The in-memory cache server we all know and love released a new version with notable new features being the implementation of a binary protocol, a bunch of new stats commands for pulling CAS numbers and slab class eviction times, and a hodge-podge of performance improvements.
What’s interesting? Replication. The binary protocol allows for traditional replication of data between memcached servers in a cluster and therefore can increase the amount you can theoretically rely on the data stored in your cluster. With an increase in precaching and push type models for storing complex relationships (graphs, etc) memcached is maintaining its place at the top of the in-memory datastores with this bump in reliability.