US Patent 10423468 Complex event processing using pseudo-clock

Systems and methods for complex event processing. An example method may comprise: receiving, by a processing device of a first event processing node, an event data item reflecting a change of a system state, the event data item comprising a unique event identifier and a timestamp; and, responsive to determining a difference between the timestamp and a value of a pseudo-clock associated with the first event processing node, synchronizing the state of the first event processing node with the state of a second event processing node by adjusting the pseudo-clock by the difference.