Store WordPress session tokens in Redis rather than the usermeta table. Requires the Redis PECL extension.
@phpdoc extension php for IDE autocomplete
PHP 5.3+ redis-sentinel client for php based on phpredis extension.
Zend Server Z-Ray extension for displaying Redis information, configuration, memory, cache writes and reads
Trying to figure out why PHP 7.1 and PHP 7.0 won't play nice with the Redis extension