diff --git a/boot.php b/boot.php
index a4588b3f73..249fd9a891 100644
--- a/boot.php
+++ b/boot.php
@@ -41,7 +41,7 @@ define('FRIENDICA_PLATFORM',     'Friendica');
 define('FRIENDICA_CODENAME',     'The Tazmans Flax-lily');
 define('FRIENDICA_VERSION',      '2018.08-dev');
 define('DFRN_PROTOCOL_VERSION',  '2.23');
-define('DB_UPDATE_VERSION',      1274);
+define('DB_UPDATE_VERSION',      1275);
 define('NEW_UPDATE_ROUTINE_VERSION', 1170);
 
 /**
diff --git a/src/Core/Cache/AbstractCacheDriver.php b/src/Core/Cache/AbstractCacheDriver.php
new file mode 100644
index 0000000000..6974dff1bd
--- /dev/null
+++ b/src/Core/Cache/AbstractCacheDriver.php
@@ -0,0 +1,23 @@
+<?php
+
+namespace Friendica\Core\Cache;
+use Friendica\BaseObject;
+
+
+/**
+ * Abstract class for common used functions
+ *
+ * Class AbstractCacheDriver
+ *
+ * @package Friendica\Core\Cache
+ */
+abstract class AbstractCacheDriver extends BaseObject implements IMemoryCacheDriver
+{
+	/**
+	 * @param string $key	The original key
+	 * @return string		The cache key used for the cache
+	 */
+	protected function getCacheKey($key) {
+		return self::getApp()->get_hostname() . ":" . $key;
+	}
+}
\ No newline at end of file
diff --git a/src/Core/Cache/ArrayCache.php b/src/Core/Cache/ArrayCache.php
index 71610c39df..714021c723 100644
--- a/src/Core/Cache/ArrayCache.php
+++ b/src/Core/Cache/ArrayCache.php
@@ -12,7 +12,7 @@ use Friendica\Core\Cache;
  *
  * @package Friendica\Core\Cache
  */
-class ArrayCache implements IMemoryCacheDriver
+class ArrayCache extends AbstractCacheDriver
 {
 	use TraitCompareDelete;
 
diff --git a/src/Core/Cache/MemcacheCacheDriver.php b/src/Core/Cache/MemcacheCacheDriver.php
index 8eb45d907e..9c16d55312 100644
--- a/src/Core/Cache/MemcacheCacheDriver.php
+++ b/src/Core/Cache/MemcacheCacheDriver.php
@@ -2,7 +2,6 @@
 
 namespace Friendica\Core\Cache;
 
-use Friendica\BaseObject;
 use Friendica\Core\Cache;
 
 /**
@@ -10,7 +9,7 @@ use Friendica\Core\Cache;
  *
  * @author Hypolite Petovan <mrpetovan@gmail.com>
  */
-class MemcacheCacheDriver extends BaseObject implements IMemoryCacheDriver
+class MemcacheCacheDriver extends AbstractCacheDriver
 {
 	use TraitCompareSet;
 	use TraitCompareDelete;
@@ -39,9 +38,10 @@ class MemcacheCacheDriver extends BaseObject implements IMemoryCacheDriver
 	public function get($key)
 	{
 		$return = null;
+		$cachekey = $this->getCacheKey($key);
 
 		// We fetch with the hostname as key to avoid problems with other applications
-		$cached = $this->memcache->get(self::getApp()->get_hostname() . ':' . $key);
+		$cached = $this->memcache->get($cachekey);
 
 		// @see http://php.net/manual/en/memcache.get.php#84275
 		if (is_bool($cached) || is_double($cached) || is_long($cached)) {
@@ -65,17 +65,19 @@ class MemcacheCacheDriver extends BaseObject implements IMemoryCacheDriver
 	 */
 	public function set($key, $value, $ttl = Cache::FIVE_MINUTES)
 	{
+		$cachekey = $this->getCacheKey($key);
+
 		// We store with the hostname as key to avoid problems with other applications
 		if ($ttl > 0) {
 			return $this->memcache->set(
-				self::getApp()->get_hostname() . ":" . $key,
+				$cachekey,
 				serialize($value),
 				MEMCACHE_COMPRESSED,
 				time() + $ttl
 			);
 		} else {
 			return $this->memcache->set(
-				self::getApp()->get_hostname() . ":" . $key,
+				$cachekey,
 				serialize($value),
 				MEMCACHE_COMPRESSED
 			);
@@ -87,7 +89,8 @@ class MemcacheCacheDriver extends BaseObject implements IMemoryCacheDriver
 	 */
 	public function delete($key)
 	{
-		return $this->memcache->delete($key);
+		$cachekey = $this->getCacheKey($key);
+		return $this->memcache->delete($cachekey);
 	}
 
 	/**
@@ -103,6 +106,7 @@ class MemcacheCacheDriver extends BaseObject implements IMemoryCacheDriver
 	 */
 	public function add($key, $value, $ttl = Cache::FIVE_MINUTES)
 	{
-		return $this->memcache->add(self::getApp()->get_hostname() . ":" . $key, $value, $ttl);
+		$cachekey = $this->getCacheKey($key);
+		return $this->memcache->add($cachekey, $value, $ttl);
 	}
 }
diff --git a/src/Core/Cache/MemcachedCacheDriver.php b/src/Core/Cache/MemcachedCacheDriver.php
index dda36ba19c..52b6a08cf1 100644
--- a/src/Core/Cache/MemcachedCacheDriver.php
+++ b/src/Core/Cache/MemcachedCacheDriver.php
@@ -2,7 +2,6 @@
 
 namespace Friendica\Core\Cache;
 
-use Friendica\BaseObject;
 use Friendica\Core\Cache;
 
 /**
@@ -10,7 +9,7 @@ use Friendica\Core\Cache;
  *
  * @author Hypolite Petovan <mrpetovan@gmail.com>
  */
-class MemcachedCacheDriver extends BaseObject implements IMemoryCacheDriver
+class MemcachedCacheDriver extends AbstractCacheDriver
 {
 	use TraitCompareSet;
 	use TraitCompareDelete;
@@ -38,9 +37,10 @@ class MemcachedCacheDriver extends BaseObject implements IMemoryCacheDriver
 	public function get($key)
 	{
 		$return = null;
+		$cachekey = $this->getCacheKey($key);
 
 		// We fetch with the hostname as key to avoid problems with other applications
-		$value = $this->memcached->get(self::getApp()->get_hostname() . ':' . $key);
+		$value = $this->memcached->get($cachekey);
 
 		if ($this->memcached->getResultCode() === \Memcached::RES_SUCCESS) {
 			$return = $value;
@@ -51,16 +51,18 @@ class MemcachedCacheDriver extends BaseObject implements IMemoryCacheDriver
 
 	public function set($key, $value, $ttl = Cache::FIVE_MINUTES)
 	{
+		$cachekey = $this->getCacheKey($key);
+
 		// We store with the hostname as key to avoid problems with other applications
 		if ($ttl > 0) {
 			return $this->memcached->set(
-				self::getApp()->get_hostname() . ':' . $key,
+				$cachekey,
 				$value,
 				time() + $ttl
 			);
 		} else {
 			return $this->memcached->set(
-				self::getApp()->get_hostname() . ':' . $key,
+				$cachekey,
 				$value
 			);
 		}
@@ -69,9 +71,8 @@ class MemcachedCacheDriver extends BaseObject implements IMemoryCacheDriver
 
 	public function delete($key)
 	{
-		$return = $this->memcached->delete(self::getApp()->get_hostname() . ':' . $key);
-
-		return $return;
+		$cachekey = $this->getCacheKey($key);
+		return $this->memcached->delete($cachekey);
 	}
 
 	public function clear()
@@ -89,6 +90,7 @@ class MemcachedCacheDriver extends BaseObject implements IMemoryCacheDriver
 	 */
 	public function add($key, $value, $ttl = Cache::FIVE_MINUTES)
 	{
-		return $this->memcached->add(self::getApp()->get_hostname() . ":" . $key, $value, $ttl);
+		$cachekey = $this->getCacheKey($key);
+		return $this->memcached->add($cachekey, $value, $ttl);
 	}
 }
diff --git a/src/Core/Cache/RedisCacheDriver.php b/src/Core/Cache/RedisCacheDriver.php
index 735418b2d2..8f85e67d78 100644
--- a/src/Core/Cache/RedisCacheDriver.php
+++ b/src/Core/Cache/RedisCacheDriver.php
@@ -2,7 +2,6 @@
 
 namespace Friendica\Core\Cache;
 
-use Friendica\BaseObject;
 use Friendica\Core\Cache;
 
 /**
@@ -11,7 +10,7 @@ use Friendica\Core\Cache;
  * @author Hypolite Petovan <mrpetovan@gmail.com>
  * @author Roland Haeder <roland@mxchange.org>
  */
-class RedisCacheDriver extends BaseObject implements IMemoryCacheDriver
+class RedisCacheDriver extends AbstractCacheDriver
 {
 	/**
 	 * @var \Redis
@@ -34,9 +33,10 @@ class RedisCacheDriver extends BaseObject implements IMemoryCacheDriver
 	public function get($key)
 	{
 		$return = null;
+		$cachekey = $this->getCacheKey($key);
 
 		// We fetch with the hostname as key to avoid problems with other applications
-		$cached = $this->redis->get(self::getApp()->get_hostname() . ':' . $key);
+		$cached = $this->redis->get($cachekey);
 
 		// @see http://php.net/manual/en/redis.get.php#84275
 		if (is_bool($cached) || is_double($cached) || is_long($cached)) {
@@ -57,16 +57,18 @@ class RedisCacheDriver extends BaseObject implements IMemoryCacheDriver
 
 	public function set($key, $value, $ttl = Cache::FIVE_MINUTES)
 	{
+		$cachekey = $this->getCacheKey($key);
+
 		// We store with the hostname as key to avoid problems with other applications
 		if ($ttl > 0) {
 			return $this->redis->setex(
-				self::getApp()->get_hostname() . ":" . $key,
+				$cachekey,
 				time() + $ttl,
 				serialize($value)
 			);
 		} else {
 			return $this->redis->set(
-				self::getApp()->get_hostname() . ":" . $key,
+				$cachekey,
 				serialize($value)
 			);
 		}
@@ -88,11 +90,13 @@ class RedisCacheDriver extends BaseObject implements IMemoryCacheDriver
 	 */
 	public function add($key, $value, $ttl = Cache::FIVE_MINUTES)
 	{
+		$cachekey = $this->getCacheKey($key);
+
 		if (!is_int($value)) {
 			$value = serialize($value);
 		}
 
-		return $this->redis->setnx(self::getApp()->get_hostname() . ":" . $key, $value);
+		return $this->redis->setnx($cachekey, $value);
 	}
 
 	/**
@@ -100,20 +104,22 @@ class RedisCacheDriver extends BaseObject implements IMemoryCacheDriver
 	 */
 	public function compareSet($key, $oldValue, $newValue, $ttl = Cache::FIVE_MINUTES)
 	{
+		$cachekey = $this->getCacheKey($key);
+
 		if (!is_int($newValue)) {
 			$newValue = serialize($newValue);
 		}
 
-		$this->redis->watch(self::getApp()->get_hostname() . ":" . $key);
+		$this->redis->watch($cachekey);
 		// If the old value isn't what we expected, somebody else changed the key meanwhile
-		if ($this->get($key) === $oldValue) {
+		if ($this->get($cachekey) === $oldValue) {
 			if ($ttl > 0) {
 				$result = $this->redis->multi()
-					->setex(self::getApp()->get_hostname() . ":" . $ttl, $key, $newValue)
+					->setex($cachekey, $ttl, $newValue)
 					->exec();
 			} else {
 				$result = $this->redis->multi()
-					->set(self::getApp()->get_hostname() . ":" . $key, $newValue)
+					->set($cachekey, $newValue)
 					->exec();
 			}
 			return $result !== false;
@@ -126,11 +132,13 @@ class RedisCacheDriver extends BaseObject implements IMemoryCacheDriver
 	 */
 	public function compareDelete($key, $value)
 	{
-		$this->redis->watch(self::getApp()->get_hostname() . ":" . $key);
+		$cachekey = $this->getCacheKey($key);
+
+		$this->redis->watch($cachekey);
 		// If the old value isn't what we expected, somebody else changed the key meanwhile
 		if ($this->get($key) === $value) {
 			$result = $this->redis->multi()
-				->del(self::getApp()->get_hostname() . ":" . $key)
+				->del($cachekey)
 				->exec();
 			return $result !== false;
 		}
diff --git a/src/Core/Lock/CacheLockDriver.php b/src/Core/Lock/CacheLockDriver.php
index 2dd6f3fad9..ccbbb8a350 100644
--- a/src/Core/Lock/CacheLockDriver.php
+++ b/src/Core/Lock/CacheLockDriver.php
@@ -29,7 +29,7 @@ class CacheLockDriver extends AbstractLockDriver
 		$got_lock = false;
 		$start = time();
 
-		$cachekey = self::getCacheKey($key);
+		$cachekey = self::getLockKey($key);
 
 		do {
 			$lock = $this->cache->get($cachekey);
@@ -62,7 +62,7 @@ class CacheLockDriver extends AbstractLockDriver
 	 */
 	public function releaseLock($key)
 	{
-		$cachekey = self::getCacheKey($key);
+		$cachekey = self::getLockKey($key);
 
 		$this->cache->compareDelete($cachekey, getmypid());
 		$this->markRelease($key);
@@ -73,7 +73,7 @@ class CacheLockDriver extends AbstractLockDriver
 	 */
 	public function isLocked($key)
 	{
-		$cachekey = self::getCacheKey($key);
+		$cachekey = self::getLockKey($key);
 		$lock = $this->cache->get($cachekey);
 		return isset($lock) && ($lock !== false);
 	}
@@ -82,7 +82,7 @@ class CacheLockDriver extends AbstractLockDriver
 	 * @param string $key	The original key
 	 * @return string		The cache key used for the cache
 	 */
-	private static function getCacheKey($key) {
-		return self::getApp()->get_hostname() . ";lock:" . $key;
+	private static function getLockKey($key) {
+		return "lock:" . $key;
 	}
 }