## Proposed changes Do `load_cache_info_into_memory()` asynchronously in a background thread in `LRUFileCache::initialize()`. When the cache is not ready, `LRUFileCache::get_or_set()` will return the FileBlock which state is SKIP_CACHE.
## Proposed changes Do `load_cache_info_into_memory()` asynchronously in a background thread in `LRUFileCache::initialize()`. When the cache is not ready, `LRUFileCache::get_or_set()` will return the FileBlock which state is SKIP_CACHE.