If TTL is zero, the expected behavior should expire immediately after put is success. 

TTL for the tuple will be calculated during recovery as shown below. 

• If you put tuple with TTL of 60 min at Nth Hour into the space, if you do not stop the cluster, the tuple eventually expires @ ~( Nth Hour +60 Min)

• If you stop the cluster at N Hour +30th min, the remaining time of the tuple expire is ~30 min.

• If you restart the cluster at N Hour +45th min and do recovery, the remaining time of the tuple expire will be ~30 min after  (N Hour +45th min).