Do not scan for keys just get all the keys (with prefix)

Apparently scan leads to some issues sometimes on cluster. So just use
the get function to fetch the keys.

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

diff --git a/lib/private/Memcache/Redis.php b/lib/private/Memcache/Redis.php
index a154d08decad3af9b4c056e8a72a42fb5e91664f..dd7e929a82898a697b4f72c71c4fdb3a9511f3f1 100644 (file)
--- a/lib/private/Memcache/Redis.php
+++ b/lib/private/Memcache/Redis.php
@@ -79,12 +79,10 @@ class Redis extends Cache implements IMemcacheTTL {
 
        public function clear($prefix = '') {
                $prefix = $this->getNameSpace() . $prefix . '*';
-               $it = null;
-               self::$cache->setOption(\Redis::OPT_SCAN, \Redis::SCAN_RETRY);
-               while ($keys = self::$cache->scan($it, $prefix)) {
-                       self::$cache->del($keys);
-               }
-               return true;
+               $keys = self::$cache->keys($prefix);
+               $deleted = self::$cache->del($keys);
+
+               return count($keys) === $deleted;
        }
 
        /**