ALL: Highly consistent. A write must be written to commitlog and memtable on all replica nodes in the cluster
EACH_QUORUM: A write must be written to commitlog and memtable on quorum of replica nodes in all data centers.
LOCAL_QUORUM:A write must be written to commitlog and memtable on quorum of replica nodes in the same center.
ONE: A write must be written to commitlog and memtableof at least one replica node.
TWO, Three: Same as One but at least two and three replica nodes, respectively
LOCAL_ONE: A write must be written for at least one replica node in the local data center ANY
SERIAL: Linearizable Consistency to prevent unconditional updates
LOCAL_SERIAL: Same as Serial but restricted to local data center
