US Patent 8639786 Consistency domains for replication in distributed computing

A computing device performs an operation by a first computing device and updates a shared system state on the first computing device based on the operation. The computing device causes the shared system state to be updated on a second computing device using a strongly consistent replication mechanism, wherein the first computing device and the second computing device are members of a first consistency domain. The computing device also causes the shared system state to be updated on a third computing device using a weakly consistent replication mechanism, wherein the third computing device is a member of a second consistency domain.