Live replication of virtual machines

Authors:
Violeta Medina;Juan Manuel García
Affiliations:
Universidad Michoacana de San Nicolás de Hidalgo, División de Estudios de Posgrado, Facultad de Ingeniería Eléctrica, Morelia, Mich., México;Instituto Tecnológico de Morelia, Computer System Department, Morelia, Mich., México
Venue:
SEPADS'11 Proceedings of the 10th WSEAS international conference on Software engineering, parallel and distributed systems
Year:
2011

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Abstract

Replication has been identified as a useful mechanism in Virtual Machine (VM) management. Replication allows the network administrators to face some daily troubles like system faults, load balancing and scheduled/unscheduled maintenances. A desirable characteristic during this process is zero downtime, the replication process should cause a minimal service interruption if a Virtual Machine becomes unavailable. Replication has been identified as a tool to achieve high availability in a computational system. In this paper a live replication protocol to reach high availability in services for virtual machines is proposed. It consists on replicating every task that a virtual machine executes to other virtual machine. Each individual result that is obtained in a virtual machine called original is also obtained in a Virtual Machine called replica. The protocol is based on TCP/IP. This mechanism duplicates each command that the original virtual machine receives and sends it to the replica virtual machine.