Because the [Vesta] cache server and evaluator(s) continue … access existing ones. … A lease [refs] is an agreement between two … not in active communication. … while a lease on a cache entry is … [p. 154] [To avoid livelock] The cache server establishes … a hit filter, meaning that, until otherwise instructed, … the hit filter.
Google-1
Google-2
Copyright clearance needed for quotation.