虚拟外存管理技术研究

Virtual external memory management technology

为解决多虚拟机环境中的外存管理问题,研究了基于虚拟机监控器的多虚拟机结构,总结出了多虚拟机环境所面临的3个主要外存管理问题,即外存空间的隔离与保护、外存空间的按需分配和外存空间的扩展。借鉴操作系统中成熟的虚拟内存管理思想,提出了一种虚拟外存管理器的设计方案,有效地解决了外存管理中的上述问题。实验结果表明,虚拟分区可以动态创建和撤销,分区的容量可以根据实际需要动态增长,并可实现基于分区的写保护,外存管理的灵活性大大增加,外存空间的利用率大大提高。

To address the external memory management issues in multiple virtual machine environment,the multiple virtual machine architecture is studied based on the virtual machine monitor.We sum up with the three main external memory management issues that virtual machine environment faced,namely,the isolation and protection of external memory space,the disributation of external memory space according to need and the expansion of it.Learning from the mature virtual memory management thought of operating system,we present a virtual external memory manager design,which effectively resolves the external memory management of the above problems.Experiments show that the virtual partition can be dynamically created and abolished,the capacity of virtual partition can be based on actual needs of dynamic growth and can achieve the partition-based write protection,the flexibility of external memory management greatly increased and the utilization of external memory space greatly improved.