I was thinking about that too, but since it is not possible to change existing items and the computation of those items must be re-entrant (groupcache just trie

I was thinking about that too, but since it is not possible to change existing items and the computation of those items must be re-entrant (groupcache just tries to avoid duplicate computations but does not guarantee it), there seems to be no reason for any distributed consensus. In fact, the groupcache design is astonishing simple.