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1. request that Pantheon enable redis via a help ticket
2. install drupal redis module

3. In settings.php we drop in

   Code Block

   /** * Perform web and drush operations on Pantheon * see http://helpdesk.getpantheon.com/customer/portal/articles/708588 */ if (defined('PANTHEON_ENVIRONMENT')) {   // Use Redis for caching on TEST and LIVE if (in_array(PANTHEON_ENVIRONMENT, array('test', 'live'))) { $conf['redis_client_interface'] = 'PhpRedis'; $conf['cache_backends'][] = 'sites/all/modules/contrib/redis/redis.autoload.inc'; $conf['cache_default_class'] = 'Redis_Cache'; $conf['cache_prefix'] = array('default' => 'pantheon-redis'); // Do not use Redis for cache_form (no performance difference). $conf['cache_class_cache_form'] = 'DrupalDatabaseCache'; // Use Redis for Drupal locks (semaphore). $conf['lock_inc'] = 'sites/all/modules/contrib/redis/redis.lock.inc'; }   }

4. to access Pantheon redis, you will need local command line tools.
   this is easiest with homebrew on OS X:

   Code Block
   $ brew install redis

   or you can download at http://redis.io/download for all OSes.

    To install with Docker:
   docker pull shopigniter/redis-cli

   


5. Once install you will need to log in using the credentials from the pantheon dashboard
   to flush the cache on DEV.
   This is useful so that we have a baseline for testing speed gains and debugging. 

   Code Block
   $ redis-cli -h XXX.XXX.XXX.XXX -p XXXX -a xxxxxxxxxxxxxxxxxxxxxxxxxxx > flushall   $ docker run -i -t --rm=true shopigniter/redis-cli -h XXX.XXX.XXX.XXX -p XXXX -a xxxxxxxxxxxxxxxxxxxxxxxxxxx > flushall

External docs

• http://redis.io/topics/config
• http://helpdesk.getpantheon.com/customer/portal/articles/401317-understanding-redis-cache

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