public ChainedFastBackend::set($cid, $data, $expire = Cache::PERMANENT, array $tags = array())
Stores data in the persistent cache.
Core cache implementations set the created time on cache item with microtime(TRUE) rather than REQUEST_TIME_FLOAT, because the created time of cache items should match when they are created, not when the request started. Apart from being more accurate, this increases the chance an item will legitimately be considered valid.
Parameters
string $cid: The cache ID of