How to store your own key-value pairs in Redis using PhpRedis with D7 Redis module We have the D7 Redis module installed, which is being used as the cache mechanism for D7 caching. That module uses PhpRedis as the underlying library. 

I would like to use that same Redis instance to cache a large amount of non-Drupal data that is retrieved from an external API, then will be rendered on a specific Drupal page. I'm wondering how I can get ahold of the Redis object instance that Drupal is already using, so I can use PhpRedis functions like $redis->set(key,value)?
Once configured/initialized, the module has a wrapper class/interface Redis_Client
 that contains the library object. It can be retrieved with the getClient() method:

$redis = Redis_Client::getClient()