'session' => [
    'save' => 'redis',
    'redis' => [
+       'client' => 'relay',
        'host' => '127.0.0.1',
        'port' => 6379,
        'database' => 2,
        // ...
    ]
],

'cache' => [
    'frontend' => [
        'default' => [
            'id_prefix' => '5ac_',
-           'backend' => 'Magento\\Framework\\Cache\\Backend\\Redis',
+           'backend' => 'CacheWerk\\Relay\\Cache\\Backend\\Relay',
            'backend_options' => [
                'server' => '127.0.0.1',
                'port' => 6379,
                'database' => 0,
                // ...
            ]
        ],
        'page_cache' => [
            'id_prefix' => '5ac_',
-           'backend' => 'Magento\\Framework\\Cache\\Backend\\Redis',
+           'backend' => 'CacheWerk\\Relay\\Cache\\Backend\\Relay',
            'backend_options' => [
                'server' => '127.0.0.1',
                'port' => 6379,
                'database' => 1,
                // ...
            ]
        ]
    ],
],