CacheBackendInterface

class \Drupal\Core\Cache\ApcuBackend implements \Drupal\Core\Cache\CacheBackendInterface
class \Drupal\Core\Cache\BackendChain implements \Drupal\Core\Cache\CacheBackendInterface, \Drupal\Core\Cache\CacheTagsInvalidatorInterface
class \Drupal\Core\Cache\ChainedFastBackend implements \Drupal\Core\Cache\CacheBackendInterface, \Drupal\Core\Cache\CacheTagsInvalidatorInterface
class \Drupal\Core\Cache\DatabaseBackend implements \Drupal\Core\Cache\CacheBackendInterface
class \Drupal\Core\Cache\MemoryBackend implements \Drupal\Core\Cache\CacheBackendInterface, \Drupal\Core\Cache\CacheTagsInvalidatorInterface
class \Drupal\Core\Cache\MemoryCache\MemoryCache extends \Drupal\Core\Cache\MemoryBackend implements \Drupal\Core\Cache\MemoryCache\MemoryCacheInterface
class \Drupal\Core\Cache\MemoryCounterBackend extends \Drupal\Core\Cache\MemoryBackend
class \Drupal\Core\Cache\NullBackend implements \Drupal\Core\Cache\CacheBackendInterface
class \Drupal\Core\Cache\PhpBackend implements \Drupal\Core\Cache\CacheBackendInterface
class \Drupal\Core\Update\UpdateBackend extends \Drupal\Core\Cache\NullBackend