Abstract:

 In virtualization environment, how to develop a novel data transfer method, which not only ensures the stability but also guarantees the performance of the system based on writethrough and writeback schemes, is an attractive topic. Based on the platform of computing system virtualization XEN, this paper proposes a new scheme to deal with dirty memory data effectively and reliably with the help of virtualized environment. This method is equipped with the advantages of both writethrough and writeback method in traditional architectures. It not only ensures the integrity and reliability of user data in the situation of system crash, but also provides satisfying performance with applications. Experiments are carried out to evaluate the system. The results show that the new scheme is able to work efficiently and can well protect the integrity of user data even if the operating system crashes unexpectedly.

Key words: computing system virtualization;disk I/O;operating system