System supporting fault tolerance and control method thereof

Abstract

A control method of a system supporting fault tolerance is provided, at first, a first host executes a transmission control protocol agent to receive a data stream from a client device. Then the TCP agent transmits an acknowledgement packet to the client device in response to the data stream from the client device. Then the TCP agent determines whether a fault tolerance mechanism of the virtual machine is activated. When the TCP agent determines that the fault tolerance mechanism of the virtual machine is activated, the TCP agent determines whether the virtual machine operates in a running state. When the TCP agent determines that the virtual machine is not in the running state, the TCP agent temporarily storing the data stream. When the TCP agent determines that the virtual machine operates in a running state, the TCP agent transmits the data stream to the virtual machine.

Description

Technical field [0001] The present invention relates to a host system with a fault-tolerant mechanism. Background technique [0002] The virtual machine in the host uses the state of the virtual machine's peripheral input / output of the virtual machine and the state of the memory to the backup host, so that the backup of the backup virtual machine in the backup host is completely identical to the virtual machine, thereby implementing the virtual The fault tolerance mechanism of the machine. When the virtual machine wants to transmit the data packet to the client device, in order to allow the state of the backup virtual machine to be consistent with the external state, the virtual machine monitoring layer in the host will be telemarked, until the virtual machine's peripheral input The status of the output and the state of the memory are completely backed up to the backup host, and the virtual machine monitoring layer transmits the data packet to the client device. When the client...

AI Technical Summary

Problems solved by technology

It can be seen from this that although the host can achieve the purpose of state backup after starting the fault tolerance mechanism, it will cause the disadvantage of a decrease in the network transmission rate.

[0004] In view of this, there is indeed a need for an improved fault-tolerant system. In addition to achieving the purpose of state backup, it can also improve the shortcomings of the network transmission rate drop.

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