Apex comes with built-in support for redis, which is a popular in-memory storage engine allowing for extremely quick retrieval and storage of data. The php-redis extension is used, which provides a very easy and efficient API to communicate with redis.
This service provides full access to the php-redis class, for example:
namespace apex; use apex\app; use apex\svc\redis; redis::hset('some_hash', 'var_name', 'value'); $value = redis::hget('some_hash', 'var_name');
For more information on redis, the data types and functions available, and php-redis, please visit the below links.