diff --git a/core/lib/Drupal/Core/Config/CachedStorage.php b/core/lib/Drupal/Core/Config/CachedStorage.php
index 2aa93e8..d753e78 100644
--- a/core/lib/Drupal/Core/Config/CachedStorage.php
+++ b/core/lib/Drupal/Core/Config/CachedStorage.php
@@ -120,7 +120,7 @@ public function write($name, array $data) {
       // While not all written data is read back, setting the cache instead of
       // just deleting it avoids cache rebuild stampedes.
       $this->cache->set($name, $data, CacheBackendInterface::CACHE_PERMANENT);
-      $this->cache->deleteTags(array('list_all' => TRUE));
+      $this->cache->deleteTags(array('listAll' => TRUE));
       $this->listAllCache = array();
       return TRUE;
     }
@@ -135,7 +135,7 @@ public function delete($name) {
     // rebuilding the cache before the storage is gone.
     if ($this->storage->delete($name)) {
       $this->cache->delete($name);
-      $this->cache->deleteTags(array('list_all' => TRUE));
+      $this->cache->deleteTags(array('listAll' => TRUE));
       $this->listAllCache = array();
       return TRUE;
     }
@@ -151,7 +151,7 @@ public function rename($name, $new_name) {
     if ($this->storage->rename($name, $new_name)) {
       $this->cache->delete($name);
       $this->cache->delete($new_name);
-      $this->cache->deleteTags(array('list_all' => TRUE));
+      $this->cache->deleteTags(array('listAll' => TRUE));
       $this->listAllCache = array();
       return TRUE;
     }
diff --git a/core/lib/Drupal/Core/Config/DatabaseStorage.php b/core/lib/Drupal/Core/Config/DatabaseStorage.php
index 3d43a8c..5779b31 100644
--- a/core/lib/Drupal/Core/Config/DatabaseStorage.php
+++ b/core/lib/Drupal/Core/Config/DatabaseStorage.php
@@ -87,6 +87,29 @@ public function read($name) {
   }
 
   /**
+   * Implements Drupal\Core\Config\StorageInterface::read().
+   *
+   *
+   * @param array $names
+   */
+  public function readMultiple(array $names) {
+    // There are situations, like in the installer, where we may attempt a
+    // read without actually having the database available. In this case,
+    // catch the exception and just return an empty array so the caller can
+    // handle it if need be.
+    $list = array();
+    try {
+      $list = $this->connection->query('SELECT name, data FROM {' . $this->connection->escapeTable($this->table) . '} WHERE name IN (:names)', array(':names' => $names), $this->options)->fetchAllKeyed();
+      foreach ($list as &$data) {
+        $data = $this->decode($data);
+      }
+    }
+    catch (Exception $e) {
+    }
+    return $list;
+  }
+
+  /**
    * Implements Drupal\Core\Config\StorageInterface::write().
    *
    * @throws PDOException