Patent ID: 8898518
Filing Date: 2014-11-25
Classification: G06F

Abstract:
1. A method for transmitting an updated state of a primary computer system to a backup computer system through an intermediary computer system, the method comprising: receiving, at the intermediary computer system, checkpoint information packets from the primary computer system through a first network connection, wherein each checkpoint information packet comprises updated data corresponding to memory pages of the primary computer system that have been modified since a previously received checkpoint information packet; determining, by the intermediary computer system, whether each copy of memory pages of the primary computer system stored at the intermediary computer system is a copy of a memory page that has been least recently updated by the primary computer system and has not been transmitted to the backup computer system; and transmitting, by the intermediary computer system, updated data in each copy of each memory page determined to be a least recently updated memory page to the backup computer system through a second network connection.