I'm using a call to Mage::getSingleton('core/cache')->save() within a controller of mine and it's saving the cached value to the file system (var/cache/) even though Redis is configured as my cache backend, and seemingly all other cache in Magento is being saved properly to Redis.

Here's the save() call:

Mage::getSingleton('core/cache')->save($imageUrl, $cacheKey, array(Mage_Core_Model_Config::CACHE_TAG));

Here's my app/etc/local.xml:


Why is it saving that cached value to the file system instead of Redis?


1 Answer 1


You should be using Mage::app()->getCache()->save() as the cache gets initialised in the getCache() method by fetching the config and setting this for the cache object, whereas the Mage_Core_Model_Cache constructor does not do this, as far as I can see and it will revert back to the default caching model.

Did a quick test with:

Mage::getSingleton('core/cache')->save(now(), 'time123', array(Mage_Core_Model_Config::CACHE_TAG)); 


Mage::app()->getCache()->save(now(), 'time12345', array(Mage_Core_Model_Config::CACHE_TAG));

Further info:

Mage_Core_Model_App::_initCache actually uses the following to set up the cache object:

$this->_cache = Mage::getModel('core/cache', $options);

Which means the core cache object is not added to the registry for use as a singleton. The first time you call it as a singleton a new core cache object is created and the constructor is called without any options.

  • 1
    Wow, I'm feeling a little bit sheepish right now. That worked! Thanks! Commented Sep 24, 2014 at 21:26

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