Caches in web architectures seem to be similar to NUMA style addressing and makes me think that cache invalidations in web should have failovers to an L2 or L3

Caches in web architectures seem to be similar to NUMA style addressing and makes me think that cache invalidations in web should have failovers to an L2 or L3 if the L1 is gone differentiating between an expected invalidation or an unexpected invalidation (Redis down, let’s say). Sometimes in an emergency (security incident, let’s say) all cache items should be invalidated though resulting in said 500 or temporarily unavailable response while the cache is repopulated again and that’s something else that Djikstra would shake his fist angrily at from beyond the grave just the same.