Abstract: The present disclosure relates to packet-aware fault tolerance methods of virtual machines applied to cloud services. One such method includes using a primary input processing unit to receive an uploaded packet and replicating the uploaded packet to a backup input processing unit. The method can further include utilizing a primary execution unit to operate the uploaded packet to generate an output packet, which is then transmitted to a processing unit. A backup execution unit can be used to operate the uploaded packet to generate a backup output packet. The backup output packet can be transmitted to a backup processing unit. A fault-tolerance control component can receive the primary output packet from the primary output processing unit. The primary fault-tolerance control component can be used to compare a primary packet checksum of the primary output packet is consistent with a backup packet checksum.

Abstract: A packet-aware fault-tolerance method of a virtual machine applied to cloud services, the method including the following steps: receiving, by a primary input processing unit, an uploaded packet; replicating, by the primary input processing unit, the uploaded packet to a backup input processing unit; operating, by a primary execution unit, the uploaded packet to generate a primary output packet, and transmitting the primary output packet to a primary output processing unit, and operating, by a backup execution unit, the uploaded packet to generate a backup output packet, and transmitting the backup output packet to a backup output processing unit; receiving, by a primary fault-tolerance control component, the primary output packet transmitted by the primary output processing unit, and receiving a backup packet checksum of the backup output packet transmitted by the backup output processing unit; and comparing, by the primary fault-tolerance control component, whether a primary packet checksum of the primary ou