director\Db\Cache\PrefetchCache;
+
+class HostApplyMatches
+{
+    protected static $flatObjects;
+
+    protected static $columnMap = array(
+        'name' => 'object_name'
+    );
+
+    /**
+     * @param Filter $filter
+     * @param Db $db
+     *
+     * @return array
+     */
+    public static function forFilter(Filter $filter, Db $db)
+    {
+        $result = array();
+        Benchmark::measure(sprintf('Starting Filter %s', $filter));
+        $filter = clone($filter);
+        static::fixFilterColumns($filter);
+        foreach (static::flatObjects($db) as $object) {
+            if ($filter->matches($object)) {
+                $name = $object->object_name;
+                $result[] = $name;
+            }
+        }
+        Benchmark::measure(sprintf('Got %d results for %s', count($result), $filter));
+
+        return array_values($result);
+    }
+
+    protected static function flatObjects(Db $db)
+    {
+        if (self::$flatObjects === null) {
+            self::$flatObjects = static::fetchFlatObjects($db);
+        }
+
+        return self::$flatObjects;
+    }
+
+    protected static function fetchFlatObjects(Db $db)
+    {
+        Benchmark::measure('HostApplyMatches: prefetching');
+        PrefetchCache::initialize($db);
+        $all = IcingaHost::prefetchAll($db);
+        IcingaZone::prefetchAll($db);
+        IcingaCommand::prefetchAll($db);
+        Benchmark::measure('HostApplyMatches: preparing flat objects');
+
+        $objects = array();
+        foreach ($all as $host) {
+            if ($host->isTemplate()) {
+                continue;
+            }
+            $object = $host->toPlainObject(true);
+            static::flattenVars($object);
+            $objects[$host->getObjectName()] = $object;
+        }
+        Benchmark::measure('HostApplyMatches: cache ready');
+
+        return $objects;
+    }
+
+    protected static function fixFilterColumns(Filter $filter)
+    {
+        if ($filter->isExpression()) {
+            /** @var FilterExpression $filter */
+            $col = $filter->getColumn();
+            if (substr($col, 0, 5) === 'host.') {
+                $filter->setColumn($col = substr($col, 5));
+            }
+            if (array_key_exists($col, self::$columnMap)) {
+                $filter->setColumn(self::$columnMap[$col]);
+            }
+            $filter->setExpression(json_decode($filter->getExpression()));
+        } else {
+            foreach ($filter->filters() as $sub) {
+                static::fixFilterColumns($sub);
+            }
+        }
+    }
+
+    protected static function flattenVars(& $object, $key = 'vars')
+    {
+        if (property_exists($object, 'vars')) {
+            foreach ($object->vars as $k => $v) {
+                if (is_object($v)) {
+                    static::flattenVars($v, $k);
+                }
+                $object->{$key . '.' . $k} = $v;
+            }
+            unset($object->vars);
+        }
+    }
+
+    protected function __construct()
+    {
+    }
+}
\ No newline at end of file
diff --git a/library/Director/Objects/IcingaService.php b/library/Director/Objects/IcingaService.php
index 64c5f228..f86003e0 100644
--- a/library/Director/Objects/IcingaService.php
+++ b/library/Director/Objects/IcingaService.php
@@ -2,6 +2,7 @@
 
 namespace Icinga\Module\Director\Objects;
 
+use Icinga\Data\Filter\Filter;
 use Icinga\Exception\ProgrammingError;
 use Icinga\Module\Director\Db;
 use Icinga\Module\Director\Data\PropertiesFilter;
@@ -174,8 +175,47 @@ class IcingaService extends IcingaObject
         return $this->renderRelationProperty('host', $this->host_id, 'host_name');
     }
 
+    public function toLegacyConfigString()
+    {
+        if ($this->get('assign_filter')) {
+            return $this->renderLegacyResolvedAssignFilter();
+        }
+
+        $str = parent::toLegacyConfigString();
+
+        if (! $this->isDisabled() && $this->host_id && $this->getRelated('host')->isDisabled()) {
+            return
+                "# --- This services host has been disabled ---\n"
+                . preg_replace('~^~m', '# ', trim($str))
+                . "\n\n";
+        } else {
+            return $str;
+        }
+    }
+
+    protected function renderLegacyResolvedAssignFilter()
+    {
+        $str = '';
+        $hosts = HostApplyMatches::forFilter(
+            Filter::fromQueryString($this->get('assign_filter')),
+            $this->getConnection()
+        );
+        $this->object_type = 'object';
+        $this->assign_filter = null;
+
+        foreach ($hosts as $hostname) {
+            $this->host = $hostname;
+            $str .= $this->toLegacyConfigString();
+        }
+
+        return $str;
+    }
+
     public function toConfigString()
     {
+        if ($this->get('service_set_id')) {
+            return '';
+        }
         $str = parent::toConfigString();
 
         if (! $this->isDisabled() && $this->host_id && $this->getRelated('host')->isDisabled()) {
@@ -282,6 +322,11 @@ class IcingaService extends IcingaObject
         return '';
     }
 
+    public function renderService_set()
+    {
+        return '';
+    }
+
     public function renderUse_var_overrides()
     {
         return '';
diff --git a/library/Director/Objects/IcingaServiceSet.php b/library/Director/Objects/IcingaServiceSet.php
index 4e996794..1f115a20 100644
--- a/library/Director/Objects/IcingaServiceSet.php
+++ b/library/Director/Objects/IcingaServiceSet.php
@@ -2,6 +2,7 @@
 
 namespace Icinga\Module\Director\Objects;
 
+use Icinga\Data\Filter\Filter;
 use Icinga\Exception\ProgrammingError;
 use Icinga\Module\Director\IcingaConfig\IcingaConfig;
 use Icinga\Module\Director\IcingaConfig\IcingaConfigHelper as c;
@@ -45,11 +46,11 @@ class IcingaServiceSet extends IcingaObject
     }
 
     /**
-     * @return IcingaService
+     * @return IcingaService[]
      */
     public function getServiceObjects()
     {
-        if ($this->host_id) {
+        if ($this->get('host_id')) {
             $imports = $this->imports()->getObjects();
             if (empty($imports)) {
                 return array();
@@ -62,7 +63,7 @@ class IcingaServiceSet extends IcingaObject
 
     protected function getServiceObjectsForSet(IcingaServiceSet $set)
     {
-        if ($set->id === null) {
+        if ($set->get('id') === null) {
             return array();
         }
 
@@ -70,7 +71,7 @@ class IcingaServiceSet extends IcingaObject
         $db = $this->getDb();
         $ids = $db->fetchCol(
             $db->select()->from('icinga_service', 'id')
-                ->where('service_set_id = ?', $set->id)
+                ->where('service_set_id = ?', $set->get('id'))
         );
 
         $services = array();
@@ -80,7 +81,7 @@ class IcingaServiceSet extends IcingaObject
                 'object_type' => 'template'
             ), $connection);
 
-            $services[$service->object_name] = $service;
+            $services[$service->getObjectName()] = $service;
         }
 
         return $services;
@@ -88,12 +89,13 @@ class IcingaServiceSet extends IcingaObject
 
     public function renderToConfig(IcingaConfig $config)
     {
-        if ($this->assign_filter === null && $this->isTemplate()) {
+        if ($this->get('assign_filter') === null && $this->isTemplate()) {
             return;
         }
 
         if ($config->isLegacy()) {
-            return $this->renderToLegacyConfig($config);
+            $this->renderToLegacyConfig($config);
+            return;
         }
 
         $file = $this->getConfigFileWithHeader($config);
@@ -103,19 +105,18 @@ class IcingaServiceSet extends IcingaObject
         // eventually clone them beforehand to not get into trouble with caches
         // figure out whether we might need a zone property
         foreach ($this->getServiceObjects() as $service) {
-            // TODO: make them REAL applies
-            if ($this->assign_filter) {
-                $service->object_type = 'apply';
-                $service->assign_filter = $this->assign_filter;
+            if ($filter = $this->get('assign_filter')) {
+                $service->set('object_type', 'apply');
+                $service->set('assign_filter', $filter);
+            } elseif ($hostId = $this->get('host_id')) {
+                $service->set('object_type', 'object');
+                $service->host_id = $this->host_id;
             } else {
-                $service->object_type = $this->object_type;
-                if ($this->isApplyRule()) {
-                    $service->assign_filter = $this->assign_filter;
-                }
+                // Service set template without assign filter or host
+                continue;
             }
 
-            $service->vars = $this->vars;
-            $service->host_id = $this->host_id;
+            $this->copyVarsToService($service);
             $file->addObject($service);
         }
     }
@@ -141,20 +142,26 @@ class IcingaServiceSet extends IcingaObject
         return sprintf($comment, $this->object_name);
     }
 
-    public function renderToLegacyConfig(IcingaConfig $config)
+    protected function copyVarsToService(IcingaService $service)
     {
-        if ($this->isTemplate()) {
-            return;
+        $serviceVars = $service->vars();
+
+        foreach ($this->vars() as $k => $var) {
+            $serviceVars->$k = $var;
         }
 
-        if ($this->isApplyRule()) {
-            // Not yet
+        return $this;
+    }
+
+    public function renderToLegacyConfig(IcingaConfig $config)
+    {
+        if ($this->assign_filter === null && $this->isTemplate()) {
             return;
         }
 
         // evaluate my assign rules once, get related hosts
         // Loop over all services belonging to this set
-        // generate every service with host_name host1,host2...
+        // generate every service with host_name host1,host2... -> not yet. And Zones?
 
         $file = $config->configFile(
             // TODO: zones.d?
@@ -162,21 +169,39 @@ class IcingaServiceSet extends IcingaObject
         );
 
         $file->prepend($this->getConfigHeaderComment($config));
+        $conn = $this->getConnection();
 
-        foreach ($this->getServiceObjects() as $service) {
-            $service->object_type = 'object';
-            $service->host_id = $this->host_id;
-            $service->vars = $this->vars;
-            $file->addLegacyObject($service);
+        // Delegating this to the service would look, but this way it's faster
+        if ($filter = $this->get('assign_filter')) {
+            $filter = Filter::fromQueryString($filter);
+            $hosts = HostApplyMatches::forFilter($filter, $conn);
+            foreach ($this->getServiceObjects() as $service) {
+                $service->set('object_type', 'object');
+                $this->copyVarsToService($service);
+
+                foreach ($hosts as $hostname) {
+                    $service->host = $hostname;
+                    $file->addLegacyObject($service);
+                }
+            }
+        } else {
+            foreach ($this->getServiceObjects() as $service) {
+                $service->set('object_type', 'object');
+                $service->set('host_id', $this->get('host_id'));
+                foreach ($this->vars() as $k => $var) {
+                    $service->$k = $var;
+                }
+                $file->addLegacyObject($service);
+            }
         }
     }
 
     public function getRenderingZone(IcingaConfig $config = null)
     {
-        if ($this->host_id === null) {
+        if ($this->get('host_id') === null) {
             return $this->connection->getDefaultGlobalZoneName();
         } else {
-            $host = $this->getRelatedObject('host', $this->host_id);
+            $host = $this->getRelatedObject('host', $this->get('host_id'));
             return $host->getRenderingZone($config);
         }
         return $zone;