data-structures as a service. need an atomic lock shared between multiple processes or servers (x) need a set of unique values sorted by insertion time (x) w

data-structures as a service. need an atomic lock shared between multiple processes or servers (x) need a set of unique values sorted by insertion time (x) want to know the O(x) complexity of using any of the data-structures to design a system for scale (x) need to notify multiple consumers of a modification ala pub-sub (x) need to keep track of a stream of events for consumers (x) need to do geo-spatial lookups (x) oh and you want this thing to be durable to failure and easy to maintain (sentinel|cluster) (x) redis is single process and easy to configure and understand that's my opinion of why it's so amazeballs. [edit] unicode not supported so x instead